| 1 | <?php |
| 2 | /*************************************************************************** |
| 3 | * Copyright (C) 2003-2010 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 | // 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; |
| 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; |
| 38 | |
| 39 | public function getGeocodedAddress(Address &$address) { |
| 40 | $this->prepareAddress($address); |
| 41 | $textAddress = $this->getTextToGeocode($address->text); |
| 42 | |
| 43 | // Try to geocode the full address. |
| 44 | if (($geocodedData = $this->getPlacemarkForAddress($textAddress))) { |
| 45 | $this->getUpdatedAddress($address, $geocodedData, null); |
| 46 | return; |
| 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))) { |
| 59 | $this->getUpdatedAddress($address, $geocodedData, $extraLines); |
| 60 | return; |
| 61 | } |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | public function stripGeocodingFromAddress(Address &$address) { |
| 66 | $address->geocodedText = null; |
| 67 | $address->geocodedPostalText = null; |
| 68 | $address->geoloc_choice = null; |
| 69 | $address->countryId = null; |
| 70 | $address->country = null; |
| 71 | $address->administrativeAreaName = null; |
| 72 | $address->subAdministrativeAreaName = null; |
| 73 | $address->localityName = null; |
| 74 | $address->thoroughfareName = null; |
| 75 | $address->postalCode = null; |
| 76 | $address->accuracy = 0; |
| 77 | } |
| 78 | |
| 79 | // Updates the address with the geocoded information from Google Maps. Also |
| 80 | // cleans up the final informations. |
| 81 | private function getUpdatedAddress(Address &$address, array $geocodedData, $extraLines) { |
| 82 | $this->fillAddressWithGeocoding($address, $geocodedData); |
| 83 | $this->formatAddress($address, $extraLines); |
| 84 | } |
| 85 | |
| 86 | // Retrieves the Placemark object (see #getPlacemarkFromJson()) for the @p |
| 87 | // address, by querying the Google Maps API. Returns the array on success, |
| 88 | // and null otherwise. |
| 89 | private function getPlacemarkForAddress($address) { |
| 90 | $url = $this->getGeocodingUrl($address); |
| 91 | $geoData = $this->getGeoJsonFromUrl($url); |
| 92 | |
| 93 | return ($geoData ? $this->getPlacemarkFromJson($geoData) : null); |
| 94 | } |
| 95 | |
| 96 | // Prepares address to be geocoded |
| 97 | private function prepareAddress(Address &$address) { |
| 98 | $address->text = preg_replace('/\s*\n\s*/m', "\n", trim($address->text)); |
| 99 | $address->postalText = $this->getPostalAddress($address->text); |
| 100 | } |
| 101 | |
| 102 | // Builds the Google Maps geocoder url to fetch information about @p address. |
| 103 | // Returns the built url. |
| 104 | private function getGeocodingUrl($address) { |
| 105 | global $globals; |
| 106 | |
| 107 | $parameters = array( |
| 108 | 'key' => $globals->geocoder->gmaps_key, |
| 109 | 'sensor' => 'false', // The queried address wasn't obtained from a GPS sensor. |
| 110 | 'hl' => 'fr', // Output langage. |
| 111 | 'oe' => 'utf8', // Output encoding. |
| 112 | 'output' => 'json', // Output format. |
| 113 | 'gl' => 'fr', // Location preferences (addresses are in France by default). |
| 114 | 'q' => $address, // The queries address. |
| 115 | ); |
| 116 | |
| 117 | return $globals->geocoder->gmaps_url . '?' . http_build_query($parameters); |
| 118 | } |
| 119 | |
| 120 | // Fetches JSON-encoded data from a Google Maps API url, and decode them. |
