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4c906759 SJ |
1 | <?php |
2 | /*************************************************************************** | |
3 | * Copyright (C) 2003-2009 Polytechnique.org * | |
4 | * http://opensource.polytechnique.org/ * | |
5 | * * | |
6 | * This program is free software; you can redistribute it and/or modify * | |
7 | * it under the terms of the GNU General Public License as published by * | |
8 | * the Free Software Foundation; either version 2 of the License, or * | |
9 | * (at your option) any later version. * | |
10 | * * | |
11 | * This program is distributed in the hope that it will be useful, * | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
14 | * GNU General Public License for more details. * | |
15 | * * | |
16 | * You should have received a copy of the GNU General Public License * | |
17 | * along with this program; if not, write to the Free Software * | |
18 | * Foundation, Inc., * | |
19 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * | |
20 | ***************************************************************************/ | |
21 | ||
22 | // Interface for an address geocoder. It provides support for transforming a free | |
23 | // form address into a fully structured one. | |
24 | // TODO: define and use an Address object instead of a key-value map. | |
25 | abstract class Geocoder { | |
26 | // Geocodes @p the address, and returns the corresponding updated address. | |
27 | // Unknown key-value pairs available in the input map are retained as-is. | |
28 | abstract public function getGeocodedAddress(array $address); | |
29 | ||
30 | // Updates geoloc_administrativeareas, geoloc_subadministrativeareas and | |
31 | // geoloc_localities databases with new geocoded data and returns the | |
32 | // corresponding id. | |
33 | static public function getAreaId(array &$address, $area) | |
34 | { | |
35 | static $databases = array( | |
36 | 'administrativeArea' => 'geoloc_administrativeareas', | |
37 | 'subAdministrativeArea' => 'geoloc_subadministrativeareas', | |
38 | 'locality' => 'geoloc_localities', | |
39 | ); | |
40 | ||
41 | if (isset($address[$area . 'Name']) && isset($databases[$area])) { | |
42 | $res = XDB::query("SELECT id | |
43 | FROM " . $databases[$area] . " | |
44 | WHERE name = {?}", | |
45 | $address[$area . 'Name']); | |
46 | if ($res->numRows() == 0) { | |
47 | $address[$area . 'Id'] = XDB::execute("INSERT INTO " . $databases[$area] . " (name, country) | |
48 | VALUES ({?}, {?})", | |
49 | $address[$area . 'Name'], $address['countryId']); | |
50 | } else { | |
51 | $address[$area . 'Id'] = $res->fetchOneCell(); | |
52 | } | |
53 | } | |
54 | } | |
55 | } | |
56 | ||
57 | // Implementation of a Geocoder using the Google Maps API. Please refer to | |
58 | // the following links for details: | |
59 | // http://code.google.com/apis/maps/documentation/services.html#Geocoding | |
60 | // http://code.google.com/intl/en/apis/maps/documentation/geocoding/ | |
61 | // http://code.google.com/apis/maps/documentation/reference.html#GGeoAddressAccuracy | |
62 | // | |
63 | // It requires the properties gmaps_key and gmaps_url to be defined in section | |
64 | // Geocoder in plat/al's configuration (platal.ini & platal.conf). | |
65 | class GMapsGeocoder extends Geocoder { | |
66 | ||
67 | // Maximum number of Geocoding calls to the Google Maps API. | |
68 | const MAX_GMAPS_RPC_CALLS = 5; | |
69 | ||
70 | public function getGeocodedAddress(array $address) { | |
71 | $address = $this->prepareAddress($address); | |
72 | $textAddress = $address['text']; | |
73 | ||
74 | // Try to geocode the full address. | |
75 | if (($geocodedData = $this->getPlacemarkForAddress($textAddress))) { | |
76 | return $this->getUpdatedAddress($address, $geocodedData, null); | |
77 | } | |
78 | ||
79 | // If the full geocoding failed, try to geocode only the final part of the address. | |
80 | // We start by geocoding everything but the first line, and continue until we get | |
81 | // a result. To respect the limit of GMaps calls, we ignore the first few lines | |
82 | // if there are too many address lines. | |
83 | $addressLines = explode("\n", $textAddress); | |
84 | $linesCount = count($addressLines); | |
85 | for ($i = max(1, $linesCount - self::MAX_GMAPS_RPC_CALLS + 1); $i < $linesCount; ++$i) { | |
86 | $extraLines = implode("\n", array_slice($addressLines, 0, $i)); | |
87 | $toGeocode = implode("\n", array_slice($addressLines, $i)); | |
88 | if (($geocodedData = $this->getPlacemarkForAddress($toGeocode))) { | |
89 | return $this->getUpdatedAddress($address, $geocodedData, $extraLines); | |
90 | } | |
91 | } | |
92 | ||
93 | // No geocoding could be done, the initial address is returned as-is. | |
94 | return $address; | |
95 | } | |
96 | ||
97 | // Updates the address with the geocoded information from Google Maps. Also | |
98 | // cleans up the final informations. | |
99 | private function getUpdatedAddress(array $address, array $geocodedData, $extraLines) { | |
100 | $this->fillAddressWithGeocoding(&$address, $geocodedData); | |
101 | ||
102 | // If the accuracy is 6, it means only the street has been gecoded | |
103 | // but not the number, thus we need to fix it. | |
104 | if ($address['accuracy'] == 6) { | |
105 | $this->fixStreetNumber($address); | |
106 | } | |
107 | ||
108 | // We can now format the address. | |
109 | $this->formatAddress($address, $extraLines); | |
110 | ||
111 | // Some entities in ISO 3166 are not countries, thus they have to be replaced | |
112 | // by the country they belong to. | |
113 | // TODO: fixCountry($address); | |
114 | ||
115 | return $address; | |
116 | } | |
117 | ||
118 | // Retrieves the Placemark object (see #getPlacemarkFromJson()) for the @p | |
119 | // address, by querying the Google Maps API. Returns the array on success, | |
120 | // and null otherwise. | |
121 | private function getPlacemarkForAddress($address) { | |
122 | $url = $this->getGeocodingUrl($address); | |
123 | $geoData = $this->getGeoJsonFromUrl($url); | |
124 | ||
125 | return ($geoData ? $this->getPlacemarkFromJson($geoData) : null); | |
126 | } | |
127 | ||
128 | // Prepares address to be geocoded | |
129 | private function prepareAddress($address) { | |
130 | $address['text'] = preg_replace('/\s*\n\s*/m', "\n", trim($address['text'])); | |
131 | // TODO: $address['postalAddress'] = getPostalAddress($address['text']); | |
132 | $address['updateTime'] = time(); | |
133 | unset($address['changed']); | |
134 | return $address; | |
135 | } | |
136 | ||
137 | // Builds the Google Maps geocoder url to fetch information about @p address. | |
138 | // Returns the built url. | |
139 | private function getGeocodingUrl($address) { | |
140 | global $globals; | |
141 | ||
142 | $parameters = array( | |
143 | 'key' => $globals->geocoder->gmaps_key, | |
144 | 'sensor' => 'false', // The queried address wasn't obtained from a GPS sensor. | |
145 | 'hl' => 'fr', // Output langage. | |
146 | 'oe' => 'utf8', // Output encoding. | |
147 | 'output' => 'json', // Output format. | |
148 | 'gl' => 'fr', // Location preferences (addresses are in France by default). | |
149 | 'q' => $address, // The queries address. | |
150 | ); | |
151 | ||
152 | return $globals->geocoder->gmaps_url . '?' . http_build_query($parameters); | |
153 | } | |
154 | ||
155 | // Fetches JSON-encoded data from a Google Maps API url, and decode them. | |
156 | // Returns the json array on success, and null otherwise. | |
157 | private function getGeoJsonFromUrl($url) { | |
158 | global $globals; | |
159 | ||
160 | // Prepare a backtrace object to log errors. | |
161 | $bt = null; | |
162 | if ($globals->debug & DEBUG_BT) { | |
163 | if (!isset(PlBacktrace::$bt['Geoloc'])) { | |
164 | new PlBacktrace('Geoloc'); | |
165 | } | |
166 | $bt = &PlBacktrace::$bt['Geoloc']; | |
167 | $bt->start($url); | |
168 | } | |
169 | ||
170 | // Fetch the geocoding data. | |
171 | $rawData = file_get_contents($url); | |
172 | if (!$rawData) { | |
173 | if ($bt) { | |
174 | $bt->stop(0, "Could not retrieve geocoded address from GoogleMaps."); | |
175 | } | |
176 | return null; | |
177 | } | |
178 | ||
179 | // Decode the JSON-encoded data, and check for their validity. | |
180 | $data = json_decode($rawData, true); | |
181 | if ($bt) { | |
182 | $bt->stop(count($data), null, $data); | |
183 | } | |
184 | ||
185 | return $data; | |
186 | } | |
187 | ||
188 | // Extracts the most appropriate placemark from the JSON data fetched from | |
189 | // Google Maps. Returns a Placemark array on success, and null otherwise. See | |
190 | // http://code.google.com/apis/maps/documentation/services.html#Geocoding_Structured | |
191 | // for details on the Placemark structure. | |
192 | private function getPlacemarkFromJson(array $data) { | |
193 | // Check for geocoding failures. | |
194 | if (!isset($data['Status']['code']) || $data['Status']['code'] != 200) { | |
195 | // TODO: handle non-200 codes in a better way, since the code might | |
196 | // indicate a temporary error on Google's side. | |
197 | return null; | |
198 | } | |
199 | ||
200 | // Check that at least one placemark was found. | |
201 | if (count($data['Placemark']) == 0) { | |
202 | return null; | |
203 | } | |
204 | ||
205 | // Extract the placemark with the best accuracy. This is not always the | |
206 | // best result (since the same address may yield two different placemarks). | |
207 | $result = $data['Placemark'][0]; | |
208 | foreach ($data['Placemark'] as $place) { | |
209 | if ($place['AddressDetails']['Accuracy'] > $result['AddressDetails']['Accuracy']) { | |
210 | $result = $place; | |
211 | } | |
212 | } | |
213 | ||
214 | return $result; | |
215 | } | |
216 | ||
217 | // Fills the address with the geocoded data | |
218 | private function fillAddressWithGeocoding(&$address, $geocodedData) { | |
219 | // The geocoded address three is | |
220 | // Country -> AdministrativeArea -> SubAdministrativeArea -> Locality -> Thoroughfare | |
221 | // with all the possible shortcuts | |
222 | // The address is formatted as xAL, or eXtensible Address Language, an international | |
223 | // standard for address formatting. | |
224 | // xAL documentation: http://www.oasis-open.org/committees/ciq/ciq.html#6 | |
225 | $address['geoloc'] = str_replace(", ", "\n", $geocodedData['address']); | |
226 | if (isset($geocodedData['AddressDetails']['Accuracy'])) { | |
227 | $address['accuracy'] = $geocodedData['AddressDetails']['Accuracy']; | |
228 | } | |
229 | ||
230 | $currentPosition = $geocodedData['AddressDetails']; | |
231 | if (isset($currentPosition['Country'])) { | |
232 | $currentPosition = $currentPosition['Country']; | |
233 | $address['countryId'] = $currentPosition['CountryNameCode']; | |
234 | $address['country'] = $currentPosition['CountryName']; | |
235 | } | |
236 | if (isset($currentPosition['AdministrativeArea'])) { | |
237 | $currentPosition = $currentPosition['AdministrativeArea']; | |
238 | $address['administrativeAreaName'] = $currentPosition['AdministrativeAreaName']; | |
239 | } | |
240 | if (isset($currentPosition['SubAdministrativeArea'])) { | |
241 | $currentPosition = $currentPosition['SubAdministrativeArea']; | |
242 | $address['subAdministrativeAreaName'] = $currentPosition['SubAdministrativeAreaName']; | |
243 | } | |
244 | if (isset($currentPosition['Locality'])) { | |
245 | $currentPosition = $currentPosition['Locality']; | |
246 | $address['localityName'] = $currentPosition['LocalityName']; | |
247 | } | |
248 | if (isset($currentPosition['Thoroughfare'])) { | |
249 | $address['thoroughfareName'] = $currentPosition['Thoroughfare']['ThoroughfareName']; | |
250 | } | |
251 | if (isset($currentPosition['PostalCode'])) { | |
252 | $address['postalCode'] = $currentPosition['PostalCode']['PostalCodeNumber']; | |
253 | } | |
254 | ||
