From e6d7c03dccb585426ef6f1a18ae3b4882df690d2 Mon Sep 17 00:00:00 2001
From: Piotr Dobrowolski <admin@tastycode.pl>
Date: Sun, 30 May 2021 23:35:32 +0200
Subject: [PATCH 1/3] appinfo: fix back button behaviour

Seems like YouTube dynamically changes back button behaviour based on
User-Agent. Changing user-agent is possible (as done by official app)
only after setting "trustLevel" to "netcast". This however also moves
"launchParams" from window.PalmSystem directly into window object, thus
the second minor change.
---
 appinfo.json | 4 ++++
 index.js     | 4 +++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/appinfo.json b/appinfo.json
index 278b28f6..d63573b3 100644
--- a/appinfo.json
+++ b/appinfo.json
@@ -11,6 +11,10 @@
   "accessibility": {
     "supportsAudioGuidance": true
   },
+  "vendorExtension": {
+      "userAgent": "$browserName$/$browserVersion$ ($platformName$-$platformVersion$), _TV_$chipSetName$/$firmwareVersion$ (LG, $modelName$, $networkMode$)"
+  },
+  "trustLevel": "netcast",
   "privilegedJail": true,
   "supportQuickStart": true,
   "dialAppName": "YouTube",
diff --git a/index.js b/index.js
index bfd30b17..85b3a5a9 100644
--- a/index.js
+++ b/index.js
@@ -18,7 +18,9 @@ function concatenateUrlAndGetParams(ytUrl, path) {
 }
 
 function main() {
-    const launchParameters = window.PalmSystem.launchParams;
+    const launchParameters = window.PalmSystem
+      ? window.PalmSystem.launchParams
+      : window.launchParams;
     const youtubeLaunchUrlPath = extractLaunchUrlParams(launchParameters);
 
     window.location = concatenateUrlAndGetParams(YOUTUBE_TV_URL, youtubeLaunchUrlPath);

From ee2e1077a1fcc9cfb2a5af0d4fda53a8404872bd Mon Sep 17 00:00:00 2001
From: Piotr Dobrowolski <admin@tastycode.pl>
Date: Sun, 30 May 2021 23:36:05 +0200
Subject: [PATCH 2/3] userscript: fix syntax unsupported on webOS 3.x

---
 webOSUserScripts/userScript.js | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/webOSUserScripts/userScript.js b/webOSUserScripts/userScript.js
index 14fabdf9..ed7ba6c9 100644
--- a/webOSUserScripts/userScript.js
+++ b/webOSUserScripts/userScript.js
@@ -11,8 +11,7 @@ const settings = {
 };
 
 function isRequestBlocked(requestType, url) {
-  
-  console.log(`[${requestType}] URL : ${url}`);
+  console.log("[" + requestType + "] URL : " + url);
 
   if (settings.disable_ads && YOUTUBE_AD_REGEX.test(url)) {
     console.log("%cBLOCK AD", "color: red;", url);
@@ -25,37 +24,36 @@ function isRequestBlocked(requestType, url) {
   }
 
   return false;
-
-};
+}
 
 /**
  * Reference - https://gist.github.com/sergeimuller/a609a9df7d30e2625a177123797471e2
- * 
+ *
  * Wrapper over XHR.
  */
 const origOpen = XMLHttpRequest.prototype.open;
-XMLHttpRequest.prototype.open = function (...args) {
+XMLHttpRequest.prototype.open = function () {
   const requestType = "XHR";
-  const url = args[1];
+  const url = arguments[1];
 
   if (isRequestBlocked(requestType, url)) {
     throw "Blocked";
   }
 
-  origOpen.apply(this, args);
+  origOpen.apply(this, arguments);
 };
 
 /**
  * Wrapper over Fetch.
  */
-const origFetch = fetch;
-fetch = function (...args) {
+const origFetch = window.fetch;
+fetch = function () {
   const requestType = "FETCH";
-  const url = args[0];
+  const url = arguments[0];
 
   if (isRequestBlocked(requestType, url)) {
     return;
   }
-  return origFetch(...args);
+  return origFetch.apply(this, arguments);
 
 };

From c6f4180516d9d43d092ca6db4355b33ef529346a Mon Sep 17 00:00:00 2001
From: Piotr Dobrowolski <admin@tastycode.pl>
Date: Sun, 30 May 2021 23:38:55 +0200
Subject: [PATCH 3/3] userscript: add newer ad filtering based on uBlock Origin
 rules

---
 webOSUserScripts/userScript.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/webOSUserScripts/userScript.js b/webOSUserScripts/userScript.js
index ed7ba6c9..f715a2e1 100644
--- a/webOSUserScripts/userScript.js
+++ b/webOSUserScripts/userScript.js
@@ -55,5 +55,22 @@ fetch = function () {
     return;
   }
   return origFetch.apply(this, arguments);
+};
 
+/**
+ * This is a minimal reimplementation of the following uBlock Origin rule:
+ * https://github.com/uBlockOrigin/uAssets/blob/3497eebd440f4871830b9b45af0afc406c6eb593/filters/filters.txt#L116
+ *
+ * This in turn calls the following snippet:
+ * https://github.com/gorhill/uBlock/blob/bfdc81e9e400f7b78b2abc97576c3d7bf3a11a0b/assets/resources/scriptlets.js#L365-L470
+ *
+ * Seems like for now dropping just the adPlacements is enough for YouTube TV
+ */
+const origParse = JSON.parse;
+JSON.parse = function () {
+  const r = origParse.apply(this, arguments);
+  if (r.adPlacements) {
+    r.adPlacements = [];
+  }
+  return r;
 };