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1121 aurelien 1
<?php
2
class CartoGroupage {
3
 
1138 aurelien 4
	const MARQUEUR_GROUPE = 'GROUPE';
5
	const MARQUEUR_COMMUNE = 'COMMUNE';
6
	const MARQUEUR_STATION = 'STATION';
7
 
1121 aurelien 8
	private static $seuilClusterisation = 200;
9
	private static $zoomDefaut = 3;
10
	private static $zoomMaxClustering = 12;
11
	private static $pasZoomDefaut = 1;
12
	private static $pasZoomMaxClustering = 0.05;
13
	private static $profondeurMin = 0;
14
	private static $profondeurMax = 8;
15
 
16
	private static $pasCorrectionCentre = null;
17
	private static $coefficientReductionPas = null;
18
	private static $coefficientProfondeurMax = null;
19
 
1171 aurelien 20
	private static $nbElements = array('stations' => 0,'communes' => 0, 'points' => 0);
1138 aurelien 21
	private static $listeNoeudsSelectionnes = array();
1121 aurelien 22
	private static $bornesMax = array('latMin' => null, 'lngMin' => null, 'latMax' => null, 'lngMax' => null);
1138 aurelien 23
	private static $id_traites = array();
1121 aurelien 24
	/*
25
	  +---------+---------+
26
	  |         |         |
27
	  |    A    |    B    |
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	  |         |         |
29
	  +---------*---------+
30
	  |         |         |
31
	  |    D    |    C    |
32
	  |         |         |
33
	  +---------+---------+
34
 
35
	  Quatres cadrans sont considérés par le quad tree
36
	  * = centre de la fenetre
37
	 */
38
	public static function creerGroupesQuadtree(&$markers, $neLat, $neLng, $swLat, $swLng, $zoom = 3) {
39
		if(count($markers) > self::$seuilClusterisation) {
40
 
41
			self::calculerProfondeurMax($zoom);
42
			self::calculerPasCorrectionCentre($zoom);
43
 
44
			$noeudRacine = array('nbrePoints' => count($markers), 'points' => $markers);
45
			self::attribuerAuCadran($noeudRacine, $neLat, $neLng, $swLat, $swLng);
46
 
47
		} else {
1138 aurelien 48
			foreach($markers as &$marker) {
49
				if(!self::estUnPointAExclure($marker)) {
50
					$emplacement = self::formaterPointPourAjout(&$marker);
51
					self::mettreAJourBornes(&$marker);
52
					$points = array($marker);
53
					$noeudSimple = array('points' => $points, 'nbrePoints' => 1);
54
					self::$nbElements[$emplacement]++;
55
					self::$listeNoeudsSelectionnes[] = self::ajouterGroupeOuPoint($noeudSimple);
56
				}
1171 aurelien 57
				self::$nbElements['points']++;
1121 aurelien 58
			}
59
		}
60
		return self::$listeNoeudsSelectionnes;
61
	}
62
 
63
	private function calculerCoefficientReductionPas() {
64
		if(self::$coefficientReductionPas == null) {
65
			self::$coefficientReductionPas = (self::$pasZoomMaxClustering - self::$pasZoomDefaut)/(self::$zoomMaxClustering - self::$zoomDefaut);
66
		}
67
 
68
		return self::$coefficientReductionPas;
69
	}
70
 
71
	private function calculerPasCorrectionCentre($zoom) {
72
		self::$pasCorrectionCentre = ($zoom - self::$zoomDefaut) * self::calculerCoefficientReductionPas() + self::$pasZoomDefaut;
73
	}
74
 
75
	private function calculerCoefficientProfondeurMax() {
76
		if(self::$coefficientProfondeurMax == null) {
77
			self::$coefficientProfondeurMax = (self::$profondeurMax - self::$profondeurMin)/(self::$zoomMaxClustering - self::$zoomDefaut);
78
		}
79
 
80
		return self::$coefficientProfondeurMax;
81
	}
82
 
83
	private function calculerProfondeurMax($zoom) {
84
		if($zoom > self::$zoomDefaut) {
85
			self::$profondeurMax = round(($zoom - self::$zoomDefaut) * self::calculerCoefficientProfondeurMax() + self::$profondeurMin,0);
86
		} else {
87
			self::$profondeurMax = 1;
88
		}
89
	}
90
 
91
	public static function getNbElements() {
92
		return self::$nbElements;
93
	}
94
 
95
	public static function mettreAJourBornes(&$point) {
1139 aurelien 96
 
97
		if(!is_numeric($point['lat']) || abs($point['lat']) > 90) return;
98
		if(!is_numeric($point['lng']) || abs($point['lng']) > 180) return;
99
 