255 | // Gets coordinates. | |
256 | if (isset($geocodedData['Point']['coordinates'][0])) { | |
257 | $address['latitude'] = $geocodedData['Point']['coordinates'][0]; | |
258 | } | |
259 | if (isset($geocodedData['Point']['coordinates'][1])) { | |
260 | $address['longitude'] = $geocodedData['Point']['coordinates'][1]; | |
261 | } | |
262 | if (isset($geocodedData['ExtendedData']['LatLonBox']['north'])) { | |
263 | $address['north'] = $geocodedData['ExtendedData']['LatLonBox']['north']; | |
264 | } | |
265 | if (isset($geocodedData['ExtendedData']['LatLonBox']['south'])) { | |
266 | $address['south'] = $geocodedData['ExtendedData']['LatLonBox']['south']; | |
267 | } | |
268 | if (isset($geocodedData['ExtendedData']['LatLonBox']['east'])) { | |
269 | $address['east'] = $geocodedData['ExtendedData']['LatLonBox']['east']; | |
270 | } | |
271 | if (isset($geocodedData['ExtendedData']['LatLonBox']['west'])) { | |
272 | $address['west'] = $geocodedData['ExtendedData']['LatLonBox']['west']; | |
273 | } | |
274 | } | |
275 | ||
276 | // Formats the text of the geocoded address using the unused data and | |
277 | // compares it to the given address. If they are too different, the user | |
278 | // will be asked to choose between them. | |
279 | private function formatAddress(&$address, $extraLines) { | |
280 | $same = true; | |
281 | if ($extraLines) { | |
282 | $address['geoloc'] = $extraLines . "\n" . $address['geoloc']; | |
283 | } | |
284 | $geoloc = strtoupper(preg_replace(array("/[0-9,\"'#~:;_\- ]/", "/\r\n/"), | |
285 | array("", "\n"), $address['geoloc'])); | |
286 | $text = strtoupper(preg_replace(array("/[0-9,\"'#~:;_\- ]/", "/\r\n/"), | |
287 | array("", "\n"), $address['text'])); | |
288 | $arrayGeoloc = explode("\n", $geoloc); | |
289 | $arrayText = explode("\n", $text); | |
290 | $countGeoloc = count($arrayGeoloc); | |
291 | $countText = count($arrayText); | |
292 | ||
293 | if (($countText > $countGeoloc) || ($countText < $countGeoloc - 1) | |
294 | || (($countText == $countGeoloc - 1) | |
295 | && ($arrayText[$countText - 1] == strtoupper($address['country'])))) { | |
296 | $same = false; | |
297 | } else { | |
298 | for ($i = 0; $i < $countGeoloc && $i < $countText; ++$i) { | |
299 | if (levenshtein($arrayText[$i], trim($arrayGeoloc[$i])) > 3) { | |
300 | $same = false; | |
301 | } | |
302 | } | |
303 | } | |
304 | if ($same) { | |
305 | $address['text'] = $address['geoloc']; | |
306 | unset($address['geoloc']); | |
307 | } | |
308 | } | |
309 | ||
310 | // Search for the lign from the given address that is the closest to the geocoded thoroughfareName | |
311 | // and replaces the corresponding lign in the geocoded text by it. | |
312 | static protected function fixStreetNumber(&$address) | |
313 | { | |
314 | if (isset($address['thoroughfareName'])) { | |
315 | $thoroughfareName = $address['thoroughfareName']; | |
316 | $thoroughfareToken = strtoupper(trim(preg_replace(array("/[,\"'#~:;_\-]/", "/\r\n/"), | |
317 | array("", "\n"), $thoroughfareName))); | |
318 | $geolocLines = explode("\n", $address['geoloc']); | |
319 | $textLines = explode("\n", $address['text']); | |
320 | $mindist = strlen($thoroughfareToken); | |
321 | $minpos = 0; | |
322 | $pos = 0; | |
323 | foreach ($textLines as $i => $token) { | |
324 | if (($l = levenshtein(strtoupper(trim(preg_replace(array("/[,\"'#~:;_\-]/", "/\r\n/"), | |
325 | array("", "\n"), $token))), | |
326 | $thoroughfareToken)) < $mindist) { | |
327 | $mindist = $l; | |
328 | $minpos = $i; | |
329 | } | |
330 | } | |
331 | foreach ($geolocLines as $i => $line) { | |
332 | if (strtoupper(trim($thoroughfareName)) == strtoupper(trim($line))) { | |
333 | $pos = $i; | |
334 | break; | |
335 | } | |
336 | } | |
337 | $geolocLines[$pos] = $textLines[$minpos]; | |
338 | $address['geoloc'] = implode("\n", $geolocLines); | |
339 | } | |
340 | } | |
341 | } | |
342 | ||
343 | // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: | |
344 | ?> |