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<?php |
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namespace Maps; |
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use DataValues\Geo\Formatters\GeoCoordinateFormatter; |
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use DataValues\Geo\Parsers\GeoCoordinateParser; |
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use DataValues\Geo\Values\LatLongValue; |
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use MWException; |
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use ValueParsers\ParseException; |
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/** |
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* Class for geocoder functionality of the Maps extension. |
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* |
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* FIXME: this is procedural spaghetti |
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* |
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* @since 0.4 |
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* |
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* @licence GNU GPL v2+ |
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* @author Jeroen De Dauw < [email protected] > |
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*/ |
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final class Geocoders { |
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/** |
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* Associative with geoservice identifiers as keys containing instances of |
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* the geocoder classes. |
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* |
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* Note: This list only contains the instances, so is not to be used for |
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* looping over all available services, as not all of them are guaranteed |
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* to have an instance already, use $registeredServices for this purpouse. |
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* |
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* @since 0.7 |
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* |
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* @var Geocoder[] |
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*/ |
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protected static $geocoders = []; |
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/** |
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* Associative with geoservice identifiers as keys containing the class |
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* name of the geocoders. This is used for registration of a geocoder |
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* without immediately instantiating it. |
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* |
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* @since 0.7 |
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* |
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* @var array of string => string |
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*/ |
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public static $registeredGeocoders = []; |
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/** |
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* The global geocoder cache, holding geocoded data when enabled. |
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* |
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* @since 0.7 |
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* |
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* @var array |
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*/ |
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private static $globalGeocoderCache = []; |
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/** |
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* Can geocoding happen, ie are there any geocoders available. |
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* |
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* @since 1.0.3 |
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* @var boolean |
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*/ |
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protected static $canGeocode = false; |
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/** |
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* Returns if this class can do geocoding operations. |
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* Ie. if there are any geocoders available. |
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* |
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* @since 0.7 |
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* |
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* @return boolean |
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*/ |
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public static function canGeocode() { |
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self::init(); |
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return self::$canGeocode; |
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} |
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/** |
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* Gets a list of available geocoders. |
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* |
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* @since 1.0.3 |
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* |
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* @return array |
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*/ |
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public static function getAvailableGeocoders() { |
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self::init(); |
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return array_keys( self::$registeredGeocoders ); |
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} |
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/** |
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* Initiate the geocoding functionality. |
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* |
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* @since 1.0.3 |
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* |
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* @return boolean Indicates if init happened |
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*/ |
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public static function init() { |
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static $initiated = false; |
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if ( $initiated ) { |
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return false; |
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} |
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$initiated = true; |
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// Register the geocoders. |
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\Hooks::run( 'GeocoderFirstCallInit' ); |
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// Determine if there are any geocoders. |
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self::$canGeocode = count( self::$registeredGeocoders ) > 0; |
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return true; |
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} |
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/** |
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* This function first determines whether the provided string is a pair or coordinates |
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* or an address. If it's the later, an attempt to geocode will be made. The function will |
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* return the coordinates or false, in case a geocoding attempt was made but failed. |
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* |
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* @since 0.7 |
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* |
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* @param string $coordsOrAddress |
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* @param string $geoservice |
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* @param string|false $mappingService |
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* @param boolean $checkForCoords |
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* |
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* @return LatLongValue|false |
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*/ |
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public static function attemptToGeocode( $coordsOrAddress, $geoservice = '', $mappingService = false, $checkForCoords = true ) { |
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if ( $checkForCoords ) { |
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$coordinateParser = new GeoCoordinateParser( new \ValueParsers\ParserOptions() ); |
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try { |
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return $coordinateParser->parse( $coordsOrAddress ); |
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} |
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catch ( ParseException $parseException ) { |
