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977 jpm 1 
<?php
2460 jpm 2 
// declare(encoding='UTF-8');
3 
/**
4 
 * Classe de groupage des obs par quadtree pour la carto.
5 
 *
6 
 * @internal   Mininum PHP version : 5.2
7 
 * @category   CEL
8 
 * @package    Services
9 
 * @subpackage Bibliothèques
10 
 * @version    0.1
11 
 * @author     Mathias CHOUET <mathias@tela-botanica.org>
12 
 * @author     Jean-Pascal MILCENT <jpm@tela-botanica.org>
13 
 * @author     Aurelien PERONNET <aurelien@tela-botanica.org>
14 
 * @license    GPL v3 <http://www.gnu.org/licenses/gpl.txt>
15 
 * @license    CECILL v2 <http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt>
16 
 * @copyright  1999-2014 Tela Botanica <accueil@tela-botanica.org>
17 
 */
977 jpm 18 
class CartoGroupage {
1142 aurelien 19 
	const MARQUEUR_GROUPE = 'GROUPE';
20 
	const MARQUEUR_COMMUNE = 'COMMUNE';
21 
	const MARQUEUR_STATION = 'STATION';
1585 jpm 22 
 
1032 aurelien 23 
	private static $seuilClusterisation = 200;
978 jpm 24 
	private static $zoomDefaut = 3;
25 
	private static $zoomMaxClustering = 12;
26 
	private static $pasZoomDefaut = 1;
27 
	private static $pasZoomMaxClustering = 0.05;
28 
	private static $profondeurMin = 0;
29 
	private static $profondeurMax = 8;
1585 jpm 30 
 
978 jpm 31 
	private static $pasCorrectionCentre = null;
1585 jpm 32 
	private static $coefficientReductionPas = null;
978 jpm 33 
	private static $coefficientProfondeurMax = null;
1585 jpm 34 
 
1172 aurelien 35 
	private static $nbElements = array('stations' => 0,'communes' => 0, 'points' => 0);
1585 jpm 36 
	private static $listeNoeudsSelectionnes = array();
1106 aurelien 37 
	private static $bornesMax = array('latMin' => null, 'lngMin' => null, 'latMax' => null, 'lngMax' => null);
1142 aurelien 38 
	private static $id_traites = array();
978 jpm 39 
	/*
40 
	  +---------+---------+
41 
	  |         |         |
42 
	  |    A    |    B    |
43 
	  |         |         |
44 
	  +---------*---------+
45 
	  |         |         |
46 
	  |    D    |    C    |
47 
	  |         |         |
48 
	  +---------+---------+
1585 jpm 49 
 
978 jpm 50 
	  Quatres cadrans sont considérés par le quad tree
1585 jpm 51 
	  * = centre de la fenetre
978 jpm 52 
	 */
979 jpm 53 
	public static function creerGroupesQuadtree(&$markers, $neLat, $neLng, $swLat, $swLng, $zoom = 3) {
1585 jpm 54 
		if (count($markers) > self::$seuilClusterisation) {
978 jpm 55 
			self::calculerProfondeurMax($zoom);
56 
			self::calculerPasCorrectionCentre($zoom);
57 
 
58 
			$noeudRacine = array('nbrePoints' => count($markers), 'points' => $markers);
1585 jpm 59 
			self::attribuerAuCadran($noeudRacine, $neLat, $neLng, $swLat, $swLng);
1004 jpm 60 
		} else {
2460 jpm 61 
			foreach ($markers as &$marker) {
62 
				if (!self::estUnPointAExclure($marker)) {
1585 jpm 63 
					$emplacement = self::formaterPointPourAjout($marker);
64 
					self::mettreAJourBornes($marker);
1142 aurelien 65 
					$points = array($marker);
66 
					$noeudSimple = array('points' => $points, 'nbrePoints' => 1);
67 
					self::$nbElements[$emplacement]++;
68 
					self::$listeNoeudsSelectionnes[] = self::ajouterGroupeOuPoint($noeudSimple);
69 
				}
1172 aurelien 70 
				self::$nbElements['points']++;
977 jpm 71 
			}
978 jpm 72 
		}
73 
		return self::$listeNoeudsSelectionnes;
74 
	}
1585 jpm 75 
 
978 jpm 76 
	private function calculerCoefficientReductionPas() {
2460 jpm 77 
		if (self::$coefficientReductionPas == null) {
978 jpm 78 
			self::$coefficientReductionPas = (self::$pasZoomMaxClustering - self::$pasZoomDefaut)/(self::$zoomMaxClustering - self::$zoomDefaut);
977 jpm 79 
		}
978 jpm 80 
		return self::$coefficientReductionPas;
977 jpm 81 
	}
1585 jpm 82 
 
