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1 | <?php |
2 | /*************************************************************************** | |
d4c08d89 | 3 | * Copyright (C) 2003-2010 Polytechnique.org * |
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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 | ||
4c906759 SJ |
22 | // Implementation of a Geocoder using the Google Maps API. Please refer to |
23 | // the following links for details: | |
24 | // http://code.google.com/apis/maps/documentation/services.html#Geocoding | |
25 | // http://code.google.com/intl/en/apis/maps/documentation/geocoding/ | |
26 | // http://code.google.com/apis/maps/documentation/reference.html#GGeoAddressAccuracy | |
27 | // | |
28 | // It requires the properties gmaps_key and gmaps_url to be defined in section | |
29 | // Geocoder in plat/al's configuration (platal.ini & platal.conf). | |
30 | class GMapsGeocoder extends Geocoder { | |
31 | ||
32 | // Maximum number of Geocoding calls to the Google Maps API. | |
33 | const MAX_GMAPS_RPC_CALLS = 5; | |
7bc2c396 SJ |
34 | // Maximum levenshtein distance authorized between input and geocoded text in a single line. |
35 | const MAX_LINE_DISTANCE = 5; | |
36 | // Maximum levenshtein distance authorized between input and geocoded text in the whole text. | |
37 | const MAX_TOTAL_DISTANCE = 6; | |
4c906759 | 38 | |
4e7a3faa SJ |
39 | public function getGeocodedAddress(Address &$address) { |
40 | $this->prepareAddress($address); | |
41 | $textAddress = $this->getTextToGeocode($address->text); | |
4c906759 SJ |
42 | |
43 | // Try to geocode the full address. | |
44 | if (($geocodedData = $this->getPlacemarkForAddress($textAddress))) { | |
4e7a3faa SJ |
45 | $this->getUpdatedAddress($address, $geocodedData, null); |
46 | return; | |
4c906759 SJ |
47 | } |
48 | ||
49 | // If the full geocoding failed, try to geocode only the final part of the address. | |
50 | // We start by geocoding everything but the first line, and continue until we get | |
51 | // a result. To respect the limit of GMaps calls, we ignore the first few lines | |
52 | // if there are too many address lines. | |
53 | $addressLines = explode("\n", $textAddress); | |
54 | $linesCount = count($addressLines); | |
55 | for ($i = max(1, $linesCount - self::MAX_GMAPS_RPC_CALLS + 1); $i < $linesCount; ++$i) { | |
56 | $extraLines = implode("\n", array_slice($addressLines, 0, $i)); | |
57 | $toGeocode = implode("\n", array_slice($addressLines, $i)); | |
58 | if (($geocodedData = $this->getPlacemarkForAddress($toGeocode))) { | |
4e7a3faa SJ |
59 | $this->getUpdatedAddress($address, $geocodedData, $extraLines); |
60 | return; | |
4c906759 SJ |
61 | } |
62 | } | |
4c906759 SJ |
63 | } |
64 | ||
4e7a3faa SJ |
65 | public function stripGeocodingFromAddress(Address &$address) { |
66 | $address->geocodedText = null; | |
4e7a3faa SJ |
67 | $address->geoloc_choice = null; |
68 | $address->countryId = null; | |
69 | $address->country = null; | |
70 | $address->administrativeAreaName = null; | |
71 | $address->subAdministrativeAreaName = null; | |
72 | $address->localityName = null; | |
73 | $address->thoroughfareName = null; | |
74 | $address->postalCode = null; | |
75 | $address->accuracy = 0; | |
73f6c165 | 76 | } |
00e5200b | 77 | |
4c906759 SJ |
78 | // Updates the address with the geocoded information from Google Maps. Also |
79 | // cleans up the final informations. | |
4e7a3faa SJ |
80 | private function getUpdatedAddress(Address &$address, array $geocodedData, $extraLines) { |
81 | $this->fillAddressWithGeocoding($address, $geocodedData); | |
