<?php

// +-------------------------------------------------+
// © 2002-2010 PMB Services / www.sigb.net pmb@sigb.net et contributeurs (voir www.sigb.net)
// +-------------------------------------------------+
// $Id: map_layer_model.class.php,v 1.13 2019/04/12 15:24:06 tsamson Exp $

if (stristr($_SERVER['REQUEST_URI'], ".class.php"))
    die("no access");
require_once($class_path . "/map/map_hold.class.php");
require_once($class_path . "/map/map_hold_polygon.class.php");
require_once($class_path . "/map/map_hold_point.class.php");
require_once($class_path . "/map/map_hold_multipolygon.class.php");
require_once($class_path . "/map/map_hold_multilinestring.class.php");
require_once($class_path . "/map/map_hold_linestring.class.php");
require_once($class_path . "/map/map_coord.class.php");

/**
 * class map_layer_model
 * 
 */
class map_layer_model {
    /** Aggregations: */
    /** Compositions: */
    /*     * * Attributes: ** */

    /**
     * Tableau des emprises, l'identifiant de l'objet est la clé
     * @access protected
     */
    protected $holds;

    /**
     * Tableau des identifiants des objets contenant des emprises
     * @access protected
     */
    protected $ids = array();

    /**
     * 
     * @access protected
     */
    protected $bounding_box;

    /**
     *
     * @access protected
     */
    protected $color = "";

    /**
     * 
     *
     * @param Array() ids Tableau des identifiants des objets contenant des emprises

     * @return void
     * @access public
     */
    public function __construct($ids) {

        if (!isset($ids[0]))
            $ids = array();
        $this->ids = $ids;

        $this->fetch_datas();
    }
// end of member function __construct

    /**
     * Retourne l'emprise normalisé minimal pour afficher toutes les emprises
     *
     * @return map_hold
     * @access public
     */
    public function get_bounding_box() {
        global $dbh;

        if (!$this->bounding_box) {
            //on teste la manière forte !
            $collection = $global_collection = "";
            $i = 0;
            foreach ($this->holds as $hold) {
                if ($collection)
                    $collection.=",";
                $collection.=$hold->get_wkt();
                $i++;
                if ($i == 500) {
                    $query = "select astext(envelope(geomfromtext('geometrycollection(" . $collection . ")'))) as bounding_box";
                    $result = pmb_mysql_query($query, $dbh) or die(pmb_mysql_error());
                    if (pmb_mysql_num_rows($result)) {
                        if ($global_collection)
                            $global_collection.=",";
                        $global_collection.= pmb_mysql_result($result, 0, 0);
                    }
                    $i = 0;
                    $collection = "";
                }
            }

            if ($collection) {
                $query = "select astext(envelope(geomfromtext('geometrycollection(" . $collection . ")'))) as bounding_box";
                $result = pmb_mysql_query($query, $dbh) or die(pmb_mysql_error());
                if (pmb_mysql_num_rows($result)) {
                    if ($global_collection)
                        $global_collection.=",";
                    $global_collection.= pmb_mysql_result($result, 0, 0);
                }
            }

            if ($global_collection) {
                $query = "select astext(envelope(geomfromtext('geometrycollection(" . $global_collection . ")'))) as bounding_box";
                $result = pmb_mysql_query($query, $dbh) or die(pmb_mysql_error());
                if (pmb_mysql_num_rows($result)) {
                    $this->bounding_box = new map_hold_polygon("bounding", 0, pmb_mysql_result($result, 0, 0));
                }
            }

            if (!$this->bounding_box) {
                return false;
            }
        }
        return $this->bounding_box;
    }
// end of member function get_bounding_box

    /**
     * appelle toutes les emprises normalisée des emprises courantes pour calculer
     * l'emprise minimum nécessaire pour afficher toutes les emprises associées aux
     * objets courants
     *
     * @return void
     * @access protected
     */
    protected function calc_bounding_box() {
        
    }

// end of member function calc_bounding_box

    public function get_holds() {
        return $this->holds;
    }

    public function get_informations() {
        return array(
            'type' => $this->get_layer_model_type(),
            'name' => $this->get_layer_model_name(),
            'color' => $this->color,
            'field_id' => $this->get_layer_model_type() . "_hidden_field"
        );
    }

    public function have_results() {
        if (count($this->holds)) {
            return true;
        }
        return false;
    }
}

// end of map_layer_model