feat: embed yt-videos as iframes

init.php

@@ -0,0 +1,46 @@
+<?php
+class YFrames extends Plugin {
+
+	private $host;
+
+	function about() {
+		return array(1.0,
+		             "iFrames for Youtube feeds",
+		             "phga");
+	}
+
+	function init($host) {
+		$this->host = $host;
+
+		$host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
+		$host->add_hook($host::HOOK_IFRAME_WHITELISTED, $this);
+	}
+
+	function hook_iframe_whitelisted($src) {
+		return in_array($src, ["www.youtube.com", "youtube.com", "youtu.be"]);
+	}
+
+	function hook_article_filter($article) {
+
+		// Match allowed links and extract "video ID"
+        if (preg_match_all("/.*(youtube|youtu)\.(com|be)\/watch\?v=([\w\d_-]+).*/i",
+                           $article["link"], $matches, PREG_PATTERN_ORDER)) {
+
+            if ($matches[3][0]) {
+                $link = "https://www.youtube.com/embed/" . $matches[3][0];
+                $attributes = "width='819' height='460' class='youtube-player' allowfullscreen";
+                $yframe = "<iframe src='$link' $attributes></iframe>";
+
+                $article["content"] = $yframe;
+            }
+        }
+
+        $article["content"] .= "<br/>" . $link;
+		return $article;
+	}
+
+	function api_version() {
+		return 2;
+	}
+
+}