1 files changed, 60 insertions, 0 deletions
diff --git a/browser/components/newtab/lib/TippyTopProvider.sys.mjs b/browser/components/newtab/lib/TippyTopProvider.sys.mjs
new file mode 100644
index 0000000000..8f32516119
--- /dev/null
+++ b/browser/components/newtab/lib/TippyTopProvider.sys.mjs
@@ -0,0 +1,60 @@
+/* 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/. */
+
+const TIPPYTOP_PATH = "chrome://activity-stream/content/data/content/tippytop/";
+const TIPPYTOP_JSON_PATH =
+  "chrome://activity-stream/content/data/content/tippytop/top_sites.json";
+
+/*
+ * Get a domain from a url optionally stripping subdomains.
+ */
+export function getDomain(url, strip = "www.") {
+  let domain = "";
+  try {
+    domain = new URL(url).hostname;
+  } catch (ex) {}
+  if (strip === "*") {
+    try {
+      domain = Services.eTLD.getBaseDomainFromHost(domain);
+    } catch (ex) {}
+  } else if (domain.startsWith(strip)) {
+    domain = domain.slice(strip.length);
+  }
+  return domain;
+}
+
+export class TippyTopProvider {
+  constructor() {
+    this._sitesByDomain = new Map();
+    this.initialized = false;
+  }
+
+  async init() {
+    // Load the Tippy Top sites from the json manifest.
+    try {
+      for (const site of await (
+        await fetch(TIPPYTOP_JSON_PATH, {
+          credentials: "omit",
+        })
+      ).json()) {
+        for (const domain of site.domains) {
+          this._sitesByDomain.set(domain, site);
+        }
+      }
+      this.initialized = true;
+    } catch (error) {
+      console.error("Failed to load tippy top manifest.");
+    }
+  }
+
+  processSite(site, strip) {
+    const tippyTop = this._sitesByDomain.get(getDomain(site.url, strip));
+    if (tippyTop) {
+      site.tippyTopIcon = TIPPYTOP_PATH + tippyTop.image_url;
+      site.smallFavicon = TIPPYTOP_PATH + tippyTop.favicon_url;
+      site.backgroundColor = tippyTop.background_color;
+    }
+    return site;
+  }
+}