diff --git a/lib/classes/local/url_unfurl.php b/lib/classes/local/url_unfurl.php
new file mode 100644
index 0000000000..37d3d3fec9
--- /dev/null
+++ b/lib/classes/local/url_unfurl.php
@@ -0,0 +1,130 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Receives Open Graph protocol metadata (a.k.a social media metadata) from link
+ *
+ * @package    core
+ * @copyright  2021 Jon Green <jgreen01@stanford.edu>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class unfurl {
+    public $title = '';
+    public $site_name = '';
+    public $image = '';
+    public $description = '';
+    public $canonical_url = '';
+    public $no_og_metadata = true;
+
+    function __construct($url) {
+        $html = file_get_contents($url);
+
+        $doc = new DOMDocument();
+        @$doc->loadHTML('<?xml encoding="UTF-8">' . $html);
+        $meta_tag_list = $doc->getElementsByTagName('meta');
+
+        foreach($meta_tag_list as $meta_tag) {
+            $property_attribute = strtolower(s($meta_tag->getAttribute('property')));
+            if (
+                !empty($property_attribute) &&
+                preg_match ('/^og:\w+/i', $property_attribute) === 1
+            ) {
+                $this->no_og_metadata = false;
+                break;
+            }
+        }
+
+        if ($this->no_og_metadata) {
+            return;
+        }
+
+        foreach($meta_tag_list as $meta_tag) {
+            $property_attribute = strtolower(s($meta_tag->getAttribute('property')));
+            $content_attribute = s($meta_tag->getAttribute('content'));
+            if (
+                !empty($property_attribute) &&
+                !empty($content_attribute) &&
+                preg_match ('/^og:\w+/i', $property_attribute) === 1
+            ) {
+                switch ($property_attribute) {
+                    case 'og:title':
+                        $this->title = $content_attribute;
+                        break;
+                    case 'og:site_name':
+                        $this->site_name = $content_attribute;
+                        break;
+                    case 'og:image':
+                        $imageurl_parts = parse_url($content_attribute);
+                        // Some websites only give the path
+                        if (empty($imageurl_parts['host']) && !empty($imageurl_parts['path'])) {
+                            $url_parts = parse_url($url);
+                            $this->image = $url_parts['scheme'].'://'.$url_parts['host'].$imageurl_parts['path'];
+                        } else {
+                            $this->image = $content_attribute;
+                        }
+                        break;
+                    case 'og:description':
+                        $this->description = $content_attribute;
+                        break;
+                    case 'og:url':
+                        $this->canonical_url = $content_attribute;
+                        break;
+                    default:
+                        break;
+                }
+            }
+        }
+    }
+}
+
+/**
+ * Receives and stores unfurled link meta data
+ *
+ * @package    core
+ * @copyright  2021 Jon Green <jgreen01@stanford.edu>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class unfurl_store {
+    private static $instance = null;
+    private $cache;
+
+    private function __construct() {
+        $this->cache = cache::make('core', 'unfurl');
+    }
+
+    public static function get_instance() {
+        if (self::$instance == null) {
+            self::$instance = new unfurl_store();
+        }
+
+        return self::$instance;
+    }
+
+    public function get_unfurl($url) {
+        $data = $this->cache->get($url);
+
+        if ($data) {
+            return $data;
+        }
+
+        $new_data = new unfurl($url);
+        $this->cache->set($url, $new_data);
+
+        return $new_data;
+    }
+}
\ No newline at end of file