Bug 1713698 - Add a SmartBlock shim for Amazon TAM; r=denschub,webcompat-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D120240

browser/extensions/webcompat/data/shims.js

@@ -116,6 +116,14 @@ const AVAILABLE_SHIMS = [
     matches: ["*://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"],
     onlyIfBlockedByETP: true,
   },
+  {
+    id: "AmazonTAM",
+    platform: "all",
+    name: "Amazon Transparent Ad Marketplace",
+    bug: "1713698",
+    file: "apstag.js",
+    matches: ["*://c.amazon-adsystem.com/aax2/apstag.js"],
+  },
   {
     id: "BmAuth",
     platform: "all",

browser/extensions/webcompat/manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": 2,
   "name": "Web Compatibility Interventions",
   "description": "Urgent post-release fixes for web compatibility.",
-  "version": "24.4.0",
+  "version": "24.5.0",
 
   "applications": {
     "gecko": {
@@ -91,6 +91,7 @@
 
   "web_accessible_resources": [
     "shims/adsafeprotected-ima.js",
+    "shims/apstag.js",
     "shims/bmauth.js",
     "shims/chartbeat.js",
     "shims/eluminate.js",

browser/extensions/webcompat/moz.build

@@ -80,6 +80,7 @@ FINAL_TARGET_FILES.features["webcompat@mozilla.org"]["injections"]["js"] += [
 
 FINAL_TARGET_FILES.features["webcompat@mozilla.org"]["shims"] += [
     "shims/adsafeprotected-ima.js",
+    "shims/apstag.js",
     "shims/bmauth.js",
     "shims/chartbeat.js",
     "shims/eluminate.js",

browser/extensions/webcompat/shims/apstag.js

@@ -0,0 +1,71 @@
+/* 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/. */
+
+"use strict";
+
+/**
+ * Bug 1713698 - Shim Amazon Transparent Ad Marketplace's apstag.js
+ *
+ * Some sites such as politico.com rely on Amazon TAM tracker to serve ads,
+ * breaking functionality like galleries if it is blocked. This shim helps
+ * mitigate major breakage in that case.
+ */
+
+if (!window.apstag?._getSlotIdToNameMapping) {
+  const _Q = window.apstag?._Q || [];
+
+  const newBid = config => {
+    return {
+      amznbid: "",
+      amzniid: "",
+      amznp: "",
+      amznsz: "0x0",
+      size: "0x0",
+      slotID: config.slotID,
+    };
+  };
+
+  window.apstag = {
+    _Q,
+    _getSlotIdToNameMapping() {},
+    bids() {},
+    debug() {},
+    deleteId() {},
+    fetchBids(cfg, cb) {
+      if (!Array.isArray(cfg?.slots)) {
+        return;
+      }
+      cb(cfg.slots.map(s => newBid(s)));
+    },
+    init() {},
+    punt() {},
+    renderImp() {},
+    renewId() {},
+    setDisplayBids() {},
+    targetingKeys: () => [],
+    thirdPartyData: {},
+    updateId() {},
+  };
+
+  window.apstagLOADED = true;
+
+  _Q.push = function(prefix, args) {
+    try {
+      switch (prefix) {
+        case "f":
+          window.apstag.fetchBids(...args);
+          break;
+        case "i":
+          window.apstag.init(...args);
+          break;
+      }
+    } catch (e) {
+      console.trace(e);
+    }
+  };
+
+  for (const cmd of _Q) {
+    _Q.push(cmd);
+  }
+}