<?php  // $Id: locallib.php,v 1.43.2.4 2010/02/18 18:39:12 mudrd8mz Exp $

/// Library of extra functions and module workshop 

$WORKSHOP_TYPE = array (0 => get_string('notgraded', 'workshop'),
                          1 => get_string('accumulative', 'workshop'),
                          2 => get_string('errorbanded', 'workshop'),
                          3 => get_string('criterion', 'workshop'),
                          4 => get_string('rubric', 'workshop') );

$WORKSHOP_SHOWGRADES = array (0 => get_string('dontshowgrades', 'workshop'),
                          1 => get_string('showgrades', 'workshop') );

$WORKSHOP_SCALES = array( 
                    0 => array( 'name' => get_string('scaleyes', 'workshop'), 'type' => 'radio', 
                        'size' => 2, 'start' => get_string('yes'), 'end' => get_string('no')),
                    1 => array( 'name' => get_string('scalepresent', 'workshop'), 'type' => 'radio', 
                        'size' => 2, 'start' => get_string('present', 'workshop'), 
                        'end' => get_string('absent', 'workshop')),
                    2 => array( 'name' => get_string('scalecorrect', 'workshop'), 'type' => 'radio', 
                        'size' => 2, 'start' => get_string('correct', 'workshop'), 
                        'end' => get_string('incorrect', 'workshop')), 
                    3 => array( 'name' => get_string('scalegood3', 'workshop'), 'type' => 'radio', 
                        'size' => 3, 'start' => get_string('good', 'workshop'), 
                        'end' => get_string('poor', 'workshop')), 
                    4 => array( 'name' => get_string('scaleexcellent4', 'workshop'), 'type' => 'radio', 
                        'size' => 4, 'start' => get_string('excellent', 'workshop'), 
                        'end' => get_string('verypoor', 'workshop')),
                    5 => array( 'name' => get_string('scaleexcellent5', 'workshop'), 'type' => 'radio', 
                        'size' => 5, 'start' => get_string('excellent', 'workshop'), 
                        'end' => get_string('verypoor', 'workshop')),
                    6 => array( 'name' => get_string('scaleexcellent7', 'workshop'), 'type' => 'radio', 
                        'size' => 7, 'start' => get_string('excellent', 'workshop'), 
                        'end' => get_string('verypoor', 'workshop')),
                    7 => array( 'name' => get_string('scale10', 'workshop'), 'type' => 'selection', 
                        'size' => 10),
                    8 => array( 'name' => get_string('scale20', 'workshop'), 'type' => 'selection', 
                            'size' => 20),
                    9 => array( 'name' => get_string('scale100', 'workshop'), 'type' => 'selection', 
                            'size' => 100)); 


//////////////////////////////////////////////////////////////////////////////////////

/*** Functions for the workshop module ******

workshop_choose_from_menu ($options, $name, $selected="", $nothing="choose", $script="", 
    $nothingvalue="0", $return=false) {

workshop_compare_assessments($workshop, $assessment1, $assessment2) { ---> in lib.php
workshop_count_all_submissions_for_assessment($workshop, $user) {
workshop_count_assessments($submission) { ---> in lib.php
workshop_count_comments($assessment) {
workshop_count_peer_assessments($workshop, $user) {
workshop_count_self_assessments($workshop, $user) {
workshop_count_student_submissions($workshop) {
workshop_count_student_submissions_for_assessment($workshop, $user) {
workshop_count_teacher_assessments($courseid, $submission) {
workshop_count_teacher_assessments_by_user($workshop, $user) {
workshop_count_teacher_submissions($workshop) {
workshop_count_teacher_submissions_for_assessment($workshop, $user) {
workshop_count_ungraded_assessments($workshop) { --->in lib.php
workshop_count_ungraded_assessments_student($workshop) {
workshop_count_ungraded_assessments_teacher($workshop) {
workshop_count_user_assessments($worshop, $user, $type = "all") { $type is all, student or teacher
workshop_count_user_submissions($workshop, $user) {

workshop_delete_submitted_files($workshop, $submission) {
workshop_delete_user_files($workshop, $user, $exception) {

workshop_file_area($workshop, $submission) { ---> in lib.php
workshop_file_area_name($workshop, $submission) { ---> in lib.php

workshop_get_all_teacher_assessments($workshop) {
workshop_get_assessments($submission, $all = '') { ---> in lib.php
workshop_get_comments($assessment) {
workshop_get_participants($workshopid) {
workshop_get_student_assessments($workshop, $user) {
workshop_get_student_submission($workshop, $user) { ---> in lib.php
workshop_get_student_submission_assessments($workshop) {
workshop_get_student_submissions($workshop) { ---> in lib.php
workshop_get_submission_assessment($submission, $user) {
workshop_get_teacher_assessments($courseid, $submission) {
workshop_get_teacher_submission_assessments($workshop) {
workshop_get_teacher_submissions($workshop) {
workshop_get_ungraded_assessments($workshop) {
workshop_get_unmailed_assessments($cutofftime) {
workshop_get_unmailed_marked_assessments($cutofftime) {
workshop_get_user_assessments($workshop, $user) { ---> in lib.php
workshop_get_user_submissions($workshop, $user) { ---> in lib.php
workshop_get_users_done($workshop) {

workshop_grade_assessments($workshop) { ---> in lib.php

workshop_list_all_submissions($workshop) {
workshop_list_all_ungraded_assessments($workshop) {
workshop_list_assessed_submissions($workshop, $user) {
workshop_list_peer_assessments($workshop, $user) {
workshop_list_student_submissions($workshop, $user) {
workshop_list_submissions_for_admin($workshop, $order) {
workshop_list_teacher_assessments_by_user($workshop, $user) {
workshop_list_teacher_submissions($workshop) {
workshop_list_unassessed_student_submissions($workshop, $user) {
workshop_list_unassessed_teacher_submissions($workshop, $user) {
workshop_list_ungraded_assessments($workshop, $stype) {
workshop_list_user_submissions($workshop, $user) {

workshop_calculate_phase($workshop, $style='') {

workshop_print_assessment($workshop, $assessment, $allowchanges, $showcommentlinks, $returnto)
workshop_print_assessments_by_user_for_admin($workshop, $user) {
workshop_print_assessments_for_admin($workshop, $submission) {
workshop_print_assignment_info($cm, $workshop) {
workshop_print_difference($time) {
workshop_print_feedback($course, $submission) {
workshop_print_league_table($workshop) {
workshop_print_submission_assessments($workshop, $submission, $type) {
workshop_print_submission_title($workshop, $user) {
workshop_print_time_to_deadline($time) {
workshop_print_upload_form($workshop) {
workshop_print_user_assessments($workshop, $user) {

workshop_submission_grade($submission) { ---> in lib.php
    
workshop_test_user_assessments($workshop, $user) {
***************************************/


///////////////////////////////////////////////////////////////////////////////
function workshop_choose_from_menu ($options, $name, $selected="", $nothing="choose", $script="", 
        $nothingvalue="0", $return=false) {
/// Given an array of value, creates a popup menu to be part of a form
/// $options["value"]["label"]
    
    if ($nothing == "choose") {
        $nothing = get_string("choose")."...";
    }

    if ($script) {
        $javascript = "onChange=\"$script\"";
    } else {
        $javascript = "";
    }

    $output = "<select name=\"$name\" $javascript>\n";
    if ($nothing) {
        $output .= "   <option value=\"$nothingvalue\"\n";
        if ($nothingvalue == $selected) {
            $output .= " selected=\"selected\"";
        }
        $output .= ">$nothing</option>\n";
    }
    if (!empty($options)) {
        foreach ($options as $value => $label) {
            $output .= "   <option value=\"$value\"";
            if ($value == $selected) {
                $output .= " selected=\"selected\"";
            }
            // stop zero label being replaced by array index value
            // if ($label) {
            //    $output .= ">$label</option>\n";
            // } else {
            //     $output .= ">$value</option>\n";
            //  }
            $output .= ">$label</option>\n";
            
        }
    }
    $output .= "</select>\n";

    if ($return) {
        return $output;
    } else {
        echo $output;
    }
}   


///////////////////////////////////////////////////////////////////////////////////////////////
function workshop_copy_assessment($assessment, $submission, $withfeedback = false) {
    // adds a copy of the given assessment for the submission specified to the workshop_assessments table. 
    // The grades and optionally the comments are added to the workshop_grades table. Returns the new
    // assessment object. The owner of the assessment is not changed.
    
    $yearfromnow = time() + 365 * 86400;
    $newassessment->workshopid = $assessment->workshopid;
    $newassessment->submissionid = $submission->id;
    $newassessment->userid = $assessment->userid;
    $newassessment->timecreated = $yearfromnow;
    $newassessment->grade = $assessment->grade;
    if ($withfeedback) {
        $newassessment->generalcomment = addslashes($assessment->generalcomment);
        $newassessment->teachercomment = addslashes($assessment->teachercomment);
    }
    if (!$newassessment->id = insert_record("workshop_assessments", $newassessment)) {
        error("Copy Assessment: Could not insert workshop assessment!");
    }
    
    if ($grades = get_records("workshop_grades", "assessmentid", $assessment->id)) {
        foreach ($grades as $grade) {
            unset($grade->id); // clear id, insert record now seems to believe it!
            if (!$withfeedback) {
                $grade->feedback = '';
            }
            else {
                $grade->feedback = addslashes($grade->feedback);
            }
            $grade->assessmentid = $newassessment->id;
            if (!$grade->id = insert_record("workshop_grades", $grade)) {
                error("Copy Assessment: Could not insert workshop grade!");
            }
        }
    }
    if ($withfeedback) {
        // remove the slashes from comments as the new assessment record might be used, 
        // currently this function is only called in upload which does not!
        $newassessment->generalcomment = stripslashes($assessment->generalcomment);
        $newassessment->teachercomment = stripslashes($assessment->teachercomment);
    }
    return $newassessment;
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_all_submissions_for_assessment($workshop, $user) {
    // looks at all submissions and deducts the number which has been assessed by this user
    $n = 0;
    if ($submissions = get_records_select("workshop_submissions", "workshopid = $workshop->id AND 
                timecreated > 0")) {
        $n =count($submissions);
        foreach ($submissions as $submission) {
            $n -= count_records("workshop_assessments", "submissionid", $submission->id, "userid", $user->id);
            }
        }
    return $n;
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_comments($assessment) {
    // Return the number of comments for this assessment provided they are newer than the assessment, 
   return count_records_select("workshop_comments", "(assessmentid = $assessment->id) AND 
        timecreated > $assessment->timecreated");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_peer_assessments($workshop, $user) {
    // returns the number of assessments made by students on user's submissions
    
    $n = 0;
    if ($submissions = workshop_get_user_submissions($workshop, $user)) {
        foreach ($submissions as $submission) {
            if ($assessments = workshop_get_assessments($submission)) {
                foreach ($assessments as $assessment) {
                    // ignore teacher assessments
                    if (!workshop_is_teacher($workshop, $assessment->userid)) {
                        $n++;
                        }
                    }
                }
            }
        }
    return $n;
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_self_assessments($workshop, $user) {
    // returns the number of assessments made by user on their own submissions
    
    $n = 0;
    if ($submissions = workshop_get_user_submissions($workshop, $user)) {
        foreach ($submissions as $submission) {
            if ($assessment = get_record_select("workshop_assessments", "userid = $user->id AND 
                    submissionid = $submission->id")) {
                $n++;
                }
            }
        }
    return $n;
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_student_submissions($workshop) {
    global $CFG;

    // make sure it works on the site course
    $select = "s.course = '$workshop->course' AND";
    if ($workshop->course == SITEID) {
        $select = '';
    }
    if (!$students = workshop_get_students($workshop)) {
        return 0;
    }
    $list = "(";
    foreach ($students as $student) {
        $list .= "$student->id,";
    }
    $list = rtrim($list, ',').")";

    return count_records_sql("SELECT count(*) FROM {$CFG->prefix}workshop_submissions s
                              WHERE $select s.userid IN $list
                                AND s.workshopid = $workshop->id
                                AND timecreated > 0");
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_student_submissions_for_assessment($workshop, $user) {
    global $CFG;

    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
        }
    
    $timenow = time();
    if (groupmode($course, $cm) == SEPARATEGROUPS) {
        $groupid = get_current_group($course->id);
    } else {
        $groupid = 0;
    }
    
    $n = 0;
    if ($submissions = workshop_get_student_submissions($workshop)) {
        foreach ($submissions as $submission) {
            // check group membership, if necessary
            if ($groupid) {
                // check user's group
                if (!groups_is_member($groupid, $submission->userid)) {
                    continue; // skip this user
                }
            }
            // check if submission is cold
            if (($submission->timecreated + $CFG->maxeditingtime) > $timenow) {
                continue; // skip this submission
            }
            // has any teacher assessed this submission?
            if (!workshop_count_teacher_assessments($course->id, $submission)) {
                $n++;
            }
        }
    }
    return $n;
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_teacher_assessments($courseid, $submission) {
// Return count of (cold) teacher assessments of a submission
    global $CFG;
    
    if (!$teachers = workshop_get_teachers($submission->workshopid)) {
        return 0;
    }
    $list = "(";
    foreach ($teachers as $teacher) {
        $list .= "$teacher->id,";
    }
    $list = rtrim($list, ',').")";
    $timenow = time();
    return count_records_sql("SELECT count(*) FROM {$CFG->prefix}workshop_assessments a
                              WHERE a.userid IN $list
                                AND a.submissionid = $submission->id
                                AND $timenow > (a.timecreated + $CFG->maxeditingtime)");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_teacher_assessments_by_user($workshop, $user) {
    // returns the number of assessments made by teachers on user's submissions
    
    $n = 0;
    if ($submissions = workshop_get_user_submissions($workshop, $user)) {
        foreach ($submissions as $submission) {
            if ($assessments = workshop_get_assessments($submission)) {
                foreach ($assessments as $assessment) {
                    // count only teacher assessments
                    if (workshop_is_teacher($workshop, $assessment->userid)) {
                        $n++;
                        }
                    }
                }
            }
        }
    return $n;
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_teacher_submissions($workshop) {
    global $CFG;
    if (!$teachers = workshop_get_teachers($workshop)) {
        return 0;
    }
    $list = "(";
    foreach ($teachers as $teacher) {
        $list .= "$teacher->id,";
    }
    $list = rtrim($list, ',').")";
    $timenow = time();
    
    return count_records_sql("SELECT count(*)
                              FROM {$CFG->prefix}workshop_submissions s
                              WHERE s.userid IN $list
                                AND s.workshopid = $workshop->id");
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_teacher_submissions_for_assessment($workshop, $user) {

