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<?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;
}
}
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