4c906759 | 82 | $this->formatAddress($address, $extraLines); |
4c906759 SJ |
83 | } |
84 | ||
85 | // Retrieves the Placemark object (see #getPlacemarkFromJson()) for the @p | |
86 | // address, by querying the Google Maps API. Returns the array on success, | |
87 | // and null otherwise. | |
88 | private function getPlacemarkForAddress($address) { | |
89 | $url = $this->getGeocodingUrl($address); | |
90 | $geoData = $this->getGeoJsonFromUrl($url); | |
91 | ||
92 | return ($geoData ? $this->getPlacemarkFromJson($geoData) : null); | |
93 | } | |
94 | ||
95 | // Prepares address to be geocoded | |
4e7a3faa SJ |
96 | private function prepareAddress(Address &$address) { |
97 | $address->text = preg_replace('/\s*\n\s*/m', "\n", trim($address->text)); | |
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98 | } |
99 | ||
100 | // Builds the Google Maps geocoder url to fetch information about @p address. | |
101 | // Returns the built url. | |
102 | private function getGeocodingUrl($address) { | |
103 | global $globals; | |
104 | ||
105 | $parameters = array( | |
106 | 'key' => $globals->geocoder->gmaps_key, | |
107 | 'sensor' => 'false', // The queried address wasn't obtained from a GPS sensor. | |
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108 | 'oe' => 'utf8', // Output encoding. |
109 | 'output' => 'json', // Output format. | |
110 | 'gl' => 'fr', // Location preferences (addresses are in France by default). | |
111 | 'q' => $address, // The queries address. | |
112 | ); | |
113 | ||
114 | return $globals->geocoder->gmaps_url . '?' . http_build_query($parameters); | |
115 | } | |
116 | ||
117 | // Fetches JSON-encoded data from a Google Maps API url, and decode them. | |
118 | // Returns the json array on success, and null otherwise. | |
119 | private function getGeoJsonFromUrl($url) { | |
120 | global $globals; | |
121 | ||
122 | // Prepare a backtrace object to log errors. | |
123 | $bt = null; | |
124 | if ($globals->debug & DEBUG_BT) { | |
125 | if (!isset(PlBacktrace::$bt['Geoloc'])) { | |
126 | new PlBacktrace('Geoloc'); | |
127 | } | |
128 | $bt = &PlBacktrace::$bt['Geoloc']; | |
129 | $bt->start($url); | |
130 | } | |
131 | ||
132 | // Fetch the geocoding data. | |
133 | $rawData = file_get_contents($url); | |
134 | if (!$rawData) { | |
135 | if ($bt) { | |
4e7a3faa | 136 | $bt->stop(0, 'Could not retrieve geocoded address from GoogleMaps.'); |
4c906759 SJ |
137 | } |
138 | return null; | |
139 | } | |
140 | ||
141 | // Decode the JSON-encoded data, and check for their validity. | |
142 | $data = json_decode($rawData, true); | |
143 | if ($bt) { | |
144 | $bt->stop(count($data), null, $data); | |
145 | } | |
146 | ||
147 | return $data; | |
148 | } | |
149 | ||
150 | // Extracts the most appropriate placemark from the JSON data fetched from | |
151 | // Google Maps. Returns a Placemark array on success, and null otherwise. See | |
152 | // http://code.google.com/apis/maps/documentation/services.html#Geocoding_Structured | |
153 | // for details on the Placemark structure. | |
154 | private function getPlacemarkFromJson(array $data) { | |
155 | // Check for geocoding failures. | |
156 | if (!isset($data['Status']['code']) || $data['Status']['code'] != 200) { | |
157 | // TODO: handle non-200 codes in a better way, since the code might | |
158 | // indicate a temporary error on Google's side. | |
159 | return null; | |
160 | } | |
161 | ||
162 | // Check that at least one placemark was found. | |
163 | if (count($data['Placemark']) == 0) { | |
164 | return null; | |
165 | } | |
166 | ||
167 | // Extract the placemark with the best accuracy. This is not always the | |
