1 files changed, 98 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/ParserFunctions/InfoParserFunction.php b/www/wiki/extensions/SemanticMediaWiki/src/ParserFunctions/InfoParserFunction.php
new file mode 100644
index 00000000..482007d9
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/ParserFunctions/InfoParserFunction.php
@@ -0,0 +1,98 @@
+<?php
+
+namespace SMW\ParserFunctions;
+
+use ParamProcessor\ProcessingError;
+use ParamProcessor\ProcessingResult;
+use Parser;
+use ParserHooks\HookDefinition;
+use ParserHooks\HookHandler;
+use SMWOutputs;
+
+/**
+ * Class that provides the {{#info}} parser function
+ *
+ * @ingroup ParserFunction
+ *
+ * @author Markus Krötzsch
+ * @author Jeroen De Dauw
+ */
+class InfoParserFunction implements HookHandler {
+
+	/**
+	 * @param Parser $parser
+	 * @param ProcessingResult $result
+	 *
+	 * @return mixed
+	 */
+	public function handle( Parser $parser, ProcessingResult $result ) {
+		if ( $result->hasFatal() ) {
+			return $this->getOutputForErrors( $result->getErrors() );
+		}
+
+		$parameters = $result->getParameters();
+
+		if ( !isset( $parameters['message'] ) ) {
+			return '';
+		}
+
+		$message = $parser->mStripState ? $parser->mStripState->unstripBoth( $parameters[ 'message' ]->getValue() ) : $parameters[ 'message' ]->getValue();
+
+		if ( $message === '' ) {
+			return '';
+		}
+
+		/**
+		 * Non-escaping is safe bacause a user's message is passed through parser, which will
+		 * handle unsafe HTM elements.
+		 */
+		$result = smwfEncodeMessages(
+			[ $message ],
+			$parameters['icon']->getValue(),
+			' <!--br-->',
+			false // No escaping.
+		);
+
+		if ( !is_null( $parser->getTitle() ) && $parser->getTitle()->isSpecialPage() ) {
+			global $wgOut;
+			SMWOutputs::commitToOutputPage( $wgOut );
+		}
+		else {
+			SMWOutputs::commitToParser( $parser );
+		}
+
+		return $result;
+	}
+
+	/**
+	 * @param ProcessingError[] $errors
+	 * @return string
+	 */
+	private function getOutputForErrors( $errors ) {
+		// TODO: see https://github.com/SemanticMediaWiki/SemanticMediaWiki/issues/1485
+		return 'A fatal error occurred in the #info parser function';
+	}
+
+	public static function getHookDefinition() {
+		return new HookDefinition(
+			'info',
+			[
+				[
+					'name' => 'message',
+					'message' => 'smw-info-par-message',
+				],
+				[
+					'name' => 'icon',
+					'message' => 'smw-info-par-icon',
+					'default' => 'info',
+					'values' => [ 'info', 'warning', 'error', 'note' ],
+				],
+			],
+			[
+				'message',
+				'icon'
+			]
+		);
+	}
+
+}