1 files changed, 116 insertions, 0 deletions
diff --git a/www/wiki/extensions/Mermaid/src/HookRegistry.php b/www/wiki/extensions/Mermaid/src/HookRegistry.php
new file mode 100644
index 00000000..f6fac542
--- /dev/null
+++ b/www/wiki/extensions/Mermaid/src/HookRegistry.php
@@ -0,0 +1,116 @@
+<?php
+
+namespace Mermaid;
+
+use Hooks;
+
+/**
+ * @license GNU GPL v2+
+ * @since 1.0
+ *
+ * @author mwjames
+ */
+class HookRegistry {
+
+	/**
+	 * @var array
+	 */
+	private $handlers = array();
+
+	/**
+	 * @since 1.0
+	 *
+	 * @param array $configuration
+	 */
+	public function __construct( $configuration = array () ) {
+		$this->registerCallbackHandlers( $configuration );
+	}
+
+	/**
+	 * @since  1.0
+	 */
+	public function register() {
+		foreach ( $this->handlers as $name => $callback ) {
+			Hooks::register( $name, $callback );
+		}
+	}
+
+	/**
+	 * @since  1.0
+	 */
+	public function deregister() {
+		foreach ( array_keys( $this->handlers ) as $name ) {
+			Hooks::clear( $name );
+		}
+	}
+
+	/**
+	 * @since  1.0
+	 *
+	 * @param string $name
+	 *
+	 * @return Callable|false
+	 */
+	public function getHandlerFor( $name ) {
+		return isset( $this->handlers[$name] ) ? $this->handlers[$name] : false;
+	}
+
+	/**
+	 * @since  1.0
+	 *
+	 * @param string $name
+	 *
+	 * @return boolean
+	 */
+	public function isRegistered( $name ) {
+		return Hooks::isRegistered( $name );
+	}
+
+	private function registerCallbackHandlers( $configuration ) {
+
+		/**
+		 * @see https://www.mediawiki.org/wiki/Manual:Hooks/ParserFirstCallInit
+		 */
+		$this->handlers['ParserFirstCallInit'] = function ( &$parser ) {
+			$defaultTheme = $GLOBALS['mermaidgDefaultTheme'];
+
+			$parser->setFunctionHook(
+				'mermaid',
+				MermaidParserFunction::newCallback( $defaultTheme ),
+				0
+			);
+
+			return true;
+		};
+
+		/**
+		 * @see https://www.mediawiki.org/wiki/Manual:Hooks/ResourceLoaderGetConfigVars
+		 */
+		$this->handlers['ResourceLoaderGetConfigVars'] = function ( &$vars ) {
+
+			$vars['mermaid'] = [
+				'theme' => $GLOBALS['mermaidgDefaultTheme']
+			];
+
+			return true;
+		};
+
+		/**
+		 * @see https://www.mediawiki.org/wiki/Manual:Hooks/OutputPageParserOutput
+		 */
+		$this->handlers['OutputPageParserOutput'] = function ( $out, $parserOutput ) {
+
+			$out->addModuleStyles( 'ext.mermaid.styles' );
+
+			if ( $parserOutput->getExtensionData( 'ext-mermaid' ) === null ||
+				$parserOutput->getExtensionData( 'ext-mermaid' ) === false ) {
+				return true;
+			}
+
+			$out->addModules( 'ext.mermaid' );
+
+			return true;
+		};
+	}
+
+}