userscript: support relaunches

src/index.js

@@ -1,32 +1,7 @@
-const CONTENT_TARGET_LAUNCH_PARAMETER = "contentTarget";
-const YOUTUBE_TV_URL = "https://www.youtube.com/tv";
-
-function extractLaunchUrlParams(launchParameters) {
-    if (launchParameters === null || launchParameters === "") {
-        return null;
-    }
-    const launchParamJson = JSON.parse(launchParameters);
-    return launchParamJson[CONTENT_TARGET_LAUNCH_PARAMETER];
-}
-
-function concatenateUrlAndGetParams(ytUrl, path) {
-    if (!path) {
-        return ytUrl;
-    } else {
-        return ytUrl + "#?" + path;
-    }
-}
+import {extractLaunchParams, handleLaunch} from './utils';
 
 function main() {
-    const launchParameters = window.PalmSystem
-      ? window.PalmSystem.launchParams
-      : window.launchParams;
-    const youtubeLaunchUrlPath = extractLaunchUrlParams(launchParameters);
-    if (typeof youtubeLaunchUrlPath === 'string' && youtubeLaunchUrlPath.indexOf('https://www.youtube.com/tv?') === 0) {
-      window.location = youtubeLaunchUrlPath;
-    } else {
-      window.location = concatenateUrlAndGetParams(YOUTUBE_TV_URL, youtubeLaunchUrlPath);
-    }
+  handleLaunch(extractLaunchParams());
 }
 
 

src/userScript.js

@@ -3,6 +3,13 @@ import 'core-js/stable';
 import 'regenerator-runtime/runtime';
 import './domrect-polyfill';
 
+import {handleLaunch} from './utils';
+
+document.addEventListener('webOSRelaunch', (evt) => {
+  console.info('RELAUNCH:', evt, window.launchParams);
+  handleLaunch(evt.detail);
+}, true);
+
 import './adblock.js';
 import './sponsorblock.js';
 import './ui.js';

src/utils.js

@@ -0,0 +1,24 @@
+export function extractLaunchParams() {
+  if (window.launchParams) {
+    return JSON.parse(window.launchParams);
+  } else {
+    return {};
+  }
+}
+
+export function handleLaunch(params) {
+  const { contentTarget } = params;
+
+  if (contentTarget && typeof contentTarget === 'string') {
+    if (contentTarget.indexOf('https://www.youtube.com/tv?') === 0) {
+      console.info('Launching from direct contentTarget:', contentTarget);
+      window.location = contentTarget;
+    } else {
+      console.info('Launching from partial contentTarget:', contentTarget);
+      window.location = 'https://www.youtube.com/tv#?' + contentTarget;
+    }
+  } else {
+    console.info('Default launch');
+    window.location = 'https://www.youtube.com/tv';
+  }
+}