| 121 | // Returns the json array on success, and null otherwise. |
| 122 | private function getGeoJsonFromUrl($url) { |
| 123 | global $globals; |
| 124 | |
| 125 | // Prepare a backtrace object to log errors. |
| 126 | $bt = null; |
| 127 | if ($globals->debug & DEBUG_BT) { |
| 128 | if (!isset(PlBacktrace::$bt['Geoloc'])) { |
| 129 | new PlBacktrace('Geoloc'); |
| 130 | } |
| 131 | $bt = &PlBacktrace::$bt['Geoloc']; |
| 132 | $bt->start($url); |
| 133 | } |
| 134 | |
| 135 | // Fetch the geocoding data. |
| 136 | $rawData = file_get_contents($url); |
| 137 | if (!$rawData) { |
| 138 | if ($bt) { |
| 139 | $bt->stop(0, 'Could not retrieve geocoded address from GoogleMaps.'); |
| 140 | } |
| 141 | return null; |
| 142 | } |
| 143 | |
| 144 | // Decode the JSON-encoded data, and check for their validity. |
| 145 | $data = json_decode($rawData, true); |
| 146 | if ($bt) { |
| 147 | $bt->stop(count($data), null, $data); |
| 148 | } |
| 149 | |
| 150 | return $data; |
| 151 | } |
| 152 | |
| 153 | // Extracts the most appropriate placemark from the JSON data fetched from |
| 154 | // Google Maps. Returns a Placemark array on success, and null otherwise. See |
| 155 | // http://code.google.com/apis/maps/documentation/services.html#Geocoding_Structured |
| 156 | // for details on the Placemark structure. |
| 157 | private function getPlacemarkFromJson(array $data) { |
| 158 | // Check for geocoding failures. |
| 159 | if (!isset($data['Status']['code']) || $data['Status']['code'] != 200) { |
| 160 | // TODO: handle non-200 codes in a better way, since the code might |
| 161 | // indicate a temporary error on Google's side. |
| 162 | return null; |
| 163 | } |
| 164 | |
| 165 | // Check that at least one placemark was found. |
| 166 | if (count($data['Placemark']) == 0) { |
| 167 | return null; |
| 168 | } |
| 169 | |
| 170 | // Extract the placemark with the best accuracy. This is not always the |
| 171 | // best result (since the same address may yield two different placemarks). |
| 172 | $result = $data['Placemark'][0]; |
| 173 | foreach ($data['Placemark'] as $place) { |
| 174 | if ($place['AddressDetails']['Accuracy'] > $result['AddressDetails']['Accuracy']) { |
| 175 | $result = $place; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | return $result; |
| 180 | } |
| 181 | |
| 182 | // Fills the address with the geocoded data |
| 183 | private function fillAddressWithGeocoding(Address &$address, $geocodedData) { |
| 184 | // The geocoded address three is |
| 185 | // Country -> AdministrativeArea -> SubAdministrativeArea -> Locality -> Thoroughfare |
| 186 | // with all the possible shortcuts |
| 187 | // The address is formatted as xAL, or eXtensible Address Language, an international |
| 188 | // standard for address formatting. |
| 189 | // xAL documentation: http://www.oasis-open.org/committees/ciq/ciq.html#6 |
| 190 | $address->geocodedText = str_replace(', ', "\n", $geocodedData['address']); |
| 191 | if (isset($geocodedData['AddressDetails']['Accuracy'])) { |
| 192 | $address->accuracy = $geocodedData['AddressDetails']['Accuracy']; |
| 193 | } |
| 194 | |
| 195 | $currentPosition = $geocodedData['AddressDetails']; |
| 196 | if (isset($currentPosition['Country'])) { |
| 197 | $currentPosition = $currentPosition['Country']; |
| 198 | $address->countryId = $currentPosition['CountryNameCode']; |
| 199 | $address->country = $currentPosition['CountryName']; |
