WebSVN – eFlore/Applications.cel – /trunk/jrest/bibliotheque/CartoGroupage.php

<?php
// declare(encoding='UTF-8');
/**
 * Classe de groupage des obs par quadtree pour la carto.
 *
 * @internal   Mininum PHP version : 5.2
 * @category   CEL
 * @package    Services
 * @subpackage Bibliothèques
 * @version    0.1
 * @author     Mathias CHOUET <mathias@tela-botanica.org>
 * @author     Jean-Pascal MILCENT <jpm@tela-botanica.org>
 * @author     Aurelien PERONNET <aurelien@tela-botanica.org>
 * @license    GPL v3 <http://www.gnu.org/licenses/gpl.txt>
 * @license    CECILL v2 <http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt>
 * @copyright  1999-2014 Tela Botanica <accueil@tela-botanica.org>
 */
class CartoGroupage {
        const MARQUEUR_GROUPE = 'GROUPE';
        const MARQUEUR_COMMUNE = 'COMMUNE';
        const MARQUEUR_STATION = 'STATION';

        private static $seuilClusterisation = 200;
        private static $zoomDefaut = 3;
        private static $zoomMaxClustering = 12;
        private static $pasZoomDefaut = 1;
        private static $pasZoomMaxClustering = 0.05;
        private static $profondeurMin = 0;
        private static $profondeurMax = 8;

        private static $pasCorrectionCentre = null;
        private static $coefficientReductionPas = null;
        private static $coefficientProfondeurMax = null;

        private static $nbElements = array('stations' => 0,'communes' => 0, 'points' => 0);
        private static $listeNoeudsSelectionnes = array();
        private static $bornesMax = array('latMin' => null, 'lngMin' => null, 'latMax' => null, 'lngMax' => null);
        private static $id_traites = array();
        /*
          +---------+---------+
          |         |         |
          |    A    |    B    |
          |         |         |
          +---------*---------+
          |         |         |
          |    D    |    C    |
          |         |         |
          +---------+---------+

          Quatres cadrans sont considérés par le quad tree
          * = centre de la fenetre
         */
        public static function creerGroupesQuadtree(&$markers, $neLat, $neLng, $swLat, $swLng, $zoom = 3) {
                if (count($markers) > self::$seuilClusterisation) {
                        self::calculerProfondeurMax($zoom);
                        self::calculerPasCorrectionCentre($zoom);

                        $noeudRacine = array('nbrePoints' => count($markers), 'points' => $markers);
                        self::attribuerAuCadran($noeudRacine, $neLat, $neLng, $swLat, $swLng);
                } else {
                        foreach ($markers as &$marker) {
                                if (!self::estUnPointAExclure($marker)) {
                                        $emplacement = self::formaterPointPourAjout($marker);
                                        self::mettreAJourBornes($marker);
                                        $points = array($marker);
                                        $noeudSimple = array('points' => $points, 'nbrePoints' => 1);
                                        self::$nbElements[$emplacement]++;
                                        self::$listeNoeudsSelectionnes[] = self::ajouterGroupeOuPoint($noeudSimple);
                                }
                                self::$nbElements['points']++;
                        }
                }
                return self::$listeNoeudsSelectionnes;
        }

        private function calculerCoefficientReductionPas() {
                if (self::$coefficientReductionPas == null) {
                        self::$coefficientReductionPas = (self::$pasZoomMaxClustering - self::$pasZoomDefaut)/(self::$zoomMaxClustering - self::$zoomDefaut);
                }
                return self::$coefficientReductionPas;
        }

        private function calculerPasCorrectionCentre($zoom) {
                self::$pasCorrectionCentre = ($zoom - self::$zoomDefaut) * self::calculerCoefficientReductionPas() + self::$pasZoomDefaut;
        }

        private function calculerCoefficientProfondeurMax() {
                if (self::$coefficientProfondeurMax == null) {
                        self::$coefficientProfondeurMax = (self::$profondeurMax - self::$profondeurMin)/(self::$zoomMaxClustering - self::$zoomDefaut);
                }
                return self::$coefficientProfondeurMax;
        }

        private function calculerProfondeurMax($zoom) {
                if ($zoom > self::$zoomDefaut) {
                        self::$profondeurMax = round(($zoom - self::$zoomDefaut) * self::calculerCoefficientProfondeurMax() + self::$profondeurMin,0);
                } else {
                        self::$profondeurMax = 1;
                }
        }

        public static function getNbElements() {
                return self::$nbElements;
        }

