1 files changed, 150 insertions, 0 deletions
diff --git a/www/wiki/extensions/OpenGraphMeta/OpenGraphMeta.class.php b/www/wiki/extensions/OpenGraphMeta/OpenGraphMeta.class.php
new file mode 100644
index 00000000..d015718f
--- /dev/null
+++ b/www/wiki/extensions/OpenGraphMeta/OpenGraphMeta.class.php
@@ -0,0 +1,150 @@
+<?php
+/**
+ * OpenGraphMeta
+ *
+ * @file
+ * @ingroup Extensions
+ * @author Daniel Friesen (http://danf.ca/mw/)
+ * @author Southparkfan
+ * @license GPL-2.0-or-later
+ * @link https://www.mediawiki.org/wiki/Extension:OpenGraphMeta Documentation
+ */
+
+class OpenGraphMeta {
+	/**
+	 * @param Parser $parser
+	 */
+	public static function onParserFirstCallInit( Parser $parser ) {
+		$parser->setFunctionHook( 'setmainimage', [ __CLASS__, 'setMainImagePF' ] );
+		$parser->setFunctionHook( 'setmaintitle', [ __CLASS__, 'setMainTitlePF' ] );
+	}
+
+	/**
+	 * @param Parser $parser
+	 * @param string $mainImage
+	 * @return string
+	 */
+	public static function setMainImagePF( Parser $parser, $mainImage ) {
+		$parserOutput = $parser->getOutput();
+		$setMainImage = $parserOutput->getExtensionData( 'setmainimage' );
+		if ( $setMainImage !== null ) {
+			return $mainImage;
+		}
+
+		if ( $mainImage !== '' ) {
+			$file = Title::newFromText( $mainImage, NS_FILE );
+			$parserOutput->setExtensionData( 'setmainimage', $file->getDBKey() );
+			return $mainImage;
+		}
+	}
+
+	/**
+	 * @param Parser $parser
+	 * @param string $mainTitle
+	 * @return string
+	 */
+	public static function setMainTitlePF( Parser $parser, $mainTitle ) {
+		$parserOutput = $parser->getOutput();
+		$setMainTitle = $parserOutput->getExtensionData( 'setmaintitle' );
+		if ( $setMainTitle !== null ) {
+			return $mainTitle;
+		}
+
+		$parserOutput->setExtensionData( 'setmaintitle', $mainTitle );
+
+		return $mainTitle;
+	}
+
+	/**
+	 * @param OutputPage &$out
+	 * @param ParserOutput $parserOutput
+	 */
+	public static function onOutputPageParserOutput( OutputPage &$out, ParserOutput $parserOutput ) {
+		global $wgLogo, $wgSitename, $wgXhtmlNamespaces, $egFacebookAppId, $egFacebookAdmins, $bannerImage;
+		$setMainImage = $parserOutput->getExtensionData( 'setmainimage' );
+		$setMainTitle = $parserOutput->getExtensionData( 'setmaintitle' );
+
+		if ( $setMainImage !== null ) {
+			// $mainImage = wfFindFile( Title::newFromDBkey( $setMainImage ) );
+			if (filter_var($setMainImage, FILTER_VALIDATE_URL) === FALSE) {
+					$mainImage = wfFindFile(Title::newFromText( $setMainImage , NS_FILE ));
+			} else {
+					$mainImage = $setMainImage;
+			}
+		} else {
+			$mainImage = false;
+		}
+
+		$wgXhtmlNamespaces['og'] = 'http://opengraphprotocol.org/schema/';
+		$title = $out->getTitle();
+		$isMainpage = $title->isMainPage();
+
+		$meta = [];
+
+		if ( $isMainpage ) {
+			$meta['og:type'] = 'website';
+			$meta['og:title'] = $wgSitename;
+		} else {
+			$meta['og:type'] = 'article';
+			$meta['og:site_name'] = $wgSitename;
+			// Try to choose the most appropriate title for showing in news feeds.
+			if (
+				( defined( 'NS_BLOG_ARTICLE' ) && $title->getNamespace() == NS_BLOG_ARTICLE ) ||
+				( defined( 'NS_BLOG_ARTICLE_TALK' ) && $title->getNamespace() == NS_BLOG_ARTICLE_TALK )
+			) {
+				$meta['og:title'] = $title->getSubpageText();
+			} else {
+				$meta['og:title'] = $title->getText();
+			}
+		}
+
+		// {{#setmaintitle}} was used, override og:title value
+		if ( $setMainTitle !== null ) {
+			$meta['og:title'] = $setMainTitle;
+		}
+
+		if ( ( $mainImage !== false ) ) {
+			if (filter_var($mainImage, FILTER_VALIDATE_URL) === FALSE) {
+				// The official OpenGraph documentation says:
+				// - thumbnail previews can't be smaller than 200px x 200px
+				// - thumbnail previews look best at 1200px x 630px
+				// @see https://developers.facebook.com/docs/sharing/best-practices/
+				// @see https://phabricator.wikimedia.org/T193986
+				$meta['og:image'] = wfExpandUrl( $mainImage->createThumb( 1200, 630 ) );
+				$bannerImage = wfExpandUrl( $mainImage->createThumb( 1200, 630 ) );
+
+			} else {
+				// In some edge-cases we won't have defined an object but rather a full URL.
+				$meta['og:image'] = $mainImage;
+				$bannerImage = $mainImage;
+			}
+		} elseif ( $isMainpage ) {
+			$meta['og:image'] = wfExpandUrl( $wgLogo );
+		}
+		$description = $parserOutput->getProperty( 'description' );
+		if ( $description !== false ) { // set by Description2 extension, install it if you want proper og:description support
+			$meta['og:description'] = $description;
+		}
+		$meta['og:url'] = $title->getFullURL();
+		if ( $egFacebookAppId ) {
+			$meta['fb:app_id'] = $egFacebookAppId;
+		}
+		if ( $egFacebookAdmins ) {
+			$meta['fb:admins'] = $egFacebookAdmins;
+		}
+
+		foreach ( $meta as $property => $value ) {
+			if ( $value ) {
+				$out->addHeadItem(
+					"meta:property:$property",
+					'	' . Html::element( 'meta', [
+						'property' => $property,
+						'content' => $value
+					] ) . "\n"
+				);
+			}
+		}
+		$out->addScript("<style>.bannerimage {background-image:url('{$bannerImage}');}</style>");
+	}
+
+}