978 jpm 83 
	private function calculerPasCorrectionCentre($zoom) {
84 
		self::$pasCorrectionCentre = ($zoom - self::$zoomDefaut) * self::calculerCoefficientReductionPas() + self::$pasZoomDefaut;
977 jpm 85 
	}
1585 jpm 86 
 
978 jpm 87 
	private function calculerCoefficientProfondeurMax() {
2460 jpm 88 
		if (self::$coefficientProfondeurMax == null) {
978 jpm 89 
			self::$coefficientProfondeurMax = (self::$profondeurMax - self::$profondeurMin)/(self::$zoomMaxClustering - self::$zoomDefaut);
977 jpm 90 
		}
978 jpm 91 
		return self::$coefficientProfondeurMax;
977 jpm 92 
	}
1585 jpm 93 
 
94 
	private function calculerProfondeurMax($zoom) {
2460 jpm 95 
		if ($zoom > self::$zoomDefaut) {
1032 aurelien 96 
			self::$profondeurMax = round(($zoom - self::$zoomDefaut) * self::calculerCoefficientProfondeurMax() + self::$profondeurMin,0);
977 jpm 97 
		} else {
978 jpm 98 
			self::$profondeurMax = 1;
977 jpm 99 
		}
100 
	}
1585 jpm 101 
 
979 jpm 102 
	public static function getNbElements() {
103 
		return self::$nbElements;
104 
	}
1585 jpm 105 
 
1106 aurelien 106 
	public static function mettreAJourBornes(&$point) {
1585 jpm 107 
		if (!is_numeric($point['lat']) || abs($point['lat']) > 90) return;
108 
		if (!is_numeric($point['lng']) || abs($point['lng']) > 180) return;
109 
 
1142 aurelien 110 
		self::$bornesMax['latMin'] = ($point['lat'] < self::$bornesMax['latMin'] || self::$bornesMax['latMin'] == null) ? $point['lat'] : self::$bornesMax['latMin'] ;
111 
		self::$bornesMax['lngMin'] = ($point['lng'] < self::$bornesMax['lngMin'] || self::$bornesMax['lngMin'] == null) ? $point['lng'] : self::$bornesMax['lngMin'] ;
112 
		self::$bornesMax['latMax'] = ($point['lat'] > self::$bornesMax['latMax'] || self::$bornesMax['latMax'] == null) ? $point['lat'] : self::$bornesMax['latMax'] ;
113 
		self::$bornesMax['lngMax'] = ($point['lng'] > self::$bornesMax['lngMax'] || self::$bornesMax['lngMax'] == null) ? $point['lng'] : self::$bornesMax['lngMax'] ;
1106 aurelien 114 
	}
1585 jpm 115 
 
1106 aurelien 116 
	public static function getBornes() {
117 
		return self::$bornesMax;
118 
	}
1585 jpm 119 
 
978 jpm 120 
	/**
1585 jpm 121 
	 *
978 jpm 122 
	 * @param mixed $noeud Le noeud à traiter par le quadtree
1585 jpm 123 
	 * @param float $neLat Latitude du coin nord est de la fenetre
124 
	 * @param float $neLng Longitude du coin nord est de la fenetre
125 
	 * @param float $swLat Latitude du coin sud ouest de la fenetre
126 
	 * @param float $swLng Longitude du coin sud ouest de la fenetre
978 jpm 127 
	 * @param int $profondeur profondeur courante de l'arbre
128 
	 */
129 
	private static function attribuerAuCadran(&$noeud, $neLat, $neLng, $swLat, $swLng, $profondeur = 0) {
130 
		$latCentre = round((($neLat+$swLat)/2)/self::$pasCorrectionCentre,0)*self::$pasCorrectionCentre;
131 
		$lngCentre = round((($neLng+$swLng)/2)/self::$pasCorrectionCentre,0)*self::$pasCorrectionCentre;
1585 jpm 132 
 
133 
		foreach ($noeud['points'] as &$point) {
1142 aurelien 134 
			if(!self::estUnPointAExclure($point)) {
1585 jpm 135 
				$emplacement = self::formaterPointPourAjout($point);
136 
				self::mettreAJourBornes($point);
979 jpm 137 
				$cadran = self::obtenirCadranPourPoint($latCentre, $lngCentre, $point);
138 
				self::ajouterFils($noeud,$cadran,$point);
1142 aurelien 139 
				self::$nbElements[$emplacement]++;
140 
			}
1172 aurelien 141 
			self::$nbElements['points']++;
977 jpm 142 
		}
1585 jpm 143 
 