        public static function mettreAJourBornes(&$point) {
                if (!is_numeric($point['lat']) || abs($point['lat']) > 90) return;
                if (!is_numeric($point['lng']) || abs($point['lng']) > 180) return;

                self::$bornesMax['latMin'] = ($point['lat'] < self::$bornesMax['latMin'] || self::$bornesMax['latMin'] == null) ? $point['lat'] : self::$bornesMax['latMin'] ;
                self::$bornesMax['lngMin'] = ($point['lng'] < self::$bornesMax['lngMin'] || self::$bornesMax['lngMin'] == null) ? $point['lng'] : self::$bornesMax['lngMin'] ;
                self::$bornesMax['latMax'] = ($point['lat'] > self::$bornesMax['latMax'] || self::$bornesMax['latMax'] == null) ? $point['lat'] : self::$bornesMax['latMax'] ;
                self::$bornesMax['lngMax'] = ($point['lng'] > self::$bornesMax['lngMax'] || self::$bornesMax['lngMax'] == null) ? $point['lng'] : self::$bornesMax['lngMax'] ;
        }

        public static function getBornes() {
                return self::$bornesMax;
        }

        /**
         *
         * @param mixed $noeud Le noeud à traiter par le quadtree
         * @param float $neLat Latitude du coin nord est de la fenetre
         * @param float $neLng Longitude du coin nord est de la fenetre
         * @param float $swLat Latitude du coin sud ouest de la fenetre
         * @param float $swLng Longitude du coin sud ouest de la fenetre
         * @param int $profondeur profondeur courante de l'arbre
         */
        private static function attribuerAuCadran(&$noeud, $neLat, $neLng, $swLat, $swLng, $profondeur = 0) {
                $latCentre = round((($neLat+$swLat)/2)/self::$pasCorrectionCentre,0)*self::$pasCorrectionCentre;
                $lngCentre = round((($neLng+$swLng)/2)/self::$pasCorrectionCentre,0)*self::$pasCorrectionCentre;

                foreach ($noeud['points'] as &$point) {
                        if(!self::estUnPointAExclure($point)) {
                                $emplacement = self::formaterPointPourAjout($point);
                                self::mettreAJourBornes($point);
                                $cadran = self::obtenirCadranPourPoint($latCentre, $lngCentre, $point);
                                self::ajouterFils($noeud,$cadran,$point);
                                // Les stations ne doivent être comptées que la première fois !
                                if ($emplacement != 'stations' || $profondeur == 0) {
                                        self::$nbElements[$emplacement]++;
                                }
                        }
                        self::$nbElements['points']++;
                }

                $profondeur++;

                if($profondeur <= self::$profondeurMax) {
                        (isset($noeud['A']) && $noeud['A'] != null) ? self::attribuerAuCadran($noeud['A'], $neLat, $lngCentre , $latCentre, $swLng, $profondeur) : '';
                        (isset($noeud['B']) && $noeud['B'] != null) ? self::attribuerAuCadran($noeud['B'], $neLat, $neLng, $latCentre, $lngCentre, $profondeur) : '';
                        (isset($noeud['C']) && $noeud['C'] != null) ? self::attribuerAuCadran($noeud['C'], $latCentre, $neLng, $swLat, $lngCentre, $profondeur) : '';
                        (isset($noeud['D']) && $noeud['D'] != null) ? self::attribuerAuCadran($noeud['D'], $latCentre, $lngCentre, $swLat, $swLng, $profondeur) : '';
                }

                if(self::estUnParentFeuilles($noeud)) {
                        self::$listeNoeudsSelectionnes[] = self::ajouterGroupeOuPoint($noeud);
                }
        }

        private static function estUnPointAExclure(&$point) {
                return self::estSensible($point) &&
                self::coordonneesCommuneSontNulles($point);
        }

        private static function coordonneesCommuneSontNulles(&$point) {
                $coord_nulles = ($point['wgs84_latitude'] == null ||
                $point['wgs84_latitude'] == '' ||
                $point['wgs84_longitude'] == null ||
                $point['wgs84_longitude'] == '');
                return $coord_nulles;
        }

        private static function coordonneesSontNulles(&$point) {
                $coord_nulles = ($point['latitude'] == '000null' ||
                        $point['latitude'] == 0 ||
                        $point['latitude'] == '' ||
                        $point['longitude'] == '000null' ||
                        $point['longitude'] == 0 ||
                        $point['longitude'] == '');
                return $coord_nulles;
        }

        private static function estSensible(&$point) {
                $sensible = isset($point['mots_cles_texte']) && substr_count(strtolower($point['mots_cles_texte']), 'sensible') != 0;
                return $sensible;
        }