100
		self::$bornesMax['latMin'] = ($point['lat'] < self::$bornesMax['latMin'] || self::$bornesMax['latMin'] == null) ? $point['lat'] : self::$bornesMax['latMin'] ;
101
		self::$bornesMax['lngMin'] = ($point['lng'] < self::$bornesMax['lngMin'] || self::$bornesMax['lngMin'] == null) ? $point['lng'] : self::$bornesMax['lngMin'] ;
102
		self::$bornesMax['latMax'] = ($point['lat'] > self::$bornesMax['latMax'] || self::$bornesMax['latMax'] == null) ? $point['lat'] : self::$bornesMax['latMax'] ;
103
		self::$bornesMax['lngMax'] = ($point['lng'] > self::$bornesMax['lngMax'] || self::$bornesMax['lngMax'] == null) ? $point['lng'] : self::$bornesMax['lngMax'] ;
1121 aurelien 104
	}
105
 
106
	public static function getBornes() {
107
		return self::$bornesMax;
108
	}
109
 
110
	/**
111
	 *
112
	 * @param mixed $noeud Le noeud à traiter par le quadtree
113
	 * @param float $neLat Latitude du coin nord est de la fenetre
114
	 * @param float $neLng Longitude du coin nord est de la fenetre
115
	 * @param float $swLat Latitude du coin sud ouest de la fenetre
116
	 * @param float $swLng Longitude du coin sud ouest de la fenetre
117
	 * @param int $profondeur profondeur courante de l'arbre
118
	 */
119
	private static function attribuerAuCadran(&$noeud, $neLat, $neLng, $swLat, $swLng, $profondeur = 0) {
120
 
121
		$latCentre = round((($neLat+$swLat)/2)/self::$pasCorrectionCentre,0)*self::$pasCorrectionCentre;
122
		$lngCentre = round((($neLng+$swLng)/2)/self::$pasCorrectionCentre,0)*self::$pasCorrectionCentre;
123
 
1138 aurelien 124
		foreach ($noeud['points'] as &$point) {
125
			if(!self::estUnPointAExclure($point)) {
126
				$emplacement = self::formaterPointPourAjout(&$point);
1121 aurelien 127
				self::mettreAJourBornes(&$point);
128
				$cadran = self::obtenirCadranPourPoint($latCentre, $lngCentre, $point);
129
				self::ajouterFils($noeud,$cadran,$point);
1138 aurelien 130
				self::$nbElements[$emplacement]++;
131
			}
1171 aurelien 132
			self::$nbElements['points']++;
1121 aurelien 133
		}
134
 
135
		$profondeur++;
136
 
137
		if($profondeur <= self::$profondeurMax) {
138
			(isset($noeud['A']) && $noeud['A'] != null) ? self::attribuerAuCadran($noeud['A'], $neLat, $lngCentre , $latCentre, $swLng, $profondeur) : '';
139
			(isset($noeud['B']) && $noeud['B'] != null) ? self::attribuerAuCadran($noeud['B'], $neLat, $neLng, $latCentre, $lngCentre, $profondeur) : '';
140
			(isset($noeud['C']) && $noeud['C'] != null) ? self::attribuerAuCadran($noeud['C'], $latCentre, $neLng, $swLat, $lngCentre, $profondeur) : '';
141
			(isset($noeud['D']) && $noeud['D'] != null) ? self::attribuerAuCadran($noeud['D'], $latCentre, $lngCentre, $swLat, $swLng, $profondeur) : '';
142
		}
143
 
144
		if(self::estUnParentFeuilles($noeud)) {
145
			self::$listeNoeudsSelectionnes[] = self::ajouterGroupeOuPoint($noeud);
146
		}
147
	}
148
 
1138 aurelien 149
	private static function estUnPointAExclure(&$point) {
150
		return self::estSensible($point) &&
151
		self::coordonneesCommuneSontNulles($point);
152
	}
153
 
154
	private static function coordonneesCommuneSontNulles(&$point) {
155
		$coord_nulles = ($point['wgs84_latitude'] == null ||
156
		$point['wgs84_latitude'] == '' ||
157
		$point['wgs84_longitude'] == null ||
158
		$point['wgs84_longitude'] == '');
159
		return $coord_nulles;
160
	}
161
 
162
	private static function coordonneesSontNulles(&$point) {
163
 
164
		$coord_nulles = ($point['coord_x'] == '000null' ||
165
				$point['coord_x'] == '' ||
166
				$point['coord_y'] == '000null' ||
167
				$point['coord_y'] == '');
168
		return $coord_nulles;
169
	}
170
 
