1 files changed, 46 insertions, 0 deletions
diff --git a/browser/components/pagedata/OpenGraphPageData.sys.mjs b/browser/components/pagedata/OpenGraphPageData.sys.mjs
new file mode 100644
index 0000000000..8f8b361799
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+++ b/browser/components/pagedata/OpenGraphPageData.sys.mjs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Collects Open Graph (https://opengraphprotocol.org/) related data from a page.
+ */
+export const OpenGraphPageData = {
+  /**
+   * Collects the opengraph data from the page.
+   *
+   * @param {Document} document
+   *   The document to collect from
+   *
+   * @returns {PageData}
+   */
+  collect(document) {
+    let pageData = {};
+
+    // Sites can technically define an Open Graph prefix other than `og:`.
+    // However, `og:` is one of the default RDFa prefixes and it's likely
+    // uncommon that sites use a custom prefix. If we find that metadata is
+    // missing for common sites due to this issue, we could consider adding a
+    // basic RDFa parser.
+    let openGraphTags = document.querySelectorAll("meta[property^='og:'");
+
+    for (let tag of openGraphTags) {
+      // Strip "og:" from the property name.
+      let propertyName = tag.getAttribute("property").substring(3);
+
+      switch (propertyName) {
+        case "description":
+          pageData.description = tag.getAttribute("content");
+          break;
+        case "site_name":
+          pageData.siteName = tag.getAttribute("content");
+          break;
+        case "image":
+          pageData.image = tag.getAttribute("content");
+          break;
+      }
+    }
+
+    return pageData;
+  },
+};