| 200 | } |
| 201 | if (isset($currentPosition['AdministrativeArea'])) { |
| 202 | $currentPosition = $currentPosition['AdministrativeArea']; |
| 203 | $address->administrativeAreaName = $currentPosition['AdministrativeAreaName']; |
| 204 | } |
| 205 | if (isset($currentPosition['SubAdministrativeArea'])) { |
| 206 | $currentPosition = $currentPosition['SubAdministrativeArea']; |
| 207 | $address->subAdministrativeAreaName = $currentPosition['SubAdministrativeAreaName']; |
| 208 | } |
| 209 | if (isset($currentPosition['Locality'])) { |
| 210 | $currentPosition = $currentPosition['Locality']; |
| 211 | $address->localityName = $currentPosition['LocalityName']; |
| 212 | } |
| 213 | if (isset($currentPosition['Thoroughfare'])) { |
| 214 | $address->thoroughfareName = $currentPosition['Thoroughfare']['ThoroughfareName']; |
| 215 | } |
| 216 | if (isset($currentPosition['PostalCode'])) { |
| 217 | $address->postalCode = $currentPosition['PostalCode']['PostalCodeNumber']; |
| 218 | } |
| 219 | |
| 220 | // Gets coordinates. |
| 221 | if (isset($geocodedData['Point']['coordinates'][0])) { |
| 222 | $address->latitude = $geocodedData['Point']['coordinates'][0]; |
| 223 | } |
| 224 | if (isset($geocodedData['Point']['coordinates'][1])) { |
| 225 | $address->longitude = $geocodedData['Point']['coordinates'][1]; |
| 226 | } |
| 227 | if (isset($geocodedData['ExtendedData']['LatLonBox']['north'])) { |
| 228 | $address->north = $geocodedData['ExtendedData']['LatLonBox']['north']; |
| 229 | } |
| 230 | if (isset($geocodedData['ExtendedData']['LatLonBox']['south'])) { |
| 231 | $address->south = $geocodedData['ExtendedData']['LatLonBox']['south']; |
| 232 | } |
| 233 | if (isset($geocodedData['ExtendedData']['LatLonBox']['east'])) { |
| 234 | $address->east = $geocodedData['ExtendedData']['LatLonBox']['east']; |
| 235 | } |
| 236 | if (isset($geocodedData['ExtendedData']['LatLonBox']['west'])) { |
| 237 | $address->west = $geocodedData['ExtendedData']['LatLonBox']['west']; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | // Formats the text of the geocoded address using the unused data and |
| 242 | // compares it to the given address. If they are too different, the user |
| 243 | // will be asked to choose between them. |
| 244 | private function formatAddress(Address &$address, $extraLines) { |
| 245 | $same = true; |
| 246 | if ($extraLines) { |
| 247 | $address->geocodedText = $extraLines . "\n" . $address->geocodedText; |
| 248 | } |
| 249 | $address->geocodedPostalText = $this->getPostalAddress($address->geocodedText); |
| 250 | $geoloc = strtoupper(preg_replace(array("/[0-9,\"'#~:;_\- ]/", "/\r\n/"), |
| 251 | array('', "\n"), $address->geocodedText)); |
| 252 | $text = strtoupper(preg_replace(array("/[0-9,\"'#~:;_\- ]/", "/\r\n/"), |
| 253 | array('', "\n"), $address->text)); |
| 254 | $arrayGeoloc = explode("\n", $geoloc); |
| 255 | $arrayText = explode("\n", $text); |
| 256 | $countGeoloc = count($arrayGeoloc); |
| 257 | $countText = count($arrayText); |
| 258 | |
| 259 | $totalDistance = 0; |
| 260 | if (($countText > $countGeoloc) || ($countText < $countGeoloc - 1) |
| 261 | || (($countText == $countGeoloc - 1) |
| 262 | && ($arrayText[$countText - 1] == strtoupper($address->country)))) { |
| 263 | $same = false; |
| 264 | } else { |
| 265 | for ($i = 0; $i < $countGeoloc && $i < $countText; ++$i) { |
| 266 | $lineDistance = levenshtein($arrayText[$i], trim($arrayGeoloc[$i])); |
