<?php

// +-------------------------------------------------+
// © 2002-2010 PMB Services / www.sigb.net pmb@sigb.net et contributeurs (voir www.sigb.net)
// +-------------------------------------------------+
// $Id: map_hold_polygon.class.php,v 1.11 2019/02/26 15:58:50 tsamson Exp $

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

/**
 * class map_hold_polygon
 * 
 */
//TODO, la présence d'un deuxième polygone n'est un autre mais un trou dans le premier
class map_hold_polygon extends map_hold {
    /** Aggregations: */
    /** Compositions: */
    /*     * * Attributes: ** */

    /**
     * Multipolygon
     * @access protected
     */
    protected $multiple = false;

    /**
     *
     *
     * @return string
     * @access public
     */
    public function get_hold_type() {

        return "POLYGON";
    }

// end of member function get_hold_type

    protected function build_coords() {
        $coords_string = substr($this->wkt, strpos($this->wkt, "(") + 1, -1);
        //s'agit-il d'un multi-polygon ?
        if (strpos($coords_string, "),(") !== false)
            $this->multiple = true;
        if ($this->multiple) {
            $coords_multiple_string = substr($coords_string, strpos($coords_string, "(") + 1, -1);
            $polygons = explode("),(", $coords_multiple_string);
            foreach ($polygons as $polygon) {
                $coords = explode(",", $polygon);
                $coords_polygon = array();
                for ($i = 0; $i < count($coords); $i++) {
                    $infos = array();
                    $coord = $coords[$i];
                    $infos = explode(" ", $coord);
                    //on ne met pas la dernière coordonnée, c'est la même que la 1ere
                    if (0 == $i || $coords[0] != $coords[$i]) {
                        $coords_polygon[] = new map_coord($infos[0], $infos[1]);
                    }
                }
                $this->coords[] = $coords_polygon;
            }
        } else {
            $coords_string = str_replace(array("(", ")"), "", $coords_string);
            $coords = explode(",", $coords_string);
            $this->coords = array();
            for ($i = 0; $i < count($coords); $i++) {
                $infos = array();
                $coord = $coords[$i];
                $infos = explode(" ", $coord);
                //on ne met pas la dernière coordonnée
                if ($i < (count($coords) - 1)) {
                    $this->coords[] = new map_coord($infos[0], $infos[1]);
                }
            }
        }
        $this->coords_uptodate = true;
    }

    protected function build_transcription() {
        $this->transcription = "(";
        if ($this->coords[0]->get_decimal_long() >= 0)
            $this->transcription.="E ";
        else
            $this->transcription.="W ";
        $this->transcription.=map_coord::convert_decimal_to_sexagesimal($this->coords[0]->get_decimal_long());
        $this->transcription.=" - ";
        if ($this->coords[1]->get_decimal_long() >= 0)
            $this->transcription.="E ";
        else
            $this->transcription.="W ";
        $this->transcription.=map_coord::convert_decimal_to_sexagesimal($this->coords[1]->get_decimal_long());
        $this->transcription.=" / ";
        if ($this->coords[2]->get_decimal_lat() >= 0)
            $this->transcription.="N ";
        else
            $this->transcription.="S ";
        $this->transcription.=map_coord::convert_decimal_to_sexagesimal($this->coords[2]->get_decimal_lat());
        $this->transcription.=" - ";
        if ($this->coords[0]->get_decimal_lat() >= 0)
            $this->transcription.="N ";
        else
            $this->transcription.="S ";
        $this->transcription.=map_coord::convert_decimal_to_sexagesimal($this->coords[0]->get_decimal_lat());
        $this->transcription.=")";
    }

    protected function build_wkt() {
        $this->wkt = $this->get_hold_type() . "(";
        if ($this->multiple) {
            $tmp_wkt = "";
            foreach ($this->coords as $polygon) {
                if ($tmp_wkt == "")
                    $tmp_wkt = "(";
                else
                    $tmp_wkt .= ",(";
                foreach ($polygon as $coord) {
                    $tmp_wkt.= $coord->get_decimal_lat() . " " . $coord->get_decimal_long() . ",";
                }
                $tmp_wkt.= $polygon[0]->get_decimal_lat() . " " . $polygon[0]->get_decimal_long();
                $tmp_wkt .= ")";
            }
            $this->wkt .= $tmp_wkt;
        } else {
            $this->wkt .= "(";
            foreach ($this->coords as $coord) {
                $this->wkt.= $coord->get_decimal_lat() . " " . $coord->get_decimal_long() . ",";
            }
            $this->wkt.= $this->coords[0]->get_decimal_lat() . " " . $this->coords[0]->get_decimal_long() . ")";
        }
        $this->wkt .= ")";
        $this->wkt_uptodate = true;
    }
}

// end of map_hold_polygon