171
	private static function estSensible(&$point) {
172
		$sensible = isset($point['mots_cles_texte']) && substr_count($point['mots_cles_texte'], 'sensible') != 0;
173
		return $sensible;
174
	}
175
 
176
	private static function formaterNomStation(&$point) {
177
		$station = '';
178
		if($point['station'] != '' && $point['station'] != '000null') {
179
			$station = $point['station'];
180
		} else {
181
			$station = $point['location'].(($point['id_location'] != '' && $point['id_location'] != '000null') ? '('.$point['id_location'].')' : '');
1121 aurelien 182
		}
1138 aurelien 183
 
184
		return $station;
1121 aurelien 185
	}
186
 
1138 aurelien 187
	private static function formaterPointPourAjout(&$point) {
188
 
189
		if(isset($point['type_emplacement'])) {
190
			return $point['type_emplacement'];
191
		}
192
 
193
		if(self::coordonneesSontNulles($point) || self::estSensible($point)) {
1143 aurelien 194
			$point_allege = array();
195
			$point_allege['id'] = self::MARQUEUR_COMMUNE.':'.$point['wgs84_latitude'].'|'.$point['wgs84_longitude'];
196
			$point_allege['type_emplacement'] = 'communes';
197
			$point_allege['lat'] = (float)$point['wgs84_latitude'];
198
			$point_allege['lng'] = (float)$point['wgs84_longitude'];
199
 
200
			$point = $point_allege;
1138 aurelien 201
		} else {
202
			$point_allege = array();
203
			$point_allege['id'] = self::MARQUEUR_STATION.':'.$point['coord_x'].'|'.$point['coord_y'];
204
			$point_allege['type_emplacement'] = 'stations';
205
			$point_allege['nom'] = self::formaterNomStation($point);
206
			$point_allege['lat'] = (float)$point['coord_x'];
207
			$point_allege['lng'] = (float)$point['coord_y'];
208
 
209
			$point = $point_allege;
210
		}
211
 
212
		return $point['type_emplacement'];
213
	}
214
 
1121 aurelien 215
	private function obtenirCadranPourPoint($latCentre,$lngCentre, &$point) {
216
		if ($point['lng'] < $lngCentre) {
217
			if ($point['lat'] > $latCentre) {
218
					$cadran = 'A';
219
				} else {
220
					$cadran = 'D';
221
				}
222
		} else {
223
			if ($point['lat'] > $latCentre) {
224
				$cadran = 'B';
225
			} else {
226
				$cadran = 'C';
227
			}
228
		}
229
		return $cadran;
230
	}
231
 
232
	private static function ajouterFils(&$noeud, $cadran, &$point) {
233
		if(!isset($noeud[$cadran])) {
234
			$noeud[$cadran] = array('points' => array(),'nbrePoints' => 0, 'latMoyenne' => 0, 'lngMoyenne' => 0);
235
		}
236
		$noeud[$cadran]['points'][] = $point;
237
		$noeud[$cadran]['nbrePoints']++;
238
		$noeud[$cadran]['latMoyenne'] += $point['lat'];
239
		$noeud[$cadran]['lngMoyenne'] += $point['lng'];
240
	}
241
 
242
	private static function ajouterGroupeOuPoint(&$noeud) {
243
		$groupe = array();
1138 aurelien 244
		if ($noeud['nbrePoints'] > 1 && isset($noeud['latMoyenne']) && isset($noeud['lngMoyenne'])) {
1121 aurelien 245
			$groupe['lat'] = $noeud['latMoyenne']/$noeud['nbrePoints'];
246
			$groupe['lng'] = $noeud['lngMoyenne']/$noeud['nbrePoints'];
247
			$groupe['id'] = 'GROUPE:'.$groupe['lat'].';'.$groupe['lng'];
248
			$groupe['nbreMarqueur'] = $noeud['nbrePoints'];
249
		} else {
250
			$groupe = $noeud['points'][0];
251
		}
252
		return $groupe;
253
	}
254
 
1171 aurelien 255
 
1121 aurelien 256
	private static function estUnParentFeuilles(&$noeud) {
257
		return  self::estUneFeuille($noeud['A']) &&
258
				self::estUneFeuille($noeud['B']) &&
259
				self::estUneFeuille($noeud['C']) &&
260
				self::estUneFeuille($noeud['D']);
261
	}
262
 
263
	private static function estUneFeuille(&$noeud) {
264
		return $noeud == null ||
265
		(!isset($noeud['A']) || $noeud['A'] == null) &&
266
		(!isset($noeud['B']) || $noeud['B'] == null) &&
267
		(!isset($noeud['C']) || $noeud['C'] == null) &&
268
		(!isset($noeud['D']) || $noeud['D'] == null);
269
	}
270
}
271
?>