    $n = 0;
    if ($submissions = workshop_get_teacher_submissions($workshop)) {
        $n =count($submissions);
        foreach ($submissions as $submission) {
            $n -= count_records("workshop_assessments", "submissionid", $submission->id, "userid", $user->id);
            }
        }
    return $n;
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_ungraded_assessments_student($workshop) {
    // function returns the number of ungraded assessments by students of STUDENT submissions
    $n = 0;
    if ($submissions = workshop_get_student_submissions($workshop)) {
        foreach ($submissions as $submission) {
            if ($assessments = workshop_get_assessments($submission)) {
                foreach ($assessments as $assessment) {
                    if ($assessment->timegraded == 0) {
                        // ignore teacher assessments
                        if (!workshop_is_teacher($workshop, $assessment->userid)) {
                            $n++;
                            }
                        }
                    }
                }
            }
        }
    return $n;
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_ungraded_assessments_teacher($workshop) {
    // function returns the number of ungraded assessments by students of TEACHER submissions
    global $CFG;

    $timenow = time();
    $n = 0;
    if ($submissions = workshop_get_teacher_submissions($workshop)) {
        foreach ($submissions as $submission) {
            if ($assessments = workshop_get_assessments($submission)) {
                foreach ($assessments as $assessment) {
                    if ($assessment->timegraded == 0) {
                        // ignore teacher assessments
                        if (!workshop_is_teacher($workshop, $assessment->userid)) {
                            // must have created a little time ago
                            if (($timenow - $assessment->timecreated) > $CFG->maxeditingtime) {
                                $n++;
                                }
                            }
                        }
                    }
                }
            }
        }
    return $n;
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_user_assessments($workshop, $user, $stype = "all") {
    // returns the number of assessments allocated/made by a user, all of them, or just those 
    // for the student or teacher submissions. The student's self assessments are included in the count.
    // The maxeditingtime is NOT taken into account here also, allocated assessments which have not yet
    // been done are counted as well
    
    $n = 0;
    if ($assessments = workshop_get_user_assessments($workshop, $user)) {
         foreach ($assessments as $assessment) {
            switch ($stype) {
                case "all" :
                    $n++;
                    break;
                case "student" :
                     $submission = get_record("workshop_submissions", "id", $assessment->submissionid);
                    if (workshop_is_student($workshop, $submission->userid)) {
                        $n++;
                        }
                    break;
                case "teacher" :
                     $submission = get_record("workshop_submissions", "id", $assessment->submissionid);
                    if (workshop_is_teacher($workshop, $submission->userid)) {
                        $n++;
                        }
                    break;
                }
            }
        }
    return $n;
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_user_assessments_done($workshop, $user) {
    // returns the number of assessments actually done by a user
    // the student's self assessments are included in the count
    // the maxeditingtime is NOT taken into account here 
    
    $n = 0;
    $timenow = time();
    if ($assessments = workshop_get_user_assessments($workshop, $user)) {
         foreach ($assessments as $assessment) {
            if ($assessment->timecreated < $timenow) {
                $n++;
                }
            }
        }
    return $n;
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_count_user_submissions($workshop, $user) {
    // returns the number of (real) submissions make by this user
    return count_records_select("workshop_submissions", "workshopid = $workshop->id AND 
        userid = $user->id AND timecreated > 0");
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_delete_submitted_files($workshop, $submission) {
// Deletes the files in the workshop area for this submission

    if ($basedir = workshop_file_area($workshop, $submission)) {
        if ($files = get_directory_list($basedir)) {
            foreach ($files as $file) {
                if (unlink("$basedir/$file")) {
                    notify("Existing file '$file' has been deleted!");
                    }
                else {
                    notify("Attempt to delete file $basedir/$file has failed!");
                    }
                }
            }
        }
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_delete_user_files($workshop, $user, $exception) {
// Deletes all the user files in the workshop area for a user
// EXCEPT for any file named $exception

    if (!$submissions = workshop_get_submissions($workshop, $user)) {
        notify("No submissions!");
        return;
        }
    foreach ($submissions as $submission) {
        if ($basedir = workshop_file_area($workshop, $submission)) {
            if ($files = get_directory_list($basedir)) {
                foreach ($files as $file) {
                    if ($file != $exception) {
                        unlink("$basedir/$file");
                        notify("Existing file '$file' has been deleted!");
                        }
                    }
                }
            }
        }
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_all_teacher_assessments($workshop) {
// Return all teacher assessments, ordered by timecreated, oldest first
    global $CFG;
    if (!$teachers = workshop_get_teachers($workshop)) {
        return false;
    }
    $list = "(";
    foreach ($teachers as $teacher) {
        $list .= "$teacher->id,";
    }
    $list = rtrim($list, ',').")";
    
    return get_records_sql("SELECT a.* FROM {$CFG->prefix}workshop_assessments a
                            WHERE a.userid IN $list
                              AND a.workshopid = $workshop->id 
                            ORDER BY a.timecreated");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_comments($assessment) {
    // Return all comments for this assessment provided they are newer than the assessment, 
    // and ordered oldest first, newest last
   return get_records_select("workshop_comments", "(assessmentid = $assessment->id) AND 
        timecreated > $assessment->timecreated",
        "timecreated DESC");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_student_assessments($workshop, $user) {
// Return all assessments on the student submissions by a user, order by youngest first, oldest last
    global $CFG;

    if (!workshop_is_student($workshop, $user->id)) {
        return false;
    }

    return get_records_sql("SELECT a.* FROM {$CFG->prefix}workshop_submissions s, {$CFG->prefix}workshop_assessments a
                            WHERE s.workshopid = $workshop->id
                              AND a.submissionid = s.id
                              AND a.userid = $user->id
                            ORDER BY a.timecreated DESC");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_student_submission_assessments($workshop) {
// Return all assessments on the student submissions, order by youngest first, oldest last
    global $CFG;


    if (!$students = workshop_get_students($workshop)) {
        return false;
    }
    $list = "(";
    foreach ($students as $student) {
        $list .= "$student->id,";
    }
    $list = rtrim($list, ',').")";

    return get_records_sql("SELECT a.* FROM {$CFG->prefix}workshop_submissions s, {$CFG->prefix}workshop_assessments a
                            WHERE s.userid IN $list
                              AND s.workshopid = $workshop->id
                              AND a.submissionid = s.id
                              ORDER BY a.timecreated DESC");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_submission_assessment($submission, $user) {
    // Return the user's assessment for this submission (cold or warm, not hot)
    
    $timenow = time();
    return get_record_select("workshop_assessments", "submissionid = $submission->id AND 
            userid = $user->id AND timecreated < $timenow");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_teacher_assessments($courseid, $submission) {
// Return teacher assessments of a submission, ordered by timecreated, oldest first
    global $CFG;
    
    if (!$teachers = workshop_get_teachers($submission->workshopid)) {
        return false;
    }
    $list = "(";
    foreach ($teachers as $teacher) {
        $list .= "$teacher->id,";
    }
    $list = rtrim($list, ',').")";
    return get_records_sql("SELECT a.* FROM {$CFG->prefix}workshop_assessments a
                            WHERE a.userid IN $list
                              AND a.submissionid = $submission->id 
                            ORDER BY a.timecreated");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_teacher_submission_assessments($workshop) {
// Return all assessments on the teacher submissions, order by youngest first, oldest last
    global $CFG;
    
    if (!$teachers = workshop_get_teachers($workshop)) {
        return false;
    }
    $list = "(";
    foreach ($teachers as $teacher) {
        $list .= "$teacher->id,";
    }
    $list = rtrim($list, ',').")";
    return get_records_sql("SELECT a.* FROM {$CFG->prefix}workshop_submissions s, {$CFG->prefix}workshop_assessments a
                            WHERE s.userid IN $list
                              AND s.workshopid = $workshop->id
                              AND a.submissionid = s.id
                            ORDER BY a.timecreated DESC");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_teacher_submissions($workshop) {
// Return all  teacher submissions, ordered by title
    global $CFG;
    
    if (!$teachers = workshop_get_teachers($workshop)) {
        return false;
    }
    $list = "(";
    foreach ($teachers as $teacher) {
        $list .= "$teacher->id,";
    }
    $list = rtrim($list, ',').")";
    return get_records_sql("SELECT s.* FROM {$CFG->prefix}workshop_submissions s
                            WHERE s.userid IN $list
                              AND s.workshopid = $workshop->id 
                            ORDER BY s.title");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_ungraded_assessments($workshop) {
    global $CFG;
    // Return all assessments which have not been graded or just graded
    $cutofftime = time() - $CFG->maxeditingtime;
    return get_records_select("workshop_assessments", "workshopid = $workshop->id AND (timegraded = 0 OR 
                timegraded > $cutofftime)", "timecreated"); 
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_ungraded_assessments_student($workshop) {
    global $CFG;
    // Return all assessments which have not been graded or just graded of student's submissions

    $cutofftime = time() - $CFG->maxeditingtime;

    if (!$students = workshop_get_students($workshop)) {
        return false;
    }
    $list = "(";
    foreach ($students as $student) {
        $list .= "$student->id,";
    }
    $list = rtrim($list, ',').")";
    return get_records_sql("SELECT a.* FROM {$CFG->prefix}workshop_submissions s, {$CFG->prefix}workshop_assessments a
                            WHERE s.userid IN $list
                              AND s.workshopid = $workshop->id
                              AND a.submissionid = s.id
                              AND (a.timegraded = 0 OR a.timegraded > $cutofftime)
                              AND a.timecreated < $cutofftime
                              ORDER BY a.timecreated ASC"); 
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_ungraded_assessments_teacher($workshop) {
    global $CFG;
    // Return all assessments which have not been graded or just graded of teacher's submissions
    
    $cutofftime =time() - $CFG->maxeditingtime;
    if (!$teachers = workshop_get_teachers($workshop)) {
        return false;
    }
    $list = "(";
    foreach ($teachers as $teacher) {
        $list .= "$teacher->id,";
    }
    $list = rtrim($list, ',').")";
    return get_records_sql("SELECT a.* FROM {$CFG->prefix}workshop_submissions s, {$CFG->prefix}workshop_assessments a
                            WHERE s.userid IN $list
                              AND s.workshopid = $workshop->id
                              AND a.submissionid = s.id
                              AND (a.timegraded = 0 OR a.timegraded > $cutofftime)
                              AND a.timecreated < $cutofftime
                              ORDER BY a.timecreated ASC"); 
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_user_assessments_done($workshop, $user) {
// Return all the  user's assessments, oldest first, newest last (warm and cold ones only)
// ignores maxeditingtime
    $timenow = time();
    return get_records_select("workshop_assessments", "workshopid = $workshop->id AND userid = $user->id
                AND timecreated < $timenow", 
                "timecreated ASC");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_get_users_done($workshop) {
    global $CFG;

    // make sure it works on the site course
    $select = "s.course = '$workshop->course' AND";
    if ($workshop->course == SITEID) {
        $select = '';
    }

    if (!$students = workshop_get_students($workshop)) {
        return false;
    }
    $list = "(";
    foreach ($students as $student) {
        $list .= "$student->id,";
    }
    $list = rtrim($list, ',').")";

    return get_records_sql("SELECT u.* FROM {$CFG->prefix}user u, {$CFG->prefix}workshop_submissions a
                            WHERE $select u.user IN $list
                              AND u.id = a.user AND a.workshop = '$workshop->id'
                            ORDER BY a.timemodified DESC");
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_all_submissions($workshop, $user) {
    // list the teacher sublmissions first
    global $CFG;
    
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
        }
    $table->head = array (get_string("title", "workshop"), get_string("action", "workshop"), 
                        get_string("comment", "workshop"));
    $table->align = array ("left", "left", "left");
    $table->size = array ("*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    if ($submissions = workshop_get_teacher_submissions($workshop)) {
        foreach ($submissions as $submission) {
            if ($submission->userid == $user->id) {
                $comment = get_string("ownwork", "workshop")."; ";
                }
            else {
                $comment = "";
                }
            // has user already assessed this submission
            if ($assessment = get_record_select("workshop_assessments", "submissionid = $submission->id
                    AND userid = $user->id")) {
                $curtime = time();
                if (($curtime - $assessment->timecreated) > $CFG->maxeditingtime) {
                    $action = "<a href=\"viewassessment.php?id=$cm->id&amp;aid=$assessment->id\">"
                        .get_string("view", "workshop")."</a>";
                    // has teacher graded user's assessment?
                    if ($assessment->timegraded) {
                        if (($curtime - $assessment->timegraded) > $CFG->maxeditingtime) {
                            $comment .= get_string("gradedbyteacher", "workshop", $course->teacher);
                            }
                        }
                    }
                else { // there's still time left to edit...
                    $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("edit", "workshop")."</a>";
                    }
                }
            else { // user has not graded this submission
                $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                    get_string("assess", "workshop")."</a>";
                }
            $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, 
                                $comment);
            }
        print_table($table);
        }

    echo "<div style=\"text-align:center;\"><p><b>".get_string("studentsubmissions", "workshop", $course->student).
        "</b></div><br />\n";
    unset($table);
    $table->head = array (get_string("title", "workshop"), get_string("action", "workshop"), 
                        get_string("comment", "workshop"));
    $table->align = array ("left", "left", "left");
    $table->size = array ("*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    if ($submissions = workshop_get_student_submissions($workshop)) {
        foreach ($submissions as $submission) {
            if ($submission->userid == $user->id) {
                $comment = get_string("ownwork", "workshop")."; ";
                }
            else {
                $comment = "";
                }
            // has user already assessed this submission
            if ($assessment = get_record_select("workshop_assessments", "submissionid = $submission->id
                    AND userid = $user->id")) {
                $curtime = time();
                if (($curtime - $assessment->timecreated) > $CFG->maxeditingtime) {
                    $action = "<a href=\"viewassessment.php?id=$cm->id&amp;aid=$assessment->id\">".
                        get_string("view", "workshop")."</a>";
                    // has teacher graded on user's assessment?
                    if ($assessment->timegraded) {
                        if (($curtime - $assessment->timegraded) > $CFG->maxeditingtime) {
                            $comment .= get_string("gradedbyteacher", "workshop", $course->teacher)."; ";
                            }
                        }
                    $otherassessments = workshop_get_assessments($submission);
                    if (count($otherassessments) > 1) {
                        $comment .= "<a href=\"assessments.php?action=viewallassessments&amp;id=$cm->id&amp;sid=$submission->id\">".
                        get_string("viewotherassessments", "workshop")."</a>";
                        }
                    }
                else { // there's still time left to edit...
                    $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("edit", "workshop")."</a>";
                    }
                }
            else { // user has not assessed this submission
                $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                    get_string("assess", "workshop")."</a>";
                }
            $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, 
                                $comment);
            }
        print_table($table);
        }
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_all_ungraded_assessments($workshop) {
    // lists all the assessments for comment by teacher
    global $CFG;