168 | // best result (since the same address may yield two different placemarks). | |
169 | $result = $data['Placemark'][0]; | |
170 | foreach ($data['Placemark'] as $place) { | |
171 | if ($place['AddressDetails']['Accuracy'] > $result['AddressDetails']['Accuracy']) { | |
172 | $result = $place; | |
173 | } | |
174 | } | |
175 | ||
176 | return $result; | |
177 | } | |
178 | ||
179 | // Fills the address with the geocoded data | |
4e7a3faa | 180 | private function fillAddressWithGeocoding(Address &$address, $geocodedData) { |
4c906759 SJ |
181 | // The geocoded address three is |
182 | // Country -> AdministrativeArea -> SubAdministrativeArea -> Locality -> Thoroughfare | |
183 | // with all the possible shortcuts | |
184 | // The address is formatted as xAL, or eXtensible Address Language, an international | |
185 | // standard for address formatting. | |
186 | // xAL documentation: http://www.oasis-open.org/committees/ciq/ciq.html#6 | |
4e7a3faa | 187 | $address->geocodedText = str_replace(', ', "\n", $geocodedData['address']); |
4c906759 | 188 | if (isset($geocodedData['AddressDetails']['Accuracy'])) { |
4e7a3faa | 189 | $address->accuracy = $geocodedData['AddressDetails']['Accuracy']; |
4c906759 SJ |
190 | } |
191 | ||
192 | $currentPosition = $geocodedData['AddressDetails']; | |
193 | if (isset($currentPosition['Country'])) { | |
4e7a3faa SJ |
194 | $currentPosition = $currentPosition['Country']; |
195 | $address->countryId = $currentPosition['CountryNameCode']; | |
196 | $address->country = $currentPosition['CountryName']; | |
4c906759 SJ |
197 | } |
198 | if (isset($currentPosition['AdministrativeArea'])) { | |
4e7a3faa SJ |
199 | $currentPosition = $currentPosition['AdministrativeArea']; |
200 | $address->administrativeAreaName = $currentPosition['AdministrativeAreaName']; | |
4c906759 SJ |
201 | } |
202 | if (isset($currentPosition['SubAdministrativeArea'])) { | |
4e7a3faa SJ |
203 | $currentPosition = $currentPosition['SubAdministrativeArea']; |
204 | $address->subAdministrativeAreaName = $currentPosition['SubAdministrativeAreaName']; | |
4c906759 SJ |
205 | } |
206 | if (isset($currentPosition['Locality'])) { | |
4e7a3faa SJ |
207 | $currentPosition = $currentPosition['Locality']; |
208 | $address->localityName = $currentPosition['LocalityName']; | |
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209 | } |
210 | if (isset($currentPosition['Thoroughfare'])) { | |
4e7a3faa | 211 | $address->thoroughfareName = $currentPosition['Thoroughfare']['ThoroughfareName']; |
4c906759 SJ |
212 | } |
213 | if (isset($currentPosition['PostalCode'])) { | |
4e7a3faa | 214 | $address->postalCode = $currentPosition['PostalCode']['PostalCodeNumber']; |
4c906759 SJ |
215 | } |
216 | ||
217 | // Gets coordinates. | |
218 | if (isset($geocodedData['Point']['coordinates'][0])) { | |
4e7a3faa | 219 | $address->latitude = $geocodedData['Point']['coordinates'][0]; |
4c906759 SJ |
220 | } |
221 | if (isset($geocodedData['Point']['coordinates'][1])) { | |
4e7a3faa | 222 | $address->longitude = $geocodedData['Point']['coordinates'][1]; |
4c906759 SJ |
223 | } |
224 | if (isset($geocodedData['ExtendedData']['LatLonBox']['north'])) { | |
4e7a3faa | 225 | $address->north = $geocodedData['ExtendedData']['LatLonBox']['north']; |
4c906759 SJ |
226 | } |
227 | if (isset($geocodedData['ExtendedData']['LatLonBox']['south'])) { | |
4e7a3faa | 228 | $address->south = $geocodedData['ExtendedData']['LatLonBox']['south']; |
4c906759 SJ |
229 | } |
230 | if (isset($geocodedData['ExtendedData']['LatLonBox']['east'])) { | |
4e7a3faa | 231 | $address->east = $geocodedData['ExtendedData']['LatLonBox']['east']; |