977 jpm 144 
		$profondeur++;
1585 jpm 145 
 
1032 aurelien 146 
		if($profondeur <= self::$profondeurMax) {
147 
			(isset($noeud['A']) && $noeud['A'] != null) ? self::attribuerAuCadran($noeud['A'], $neLat, $lngCentre , $latCentre, $swLng, $profondeur) : '';
148 
			(isset($noeud['B']) && $noeud['B'] != null) ? self::attribuerAuCadran($noeud['B'], $neLat, $neLng, $latCentre, $lngCentre, $profondeur) : '';
149 
			(isset($noeud['C']) && $noeud['C'] != null) ? self::attribuerAuCadran($noeud['C'], $latCentre, $neLng, $swLat, $lngCentre, $profondeur) : '';
150 
			(isset($noeud['D']) && $noeud['D'] != null) ? self::attribuerAuCadran($noeud['D'], $latCentre, $lngCentre, $swLat, $swLng, $profondeur) : '';
977 jpm 151 
		}
1585 jpm 152 
 
978 jpm 153 
		if(self::estUnParentFeuilles($noeud)) {
154 
			self::$listeNoeudsSelectionnes[] = self::ajouterGroupeOuPoint($noeud);
977 jpm 155 
		}
156 
	}
1585 jpm 157 
 
1142 aurelien 158 
	private static function estUnPointAExclure(&$point) {
1585 jpm 159 
		return self::estSensible($point) &&
1142 aurelien 160 
		self::coordonneesCommuneSontNulles($point);
161 
	}
1585 jpm 162 
 
1142 aurelien 163 
	private static function coordonneesCommuneSontNulles(&$point) {
164 
		$coord_nulles = ($point['wgs84_latitude'] == null ||
165 
		$point['wgs84_latitude'] == '' ||
166 
		$point['wgs84_longitude'] == null ||
167 
		$point['wgs84_longitude'] == '');
168 
		return $coord_nulles;
169 
	}
1585 jpm 170 
 
1142 aurelien 171 
	private static function coordonneesSontNulles(&$point) {
1409 aurelien 172 
		$coord_nulles = ($point['latitude'] == '000null' ||
2460 jpm 173 
			$point['latitude'] == 0 ||
174 
			$point['latitude'] == '' ||
175 
			$point['longitude'] == '000null' ||
176 
			$point['longitude'] == 0 ||
177 
			$point['longitude'] == '');
1142 aurelien 178 
		return $coord_nulles;
179 
	}
1585 jpm 180 
 
1142 aurelien 181 
	private static function estSensible(&$point) {
1483 aurelien 182 
		$sensible = isset($point['mots_cles_texte']) && substr_count(strtolower($point['mots_cles_texte']), 'sensible') != 0;
1142 aurelien 183 
		return $sensible;
184 
	}
1585 jpm 185 
 
1341 aurelien 186 
	private static function formaterNomStation(&$point, $type_emplacement) {
1142 aurelien 187 
		$station = '';
2460 jpm 188 
		if ($type_emplacement == 'stations' && $point['station'] != '' && $point['station'] != '000null') {
1142 aurelien 189 
			$station = $point['station'];
190 
		} else {
1585 jpm 191 
			$id_zone_geo = $point['ce_zone_geo'];
1472 aurelien 192 
			$station = $point['zone_geo'].(($id_zone_geo != '' && $id_zone_geo != '000null') ? ' ('.self::formaterNomZoneGeo($id_zone_geo).')' : '');
1032 aurelien 193 
		}
1585 jpm 194 
 
1142 aurelien 195 
		return $station;
1032 aurelien 196 
	}
1585 jpm 197 
 
1339 aurelien 198 
	private static function formaterNomZoneGeo($zone_geo) {
199 
		$zone_geo = str_replace('INSEE-C:', '', $zone_geo);
200 
		$zone_geo = strlen($zone_geo) >= 2 ? substr($zone_geo, 0, 2) : $zone_geo;
201 
		return $zone_geo;
202 
	}
1585 jpm 203 
 
1142 aurelien 204 
	private static function formaterPointPourAjout(&$point) {
2460 jpm 205 
		if (isset($point['type_emplacement'])) {
1142 aurelien 206 
			return $point['type_emplacement'];
207 
		}
1585 jpm 208 
 