    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    
    $table->head = array (get_string("title", "workshop"), get_string("timeassessed", "workshop"), get_string("action", "workshop"));
    $table->align = array ("left", "left", "left");
    $table->size = array ("*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;
    $timenow = time();
    
    if ($assessments = workshop_get_ungraded_assessments($workshop)) {
        foreach ($assessments as $assessment) {
            if (!workshop_is_teacher($workshop, $assessment->userid)) {
                if (($timenow - $assessment->timegraded) < $CFG->maxeditingtime) {
                    $action = "<a href=\"viewassessment.php?&amp;id=$cm->id&amp;aid=$assessment->id\">".
                        get_string("edit", "workshop")."</a>";
                    }
                else {
                    $action = "<a href=\"viewassessment.php?&amp;id=$cm->id&amp;aid=$assessment->id\">".
                        get_string("gradeassessment", "workshop")."</a>";
                    }
                $submission = get_record("workshop_submissions", "id", $assessment->submissionid);
                $table->data[] = array(workshop_print_submission_title($workshop, $submission), 
                    userdate($assessment->timecreated), $action);
                }
            }
        if (isset($table->data)) {
            print_table($table);
            }
        }
    }
    

//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_assessed_submissions($workshop, $user) {
    // list the submissions that have been assessed by this user and are COLD
    global $CFG, $USER;
    
    $timenow = time();
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
        }
    $table->head = array (get_string("title","workshop"), get_string("action","workshop"), 
                    get_string("comment","workshop"));
    $table->align = array ("left", "left", "left");
    $table->size = array ("*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    if ($assessments = workshop_get_student_assessments($workshop, $user)) {
        foreach ($assessments as $assessment) {
            $comment = "";
            $submission = get_record("workshop_submissions", "id", $assessment->submissionid);
            // the assessment may be in three states: 
            // 1. "hot", just created but not completed (timecreated is in the future)
            // 2. "warm" just created and still capable of being edited, and 
            // 3. "cold" after the editing time
                
            if ($assessment->timecreated < ($timenow - $CFG->maxeditingtime)) { // it's cold
                if ($workshop->agreeassessments) {
                    if (!$assessment->timeagreed) {
                        $action = "<a href=\"viewassessment.php?id=$cm->id&amp;aid=$assessment->id&".
                            "allowcomments=$workshop->agreeassessments\">".
                            get_string("view", "workshop")."</a>";
                        $action .= " | <a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                            get_string("reassess", "workshop")."</a>";
                    } else {
                        $action = "<a href=\"viewassessment.php?id=$cm->id&amp;aid=$assessment->id&".
                            "allowcomments=false\">".get_string("view", "workshop")."</a>";
                    }
                } else {
                    // if it been graded allow student to re-assess, except if it's a self assessment
                    if ($assessment->timegraded and !($USER->id == $assessment->userid)) {
                        $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                            get_string("reassess", "workshop")."</a>";
                    } else {
                        $action = "<a href=\"viewassessment.php?id=$cm->id&amp;aid=$assessment->id\">".
                            get_string("view", "workshop")."</a>";
                    }
                }          
                if ($assessment->timecreated < $timenow) { // only show the date if it's in the past (future dates cause confusion)
                    $comment = get_string("assessedon", "workshop", userdate($assessment->timecreated));
                }
                else {
                    $comment = '';
                }
                if ($submission->userid == $user->id) { // self assessment?
                    $comment .= "; ".get_string("ownwork", "workshop"); // just in case they don't know!
                }
                // has assessment been graded?
                if ($assessment->timegraded and ($timenow - $assessment->timegraded > $CFG->maxeditingtime)) {
                    if ($workshop->gradingstrategy) { // supress grading grade if not graded
                        $comment .= "; ".get_string("thegradeforthisassessmentis", "workshop", 
                            number_format($assessment->gradinggrade * $workshop->gradinggrade / 100, 0)).
                            " / $workshop->gradinggrade";
                    }
                }
                // if peer agreements show whether agreement has been reached
                if ($workshop->agreeassessments) {
                    if ($assessment->timeagreed) {
                        $comment .= "; ".get_string("assessmentwasagreedon", "workshop", 
                                userdate($assessment->timeagreed));
                    }
                    else {
                        $comment .= "; ".get_string("assessmentnotyetagreed", "workshop");
                    }
                }
                $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, 
                                    $comment);
            }
        }
    }
    if (isset($table->data)) {
        print_table($table);
    }
    else {
        echo "<div style=\"text-align:center;\">".get_string("noassessmentsdone", "workshop")."</div>\n";
    }
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_peer_assessments($workshop, $user) {
    global $CFG;
    
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
        }
    $table->head = array (get_string("title", "workshop"), get_string("action", "workshop"), 
                    get_string("comment", "workshop"));
    $table->align = array ("left", "left", "left");
    $table->size = array ("*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    // get user's submissions
    if ($submissions = workshop_get_user_submissions($workshop, $user)) {
        foreach ($submissions as $submission) {
            // get the assessments
            if ($assessments = workshop_get_assessments($submission)) {
                foreach ($assessments as $assessment) {
                    // assessments by students only and exclude any self assessments
                    if (workshop_is_student($workshop, $assessment->userid) and 
                            ($assessment->userid != $user->id)) { 
                        $timenow = time();
                        if (($timenow - $assessment->timecreated) > $CFG->maxeditingtime) {
                            $action = "<a href=\"viewassessment.php?id=$cm->id&amp;aid=$assessment->id&".
                                "allowcomments=$workshop->agreeassessments\">".
                                get_string("view", "workshop")."</a>";
                            $comment = get_string("assessedon", "workshop", userdate($assessment->timecreated));
                            $grade = number_format($assessment->grade * $workshop->grade / 100, 1);
                            if ($workshop->gradingstrategy) { // supress grade if not graded
                                $comment .= "; ".get_string("gradeforsubmission", "workshop").
                                    ": $grade / $workshop->grade"; 
                            }
                            if ($assessment->timegraded) {
                                if (!$assessment->gradinggrade) {
                                    // it's a bad assessment
                                    $comment .= "; ".get_string("thisisadroppedassessment", "workshop");
                                }
                            }
                            if (workshop_is_teacher($workshop, $assessment->userid) and $workshop->teacherweight) {
                                $comment .= "; ".get_string("thisisadroppedassessment", "workshop");
                            }
                            // if peer agreements show whether agreement has been reached
                            if ($workshop->agreeassessments) {
                                if ($assessment->timeagreed) {
                                    $comment .= "; ".get_string("assessmentwasagreedon", "workshop", 
                                                        userdate($assessment->timeagreed));
                                    }
                                else {
                                    $comment .= "; ".get_string("assessmentnotyetagreed", "workshop");
                                    }
                                }
                            $table->data[] = array(workshop_print_submission_title($workshop, $submission), 
                                                $action, $comment);
                            }
                        }
                    }
                }
            }
        }
    if (isset($table->data)) {
        print_table($table);
        }
    else {
        echo "<div style=\"text-align:center;\">".get_string("noassessmentsdone", "workshop")."</div>\n";
        }
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_self_assessments($workshop, $user) {
    // list  user's submissions for the user to assess
    global $CFG;
    
    $timenow = time();
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
        }
    $table->head = array (get_string("title", "workshop"), get_string("action", "workshop"), 
                       get_string("comment", "workshop"));
    $table->align = array ("left", "left", "left");
    $table->size = array ("*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    // get the user's submissions 
    if ($submissions = workshop_get_user_submissions($workshop, $user)) {
        foreach ($submissions as $submission) {
            $comment = get_string("ownwork", "workshop"); // just in case they don't know!
            if (!$assessment = get_record_select("workshop_assessments", "submissionid = $submission->id AND
                    userid = $user->id")) {
                $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                    get_string("assess", "workshop")."</a>";
                $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, $comment);
            } else {
                // may still be warm
                if (($assessment->timecreated + $CFG->maxeditingtime) > $timenow) {
                    $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("reassess", "workshop")."</a>";
                    $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, $comment);
                }
            }
        
        }
    }
    if (isset($table->data)) {
        echo "<p><div style=\"text-align:center;\"><b>".get_string("pleaseassessyoursubmissions", "workshop", $course->student).
            "</b></div><br />\n";
        print_table($table);
    }
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_student_submissions($workshop, $user) {
    // list available submissions for this user to assess, submissions with the least number 
    // of assessments are show first
    global $CFG;
    
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
        }

    $timenow = time();

    // set student's group if workshop is in SEPARATEGROUPS mode
    if (groupmode($course, $cm) == SEPARATEGROUPS) {
        $groupid = get_current_group($course->id);
    } else {
        $groupid = 0;
    }
    
    $table->head = array (get_string("title", "workshop"), get_string("action", "workshop"), get_string("comment", "workshop"));
    $table->align = array ("left", "left", "left");
    $table->size = array ("*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    // get the number of assessments this user has done on student submission, deduct self assessments
    $nassessed = workshop_count_user_assessments($workshop, $user, "student") - 
        workshop_count_self_assessments($workshop, $user);
    // user hasn't been allocated enough, try and get some more
    if ($nassessed < $workshop->nsassessments) {
        // count the number of assessments for each student submission
        if ($submissions = workshop_get_student_submissions($workshop)) {
            // srand ((float)microtime()*1000000); // now done automatically in PHP 4.2.0->
            foreach ($submissions as $submission) {
                // check group membership, if necessary
                if ($groupid) {
                    // check user's group
                    if (!groups_is_member($groupid, $submission->userid)) {
                        continue; // skip this submission
                  }
                }
                // process only cold submissions
                if (($submission->timecreated + $CFG->maxeditingtime) > $timenow) {
                    continue;
                }
                $n = count_records("workshop_assessments", "submissionid", $submission->id);
                // ...OK to have zero, we add a small random number to randomise things
                $nassessments[$submission->id] = $n + rand(0, 98) / 100;
                }
                
            if (isset($nassessments)) { // make sure we end up with something to play with
                // put the submissions with the lowest number of assessments first
                asort($nassessments);
                reset($nassessments);
                $nsassessments = $workshop->nsassessments;
                foreach ($nassessments as $submissionid =>$n) {
                    // only use those submissions which fall below the allocation threshold
                    if ($n < ($workshop->nsassessments + $workshop->overallocation)) {
                        $comment = "";
                        $submission = get_record("workshop_submissions", "id", $submissionid);
                        // skip submission if it belongs to this user
                        if ($submission->userid != $user->id) {
                            // add a "hot" assessment record if user has NOT already assessed this submission
                            if (!get_record("workshop_assessments", "submissionid", $submission->id, "userid",
                                        $user->id)) {
                                $yearfromnow = time() + 365 * 86400;
                                // ...create one and set timecreated way in the future, this is reset when record is updated
                                unset($assessment); // clear previous version object (if any)
                                $assessment->workshopid = $workshop->id;
                                $assessment->submissionid = $submission->id;
                                $assessment->userid = $user->id;
                                $assessment->grade = -1; // set impossible grade
                                $assessment->timecreated = $yearfromnow;
                                $assessment->generalcomment = '';
                                $assessment->teachercomment = '';
                                if (!$assessment->id = insert_record("workshop_assessments", $assessment)) {
                                    error("List Student submissions: Could not insert workshop assessment!");
                                }
                                $nassessed++;
                                // is user up to quota?
                                if ($nassessed == $nsassessments) {
                                    break;
                                }
                            }
                        }
                    }
                }
            }
        }
    }
    // now list the student submissions this user has been allocated, list only the hot and warm ones, 
    // the cold ones are listed in the "your assessments list" (_list_assessed submissions)
    if ($assessments = workshop_get_user_assessments($workshop, $user)) {
        $timenow = time();
        foreach ($assessments as $assessment) {
            if (!$submission = get_record("workshop_submissions", "id", $assessment->submissionid)) {
                error ("workshop_list_student_submissions: unable to get submission");
                }
            // submission from a student?
            if (workshop_is_student($workshop, $submission->userid)) {
                $comment = '';
                // user assessment has three states: record created but not assessed (date created in the future) [hot]; 
                // just assessed but still editable [warm]; and "static" (may or may not have been graded by teacher, that
                // is shown in the comment) [cold] 
                if ($assessment->timecreated > $timenow) { // user needs to assess this submission
                    $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("assess", "workshop")."</a>";
                    $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, $comment);
                    }
                elseif ($assessment->timecreated > ($timenow - $CFG->maxeditingtime)) { // there's still time left to edit...
                    $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("edit", "workshop")."</a>";
                    $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, $comment);
                    }
                }
            }
        }
    
    if (isset($table->data)) {
        echo "<p><div style=\"text-align:center;\"><b>".get_string("pleaseassessthesestudentsubmissions", "workshop", $course->student).
            "</b></div><br />\n";
        print_table($table);
        }
    else {
        echo "<p><div style=\"text-align:center;\"><b>".get_string("nosubmissionsavailableforassessment", "workshop")."</b></div><br />\n";
        }
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_submissions_for_admin($workshop, $order) {
    // list the teacher sublmissions first
    global $CFG, $USER;
    