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return self::geocode( $coordsOrAddress, $geoservice, $mappingService ); |
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} |
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} else { |
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return self::geocode( $coordsOrAddress, $geoservice, $mappingService ); |
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} |
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} |
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/** |
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* |
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* |
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* @since 0.7 |
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* |
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* @param string $coordsOrAddress |
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* @param string $geoService |
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* @param string|false $mappingService |
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* |
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* @return boolean |
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*/ |
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public static function isLocation( $coordsOrAddress, $geoService = '', $mappingService = false ) { |
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return self::attemptToGeocode( $coordsOrAddress, $geoService, $mappingService ) !== false; |
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} |
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/** |
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* Geocodes an address with the provided geocoding service and returns the result |
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* as a string with the optionally provided format, or false when the geocoding failed. |
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* |
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* @since 0.7 |
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* |
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* @param string $coordsOrAddress |
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* @param string $service |
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* @param string $mappingService |
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* @param boolean $checkForCoords |
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* @param string $targetFormat The notation to which they should be formatted. Defaults to floats. |
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* @param boolean $directional Indicates if the target notation should be directional. Defaults to false. |
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* |
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* @return string|false |
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*/ |
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public static function attemptToGeocodeToString( $coordsOrAddress, $service = '', $mappingService = false, $checkForCoords = true, $targetFormat = Maps_COORDS_FLOAT, $directional = false ) { |
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$geoCoordinate = self::attemptToGeocode( $coordsOrAddress, $service, $mappingService, $checkForCoords ); |
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if ( $geoCoordinate === false ) { |
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return false; |
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} |
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$options = new \ValueFormatters\FormatterOptions( [ |
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GeoCoordinateFormatter::OPT_FORMAT => $targetFormat, |
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GeoCoordinateFormatter::OPT_DIRECTIONAL => $directional, |
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GeoCoordinateFormatter::OPT_PRECISION => 1 / 360000 |
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] ); |
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$formatter = new GeoCoordinateFormatter( $options ); |
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return $formatter->format( $geoCoordinate ); |
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} |
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/** |
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* Geocodes an address with the provided geocoding service and returns the result |
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* as an array, or false when the geocoding failed. |
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* |
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* FIXME: complexity |
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* |
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* @since 0.7 |
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* |
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* @param string $address |
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* @param string $geoService |
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* @param string|false $mappingService |
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* |
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* @return LatLongValue|false |
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* @throws MWException |
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*/ |
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public static function geocode( $address, $geoService = '', $mappingService = false ) { |
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if ( !is_string( $address ) ) { |
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throw new MWException( 'Parameter $address must be a string at ' . __METHOD__ ); |
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} |
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if ( !self::canGeocode() ) { |
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return false; |
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} |
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$geocoder = self::getValidGeocoderInstance( $geoService ); |
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// This means there was no suitable geocoder found, so return false. |
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if ( $geocoder === false ) { |
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return false; |
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} |
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if ( $geocoder->hasGlobalCacheSupport() ) { |
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$cacheResult = self::cacheRead( $address ); |
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// This means the cache returned an already computed set of coordinates. |
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if ( $cacheResult !== false ) { |
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assert( $cacheResult instanceof LatLongValue ); |
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return $cacheResult; |
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} |
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} |
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$coordinates = self::getGeocoded( $geocoder, $address ); |
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if ( $coordinates === false ) { |
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return false; |
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} |
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self::cacheWrite( $address, $coordinates ); |
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return $coordinates; |
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} |
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private static function getGeocoded( Geocoder $geocoder, $address ) { |
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$coordinates = self::getGeocodedAsArray( $geocoder, $address ); |
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if ( $coordinates !== false ) { |
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$coordinates = new LatLongValue( |
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$coordinates['lat'], |
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$coordinates['lon'] |
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); |
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} |
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return $coordinates; |
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} |
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private static function getGeocodedAsArray( Geocoder $geocoder, $address ) { |
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// Do the actual geocoding via the geocoder. |
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$coordinates = $geocoder->geocode( $address ); |
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// If there address could not be geocoded, and contains comma's, try again without the comma's. |
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// This is cause several geocoding services such as geonames do not handle comma's well. |
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if ( !$coordinates && strpos( $address, ',' ) !== false ) { |
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$coordinates = $geocoder->geocode( str_replace( ',', '', $address ) ); |
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} |
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return $coordinates; |
