1 files changed, 42 insertions, 0 deletions
diff --git a/browser/components/pagedata/TwitterPageData.sys.mjs b/browser/components/pagedata/TwitterPageData.sys.mjs
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+++ b/browser/components/pagedata/TwitterPageData.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 Twitter card (https://developer.twitter.com/en/docs/twitter-for-websites/)
+ * related data from a page.
+ */
+export const TwitterPageData = {
+  /**
+   * Collects the twitter data from the page.
+   *
+   * @param {Document} document
+   *   The document to collect from
+   *
+   * @returns {PageData}
+   */
+  collect(document) {
+    let pageData = {};
+
+    let twitterTags = document.querySelectorAll("meta[name^='twitter:'");
+
+    for (let tag of twitterTags) {
+      // Strip "twitter:" from the property name.
+      let propertyName = tag.getAttribute("name").substring(8);
+
+      switch (propertyName) {
+        case "site":
+          pageData.siteName = tag.getAttribute("content");
+          break;
+        case "description":
+          pageData.description = tag.getAttribute("content");
+          break;
+        case "image":
+          pageData.image = tag.getAttribute("content");
+          break;
+      }
+    }
+
+    return pageData;
+  },
+};