Allow third-party resources to customize the SEO image

Context::addMetaImage() 메소드를 사용하여 특정 페이지 공유시 SNS에 표시되는
이미지를 좀더 세부적으로 커스터마이징할 수 있습니다.

classes/context/Context.class.php

@@ -73,6 +73,7 @@ class Context
 	 * @var array
 	 */
 	public $meta_tags = array();
+	public $meta_images = array();
 
 	/**
 	 * OpenGraph metadata
@@ -2631,6 +2632,42 @@ class Context
 		self::$_instance->meta_tags[$name] = array('is_http_equiv' => (bool)$is_http_equiv, 'content' => $content);
 	}
 	
+	/**
+	 * Get meta images
+	 * 
+	 * @return array
+	 */
+	public static function getMetaImages()
+	{
+		return self::$_instance->meta_images;
+	}
+	
+	/**
+	 * Add meta image
+	 *
+	 * @param string $filename
+	 * @param int $width
+	 * @param int $height
+	 * @return void
+	 */
+	public static function addMetaImage($filename, $width = 0, $height = 0)
+	{
+		$filename = preg_replace('/^[.\\\\\\/]+/', '', $filename);
+		if (!file_exists(\RX_BASEDIR . $filename))
+		{
+			return;
+		}
+		if ($width == 0 || $height == 0)
+		{
+			list($width, $height) = getimagesize(\RX_BASEDIR . $filename);
+		}
+		self::$_instance->meta_images[] = array(
+			'filepath' => $filename . '?' . date('YmdHis', filemtime(\RX_BASEDIR . $filename)),
+			'width' => $width,
+			'height' => $height,
+		);
+	}
+	
 	/**
 	 * Get OpenGraph metadata
 	 * 

classes/display/HTMLDisplayHandler.php

@@ -500,7 +500,11 @@ class HTMLDisplayHandler
 		}
 		
 		// Add image.
-		if ($page_type === 'article' && $permitted && config('seo.og_extract_images'))
+		if ($document_images = Context::getMetaImages())
+		{
+			// pass
+		}
+		elseif ($page_type === 'article' && $permitted && config('seo.og_extract_images'))
 		{
 			if (($document_images = Rhymix\Framework\Cache::get("seo:document_images:$document_srl")) === null)
 			{