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} |
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/** |
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* Returns already coordinates already known from previous geocoding operations, |
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* or false if there is no match found in the cache. |
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* |
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* @since 0.7 |
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* |
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* @param string $address |
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* |
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* @return LatLongValue|boolean false |
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*/ |
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protected static function cacheRead( $address ) { |
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global $egMapsEnableGeoCache; |
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if ( $egMapsEnableGeoCache && array_key_exists( $address, self::$globalGeocoderCache ) ) { |
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return self::$globalGeocoderCache[$address]; |
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} |
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else { |
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return false; |
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} |
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} |
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/** |
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* Writes the geocoded result to the cache if the cache is on. |
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* |
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* @since 0.7 |
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* |
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* @param string $address |
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* @param LatLongValue $coordinates |
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*/ |
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protected static function cacheWrite( $address, LatLongValue $coordinates ) { |
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global $egMapsEnableGeoCache; |
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// Add the obtained coordinates to the cache when there is a result and the cache is enabled. |
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if ( $egMapsEnableGeoCache && $coordinates ) { |
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self::$globalGeocoderCache[$address] = $coordinates; |
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} |
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} |
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/** |
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* Registers a geocoder linked to an identifier. |
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* |
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* @since 0.7 |
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* |
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* @param string $geocoderIdentifier |
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* @param string $geocoderClassName |
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*/ |
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public static function registerGeocoder( $geocoderIdentifier, $geocoderClassName ) { |
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self::$registeredGeocoders[$geocoderIdentifier] = $geocoderClassName; |
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} |
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/** |
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* Returns the instance of the geocoder linked to the provided identifier |
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* or the default one when it's not valid. False is returned when there |
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* are no geocoders available. |
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* |
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* @since 0.7 |
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* |
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* @param string $geocoderIdentifier |
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* |
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* @return Geocoder|bool |
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*/ |
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protected static function getValidGeocoderInstance( $geocoderIdentifier ) { |
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return self::getGeocoderInstance( self::getValidGeocoderIdentifier( $geocoderIdentifier ) ); |
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} |
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/** |
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* Returns the instance of a geocoder. This function assumes there is a |
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* geocoder linked to the identifier you provide - if you are not sure |
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* it does, use getValidGeocoderInstance instead. |
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* |
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* @since 0.7 |
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* |
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* @param string $geocoderIdentifier |
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* |
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* @return Geocoder|bool |
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* @throws MWException |
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*/ |
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protected static function getGeocoderInstance( $geocoderIdentifier ) { |
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if ( !array_key_exists( $geocoderIdentifier, self::$geocoders ) ) { |
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if ( array_key_exists( $geocoderIdentifier, self::$registeredGeocoders ) ) { |
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$geocoder = new self::$registeredGeocoders[$geocoderIdentifier]( $geocoderIdentifier ); |
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//if ( $service instanceof iMappingService ) { |
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self::$geocoders[$geocoderIdentifier] = $geocoder; |
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//} |
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//else { |
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// throw new MWException( 'The geocoder linked to identifier ' . $geocoderIdentifier . ' does not implement .' ); |
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//} |
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} |
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else { |
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throw new MWException( 'There is geocoder linked to identifier ' . $geocoderIdentifier . '.' ); |
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} |
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} |
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return self::$geocoders[$geocoderIdentifier]; |
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} |
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/** |
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* Returns a valid geocoder idenifier. If the given one is a valid main identifier, |
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* it will simply be returned. If it's an alias, it will be turned into the correponding |
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* main identifier. If it's not recognized at all (or empty), the default will be used. |
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* Only call this function when there are geocoders available, else an erro will be thrown. |
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* |
372
|
|
|
* @since 0.7 |
373
|
|
|
* |
374
|
|
|
* @param string $geocoderIdentifier |
375
|
|
|
* |
376
|
|
|
* @return string|bool |
377
|
|
|
* @throws MWException |
378
|
|
|
*/ |
379
|
|
|
protected static function getValidGeocoderIdentifier( $geocoderIdentifier ) { |
380
|
|
|
global $egMapsDefaultGeoService; |
381
|
|
|
static $validatedDefault = false; |
382
|
|
|
|
383
|
|
|
if ( $geocoderIdentifier === '' || !array_key_exists( $geocoderIdentifier, self::$registeredGeocoders ) ) { |
384
|
|
|
if ( !$validatedDefault ) { |
385
|
|
|
if ( !array_key_exists( $egMapsDefaultGeoService, self::$registeredGeocoders ) ) { |
386
|
|
|
$services = array_keys( self::$registeredGeocoders ); |
387
|
|
|
$egMapsDefaultGeoService = array_shift( $services ); |
388
|
|
|
if ( is_null( $egMapsDefaultGeoService ) ) { |
389
|
|
|
throw new MWException( 'Tried to geocode while there are no geocoders available at ' . __METHOD__ ); |
390
|
|
|
} |
391
|
|
|
} |
392
|
|
|
} |
393
|
|
|
|
394
|
|
|
if ( array_key_exists( $egMapsDefaultGeoService, self::$registeredGeocoders ) ) { |
395
|
|
|
$geocoderIdentifier = $egMapsDefaultGeoService; |
396
|
|
|
} |
397
|
|
|
else { |
398
|
|
|
return false; |
399
|
|
|
} |
400
|
|
|
} |
401
|
|
|
|
402
|
|
|
return $geocoderIdentifier; |
403
|
|
|
} |
404
|
|
|
|
405
|
|
|
} |
406
|
|
|
|
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.