2460 jpm 209 
		if (self::coordonneesSontNulles($point) || self::estSensible($point)) {
1144 aurelien 210 
			$point_allege = array();
211 
			$point_allege['id'] = self::MARQUEUR_COMMUNE.':'.$point['wgs84_latitude'].'|'.$point['wgs84_longitude'];
212 
			$point_allege['type_emplacement'] = 'communes';
1341 aurelien 213 
			$point_allege['nom'] = self::formaterNomStation($point, 'communes');
1144 aurelien 214 
			$point_allege['lat'] = (float)$point['wgs84_latitude'];
215 
			$point_allege['lng'] = (float)$point['wgs84_longitude'];
2170 mathias 216 
			$point_allege['zonegeo'] = $point['ce_zone_geo'];
1585 jpm 217 
 
1144 aurelien 218 
			$point = $point_allege;
1142 aurelien 219 
		} else {
220 
			$point_allege = array();
1339 aurelien 221 
			$point_allege['id'] = self::MARQUEUR_STATION.':'.$point['latitude'].'|'.$point['longitude'];
1142 aurelien 222 
			$point_allege['type_emplacement'] = 'stations';
1341 aurelien 223 
			$point_allege['nom'] = self::formaterNomStation($point, 'stations');
1339 aurelien 224 
			$point_allege['lat'] = (float)$point['latitude'];
2179 mathias 225 
			$point_allege['lng'] = (float)$point['longitude'];
2170 mathias 226 
			$point_allege['zonegeo'] = $point['ce_zone_geo'];
1585 jpm 227 
 
1142 aurelien 228 
			$point = $point_allege;
229 
		}
230 
		return $point['type_emplacement'];
231 
	}
1585 jpm 232 
 
978 jpm 233 
	private function obtenirCadranPourPoint($latCentre,$lngCentre, &$point) {
234 
		if ($point['lng'] < $lngCentre) {
235 
			if ($point['lat'] > $latCentre) {
236 
					$cadran = 'A';
237 
				} else {
238 
					$cadran = 'D';
239 
				}
240 
		} else {
241 
			if ($point['lat'] > $latCentre) {
242 
				$cadran = 'B';
243 
			} else {
244 
				$cadran = 'C';
245 
			}
1585 jpm 246 
		}
978 jpm 247 
		return $cadran;
248 
	}
1585 jpm 249 
 
1003 jpm 250 
	private static function ajouterFils(&$noeud, $cadran, &$point) {
1032 aurelien 251 
		if(!isset($noeud[$cadran])) {
252 
			$noeud[$cadran] = array('points' => array(),'nbrePoints' => 0, 'latMoyenne' => 0, 'lngMoyenne' => 0);
1585 jpm 253 
		}
1032 aurelien 254 
		$noeud[$cadran]['points'][] = $point;
255 
		$noeud[$cadran]['nbrePoints']++;
256 
		$noeud[$cadran]['latMoyenne'] += $point['lat'];
257 
		$noeud[$cadran]['lngMoyenne'] += $point['lng'];
978 jpm 258 
	}
1585 jpm 259 
 
979 jpm 260 
	private static function ajouterGroupeOuPoint(&$noeud) {
977 jpm 261 
		$groupe = array();
1142 aurelien 262 
		if ($noeud['nbrePoints'] > 1 && isset($noeud['latMoyenne']) && isset($noeud['lngMoyenne'])) {
977 jpm 263 
			$groupe['lat'] = $noeud['latMoyenne']/$noeud['nbrePoints'];
264 
			$groupe['lng'] = $noeud['lngMoyenne']/$noeud['nbrePoints'];
978 jpm 265 
			$groupe['id'] = 'GROUPE:'.$groupe['lat'].';'.$groupe['lng'];
977 jpm 266 
			$groupe['nbreMarqueur'] = $noeud['nbrePoints'];
267 
		} else {
268 
			$groupe = $noeud['points'][0];
269 
		}
270 
		return $groupe;
271 
	}
1585 jpm 272 
 
979 jpm 273 
	private static function estUnParentFeuilles(&$noeud) {
1585 jpm 274 
		return  self::estUneFeuille($noeud['A']) &&
275 
				self::estUneFeuille($noeud['B']) &&
276 
				self::estUneFeuille($noeud['C']) &&
978 jpm 277 
				self::estUneFeuille($noeud['D']);
278 
	}
1585 jpm 279 
 
280 
	private static function estUneFeuille(&$noeud) {
281 
		return $noeud == null ||
282 
		(!isset($noeud['A']) || $noeud['A'] == null) &&
283 
		(!isset($noeud['B']) || $noeud['B'] == null) &&
284 
		(!isset($noeud['C']) || $noeud['C'] == null) &&
1032 aurelien 285 
		(!isset($noeud['D']) || $noeud['D'] == null);
977 jpm 286 
	}
2460 jpm 287 
}