| 267 | $totalDistance += $lineDistance; |
| 268 | if ($lineDistance > self::MAX_LINE_DISTANCE || $totalDistance > self::MAX_TOTAL_DISTANCE) { |
| 269 | $same = false; |
| 270 | break; |
| 271 | } |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | if ($same) { |
| 276 | $address->geocodedText = null; |
| 277 | $address->geocodedPostalText = null; |
| 278 | } else { |
| 279 | $address->geocodedText = str_replace("\n", "\r\n", $address->geocodedText); |
| 280 | $address->geocodedPostalText = str_replace("\n", "\r\n", $address->geocodedPostalText); |
| 281 | } |
| 282 | $address->text = str_replace("\n", "\r\n", $address->text); |
| 283 | $address->postalText = str_replace("\n", "\r\n", $address->postalText); |
| 284 | } |
| 285 | |
| 286 | // Returns the address formated for postal use. |
| 287 | // The main rules are (cf AFNOR XPZ 10-011): |
| 288 | // -everything in upper case; |
| 289 | // -if there are more then than 38 characters in a line, split it; |
| 290 | // -if there are more then than 32 characters in the description of the "street", use abbreviations. |
| 291 | private function getPostalAddress($text) { |
| 292 | static $abbreviations = array( |
| 293 | 'IMPASSE' => 'IMP', |
| 294 | 'RUE' => 'R', |
| 295 | 'AVENUE' => 'AV', |
| 296 | 'BOULEVARD' => 'BVD', |
| 297 | 'ROUTE' => 'R', |
| 298 | 'STREET' => 'ST', |
| 299 | 'ROAD' => 'RD', |
| 300 | ); |
| 301 | |
| 302 | $text = strtoupper($text); |
| 303 | $arrayText = explode("\n", $text); |
| 304 | $postalText = ''; |
| 305 | |
| 306 | foreach ($arrayText as $i => $line) { |
| 307 | $postalText .= (($i == 0) ? '' : "\n"); |
| 308 | if (($length = strlen($line)) > 32) { |
| 309 | $words = explode(' ', $line); |
| 310 | $count = 0; |
| 311 | foreach ($words as $word) { |
| 312 | if (isset($abbreviations[$word])) { |
| 313 | $word = $abbreviations[$word]; |
| 314 | } |
| 315 | if ($count + ($wordLength = strlen($word)) <= 38) { |
| 316 | $postalText .= (($count == 0) ? '' : ' ') . $word; |
| 317 | $count += (($count == 0) ? 0 : 1) + $wordLength; |
| 318 | } else { |
| 319 | $postalText .= "\n" . $word; |
| 320 | $count = strlen($word); |
| 321 | } |
| 322 | } |
| 323 | } else { |
| 324 | $postalText .= $line; |
| 325 | } |
| 326 | } |
| 327 | return $postalText; |
| 328 | } |
| 329 | |
| 330 | // Trims the name of the real country if it contains an ISO 3166-1 non-country |
| 331 | // item. For that purpose, we compare the last but one line of the address with |
| 332 | // all non-country items of ISO 3166-1. |
| 333 | private function getTextToGeocode($text) |
| 334 | { |
| 335 | $res = XDB::iterator('SELECT country, countryFR |
| 336 | FROM geoloc_countries |
| 337 | WHERE belongsTo IS NOT NULL'); |
| 338 | $countries = array(); |
| 339 | foreach ($res as $item) { |
| 340 | $countries[] = $item[0]; |
| 341 | $countries[] = $item[1]; |
| 342 | } |
| 343 | $textLines = explode("\n", $text); |
| 344 | $countLines = count($textLines); |
| 345 | $needle = strtoupper(trim($textLines[$countLines - 2])); |
| 346 | $isPseudoCountry = false; |
| 347 | foreach ($countries as $country) { |
| 348 | if (strtoupper($country) == $needle) { |
| 349 | $isPseudoCountry = true; |
| 350 | break; |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | if ($isPseudoCountry) { |
| 355 | return implode("\n", array_slice($textLines, 0, -1)); |
| 356 | } |
| 357 | return $text; |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: |
| 362 | ?> |