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
        }
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $course->id)) {
        error("Course Module ID was incorrect");
    }
    if (groupmode($course, $cm) == SEPARATEGROUPS) {
        $groupid = get_current_group($course->id);
    } else {
        $groupid = 0;
    }
    
    workshop_print_assignment_info($workshop);

    if (workshop_is_teacheredit($workshop)) {
        // list any teacher submissions
        $table->head = array (get_string("title", "workshop"), get_string("submittedby", "workshop"), 
                get_string("action", "workshop"));
        $table->align = array ("left", "left", "left");
        $table->size = array ("*", "*", "*");
        $table->cellpadding = 2;
        $table->cellspacing = 0;

        if ($submissions = workshop_get_teacher_submissions($workshop)) {
            foreach ($submissions as $submission) {
                $action = "<a href=\"submissions.php?action=adminamendtitle&amp;id=$cm->id&amp;sid=$submission->id\">".
                    get_string("amendtitle", "workshop")."</a>";
                // has user already assessed this submission
                if ($assessment = get_record_select("workshop_assessments", "submissionid = $submission->id
                            AND userid = $USER->id")) {
                    $curtime = time();
                if ($assessment->timecreated > $curtime) { // it's a "hanging" assessment 
                    $action .= " | <a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("assess", "workshop")."</a>";
                }
                elseif (($curtime - $assessment->timecreated) > $CFG->maxeditingtime) {
                    $action .= " | <a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">"
                        .get_string("reassess", "workshop")."</a>";
                }
                else { // there's still time left to edit...
                    $action .= " | <a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("edit", "workshop")."</a>";
                }
            }
                else { // user has not graded this submission
                    $action .= " | <a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("assess", "workshop")."</a>";
                }
                if ($assessments = workshop_get_assessments($submission)) {
                    $action .= " | <a href=\"assessments.php?action=adminlist&amp;id=$cm->id&amp;sid=$submission->id\">".
                        get_string("listassessments", "workshop")."</a>";
                }
                if (workshop_is_teacheredit($workshop)) {
                    $action .= " | <a href=\"submissions.php?action=confirmdelete&amp;id=$cm->id&amp;sid=$submission->id\">".
                        get_string("delete", "workshop")."</a>";
                }
                $table->data[] = array("<a href=\"submissions.php?action=editsubmission&amp;id=$cm->id&amp;sid=$submission->id\">$submission->title</a>", $course->teacher, $action);
            }
            print_heading(get_string("studentsubmissions", "workshop", $course->teacher), "center");
            print_table($table);
        }
    }

    // list student assessments
    // Get all the students...
    if ($users = workshop_get_students($workshop, "u.lastname, u.firstname")) {
        $timenow = time();
        unset($table);
        $table->head = array(get_string("name"), get_string("title", "workshop"), get_string("action", "workshop"));
        $table->align = array ("left", "left", "left");
        $table->size = array ("*", "*", "*");
        $table->cellpadding = 2;
        $table->cellspacing = 0;
        $nassessments = 0;
        foreach ($users as $user) {
            // check group membership, if necessary
            if ($groupid) {
                // check user's group
                if (!groups_is_member($groupid, $user->id)) {
                    continue; // skip this user
                }
            }
            // list the assessments which have been done (exclude the hot ones)
            if ($assessments = workshop_get_user_assessments_done($workshop, $user)) {
                $title ='';
                foreach ($assessments as $assessment) {
                    if (!$submission = get_record("workshop_submissions", "id", $assessment->submissionid)) {
                        error("Workshop_list_submissions_for_admin: Submission $assessment->submissionid not found!");
                    }
                    $title .= $submission->title;
                    if ($workshop->agreeassessments and !$assessment->timeagreed and 
                            workshop_is_student($workshop, $submission->userid)) { // agreements for student work only
                        $title .= " &lt;&lt;".number_format($assessment->grade * $workshop->grade / 100, 0)." (".
                            number_format($assessment->gradinggrade * $workshop->gradinggrade / 100, 0).")&gt;&gt; ";
                    } elseif ($assessment->timegraded) {
                        if ($assessment->gradinggrade) {
                            // a good assessment
                            $title .= " {".number_format($assessment->grade * $workshop->grade / 100, 0)." (".
                                number_format($assessment->gradinggrade * $workshop->gradinggrade / 100, 0).")} ";
                        } else { 
                            // a poor assessment
                            $title .= " &lt;".number_format($assessment->grade * $workshop->grade / 100, 0)." (".
                                number_format($assessment->gradinggrade * $workshop->gradinggrade / 100, 0).")&gt; ";
                        }
                    } else {
                        // not yet graded
                        $title .= " {".number_format($assessment->grade * $workshop->grade / 100, 0)." ((".
                            number_format($assessment->gradinggrade * $workshop->gradinggrade / 100, 0)."))} ";
                    }
                    if ($realassessments = workshop_count_user_assessments_done($workshop, $user)) {
                        $action = "<a href=\"assessments.php?action=adminlistbystudent&amp;id=$cm->id&amp;userid=$user->id\">".
                            get_string("liststudentsassessments", "workshop")." ($realassessments)</a>";
                    } else {
                        $action ="";
                    }
                }
                $nassessments++;
                $table->data[] = array(fullname($user), $title, $action);
            }
        }
        if (isset($table->data)) {
            print_heading(get_string("studentassessments", "workshop", $course->student)." [$nassessments]");
            print_table($table);
            workshop_print_key($workshop);
            // grading grade analysis
            unset($table);
            $table->head = array (get_string("count", "workshop"), get_string("mean", "workshop"),
                get_string("standarddeviation", "workshop"), get_string("maximum", "workshop"), 
                get_string("minimum", "workshop"));
            $table->align = array ("center", "center", "center", "center", "center");
            $table->size = array ("*", "*", "*", "*", "*");
            $table->cellpadding = 2;
            $table->cellspacing = 0;
            if ($groupid) {
                $stats = get_record_sql("SELECT COUNT(*) as count, AVG(gradinggrade) AS mean, 
                        STDDEV(gradinggrade) AS stddev, MIN(gradinggrade) AS min, MAX(gradinggrade) AS max 
                        FROM {$CFG->prefix}groups_members g, {$CFG->prefix}workshop_assessments a 
                        WHERE g.groupid = $groupid AND a.userid = g.userid AND a.timegraded > 0 
                        AND a.workshopid = $workshop->id");
            } else { // no group/all participants
                $stats = get_record_sql("SELECT COUNT(*) as count, AVG(gradinggrade) AS mean, 
                        STDDEV(gradinggrade) AS stddev, MIN(gradinggrade) AS min, MAX(gradinggrade) AS max 
                        FROM {$CFG->prefix}workshop_assessments a 
                        WHERE a.timegraded > 0 AND a.workshopid = $workshop->id");
            }   
            $table->data[] = array($stats->count, number_format($stats->mean * $workshop->gradinggrade / 100, 1), 
                    number_format($stats->stddev * $workshop->gradinggrade /100, 1), 
                    number_format($stats->max * $workshop->gradinggrade / 100, 1), 
                    number_format($stats->min* $workshop->gradinggrade / 100, 1));
            print_heading(get_string("gradinggrade", "workshop")." ".get_string("analysis", "workshop"));
            print_table($table);
            echo "<p style=\"text-align:center\"><a href=\"assessments.php?id=$cm->id&amp;action=regradestudentassessments\">".
                    get_string("regradestudentassessments", "workshop")."</a> ";
            helpbutton("regrading", get_string("regradestudentassessments", "workshop"), "workshop");
            echo "</p>\n";
        }
    }

    // now the sudent submissions
    unset($table);
    switch ($order) {
        case "title" :
            $table->head = array("<a href=\"submissions.php?action=adminlist&amp;id=$cm->id&amp;order=name\">".
                 get_string("submittedby", "workshop")."</a>", get_string("title", "workshop"), 
                 get_string("submitted", "workshop"), get_string("action", "workshop"));
            break;
        case "name" :
            $table->head = array (get_string("submittedby", "workshop"), 
                "<a href=\"submissions.php?action=adminlist&amp;id=$cm->id&amp;order=title\">".
                get_string("title", "workshop")."</a>", get_string("submitted", "workshop"), 
                get_string("action", "workshop"));
            break;
    }
    $table->align = array ("left", "left", "left", "left");
    $table->size = array ("*", "*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;
    
    $nsubmissions = 0;
    if ($submissions = workshop_get_student_submissions($workshop, $order)) {
        foreach ($submissions as $submission) {
            if (!$user = get_record("user", "id", $submission->userid)) {
                error("workshop_list_submissions_for_admin: failure to get user record");
            }
            // check group membership, if necessary
            if ($groupid) {
                // check user's group
                if (!groups_is_member($groupid, $user->id)) {
                    continue; // skip this user
                }
            }
            $datesubmitted = userdate($submission->timecreated);
            if ($submission->late) {
                $datesubmitted = "<span class=\"redfont\">".$datesubmitted."</span>";
            }
            $action = "<a href=\"submissions.php?action=adminamendtitle&amp;id=$cm->id&amp;sid=$submission->id\">".
                get_string("amendtitle", "workshop")."</a>";
            // has teacher already assessed this submission
            if ($assessment = get_record_select("workshop_assessments", "submissionid = $submission->id
                    AND userid = $USER->id")) {
                $curtime = time();
                if (($curtime - $assessment->timecreated) > $CFG->maxeditingtime) {
                    $action .= " | <a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("reassess", "workshop")."</a>";
                }
                else { // there's still time left to edit...
                    $action .= " | <a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("edit", "workshop")."</a>";
                }
            }
            else { // user has not assessed this submission
                $action .= " | <a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                    get_string("assess", "workshop")."</a>";
            }
            if ($nassessments = workshop_count_assessments($submission)) {
                $action .= " | <a href=\"assessments.php?action=adminlist&amp;id=$cm->id&amp;sid=$submission->id\">".
                    get_string("listassessments", "workshop")." ($nassessments)</a>";
            }
            if ($submission->late) {
                $action .= " | <a href=\"submissions.php?action=adminlateflag&amp;id=$cm->id&amp;sid=$submission->id\">".
                    get_string("clearlateflag", "workshop")."</a>";
            }
            $action .= " | <a href=\"submissions.php?action=confirmdelete&amp;id=$cm->id&amp;sid=$submission->id\">".
                get_string("delete", "workshop")."</a>";
            $nsubmissions++;
            $table->data[] = array("$user->firstname $user->lastname", $submission->title.
                " (".get_string("grade").": ".workshop_submission_grade($workshop, $submission)." ".
                workshop_print_submission_assessments($workshop, $submission, "teacher").
                " ".workshop_print_submission_assessments($workshop, $submission, "student").")", $datesubmitted, 
                $action);
        }
        print_heading(get_string("studentsubmissions", "workshop", $course->student)." [$nsubmissions]", "center");
        print_table($table);
        workshop_print_key($workshop);
    }
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_teacher_assessments_by_user($workshop, $user) {
    global $CFG;
    
    $timenow = time();
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
    }

    $table->head = array (get_string("title", "workshop"), get_string("action", "workshop"), get_string("comment", "workshop"));
    $table->align = array ("left", "left", "left");
    $table->size = array ("*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    // get user's submissions
    if ($submissions = workshop_get_user_submissions($workshop, $user)) {
        foreach ($submissions as $submission) {
            // get the assessments
            if ($assessments = workshop_get_assessments($submission)) {
                foreach ($assessments as $assessment) {
                    if (workshop_is_teacher($workshop, $assessment->userid)) { // assessments by teachers only
                        $action = "<a href=\"viewassessment.php?id=$cm->id&amp;aid=$assessment->id\">".
                            get_string("view", "workshop")."</a>";
                        // has teacher commented on teacher's assessment? shouldn't happen but leave test in
                        if ($assessment->timegraded and ($timenow - $assessment->timegraded > $CFG->maxeditingtime)) {
                            $comment = get_string("gradedbyteacher", "workshop", $course->teacher);
                            }
                        else {
                            $comment = userdate($assessment->timecreated);
                            }
                        $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, $comment);
                        }
                    }
                }
            }
        }
    if (isset($table->data)) {
        print_table($table);
        }
    else {
        echo "<div style=\"text-align:center;\">".get_string("noassessmentsdone", "workshop")."</div>\n";
        }
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_teacher_submissions($workshop, $user) {
    global $CFG;

    // set threshold on re-assessments
    $reassessthreshold = 80;
    
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
    }
    $table->head = array (get_string("title", "workshop"), get_string("action", "workshop"), get_string("comment", "workshop"));
    $table->align = array ("left", "left", "left");
    $table->size = array ("*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    // get the number of assessments this user has done
    $nassessed = count_records_select("workshop_assessments", "workshopid = $workshop->id
                    AND userid = $user->id");
    if ($nassessed < $workshop->ntassessments) { 
        // if user has not assessed enough, set up "future" assessment records for this user for the teacher submissions...
        // ... first count the number of assessments for each teacher submission...
        if ($submissions = workshop_get_teacher_submissions($workshop)) {
            srand ((float)microtime()*1000000); // initialise random number generator
            foreach ($submissions as $submission) {
                $n = count_records("workshop_assessments", "submissionid", $submission->id);
                // ...OK to have zero, we add a small random number to randomise things...
                $nassessments[$submission->id] = $n + rand(0, 99) / 100;
            }
            // ...put the submissions with the lowest number of assessments first...
            asort($nassessments);
            reset($nassessments);
            foreach ($nassessments as $submissionid => $n) { // break out of loop when we allocated enough assessments...
                $submission = get_record("workshop_submissions", "id", $submissionid);
                // ... provided the user has NOT already assessed that submission...
                if (!get_record("workshop_assessments", "submissionid", $submission->id, "userid",
                                    $user->id)) {
                    $yearfromnow = time() + 365 * 86400;
                    // ...create one and set timecreated way in the future, this is reset when record is updated
                    unset($assessment); // clear previous version of object (if any)
                    $assessment->workshopid = $workshop->id;
                    $assessment->submissionid = $submission->id;
                    $assessment->userid = $user->id;
                    $assessment->grade = -1; // set impossible grade
                    $assessment->timecreated = $yearfromnow;
                    $assessment->generalcomment = '';
                    $assessment->teachercomment = '';
                    if (!$assessment->id = insert_record("workshop_assessments", $assessment)) {
                        error("Could not insert workshop assessment!");
                    }
                    $nassessed++;
                    if ($nassessed >= $workshop->ntassessments) {
                        break;
                    }
                }
            }
        }
    }
    // now list user's assessments (but only list those which come from teacher submissions)
    if ($assessments = workshop_get_user_assessments($workshop, $user)) {
        $timenow = time();
        foreach ($assessments as $assessment) {
            if (!$submission = get_record("workshop_submissions", "id", $assessment->submissionid)) {
                error ("workshop_list_teacher_submissions: unable to get submission");
            }
            // submission from a teacher?
            if (workshop_is_teacher($workshop, $submission->userid)) {
                $comment = '';
                // user assessment has two states: record created but not assessed (date created in the future); 
                // assessed but always available for re-assessment 
                if ($assessment->timecreated > $timenow) { // user needs to assess this submission
                    $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("assess", "workshop")."</a>";
                }
                elseif ($assessment->timegraded and ($assessment->gradinggrade < $reassessthreshold)) { 
                    // allow student to improve on their assessment once it's been graded and is below threshold
                    $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("reassess", "workshop")."</a>";
                } else {
                    // allow student  just to see their assessment if it hasn't been graded (or above threshold)
                    $action = "<a href=\"viewassessment.php?id=$cm->id&amp;aid=$assessment->id\">".
                        get_string("view", "workshop")."</a>";
                }
                // see if the assessment is graded
                if ($assessment->timegraded) {
                    // show grading grade (supressed if workshop not graded)
                    if ($workshop->gradingstrategy) {
                        $comment = get_string("thegradeforthisassessmentis", "workshop", 
                            number_format($assessment->gradinggrade * $workshop->gradinggrade / 100, 1))." / ".
                            $workshop->gradinggrade;
                    }
                } elseif ($assessment->timecreated < $timenow) {
                    $comment = get_string("awaitinggradingbyteacher", "workshop", $course->teacher);
                }
                $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, $comment);
            }
        }
    }
    print_table($table);
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_unassessed_student_submissions($workshop, $user) {
    // list the student submissions not assessed by this user
    global $CFG;
    