4c906759 SJ |
232 | } |
233 | if (isset($geocodedData['ExtendedData']['LatLonBox']['west'])) { | |
4e7a3faa | 234 | $address->west = $geocodedData['ExtendedData']['LatLonBox']['west']; |
4c906759 SJ |
235 | } |
236 | } | |
237 | ||
238 | // Formats the text of the geocoded address using the unused data and | |
239 | // compares it to the given address. If they are too different, the user | |
240 | // will be asked to choose between them. | |
4e7a3faa | 241 | private function formatAddress(Address &$address, $extraLines) { |
4c906759 SJ |
242 | $same = true; |
243 | if ($extraLines) { | |
4e7a3faa | 244 | $address->geocodedText = $extraLines . "\n" . $address->geocodedText; |
4c906759 SJ |
245 | } |
246 | $geoloc = strtoupper(preg_replace(array("/[0-9,\"'#~:;_\- ]/", "/\r\n/"), | |
4e7a3faa | 247 | array('', "\n"), $address->geocodedText)); |
4c906759 | 248 | $text = strtoupper(preg_replace(array("/[0-9,\"'#~:;_\- ]/", "/\r\n/"), |
4e7a3faa | 249 | array('', "\n"), $address->text)); |
4c906759 SJ |
250 | $arrayGeoloc = explode("\n", $geoloc); |
251 | $arrayText = explode("\n", $text); | |
252 | $countGeoloc = count($arrayGeoloc); | |
253 | $countText = count($arrayText); | |
254 | ||
7bc2c396 | 255 | $totalDistance = 0; |
4c906759 SJ |
256 | if (($countText > $countGeoloc) || ($countText < $countGeoloc - 1) |
257 | || (($countText == $countGeoloc - 1) | |
4e7a3faa | 258 | && ($arrayText[$countText - 1] == strtoupper($address->country)))) { |
4c906759 SJ |
259 | $same = false; |
260 | } else { | |
261 | for ($i = 0; $i < $countGeoloc && $i < $countText; ++$i) { | |
7bc2c396 SJ |
262 | $lineDistance = levenshtein($arrayText[$i], trim($arrayGeoloc[$i])); |
263 | $totalDistance += $lineDistance; | |
264 | if ($lineDistance > self::MAX_LINE_DISTANCE || $totalDistance > self::MAX_TOTAL_DISTANCE) { | |
4c906759 | 265 | $same = false; |
7bc2c396 | 266 | break; |
4c906759 SJ |
267 | } |
268 | } | |
269 | } | |
7bc2c396 | 270 | |
4c906759 | 271 | if ($same) { |
4e7a3faa | 272 | $address->geocodedText = null; |
eecbf7f5 | 273 | } else { |
4e7a3faa | 274 | $address->geocodedText = str_replace("\n", "\r\n", $address->geocodedText); |
4c906759 | 275 | } |
4e7a3faa | 276 | $address->text = str_replace("\n", "\r\n", $address->text); |
5a10ab14 SJ |
277 | } |
278 | ||
00e5200b SJ |
279 | // Trims the name of the real country if it contains an ISO 3166-1 non-country |
280 | // item. For that purpose, we compare the last but one line of the address with | |
281 | // all non-country items of ISO 3166-1. | |
4e7a3faa | 282 | private function getTextToGeocode($text) |
00e5200b SJ |
283 | { |
284 | $res = XDB::iterator('SELECT country, countryFR | |
285 | FROM geoloc_countries | |
286 | WHERE belongsTo IS NOT NULL'); | |
287 | $countries = array(); | |
288 | foreach ($res as $item) { | |
289 | $countries[] = $item[0]; | |
290 | $countries[] = $item[1]; | |
291 | } | |
4e7a3faa | 292 | $textLines = explode("\n", $text); |
00e5200b SJ |
293 | $countLines = count($textLines); |
294 | $needle = strtoupper(trim($textLines[$countLines - 2])); | |
295 | $isPseudoCountry = false; | |
296 | foreach ($countries as $country) { | |
297 | if (strtoupper($country) == $needle) { | |
298 | $isPseudoCountry = true; | |
299 | break; | |
300 | } | |
301 | } | |
302 | ||
303 | if ($isPseudoCountry) { | |
02c4b93a | 304 | return implode("\n", array_slice($textLines, 0, -1)); |
00e5200b | 305 | } |
4e7a3faa | 306 | return $text; |
00e5200b | 307 | } |
4c906759 SJ |
308 | } |
309 | ||
310 | // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: | |
311 | ?> |