        private static function formaterNomStation(&$point, $type_emplacement) {
                $station = '';
                if ($type_emplacement == 'stations' && $point['station'] != '' && $point['station'] != '000null') {
                        $station = $point['station'];
                } else {
                        $id_zone_geo = $point['ce_zone_geo'];
                        $station = $point['zone_geo'].(($id_zone_geo != '' && $id_zone_geo != '000null') ? ' ('.self::formaterNomZoneGeo($id_zone_geo).')' : '');
                }

                return $station;
        }

        private static function formaterNomZoneGeo($zone_geo) {
                $zone_geo = str_replace('INSEE-C:', '', $zone_geo);
                $zone_geo = strlen($zone_geo) >= 2 ? substr($zone_geo, 0, 2) : $zone_geo;
                return $zone_geo;
        }

        private static function formaterPointPourAjout(&$point) {
                if (isset($point['type_emplacement'])) {
                        return $point['type_emplacement'];
                }

                if (self::coordonneesSontNulles($point) || self::estSensible($point)) {
                        $point_allege = array();
                        $point_allege['id'] = self::MARQUEUR_COMMUNE.':'.$point['wgs84_latitude'].'|'.$point['wgs84_longitude'];
                        $point_allege['type_emplacement'] = 'communes';
                        $point_allege['nom'] = self::formaterNomStation($point, 'communes');
                        $point_allege['lat'] = (float)$point['wgs84_latitude'];
                        $point_allege['lng'] = (float)$point['wgs84_longitude'];
                        $point_allege['zonegeo'] = $point['ce_zone_geo'];

                        $point = $point_allege;
                } else {
                        $point_allege = array();
                        $point_allege['id'] = self::MARQUEUR_STATION.':'.$point['latitude'].'|'.$point['longitude'];
                        $point_allege['type_emplacement'] = 'stations';
                        $point_allege['nom'] = self::formaterNomStation($point, 'stations');
                        $point_allege['lat'] = (float)$point['latitude'];
                        $point_allege['lng'] = (float)$point['longitude'];
                        $point_allege['zonegeo'] = $point['ce_zone_geo'];

                        $point = $point_allege;
                }
                return $point['type_emplacement'];
        }

        private function obtenirCadranPourPoint($latCentre,$lngCentre, &$point) {
                if ($point['lng'] < $lngCentre) {
                        if ($point['lat'] > $latCentre) {
                                        $cadran = 'A';
                                } else {
                                        $cadran = 'D';
                                }
                } else {
                        if ($point['lat'] > $latCentre) {
                                $cadran = 'B';
                        } else {
                                $cadran = 'C';
                        }
                }
                return $cadran;
        }

        private static function ajouterFils(&$noeud, $cadran, &$point) {
                if(!isset($noeud[$cadran])) {
                        $noeud[$cadran] = array('points' => array(),'nbrePoints' => 0, 'latMoyenne' => 0, 'lngMoyenne' => 0);
                }
                $noeud[$cadran]['points'][] = $point;
                $noeud[$cadran]['nbrePoints']++;
                $noeud[$cadran]['latMoyenne'] += $point['lat'];
                $noeud[$cadran]['lngMoyenne'] += $point['lng'];
        }

        private static function ajouterGroupeOuPoint(&$noeud) {
                $groupe = array();
                if ($noeud['nbrePoints'] > 1 && isset($noeud['latMoyenne']) && isset($noeud['lngMoyenne'])) {
                        $groupe['lat'] = $noeud['latMoyenne']/$noeud['nbrePoints'];
                        $groupe['lng'] = $noeud['lngMoyenne']/$noeud['nbrePoints'];
                        $groupe['id'] = 'GROUPE:'.$groupe['lat'].';'.$groupe['lng'];
                        $groupe['nbreMarqueur'] = $noeud['nbrePoints'];
                } else {
                        $groupe = $noeud['points'][0];
                }
                return $groupe;
        }

        private static function estUnParentFeuilles(&$noeud) {
                return  self::estUneFeuille($noeud['A']) &&
                                self::estUneFeuille($noeud['B']) &&
                                self::estUneFeuille($noeud['C']) &&
                                self::estUneFeuille($noeud['D']);
        }

        private static function estUneFeuille(&$noeud) {
                return $noeud == null ||
                (!isset($noeud['A']) || $noeud['A'] == null) &&
                (!isset($noeud['B']) || $noeud['B'] == null) &&
                (!isset($noeud['C']) || $noeud['C'] == null) &&
                (!isset($noeud['D']) || $noeud['D'] == null);
        }
}
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