    $timenow = time();
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
        }

    if (groupmode($course, $cm) == SEPARATEGROUPS) {
        $groupid = get_current_group($course->id);
    } else {
        $groupid = 0;
    }

    $table->head = array (get_string("title", "workshop"), get_string("submittedby", "workshop"),
        get_string("submitted", "workshop"), get_string("action", "workshop"), get_string("comment", "workshop"));
    $table->align = array ("left", "left", "left", "left", "left");
    $table->size = array ("*", "*", "*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    if ($submissions = workshop_get_student_submissions($workshop, 'time')) { // oldest first 
        foreach ($submissions as $submission) {
            // check group membership, if necessary
            if ($groupid) {
                // check user's group
                if (!groups_is_member($groupid, $submission->userid)) {
                    continue; // skip this user
                }
            }
            // see if submission is cold
            if (($submission->timecreated +$CFG->maxeditingtime) > $timenow) {
                continue; // skip this submission
            }
            $comment = "";
            $timegap = get_string("ago", "workshop", format_time($submission->timecreated - $timenow));
            // see if user already graded this assessment
            if ($assessment = get_record_select("workshop_assessments", "submissionid = $submission->id
                    AND userid = $user->id")) {
                if (($timenow - $assessment->timecreated < $CFG->maxeditingtime)) {
                    // last chance salon
                    $submissionowner = get_record("user", "id", $submission->userid);
                    $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("edit", "workshop")."</a>";
                    $table->data[] = array(workshop_print_submission_title($workshop, $submission), 
                        fullname($submissionowner), $timegap, $action, $comment);
                    }
                }
            else { 
                // no assessment by this user, if no other teacher has assessed submission then list it
                if (!workshop_count_teacher_assessments($course->id, $submission)) {
                    $submissionowner = get_record("user", "id", $submission->userid);
                    $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("assess", "workshop")."</a>";
                    $table->data[] = array(workshop_print_submission_title($workshop, $submission), 
                        fullname($submissionowner), $timegap, $action, $comment);
                }
                }
            }
        if (isset($table->data)) {
            print_table($table);
            }
        }
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_unassessed_teacher_submissions($workshop, $user) {
    // list the teacher submissions not assessed by this user
    global $CFG;
    
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }

    $table->head = array (get_string("title", "workshop"), get_string("action", "workshop"), 
            get_string("comment", "workshop"));
    $table->align = array ("left", "left", "left");
    $table->size = array ("*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    if ($submissions = workshop_get_teacher_submissions($workshop)) {
        foreach ($submissions as $submission) {
            $comment = "";
            // see if user already graded this assessment
            if ($assessment = get_record_select("workshop_assessments", "submissionid = $submission->id
                    AND userid = $user->id")) {
                $timenow = time();
                if (($timenow - $assessment->timecreated < $CFG->maxeditingtime)) {
                    // last chance salon
                    $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                        get_string("edit", "workshop")."</a>";
                    $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, $comment);
                    }
                }
            else { // no assessment
                $action = "<a href=\"assess.php?id=$cm->id&amp;sid=$submission->id\">".
                    get_string("assess", "workshop")."</a>";
                $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action, $comment);
                }
            }
        if (isset($table->data)) {
            print_table($table);
            }
        }
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_ungraded_assessments($workshop, $stype) {
    // lists all the assessments of student submissions for grading by teacher
    global $CFG;
    
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }

    $table->head = array (get_string("title", "workshop"), get_string("submittedby", "workshop"),
    get_string("assessor", "workshop"), get_string("timeassessed", "workshop"), get_string("action", "workshop"));
    $table->align = array ("left", "left", "left", "left");
    $table->size = array ("*", "*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;
    $timenow = time();
    
    switch ($stype) {
        case "student" :
            $assessments = workshop_get_ungraded_assessments_student($workshop);
            break;
        case "teacher" :
            $assessments = workshop_get_ungraded_assessments_teacher($workshop);
            break;
        }
    if ($assessments) {
        foreach ($assessments as $assessment) {
            if (!workshop_is_teacher($workshop, $assessment->userid)) { // don't let teacher grade their own assessments
                if (($timenow - $assessment->timegraded) < $CFG->maxeditingtime) {
                    $action = "<a href=\"viewassessment.php?&amp;id=$cm->id&amp;stype=$stype&amp;aid=$assessment->id\">".
                        get_string("edit", "workshop")."</a>";
                    }
                else {
                    $action = "<a href=\"viewassessment.php?&amp;id=$cm->id&amp;stype=$stype&amp;aid=$assessment->id\">".
                        get_string("grade", "workshop")."</a>";
                    }
                $submission = get_record("workshop_submissions", "id", $assessment->submissionid);
                $submissionowner = get_record("user", "id", $submission->userid);
                $assessor = get_record("user", "id", $assessment->userid);
                $table->data[] = array(workshop_print_submission_title($workshop, $submission), 
                    fullname($submissionowner), fullname($assessor), userdate($assessment->timecreated), $action);
                }
            }
        if (isset($table->data)) {
            print_table($table);
            }
        }
    }
    

//////////////////////////////////////////////////////////////////////////////////////
function workshop_list_user_submissions($workshop, $user) {
    global $CFG;

    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }

    $timenow = time();
    $table->head = array (get_string("title", "workshop"),  get_string("action", "workshop"),
        get_string("submitted", "assignment"),  get_string("assessments", "workshop"));
    $table->align = array ("left", "left", "left", "left");
    $table->size = array ("*", "*", "*", "*");
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    if ($submissions = workshop_get_user_submissions($workshop, $user)) {
        foreach ($submissions as $submission) {
            // allow user to edit or delete a submission if it's warm OR if assessment period has not started
            if (($submission->timecreated > ($timenow - $CFG->maxeditingtime)) or ($workshop->assessmentstart > time())) {
                $action = "<a href=\"submissions.php?action=editsubmission&amp;id=$cm->id&amp;sid=$submission->id\">".
                    get_string("edit", "workshop")."</a> | ".
                    "<a href=\"submissions.php?action=confirmdelete&amp;id=$cm->id&amp;sid=$submission->id\">".
                    get_string("delete", "workshop")."</a>";
            }
            else {
                $action = '';
            }
            $datesubmitted = userdate($submission->timecreated);
            if ($submission->late) {
                $datesubmitted = "<span class=\"redfont\">".$datesubmitted."</span>";
            }
            $n = count_records_select("workshop_assessments", "submissionid = $submission->id AND
                    timecreated < ($timenow - $CFG->maxeditingtime)");
            $table->data[] = array(workshop_print_submission_title($workshop, $submission), $action,
                $datesubmitted, $n);
        }
        print_table($table);
    }
}


///////////////////////////////////////////////////////////////////////////////
function workshop_phase($workshop, $style='') {
    $time = time();
    if ($time < $workshop->submissionstart) {
        return get_string('phase1'.$style, 'workshop');
    } 
    else if ($time < $workshop->submissionend) {
        if ($time < $workshop->assessmentstart) {
            return get_string('phase2'.$style, 'workshop');
        } else {
            return get_string('phase3'.$style, 'workshop');
        }
    } 
    else if ($time < $workshop->assessmentstart) {
        return  get_string('phase0'.$style, 'workshop');
    }
    else if ($time < $workshop->assessmentend) {
        return  get_string('phase4'.$style, 'workshop');
    }
    else {
        return  get_string('phase5'.$style, 'workshop');
    }    
    error('Something is wrong with the workshop dates');
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_assessment($workshop, $assessment = false, $allowchanges = false, 
    $showcommentlinks = false, $returnto = '') {
    // $allowchanges added 14/7/03. The form is inactive unless allowchanges = true
    // $returnto added 28/8/03. The page to go to after the assessment has been submitted
    global $CFG, $USER, $WORKSHOP_SCALES, $WORKSHOP_EWEIGHTS;
    
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
    }
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $course->id)) {
        error("Course Module ID was incorrect");
    }
    if ($assessment) {
        if (!$submission = get_record("workshop_submissions", "id", $assessment->submissionid)) {
            error ("Workshop_print_assessment: Submission record not found");
        }
        
        // removed target=\"submission\" as it does not validate
        // MDL-7861
        print_heading(get_string('assessmentof', 'workshop', 
            "<a href=\"submissions.php?id=$cm->id&amp;action=showsubmission&amp;sid=$submission->id\" >".
            $submission->title.'</a>'));
    }
    
    $timenow = time();

    // reset the internal flags
    if ($assessment) {
        $showgrades = false;
    }
    else { // if no assessment, i.e. specimen grade form always show grading scales
        $showgrades = true;
    }
    
    if ($assessment) {
        // set the internal flag if necessary
        if ($allowchanges or !$workshop->agreeassessments or !$workshop->hidegrades or 
                $assessment->timeagreed) {
            $showgrades = true;
        }
        
        echo "<div class=\"boxaligncenter\">\n";
    
        // see if this is a pre-filled assessment for a re-submission...
        if ($assessment->resubmission) {
            // ...and print an explaination
            print_heading(get_string("assessmentofresubmission", "workshop"));
        }
        
        // print agreement time if the workshop requires peer agreement
        if ($workshop->agreeassessments and $assessment->timeagreed) {
            echo "<p>".get_string("assessmentwasagreedon", "workshop", userdate($assessment->timeagreed));
        }

        // first print any comments on this assessment
        if ($comments = workshop_get_comments($assessment)) {
            echo "<table cellpadding=\"2\" border=\"1\">\n";
            $firstcomment = TRUE;
            foreach ($comments as $comment) {
                echo "<tr valign=\"top\"><td class=\"workshopassessmentheading\"><p><b>".
                    get_string("commentby","workshop")." ";
                if (workshop_is_teacher($workshop, $comment->userid)) {
                    echo $course->teacher;
                }
                elseif ($assessment->userid == $comment->userid) {
                    print_string("assessor", "workshop");
                }
                else {
                    print_string("authorofsubmission", "workshop");
                }
                echo " ".get_string("on", "workshop", userdate($comment->timecreated))."</b></p></td></tr><tr><td>\n";
                echo format_text($comment->comments)."&nbsp;\n";
                // add the links if needed
                if ($firstcomment and $showcommentlinks and !$assessment->timeagreed) {
                    // show links depending on who doing the viewing
                    $firstcomment = FALSE;
                    if (workshop_is_teacher($workshop, $USER->id) and ($comment->userid != $USER->id)) {
                        echo "<p style=\"text-align:right\"><a href=\"assessments.php?action=addcomment&amp;id=$cm->id&amp;aid=$assessment->id\">".
                            get_string("reply", "workshop")."</a></p>\n";
                    }
                    elseif (($comment->userid ==$USER->id) and (($timenow - $comment->timecreated) < $CFG->maxeditingtime)) {
                        echo "<p style=\"text-align:right\"><a href=\"assessments.php?action=editcomment&amp;id=$cm->id&amp;cid=$comment->id\">".
                            get_string("edit", "workshop")."</a>\n";
                        if ($USER->id == $submission->userid) {
                            echo " | <a href=\"assessments.php?action=agreeassessment&amp;id=$cm->id&amp;aid=$assessment->id\">".
                                get_string("agreetothisassessment", "workshop")."</a>\n";
                        }
                        echo '</p>';
                    }
                    elseif (($comment->userid != $USER->id) and (($USER->id == $assessment->userid) or 
                        ($USER->id == $submission->userid))) {
                        echo "<p style=\"text-align:right\"><a href=\"assessments.php?action=addcomment&amp;id=$cm->id&amp;aid=$assessment->id\">".
                            get_string("reply", "workshop")."</a>\n";
                        if ($USER->id == $submission->userid) {
                            echo " | <a href=\"assessments.php?action=agreeassessment&amp;id=$cm->id&amp;aid=$assessment->id\">".
                                get_string("agreetothisassessment", "workshop")."</a>\n";
                        }
                        echo '</p>';
                    }
                }
                echo '</td></tr>';
            }
            echo '</table>';
        }
        echo '</div>';
    }
        
    // now print the grading form with the grading grade if any
    // FORM is needed for Mozilla browsers, else radio bttons are not checked
        ?>
    <form id="assessmentform" method="post" action="assessments.php">
    <div>
    <input type="hidden" name="id" value="<?php echo $cm->id ?>" />
    <input type="hidden" name="aid" value="<?php echo @$assessment->id ?>" />
    <input type="hidden" name="action" value="updateassessment" />
    <input type="hidden" name="returnto" value="<?php echo $returnto ?>" />
    <input type="hidden" name="elementno" value="" />
    <input type="hidden" name="stockcommentid" value="" />
    <div class="boxaligncenter">
    <table cellpadding="2" border="1" class="boxaligncenter">
    <?php
    echo "<tr valign=\"top\">\n";
    echo "  <td colspan=\"2\" class=\"workshopassessmentheading\"><div style=\"text-align:center;\"><b>";
    if ($assessment and workshop_is_teacher($workshop)) {
        $user = get_record('user', 'id', $assessment->userid);
        print_string("assessmentby", "workshop", fullname($user));
    } else {
        print_string('assessment', 'workshop');
    }
    echo '</b><br />'.userdate(@$assessment->timecreated)."</div></td>\n";
    echo "</tr>\n";
    
    // only show the grade if grading strategy > 0 and the grade is positive
    if ($assessment and $showgrades and $workshop->gradingstrategy and $assessment->grade >= 0) { 
        echo "<tr valign=\"top\">\n
            <td colspan=\"2\" align=\"center\">
            <b>".get_string("thegradeis", "workshop").": ".
            number_format($assessment->grade * $workshop->grade / 100, 2)." (".
            get_string("maximumgrade")." ".number_format($workshop->grade, 0).")</b>
            </td></tr><tr><td colspan=\"2\" class=\"workshopassessmentheading\">&nbsp;</td></tr>\n";
    }
    
