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<?php |
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/** |
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* Base class for mapping services. Deriving classes hold mapping service specific |
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* information and functionality, which can be used by any mapping feature. |
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* |
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* @since 0.6.3 |
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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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abstract class MapsMappingService { |
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/** |
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* The internal name of the service. |
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* |
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* @var string |
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*/ |
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protected $serviceName; |
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/** |
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* A list of aliases for the internal name. |
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* |
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* @var array |
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*/ |
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protected $aliases; |
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/** |
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* A list of features that support the service, used for validation and defaulting. |
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* |
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* @var array |
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*/ |
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protected $features; |
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/** |
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* A list of names of resource modules to add. |
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* |
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* @var array |
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*/ |
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protected $resourceModules = []; |
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/** |
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* A list of dependencies (header items) that have been added. |
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* |
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* @var array |
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*/ |
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private $addedDependencies = []; |
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/** |
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* A list of dependencies (header items) that need to be added. |
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* |
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* @var array |
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*/ |
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private $dependencies = []; |
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/** |
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* @param string $serviceName |
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* @param array $aliases |
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*/ |
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public function __construct( $serviceName, array $aliases = [] ) { |
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$this->serviceName = $serviceName; |
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$this->aliases = $aliases; |
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} |
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/** |
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* @since 0.7 |
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* |
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* @param $parameterInfo array of IParam |
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*/ |
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public function addParameterInfo( array &$parameterInfo ) { |
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} |
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/** |
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* @since 0.6.3 |
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*/ |
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public function addFeature( $featureName, $handlingClass ) { |
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$this->features[$featureName] = $handlingClass; |
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} |
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/** |
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* @since 5.2.0 |
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* @param ParserOutput $parserOutput |
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*/ |
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public final function addDependencies( ParserOutput $parserOutput ) { |
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$dependencies = $this->getDependencyHtml(); |
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// Only add a head item when there are dependencies. |
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if ( $dependencies ) { |
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$parserOutput->addHeadItem( $dependencies ); |
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} |
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$parserOutput->addModules( $this->getResourceModules() ); |
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} |
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/** |
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* @since 0.6.3 |
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*/ |
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public final function getDependencyHtml() { |
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$allDependencies = array_merge( $this->getDependencies(), $this->dependencies ); |
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$dependencies = []; |
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// Only add dependencies that have not yet been added. |
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foreach ( $allDependencies as $dependency ) { |
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if ( !in_array( $dependency, $this->addedDependencies ) ) { |
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$dependencies[] = $dependency; |
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$this->addedDependencies[] = $dependency; |
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} |
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} |
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// If there are dependencies, put them all together in a string, otherwise return false. |
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return $dependencies !== [] ? implode( '', $dependencies ) : false; |
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} |
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/** |
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* Returns a list of html fragments, such as script includes, the current service depends on. |
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* |
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* @since 0.6.3 |
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* |
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* @return array |
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*/ |
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protected function getDependencies() { |
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return []; |
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} |
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/** |
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* Returns the resource modules that need to be loaded to use this mapping service. |
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* |
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* @since 0.7.3 |
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* |
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* @return array of string |
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*/ |
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public function getResourceModules() { |
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return $this->resourceModules; |
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} |
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/** |
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* @since 0.6.3 |
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*/ |
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public function getName() { |
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return $this->serviceName; |
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} |
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/** |
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* @since 0.6.6 |
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*/ |
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public function getFeatureInstance( $featureName ) { |
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$className = $this->getFeature( $featureName ); |
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if ( $className === false || !class_exists( $className ) ) { |
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throw new MWException( 'Could not create a mapping feature class instance' ); |
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} |
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return new $className( $this ); |
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} |
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/** |
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* @since 0.6.3 |
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*/ |
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public function getFeature( $featureName ) { |
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return array_key_exists( $featureName, $this->features ) ? $this->features[$featureName] : false; |
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} |
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/** |
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* @since 0.6.3 |
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*/ |
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public function getAliases() { |
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return $this->aliases; |
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} |
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/** |
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* @since 0.6.3 |
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*/ |
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public function hasAlias( $alias ) { |
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return in_array( $alias, $this->aliases ); |
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} |
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/** |
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* Add one or more names of resource modules that should be loaded. |
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* |
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* @since 0.7.3 |
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* |
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* @param mixed $modules Array of string or string |
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*/ |
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public function addResourceModules( $modules ) { |
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$this->resourceModules = array_merge( $this->resourceModules, (array)$modules ); |
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} |
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/** |
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* @param array $dependencies |
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*/ |
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public function addHtmlDependencies( array $dependencies ) { |
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foreach ( $dependencies as $dependency ) { |
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$this->addHtmlDependency( $dependency ); |
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} |
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} |
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/** |
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* @since 0.6.3 |
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* |
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* @param $dependencyHtml |
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*/ |
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public final function addHtmlDependency( $dependencyHtml ) { |
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$this->dependencies[] = $dependencyHtml; |
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} |
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/** |
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* @since 1.0 |
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*/ |
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public function getEarthZoom() { |
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return 1; |
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} |
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public abstract function getMapId( $increment = true ); |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: