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Diffstat (limited to 'lib/location.php')
| -rw-r--r-- | lib/location.php | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/lib/location.php b/lib/location.php new file mode 100644 index 000000000..191550d6d --- /dev/null +++ b/lib/location.php @@ -0,0 +1,212 @@ +<?php +/** + * StatusNet, the distributed open-source microblogging tool + * + * Class for locations + * + * PHP version 5 + * + * LICENCE: This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * @category Location + * @package StatusNet + * @author Evan Prodromou <evan@status.net> + * @copyright 2009 StatusNet, Inc. + * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 + * @link http://status.net/ + */ + +if (!defined('STATUSNET') && !defined('LACONICA')) { + exit(1); +} + +/** + * class for locations + * + * These are stored in the DB as part of notice and profile records, + * but since they're about the same in both, we have a separate class + * for them. + * + * @category Location + * @package StatusNet + * @author Evan Prodromou <evan@status.net> + * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 + * @link http://status.net/ + */ + +class Location +{ + public $lat; + public $lon; + public $location_id; + public $location_ns; + private $_url; + private $_rdfurl; + + var $names = array(); + + /** + * Constructor that makes a Location from a string name + * + * @param string $name Human-readable name (any kind) + * @param string $language Language, default = common_language() + * + * @return Location Location with that name (or null if not found) + */ + + static function fromName($name, $language=null) + { + if (is_null($language)) { + $language = common_language(); + } + + $location = null; + + // Let a third-party handle it + + Event::handle('LocationFromName', array($name, $language, &$location)); + + return $location; + } + + /** + * Constructor that makes a Location from an ID + * + * @param integer $id Identifier ID + * @param integer $ns Namespace of the identifier + * @param string $language Language to return name in (default is common) + * + * @return Location The location with this ID (or null if none) + */ + + static function fromId($id, $ns, $language=null) + { + if (is_null($language)) { + $language = common_language(); + } + + $location = null; + + // Let a third-party handle it + + Event::handle('LocationFromId', array($id, $ns, $language, &$location)); + + return $location; + } + + /** + * Constructor that finds the nearest location to a lat/lon pair + * + * @param float $lat Latitude + * @param float $lon Longitude + * @param string $language Language for results, default = current + * + * @return Location the location found, or null if none found + */ + + static function fromLatLon($lat, $lon, $language=null) + { + if (is_null($language)) { + $language = common_language(); + } + + $location = null; + + // Let a third-party handle it + + if (Event::handle('LocationFromLatLon', + array($lat, $lon, $language, &$location))) { + // Default is just the lat/lon pair + + $location = new Location(); + + $location->lat = $lat; + $location->lon = $lon; + } + + return $location; + } + + /** + * Get the name for this location in the given language + * + * @param string $language language to use, default = current + * + * @return string location name or null if not found + */ + + function getName($language=null) + { + if (is_null($language)) { + $language = common_language(); + } + + if (array_key_exists($language, $this->names)) { + return $this->names[$language]; + } else { + $name = null; + Event::handle('LocationNameLanguage', array($this, $language, &$name)); + if (!empty($name)) { + $this->names[$language] = $name; + return $name; + } + } + } + + /** + * Get an URL suitable for this location + * + * @return string URL for this location or NULL + */ + + function getURL() + { + // Keep one cached + + if (is_string($this->_url)) { + return $this->_url; + } + + $url = null; + + Event::handle('LocationUrl', array($this, &$url)); + + $this->_url = $url; + + return $url; + } + + /** + * Get an URL for this location, suitable for embedding in RDF + * + * @return string URL for this location or NULL + */ + + function getRdfURL() + { + // Keep one cached + + if (is_string($this->_rdfurl)) { + return $this->_rdfurl; + } + + $url = null; + + Event::handle('LocationRdfUrl', array($this, &$url)); + + $this->_rdfurl = $url; + + return $url; + } +} |