    // get the assignment elements...
    $elementsraw = get_records("workshop_elements", "workshopid", $workshop->id, "elementno ASC");
    if (count($elementsraw) < $workshop->nelements) {
        print_string("noteonassignmentelements", "workshop");
    }
    if ($elementsraw) {
        foreach ($elementsraw as $element) {
            $elements[] = $element;   // to renumber index 0,1,2...
        }
    } else {
        $elements = null;
    }

    if ($assessment) {
        // get any previous grades...
        if ($gradesraw = get_records_select("workshop_grades", "assessmentid = $assessment->id", "elementno")) {
            foreach ($gradesraw as $grade) {
                $grades[] = $grade;   // to renumber index 0,1,2...
                }
            }
        }
    else {
        // setup dummy grades array
        for($i = 0; $i < count($elementsraw); $i++) { // gives a suitable sized loop
            $grades[$i]->feedback = get_string("yourfeedbackgoeshere", "workshop");
            $grades[$i]->grade = 0;
            }
        }
                
    // determine what sort of grading
    switch ($workshop->gradingstrategy) {
        case 0:  // no grading
            // now print the form
            for ($i=0; $i < count($elements); $i++) {
                $iplus1 = $i+1;
                echo "<tr valign=\"top\">\n";
                echo "  <td align=\"right\"><p><b>". get_string("element","workshop")." $iplus1:</b></p></td>\n";
                echo "  <td>".format_text($elements[$i]->description);
                echo "</td></tr>\n";
                echo "<tr valign=\"top\">\n";
                echo "  <td align=\"right\"><p><b>". get_string("feedback").":</b></p></td>\n";
                echo "  <td>\n";
                if ($allowchanges) {
                    echo "      <textarea name=\"feedback_$i\" rows=\"3\" cols=\"75\" >\n";
                    if (isset($grades[$i]->feedback)) {
                        echo $grades[$i]->feedback;
                        }
                    echo "</textarea>\n";
                    }
                else {
                    echo format_text($grades[$i]->feedback);
                    }
                echo "  </td>\n";
                echo "</tr>\n";

                // if active and the teacher show stock comments...
                if ($allowchanges and workshop_is_teacher($workshop, $USER->id)) {
                    echo "<tr><td valign=\"top\" align=\"right\"><input type=\"button\" value=\"".
                        get_string("addcomment", "workshop")."\" 
                        onclick=\"getElementById('assessmentform').action.value='addstockcomment';
                        getElementById('assessmentform').elementno.value=$i;getElementById('assessmentform').submit();\" /> \n";
                    helpbutton("addcommenttobank", get_string("addcomment", "workshop"), "workshop");
                    echo "</td><td>\n";
                    if ($stockcomments = get_records_select("workshop_stockcomments", "workshopid = $workshop->id
                            AND elementno = $i", "id")) { // show comments in fixed order (oldest first)
                        foreach ($stockcomments as $stockcomment) {
                            echo "<a onclick=\"getElementById('assessmentform').feedback_$i.value+=' '+'".
                                addslashes($stockcomment->comments)."';\">&lt;&lt;$stockcomment->comments&gt;&gt;</a>\n";
                            if (workshop_is_teacheredit($workshop, $USER->id)) {
                                echo " <a onclick=\"getElementById('assessmentform').action.value='removestockcomment';getElementById('assessmentform').stockcommentid.value=$stockcomment->id;getElementById('assessmentform').submit();\"> <small><i>&lt;--".get_string("delete","workshop")."</i></small></a>\n";
                            }
                            echo "<br />\n";
                        }
                    } 
                    echo "</td></tr>\n";
                }

                echo "<tr valign=\"top\">\n";
                echo "  <td colspan=\"2\" class=\"workshopassessmentheading\">&nbsp;</td>\n";
                echo "</tr>\n";
                }
            break;
            
        case 1: // accumulative grading
            // now print the form
            for ($i=0; $i < count($elements); $i++) {
                $iplus1 = $i+1;
                echo "<tr valign=\"top\">\n";
                echo "  <td align=\"right\"><p><b>". get_string("element","workshop")." $iplus1:</b></p></td>\n";
                echo "  <td>".format_text($elements[$i]->description);
                echo "<p style=\"text-align:right\">".get_string("weight", "workshop").": ".
                    number_format($WORKSHOP_EWEIGHTS[$elements[$i]->weight], 2)."</p>\n";
                echo "</td></tr>\n";
                if ($showgrades) {
                    echo "<tr valign=\"top\">\n";
                    echo "  <td align=\"right\"><p><b>". get_string("grade"). ":</b></p></td>\n";
                    echo "  <td valign=\"top\">\n";
                    
                    // get the appropriate scale
                    $scalenumber=$elements[$i]->scale;
                    $SCALE = (object)$WORKSHOP_SCALES[$scalenumber];
                    switch ($SCALE->type) {
                        case 'radio' :
                                // show selections highest first
                                echo "<div class=\"boxaligncenter\"><b>$SCALE->start</b>&nbsp;&nbsp;&nbsp;";
                                for ($j = $SCALE->size - 1; $j >= 0 ; $j--) {
                                    $checked = false;
                                    if (isset($grades[$i]->grade)) { 
                                        if ($j == $grades[$i]->grade) {
                                            $checked = true;
                                            }
                                        }
                                    else { // there's no previous grade so check the lowest option
                                        if ($j == 0) {
                                            $checked = true;
                                            }
                                        }
                                    if ($checked) {
                                        echo " <input type=\"radio\" name=\"grade[$i]\" value=\"$j\" checked=\"checked\" alt=\"$j\" /> &nbsp;&nbsp;&nbsp;\n";
                                        }
                                    else {
                                        echo " <input type=\"radio\" name=\"grade[$i]\" value=\"$j\" alt=\"$j\" /> &nbsp;&nbsp;&nbsp;\n";
                                        }
                                    }
                                echo "&nbsp;&nbsp;&nbsp;<b>$SCALE->end</b></div>\n";
                                break;
                        case 'selection' :  
                                unset($numbers);
                                for ($j = $SCALE->size; $j >= 0; $j--) {
                                    $numbers[$j] = $j;
                                    }
                                if (isset($grades[$i]->grade)) {
                                    choose_from_menu($numbers, "grade[$i]", $grades[$i]->grade, "");
                                    }
                                else {
                                    choose_from_menu($numbers, "grade[$i]", 0, "");
                                    }
                                break;
                        }
            
                    echo "  </td>\n";
                    echo "</tr>\n";
                    }
                echo "<tr valign=\"top\">\n";
                echo "  <td align=\"right\"><p><b>". get_string("feedback").":</b></p></td>\n";
                echo "  <td>\n";
                if ($allowchanges) {
                    echo "      <textarea name=\"feedback_$i\" rows=\"3\" cols=\"75\" >\n";
                    if (isset($grades[$i]->feedback)) {
                        echo $grades[$i]->feedback;
                        }
                    echo "</textarea>\n";
                    }
                else {
                    echo format_text($grades[$i]->feedback);
                    }
                echo "  </td>\n";
                echo "</tr>\n";
                
                // if active and the teacher show stock comments...
                if ($allowchanges and workshop_is_teacher($workshop, $USER->id)) {
                    echo "<tr><td valign=\"top\" align=\"right\"><input type=\"button\" value=\"".
                        get_string("addcomment", "workshop")."\" 
                        onclick=\"getElementById('assessmentform').action.value='addstockcomment';
                        getElementById('assessmentform').elementno.value=$i;getElementById('assessmentform').submit();\" /> \n";
                    helpbutton("addcommenttobank", get_string("addcomment", "workshop"), "workshop");
                    echo "</td><td>\n";
                    if ($stockcomments = get_records_select("workshop_stockcomments", "workshopid = $workshop->id
                            AND elementno = $i", "id")) { // get comments in a fixed order - oldest first
                        foreach ($stockcomments as $stockcomment) {
                            echo "<a onclick=\"getElementById('assessmentform').feedback_$i.value+=' '+'".
                                addslashes($stockcomment->comments).
                                "';\">&lt;&lt;$stockcomment->comments&gt;&gt;</a>\n";
                            if (workshop_is_teacheredit($workshop, $USER->id)) {
                                echo " <a onclick=\"getElementById('assessmentform').action.value='removestockcomment';getElementById('assessmentform').stockcommentid.value=$stockcomment->id;getElementById('assessmentform').submit();\"> <small><i>&lt;--".get_string("delete","workshop")."</i></small></a>\n";
                            }
                            echo "<br />\n";
                        }
                    } 
                    echo "</td></tr>\n";
                }

                echo "<tr valign=\"top\">\n";
                echo "  <td colspan=\"2\" class=\"workshopassessmentheading\">&nbsp;</td>\n";
                echo "</tr>\n";
                }
            break;
            
        case 2: // error banded grading
            // now run through the elements
            $negativecount = 0;
            for ($i=0; $i < count($elements) - 1; $i++) {
                $iplus1 = $i+1;
                echo "<tr valign=\"top\">\n";
                echo "  <td align=\"right\"><p><b>". get_string("element","workshop")." $iplus1:</b></p></td>\n";
                echo "  <td>".format_text($elements[$i]->description);
                echo "<p style=\"text-align:right\">".get_string("weight", "workshop").": ".
                    number_format($WORKSHOP_EWEIGHTS[$elements[$i]->weight], 2)."\n";
                echo "</td></tr>\n";
                echo "<tr valign=\"top\">\n";
                echo "  <td align=\"right\"><p><b>". get_string("grade"). ":</b></p></td>\n";
                echo "  <td valign=\"top\">\n";
                    
                // get the appropriate scale - yes/no scale (0)
                $SCALE = (object) $WORKSHOP_SCALES[0];
                switch ($SCALE->type) {
                    case 'radio' :
                            // show selections highest first
                            echo "<div class=\"boxaligncenter\"><b>$SCALE->start</b>&nbsp;&nbsp;&nbsp;";
                            for ($j = $SCALE->size - 1; $j >= 0 ; $j--) {
                                $checked = false;
                                if (isset($grades[$i]->grade)) { 
                                    if ($j == $grades[$i]->grade) {
                                        $checked = true;
                                        }
                                    }
                                else { // there's no previous grade so check the lowest option
                                    if ($j == 0) {
                                        $checked = true;
                                        }
                                    }
                                if ($checked) {
                                    echo " <input type=\"radio\" name=\"grade[$i]\" value=\"$j\" checked=\"checked\" alt=\"$j\" /> &nbsp;&nbsp;&nbsp;\n";
                                    }
                                else {
                                    echo " <input type=\"radio\" name=\"grade[$i]\" value=\"$j\" alt=\"$j\" /> &nbsp;&nbsp;&nbsp;\n";
                                    }
                                }
                            echo "&nbsp;&nbsp;&nbsp;<b>$SCALE->end</b></div>\n";
                            break;
                    case 'selection' :  
                            unset($numbers);
                            for ($j = $SCALE->size; $j >= 0; $j--) {
                                $numbers[$j] = $j;
                                }
                            if (isset($grades[$i]->grade)) {
                                choose_from_menu($numbers, "grade[$i]", $grades[$i]->grade, "");
                                }
                            else {
                                choose_from_menu($numbers, "grade[$i]", 0, "");
                                }
                            break;
                    }
        
                echo "  </td>\n";
                echo "</tr>\n";
                echo "<tr valign=\"top\">\n";
                echo "  <td align=\"right\"><p><b>". get_string("feedback").":</b></p></td>\n";
                echo "  <td>\n";
                if ($allowchanges) {
                    echo "      <textarea name=\"feedback_$i\" rows=\"3\" cols=\"75\" >\n";
                    if (isset($grades[$i]->feedback)) {
                        echo $grades[$i]->feedback;
                        }
                    echo "</textarea>\n";
                    }
                else {
                    if (isset($grades[$i]->feedback)) {
                        echo format_text($grades[$i]->feedback);
                        }
                    }
                echo "&nbsp;</td>\n";
                echo "</tr>\n";

                // if active and the teacher show stock comments...
                if ($allowchanges and workshop_is_teacher($workshop, $USER->id)) {
                    echo "<tr><td valign=\"top\" align=\"right\"><input type=\"button\" value=\"".
                        get_string("addcomment", "workshop")."\" 
                        onclick=\"getElementById('assessmentform').action.value='addstockcomment';
                        getElementById('assessmentform').elementno.value=$i;getElementById('assessmentform').submit();\" /> \n";
                    helpbutton("addcommenttobank", get_string("addcomment", "workshop"), "workshop");
                    echo "</td><td>\n";
                    if ($stockcomments = get_records_select("workshop_stockcomments", "workshopid = $workshop->id
                            AND elementno = $i", "id")) { // get comments in a fixed order - oldest first
                        foreach ($stockcomments as $stockcomment) {
                            echo "<a onclick=\"getElementById('assessmentform').feedback_$i.value+=' '+'".
                                addslashes($stockcomment->comments).
                                "';\">&lt;&lt;$stockcomment->comments&gt;&gt;</a>\n";
                            if (workshop_is_teacheredit($workshop, $USER->id)) {
                                echo " <a onclick=\"getElementById('assessmentform').action.value='removestockcomment';getElementById('assessmentform').stockcommentid.value=$stockcomment->id;getElementById('assessmentform').submit();\"> <small><i>&lt;--".get_string("delete","workshop")."</i></small></a>\n";
                            }
                            echo "<br />\n";
                        }
                    } 
                    echo "</td></tr>\n";
                }
                echo "<tr valign=\"top\">\n";
                echo "  <td colspan=\"2\" class=\"workshopassessmentheading\">&nbsp;</td>\n";
                echo "</tr>\n";
                if (empty($grades[$i]->grade)) {
                    $negativecount++;
                    }
                }
            // print the number of negative elements
            // echo "<tr><td>".get_string("numberofnegativeitems", "workshop")."</td><td>$negativecount</td></tr>\n";
            // echo "<tr valign=\"top\">\n";
            // echo "   <td colspan=\"2\" class=\"workshopassessmentheading\">&nbsp;</td>\n";
            echo "</table></div>\n";
            // now print the grade table
            echo "<p><div style=\"text-align:center;\"><b>".get_string("gradetable","workshop")."</b></div>\n";
            echo "<div class=\"boxaligncenter\"><table cellpadding=\"5\" border=\"1\"><tr><td align=\"CENTER\">".
                get_string("numberofnegativeresponses", "workshop");
            echo "</td><td>". get_string("suggestedgrade", "workshop")."</td></tr>\n";
            for ($j = 100; $j >= 0; $j--) {
                $numbers[$j] = $j;
                }
            for ($i=0; $i<=$workshop->nelements; $i++) {
                if ($i == $negativecount) {
                    echo "<tr><td align=\"CENTER\"><img src=\"$CFG->pixpath/t/right.gif\" alt=\"\" /> $i</td><td align=\"center\">{$elements[$i]->maxscore}</td></tr>\n";
                    }
                else {
                    echo "<tr><td align=\"CENTER\">$i</td><td align=\"CENTER\">{$elements[$i]->maxscore}</td></tr>\n";
                    }
                }
            echo "</table></div>\n";
            echo "<p><div class=\"boxaligncenter\"><table cellpadding=\"5\" border=\"1\"><tr><td><b>".get_string("optionaladjustment", 
                    "workshop")."</b></td><td>\n";
            unset($numbers);
            for ($j = 20; $j >= -20; $j--) {
                $numbers[$j] = $j;
                }
            if (isset($grades[$workshop->nelements]->grade)) {
                choose_from_menu($numbers, "grade[$workshop->nelements]", $grades[$workshop->nelements]->grade, "");
                }
            else {
                choose_from_menu($numbers, "grade[$workshop->nelements]", 0, "");
                }
            echo "</td></tr>\n";
            break;
            
