add HOOK_ARTICLE_IMAGE for Article::get_article_image()

classes/article.php

@@ -828,59 +828,65 @@ class Article extends Handler_Protected {
 		$article_image = "";
 		$article_stream = "";
 
-		$tmpdoc = new DOMDocument();
-
-		if (@$tmpdoc->loadHTML('<?xml encoding="UTF-8">' . mb_substr($content, 0, 131070))) {
-			$tmpxpath = new DOMXPath($tmpdoc);
-			$elems = $tmpxpath->query('(//img[@src]|//video[@poster]|//iframe[contains(@src , "youtube.com/embed/")])');
-
-			foreach ($elems as $e) {
-				if ($e->nodeName == "iframe") {
-					$matches = [];
-					if ($rrr = preg_match("/\/embed\/([\w-]+)/", $e->getAttribute("src"), $matches)) {
-						$article_image = "https://img.youtube.com/vi/" . $matches[1] . "/hqdefault.jpg";
-						$article_stream = "https://youtu.be/" . $matches[1];
-						break;
-					}
-				} else if ($e->nodeName == "video") {
-					$article_image = $e->getAttribute("poster");
+		foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_ARTICLE_IMAGE) as $p) {
+			list ($article_image, $article_stream) = $p->hook_article_image($enclosures, $content, $site_url);
+		}
 
-					$src = $tmpxpath->query("//source[@src]", $e)->item(0);
+		if (!$article_image && !$article_stream) {
+			$tmpdoc = new DOMDocument();
 
-					if ($src) {
-						$article_stream = $src->getAttribute("src");
-					}
+			if (@$tmpdoc->loadHTML('<?xml encoding="UTF-8">' . mb_substr($content, 0, 131070))) {
+				$tmpxpath = new DOMXPath($tmpdoc);
+				$elems = $tmpxpath->query('(//img[@src]|//video[@poster]|//iframe[contains(@src , "youtube.com/embed/")])');
 
-					break;
-				} else if ($e->nodeName == 'img') {
-					if (mb_strpos($e->getAttribute("src"), "data:") !== 0) {
-						$article_image = $e->getAttribute("src");
+				foreach ($elems as $e) {
+					if ($e->nodeName == "iframe") {
+						$matches = [];
+						if ($rrr = preg_match("/\/embed\/([\w-]+)/", $e->getAttribute("src"), $matches)) {
+							$article_image = "https://img.youtube.com/vi/" . $matches[1] . "/hqdefault.jpg";
+							$article_stream = "https://youtu.be/" . $matches[1];
+							break;
+						}
+					} else if ($e->nodeName == "video") {
+						$article_image = $e->getAttribute("poster");
+
+						$src = $tmpxpath->query("//source[@src]", $e)->item(0);
+
+						if ($src) {
+							$article_stream = $src->getAttribute("src");
+						}
+
+						break;
+					} else if ($e->nodeName == 'img') {
+						if (mb_strpos($e->getAttribute("src"), "data:") !== 0) {
+							$article_image = $e->getAttribute("src");
+						}
+						break;
 					}
-					break;
 				}
 			}
-		}
 
-		if ($article_image)
-			$article_image = rewrite_relative_url($site_url, $article_image);
+			if (!$article_image)
+				foreach ($enclosures as $enc) {
+					if (strpos($enc["content_type"], "image/") !== FALSE) {
+						$article_image = $enc["content_url"];
+						break;
+					}
+				}
 
-		if ($article_stream)
-			$article_stream = rewrite_relative_url($site_url, $article_stream);
+			if ($article_image)
+				$article_image = rewrite_relative_url($site_url, $article_image);
 
-		if (!$article_image)
-			foreach ($enclosures as $enc) {
-				if (strpos($enc["content_type"], "image/") !== FALSE) {
-					$article_image = rewrite_relative_url($site_url, $enc["content_url"]);
-					break;
-				}
-			}
+			if ($article_stream)
+				$article_stream = rewrite_relative_url($site_url, $article_stream);
+		}
 
 		$cache = new DiskCache("images");
 
-		if ($cache->exists(sha1($article_image)))
+		if ($article_image && $cache->exists(sha1($article_image)))
 			$article_image = $cache->getUrl(sha1($article_image));
 
-		if ($cache->exists(sha1($article_stream)))
+		if ($article_stream && $cache->exists(sha1($article_stream)))
 			$article_stream = $cache->getUrl(sha1($article_stream));
 
 		return [$article_image, $article_stream];

classes/pluginhost.php

@@ -59,6 +59,7 @@ class PluginHost {
 	const HOOK_SEND_MAIL = 39;
 	const HOOK_FILTER_TRIGGERED = 40;
 	const HOOK_GET_FULL_TEXT = 41;
+	const HOOK_ARTICLE_IMAGE = 42;
 
 	const KIND_ALL = 1;
 	const KIND_SYSTEM = 2;