        case 3: // criteria grading
            echo "<tr valign=\"top\">\n";
            echo "  <td class=\"workshopassessmentheading\">&nbsp;</td>\n";
            echo "  <td class=\"workshopassessmentheading\"><b>". get_string("criterion","workshop")."</b></td>\n";
            echo "  <td class=\"workshopassessmentheading\"><b>".get_string("select", "workshop")."</b></td>\n";
            echo "  <td class=\"workshopassessmentheading\"><b>".get_string("suggestedgrade", "workshop")."</b></td>\n";
            // find which criteria has been selected (saved in the zero element), if any
            if (isset($grades[0]->grade)) {
                $selection = $grades[0]->grade;
                }
            else {
                $selection = 0;
                }
            // now run through the elements
            for ($i=0; $i < count($elements); $i++) {
                $iplus1 = $i+1;
                echo "<tr valign=\"top\">\n";
                echo "  <td>$iplus1</td><td>".format_text($elements[$i]->description)."</td>\n";
                if ($selection == $i) {
                    echo "  <td align=\"center\"><input type=\"radio\" name=\"grade[0]\" value=\"$i\" checked=\"checked\" alt=\"$i\" /></td>\n";
                    }
                else {
                    echo "  <td align=\"center\"><input type=\"radio\" name=\"grade[0]\" value=\"$i\" alt=\"$i\" /></td>\n";
                    }
                echo "<td align=\"center\">{$elements[$i]->maxscore}</td></tr>\n";
                }
            echo "</table></div>\n";
            echo "<p><div class=\"boxaligncenter\"><table cellpadding=\"5\" border=\"1\"><tr><td><b>".get_string("optionaladjustment", 
                    "workshop")."</b></td><td>\n";
            unset($numbers);
            for ($j = 20; $j >= -20; $j--) {
                $numbers[$j] = $j;
                }
            if (isset($grades[1]->grade)) {
                choose_from_menu($numbers, "grade[1]", $grades[1]->grade, "");
                }
            else {
                choose_from_menu($numbers, "grade[1]", 0, "");
                }
            echo "</td></tr>\n";
            break;
            
        case 4: // rubric grading
            // now run through the elements...
            for ($i=0; $i < count($elements); $i++) {
                $iplus1 = $i+1;
                echo "<tr valign=\"top\">\n";
                echo "<td align=\"right\"><b>".get_string("element", "workshop")." $iplus1:</b></td>\n";
                echo "<td>".format_text($elements[$i]->description).
                     "<p style=\"text-align:right\">".get_string("weight", "workshop").": ".
                    number_format($WORKSHOP_EWEIGHTS[$elements[$i]->weight], 2)."</td></tr>\n";
                echo "<tr valign=\"top\">\n";
                echo "  <td class=\"workshopassessmentheading\" align=\"center\"><b>".get_string("select", "workshop").
                    "</b></td>\n";
                echo "  <td class=\"workshopassessmentheading\"><b>". get_string("criterion","workshop").
                    "</b></td></tr>\n";
                if (isset($grades[$i])) {
                    $selection = $grades[$i]->grade;
                } else {
                    $selection = 0;
                }
                // ...and the rubrics
                if ($rubricsraw = get_records_select("workshop_rubrics", "workshopid = $workshop->id AND 
                        elementno = $i", "rubricno ASC")) {
                    unset($rubrics);
                    foreach ($rubricsraw as $rubic) {
                        $rubrics[] = $rubic;   // to renumber index 0,1,2...
                    }
                    for ($j=0; $j<5; $j++) {
                        if (empty($rubrics[$j]->description)) {
                            break; // out of inner for loop
                        }
                        echo "<tr valign=\"top\">\n";
                        if ($selection == $j) {
                            echo "  <td align=\"center\"><input type=\"radio\" name=\"grade[$i]\" value=\"$j\" 
                                checked=\"checked\" alt=\"$j\" /></td>\n";
                        } else {
                            echo "  <td align=\"center\"><input type=\"radio\" name=\"grade[$i]\" value=\"$j\" 
                                alt=\"$j\" /></td>\n";
                        }
                        echo "<td>".format_text($rubrics[$j]->description)."</td>\n";
                    }
                    echo "<tr valign=\"top\">\n";
                    echo "  <td align=\"right\"><p><b>". get_string("feedback").":</b></p></td>\n";
                    echo "  <td>\n";
                    if ($allowchanges) {
                        echo "      <textarea name=\"feedback_$i\" rows=\"3\" cols=\"75\" >\n";
                        if (isset($grades[$i]->feedback)) {
                            echo $grades[$i]->feedback;
                        }
                        echo "</textarea>\n";
                    } else {
                        echo format_text($grades[$i]->feedback);
                    }
                    echo "  </td>\n";
                    echo "</tr>\n";

                    // if active and the teacher show stock comments...
                    if ($allowchanges and workshop_is_teacher($workshop, $USER->id)) {
                    echo "<tr><td valign=\"top\" align=\"right\"><input type=\"button\" value=\"".
                        get_string("addcomment", "workshop")."\" 
                        onclick=\"getElementById('assessmentform').action.value='addstockcomment';
                        getElementById('assessmentform').elementno.value=$i;getElementById('assessmentform').submit();\" /> \n";
                    helpbutton("addcommenttobank", get_string("addcomment", "workshop"), "workshop");
                    echo "</td><td>\n";
                        if ($stockcomments = get_records_select("workshop_stockcomments", "workshopid = $workshop->id
                                    AND elementno = $i", "id")) { // show comments in fixed (creation) order
                            foreach ($stockcomments as $stockcomment) {
                                echo "<a onclick=\"getElementById('assessmentform').feedback_$i.value+=' '+'".
                                    addslashes($stockcomment->comments).
                                    "';\">&lt;&lt;$stockcomment->comments&gt;&gt;</a>\n";
                                if (workshop_is_teacheredit($workshop, $USER->id)) {
                                    echo " <a onclick=\"getElementById('assessmentform').action.value='removestockcomment';getElementById('assessmentform').stockcommentid.value=$stockcomment->id;getElementById('assessmentform').submit();\"> <small><i>&lt;--".get_string("delete","workshop")."</i></small></a>\n";
                                }
                                echo "<br />\n";
                            }
                        } 
                        echo "</td></tr>\n";
                    }

                    echo "<tr valign=\"top\">\n";
                    echo "  <td colspan=\"2\" class=\"workshopassessmentheading\">&nbsp;</td>\n";
                    echo "</tr>\n";
                }
            }
            break;
        } // end of outer switch
    
        // now get the general comment (present in all types)
        echo "<tr valign=\"top\">\n";
        switch ($workshop->gradingstrategy) {
            case 0:
            case 1:
            case 4 : // no grading, accumulative and rubic
                echo "  <td align=\"right\"><p><b>". get_string("generalcomment", "workshop").":</b></p></td>\n";
                break; 
            default : 
                echo "  <td align=\"right\"><p><b>".get_string("generalcomment", "workshop")."/<br />".
                    get_string("reasonforadjustment", "workshop").":</b></p></td>\n";
        }
        echo "  <td>\n";
        if ($allowchanges) {
            echo "      <textarea name=\"generalcomment\" rows=\"5\" cols=\"75\" >\n";
            if (isset($assessment->generalcomment)) {
                echo $assessment->generalcomment;
            }
            echo "</textarea>\n";
        } else {
        if ($assessment) {
            if (isset($assessment->generalcomment)) {
                echo format_text($assessment->generalcomment);
            }
        } else {
            print_string("yourfeedbackgoeshere", "workshop");
        }
    }
    echo "&nbsp;</td>\n";
    echo "</tr>\n";
    // if active and the teacher show stock comments...
    if ($allowchanges and workshop_is_teacher($workshop, $USER->id)) {
        echo "<tr><td valign=\"top\" align=\"right\"><input type=\"button\" value=\"".
            get_string("addcomment", "workshop")."\" 
            onclick=\"getElementById('assessmentform').action.value='addstockcomment';
        getElementById('assessmentform').elementno.value=99;getElementById('assessmentform').submit();\" /> \n";
        helpbutton("addcommenttobank", get_string("addcomment", "workshop"), "workshop");
        echo "</td><td>\n";
        if ($stockcomments = get_records_select("workshop_stockcomments", "workshopid = $workshop->id
                    AND elementno = 99", "id")) { // show in the same order (oldest at the top)
            foreach ($stockcomments as $stockcomment) {
                echo "<a onclick=\"getElementById('assessmentform').generalcomment.value+=' '+'".
                    addslashes($stockcomment->comments)."';\">&lt;&lt;$stockcomment->comments&gt;&gt;</a>\n";
                if (workshop_is_teacheredit($workshop, $USER->id)) {
                    echo " <a onclick=\"getElementById('assessmentform').action.value='removestockcomment';getElementById('assessmentform').stockcommentid.value=$stockcomment->id;getElementById('assessmentform').submit();\"> <small><i>&lt;--".get_string("delete","workshop")."</i></small></a>\n";
                }
                echo "<br />\n";
            }
        } 
        echo "</td></tr>\n";
    }
    
    $timenow = time();
    // now show the grading grade if available...
    if ($assessment and $assessment->timegraded) {
        echo "<tr valign=\"top\">\n";
        echo "<td colspan=\"2\" class=\"workshopassessmentheading\" align=\"center\"><b>".
            get_string('gradeforstudentsassessment', 'workshop')."</b></td>\n";
        echo "</tr>\n";
        
        if ($assessment->teachercomment) {
            echo "<tr valign=top>\n";
            echo "  <td align=\"right\"><p><b>". get_string("teacherscomment", "workshop").":</b></p></td>\n";
            echo "  <td>\n";
            echo text_to_html($assessment->teachercomment);
            echo "&nbsp;</td>\n";
            echo "</tr>\n";
        }

        echo "<tr valign=\"top\">\n";
        echo "  <td align=\"right\"><p><b>";
        print_string('grade', 'workshop');
        echo ":</b></p></td><td>\n";
        echo number_format($assessment->gradinggrade * $workshop->gradinggrade / 100, 0);
        echo "&nbsp;</td>\n";
        echo "</tr>\n";
    }
    
    echo "<tr valign=\"top\">\n";
    echo "  <td colspan=\"2\" class=\"workshopassessmentheading\">&nbsp;</td>\n";
    echo "</tr>\n";
            
    // ...and close the table, show submit button if needed...
    echo "</table>\n";
    if ($assessment) {
        if ($allowchanges) {  
            echo "<input type=\"submit\" value=\"".get_string("savemyassessment", "workshop")."\" />\n";
        }
        // ...if user is author, assessment not agreed, there's no comments, the showcommentlinks flag is set and 
        // it's not self assessment then show some buttons!
        if (($submission->userid == $USER->id) and !$assessment->timeagreed and !$comments and $showcommentlinks and 
                $submission->userid != $assessment->userid) {
            echo "<input type=\"button\" value=\"".get_string("agreetothisassessment", "workshop")."\" 
                onclick=\"getElementById('assessmentform').action.value='agreeassessment';getElementById('assessmentform').submit();\" />\n";
            echo "<input type=\"submit\" value=\"".get_string("disagreewiththisassessment", "workshop")."\"
                onclick=\"getElementById('assessmentform').action.value='addcomment';getElementById('assessmentform').submit();\" />\n";
        }
    }
    echo "</div>";
    echo "</div></form>\n";
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_assessments_by_user_for_admin($workshop, $user) {

    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }

    if ($assessments = workshop_get_user_assessments_done($workshop, $user)) {
        foreach ($assessments as $assessment) {
            workshop_print_assessment($workshop, $assessment);
            echo "<p style=\"text-align:right\">".
                '<a href="viewassessment.php?&amp;id='.$cm->id.'&amp;stype=student&amp;aid='.$assessment->id.'">'.
                get_string('assessthisassessment', 'workshop').'</a> | '.
                "<a href=\"assessments.php?action=confirmdelete&amp;id=$cm->id&amp;aid=$assessment->id\">".
                get_string("delete", "workshop")."</a></p><hr />\n";
            }
        }
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_assessments_for_admin($workshop, $submission) {

    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }

    if ($assessments =workshop_get_assessments($submission)) {
        foreach ($assessments as $assessment) {
            if (!$user = get_record("user", "id", $assessment->userid)) {
                error (" workshop_print_assessments_for_admin: unable to get user record");
                }
            echo "<p><div style=\"text-align:center;\"><b>".get_string("assessmentby", "workshop", fullname($user))."</b></div></p>\n";
            workshop_print_assessment($workshop, $assessment);
            echo "<p style=\"text-align:right\"><a href=\"assessments.php?action=confirmdelete&amp;id=$cm->id&amp;aid=$assessment->id\">".
                get_string("delete", "workshop")."</a></p><hr />\n";
            }
        }
    }


//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_assignment_info($workshop) {
    global $CFG;

    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
    }
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $course->id)) {
        error("Course Module ID was incorrect");
    }
    // print standard assignment heading
    print_heading(format_string($workshop->name), "center");
    print_simple_box_start("center");

    // print phase and date info
    $string = '<b>'.get_string('currentphase', 'workshop').'</b>: '.workshop_phase($workshop).'<br />';
    $dates = array(
        'submissionstart' => $workshop->submissionstart,
        'submissionend' => $workshop->submissionend,
        'assessmentstart' => $workshop->assessmentstart,
        'assessmentend' => $workshop->assessmentend
    );
    foreach ($dates as $type => $date) {
        if ($date) {
            $strdifference = format_time($date - time());
            if (($date - time()) < 0) {
                $strdifference = "<span class=\"redfont\">$strdifference</span>";
            }
            $string .= '<b>'.get_string($type, 'workshop').'</b>: '.userdate($date)." ($strdifference)<br />";
        }
    }
    echo $string;

    $grade = $workshop->gradinggrade + $workshop->grade;
    echo "<br /><b>".get_string("maximumgrade")."</b>: $grade  ";
    // print link to specimen assessment form
    echo "(<a href=\"assessments.php?id=$cm->id&amp;action=displaygradingform\">".
        get_string("specimenassessmentform", "workshop")."</a>";
    // print edit icon
    if (workshop_is_teacheredit($workshop) and $workshop->nelements) {
        echo " <a href=\"assessments.php?id=$cm->id&amp;action=editelements\">".
             "<img src=\"$CFG->pixpath/t/edit.gif\" ".
             'class="iconsmall" alt="'.get_string('amendassessmentelements', 'workshop').'" /></a>';
    }
    echo ")<br />";
    print_simple_box_end();
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_difference($time) {
    if ($time < 0) {
        $timetext = get_string("late", "assignment", format_time($time));
        return " (<span class=\"redfont\">$timetext</span>)";
    } else {
        $timetext = get_string("early", "assignment", format_time($time));
        return " ($timetext)";
    }
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_key($workshop) {
    // print an explaination of the grades
    
    if (!$course = get_record("course", "id", $workshop->course)) {
        error("Print key: course not found");
    }
    echo "<div class=\"workshopkey\">\n";
    echo "<p><small>{} ".get_string("assessmentby", "workshop", $course->student).";&nbsp;&nbsp;\n";
    echo "[] ".get_string("assessmentby", "workshop", $course->teacher).";&nbsp;&nbsp;\n";
    echo "&lt;&gt; ".get_string("assessmentdropped", "workshop").";\n";
    if ($workshop->agreeassessments) echo "&lt;&lt;&gt;&gt; ".get_string("assessmentnotyetagreed", "workshop").";\n";
    echo "<br />() ".get_string("automaticgradeforassessment", "workshop").";&nbsp;&nbsp;\n";
    echo "[] ".get_string("teachergradeforassessment", "workshop", $course->teacher).".\n";
    echo "<br />".get_string("gradesforsubmissionsare", "workshop", $workshop->grade).";&nbsp;&nbsp;\n";
    echo get_string("gradesforassessmentsare", "workshop", $workshop->gradinggrade).".</small></p>\n";
    echo "</div>\n";
    return;    
}
    

//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_league_table($workshop) {
    // print an order table of (student) submissions showing teacher's and student's assessments
    
    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Print league table: Course is misconfigured");
    }
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
            error("Course Module ID was incorrect");
    }
    // set $groupid if workshop is in SEPARATEGROUPS mode
    if (groupmode($course, $cm) == SEPARATEGROUPS) {
        $groupid = get_current_group($course->id);
    } else {
        $groupid = 0;
    }
 
    $nentries = $workshop->showleaguetable;
    if ($workshop->anonymous and workshop_is_student($workshop)) {
        $table->head = array (get_string("title", "workshop"), 
            get_string("teacherassessments", "workshop", $course->teacher),  
            get_string("studentassessments", "workshop",    $course->student), get_string("overallgrade", "workshop"));
        $table->align = array ("left",  "center", "center", "center");
        $table->size = array ("*", "*", "*", "*");
    }
    else { // show names
        $table->head = array (get_string("title", "workshop"),  get_string("name"),
            get_string("teacherassessments", "workshop", $course->teacher),  
            get_string("studentassessments", "workshop",    $course->student), get_string("overallgrade", "workshop"));
        $table->align = array ("left", "left", "center", "center", "center");
        $table->size = array ("*", "*", "*", "*", "*");
    }
    $table->cellpadding = 2;
    $table->cellspacing = 0;

    if ($submissions = workshop_get_student_submissions($workshop)) {
        foreach ($submissions as $submission) {
            if ($groupid) {
                // check submission's group
                if (!groups_is_member($groupid, $submission->userid)) {
                    continue; // skip this submission
                }
            }
            $grades[$submission->id] = workshop_submission_grade($workshop, $submission);
        }
        arsort($grades); // largest grade first
        reset($grades);
        $n = 1;
        while (list($submissionid, $grade) = each($grades)) {
            if (!$submission = get_record("workshop_submissions", "id", $submissionid)) {
                error("Print league table: submission not found");
            }
            if (!$user = get_record("user", "id", $submission->userid)) {
                error("Print league table: user not found");
            }
            if ($workshop->anonymous and workshop_is_student($workshop)) {
                $table->data[] = array(workshop_print_submission_title($workshop, $submission),
                        workshop_print_submission_assessments($workshop, $submission, "teacher"),
                        workshop_print_submission_assessments($workshop, $submission, "student"), $grade);
            }
            else {
                $table->data[] = array(workshop_print_submission_title($workshop, $submission), fullname($user),
                        workshop_print_submission_assessments($workshop, $submission, "teacher"),
                        workshop_print_submission_assessments($workshop, $submission, "student"), $grade);
            }
            $n++;
            if ($n > $nentries) {
                break;
            }
        }
        print_heading(get_string("leaguetable", "workshop"));
        print_table($table);
        workshop_print_key($workshop);
    }
}
    

//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_submission($workshop, $submission) {
    // prints the submission with optional attachments
    global $CFG;

    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
            error("Course Module ID was incorrect");
    }
    print_simple_box(format_text($submission->description), 'center');
    if ($workshop->nattachments) {
        $n = 1;
        echo "<table align=\"center\">\n";
        $filearea = workshop_file_area_name($workshop, $submission);
        if ($basedir = workshop_file_area($workshop, $submission)) {
            if ($files = get_directory_list($basedir)) {
                require_once($CFG->libdir .'/filelib.php');
                foreach ($files as $file) {
                    $icon = mimeinfo("icon", $file);
                    $ffurl = get_file_url("$filearea/$file");
                    echo "<tr><td><b>".get_string("attachment", "workshop")." $n:</b> \n";
                    // removed target=\"uploadedfile\" as it does not validate
                    // MDL-7861
                    echo "<img src=\"$CFG->pixpath/f/$icon\" class=\"icon\" alt=\"".get_string('file')."\" />".
                        "&nbsp;<a href=\"$ffurl\">$file</a></td></tr>";
                    $n++;
                }
            }
        }
        echo "</table>\n";
    }
    return;
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_submission_assessments($workshop, $submission, $type) {
    global $USER, $CFG;
    // Returns the teacher or peer grade and a hyperlinked list of grades for this submission
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
        error("Course Module ID was incorrect");
    }
    $str = '';
    // get the assessments in grade order, highest first
    if ($assessments = workshop_get_assessments($submission, "", "grade DESC")) {
        if ($type == 'teacher' or $type == 'all') {
            // students can see teacher assessments only if the release date has passed
            $timenow = time();
            if (workshop_is_teacher($workshop, $USER->id) or ($timenow > $workshop->releasegrades)) {
                foreach ($assessments as $assessment) {
                    if (workshop_is_teacher($workshop, $assessment->userid)) {
                        if ($type == 'all') {
                            $str .= workshop_fullname($assessment->userid, $workshop->course).': ';
                        }
                        $str .= "<a href=\"viewassessment.php?aid=$assessment->id\">"
                             . "[".number_format($assessment->grade *$workshop->grade / 100, 0)."]</a>";
                        if (workshop_is_teacher($workshop, $USER->id)) {
                            $str .= ' <a title="'.get_string('reassess', 'workshop').
                                "\" href=\"assess.php?id=$cm->id&amp;sid=$submission->id\"><img src=\"$CFG->pixpath/t/edit.gif\" ".
                                ' class="iconsmall" alt="'.get_string('reassess', 'workshop').'" /></a>';
                            $str .= ' <a title="'.get_string('delete', 'workshop').
                                "\" href=\"assessments.php?action=confirmdelete&amp;wid=$workshop->id&amp;aid=$assessment->id\"><img src=\"$CFG->pixpath/t/delete.gif\" ".
                                ' class="iconsmall" alt="'.get_string('delete', 'workshop').'" /></a><br />';
                       }
                    }
                }
            }
        }
        if ($type == 'student' or $type == 'all') {
            foreach ($assessments as $assessment) {
                if (workshop_is_student($workshop, $assessment->userid)) {
                    if ($type == 'all') {
                        $str .= workshop_fullname($assessment->userid, $workshop->course).': ';
                    }
                    $str .= "<a href=\"viewassessment.php?aid=$assessment->id\">";
                    if ($workshop->agreeassessments and !$assessment->timeagreed and 
                            workshop_is_student($workshop, $submission->userid)) { // agreement on student work only
                        $str .= "&lt;&lt;".number_format($assessment->grade * $workshop->grade / 100, 0)." (".
                            number_format($assessment->gradinggrade * $workshop->gradinggrade / 100, 0).
                            ")&gt;&gt;</a> ";
                    } elseif ($assessment->timegraded) {
                        if ($assessment->gradinggrade) {
                            $str .= "{".number_format($assessment->grade * $workshop->grade / 100, 0);
                            if ($assessment->teachergraded) {
                                $str .= " [".number_format($assessment->gradinggrade * $workshop->gradinggrade / 100, 0).
                                "]}</a> ";
                            } else {
                                $str .= " (".number_format($assessment->gradinggrade * $workshop->gradinggrade / 100, 0).
                                ")}</a> ";
                            }
                        } else {
                            $str .= "&lt;".number_format($assessment->grade * $workshop->grade / 100, 0).
                                " (0)&gt;</a> ";
                        }
                    } else {
                        $str .= "{".number_format($assessment->grade * $workshop->grade / 100, 0)."}</a> ";
                    }
                    $str .= '<br />';
                }
            }
        }
    }
    if (!$str) {
        $str = "&nbsp;";   // be kind to Mozilla browsers!
    }
    return $str;
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_submission_title($workshop, $submission) {
// Arguments are objects

    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
            error("Course Module ID was incorrect");
    }
    
    if (!$submission->timecreated) { // a "no submission"
        return $submission->title;
    }
    return "<a name=\"sid_$submission->id\" href=\"submissions.php?id=$cm->id&amp;action=showsubmission&amp;sid=$submission->id\">$submission->title</a>";
}


function workshop_print_time_to_deadline($time) {
    if ($time < 0) {
        $timetext = get_string("afterdeadline", "workshop", format_time($time));
        return " (<span class=\"redfont\">$timetext</span>)";
    } else {
        $timetext = get_string("beforedeadline", "workshop", format_time($time));
        return " ($timetext)";
    }
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_upload_form($workshop) {
    global $CFG;

    if (! $course = get_record("course", "id", $workshop->course)) {
        error("Course is misconfigured");
    }
    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $course->id)) {
        error("Course Module ID was incorrect");
    }
    $usehtmleditor = can_use_html_editor();

    echo "<div class=\"workshopuploadform\">";
    echo "<form enctype=\"multipart/form-data\" method=\"POST\" action=\"upload.php\">";
    echo "<fieldset class=\"invisiblefieldset\">";
    echo " <input type=\"hidden\" name=\"id\" value=\"$cm->id\" />";
    echo "<table celpadding=\"5\" border=\"1\" align=\"center\">\n";
    // now get the submission
    echo "<tr valign=\"top\"><td><b>". get_string("title", "workshop").":</b>\n";
    echo "<input type=\"text\" name=\"title\" size=\"60\" maxlength=\"100\" value=\"\" />\n";
    echo "</td></tr><tr><td><b>".get_string("submission", "workshop").":</b><br />\n";
    print_textarea($usehtmleditor, 25,70, 630, 400, "description");
    use_html_editor("description");
    echo "</td></tr><tr><td>\n";
    if ($workshop->nattachments) {
        require_once($CFG->dirroot.'/lib/uploadlib.php');
        for ($i=0; $i < $workshop->nattachments; $i++) {
            $iplus1 = $i + 1;
            $tag[$i] = get_string("attachment", "workshop")." $iplus1:";
        }
        upload_print_form_fragment($workshop->nattachments,null,$tag,false,null,$course->maxbytes,
                $workshop->maxbytes,false);
    }
    echo "</td></tr></table>\n";
    echo " <input type=\"submit\" name=\"save\" value=\"".get_string("submitassignment","workshop")."\" />";
    echo "</fieldset></form>";
    echo "</div>";
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_print_user_assessments($workshop, $user, &$gradinggrade) {
    // Returns the number of assessments and a hyperlinked list of grading grades for the assessments made by this user

    if (! $cm = get_coursemodule_from_instance("workshop", $workshop->id, $workshop->course)) {
            error("Course Module ID was incorrect");
    }
    $gradinggrade = 0;
    $n = 0;
    $str = '';
    if ($assessments = workshop_get_user_assessments_done($workshop, $user)) {
        foreach ($assessments as $assessment) {
            $gradinggrade += $assessment->gradinggrade;
            $n++;
            $str .= "<a href=\"viewassessment.php?aid=$assessment->id\">";
            if ($assessment->timegraded) {
                if ($assessment->gradinggrade) {
                    $str .= "{".number_format($assessment->grade * $workshop->grade / 100, 0);
                    if ($assessment->teachergraded) {
                        $str .= " [".number_format($assessment->gradinggrade * $workshop->gradinggrade / 100)."]}</a> ";
                    } else {
                        $str .= " (".number_format($assessment->gradinggrade * $workshop->gradinggrade / 100).")}</a> ";
                    }
                } else {
                    $str .= "&lt;".number_format($assessment->grade * $workshop->grade / 100, 0)." (0)&gt;</a> ";
                }
            } else {
                $str .= "{".number_format($assessment->grade * $workshop->grade / 100, 0)." (-)}</a> ";
            }
            $str .= '<br />';
        }
    }
    else {
        $str ="0";
    }
    if ($n = max($n, $workshop->ntassessments + $workshop->nsassessments)) {
        $gradinggrade = number_format($gradinggrade/$n * $workshop->gradinggrade / 100, 1);
    }
    
    return $str;
}


//////////////////////////////////////////////////////////////////////////////////////
function workshop_test_user_assessments($workshop, $user) {
    // see if user has assessed required number of assessments of teachers submissions...
    global $CFG;
    
    $result = true;
    $n = 0;
    $timenow =time();
    if ($submissions = workshop_get_teacher_submissions($workshop)) {
        foreach ($submissions as $submission) {
            if ($assessment = workshop_get_submission_assessment($submission, $user)) {
                // ...the date stamp on the assessment should be in the past 
                if ($assessment->timecreated < $timenow) {
                    $n++;
                }
            }
        }
        if ($n < min($workshop->ntassessments, workshop_count_teacher_submissions($workshop))) {
            $result = false; 
        }
    }
    return $result;
}
    

?>