feat: Add VOD download functionality

manifest.json

@@ -9,14 +9,19 @@
     "web_accessible_resources": [
         {
             "resources": [
+                "src/amazon-ivs-worker.min.js",
                 "src/app.js",
-                "src/chrome/app.js"
+                "src/chrome/app.js",
+                "src/download.js"
             ],
             "matches": [
                 "https://*.twitch.tv/*"
             ]
         }
     ],
+    "background": {
+        "service_worker": "src/background.js"
+    },
     "content_scripts": [
         {
             "matches": [
@@ -34,5 +39,11 @@
         "https://*.twitch.tv/*",
         "https://static.twitchcdn.net/assets/*"
     ],
-    "permissions": []
+    "permissions": [
+        "activeTab",
+        "tabs",
+        "webRequest",
+        "webNavigation",
+        "declarativeNetRequest"
+    ]
 }

src/app.js

@@ -1,25 +1,32 @@
-// From vaft script (https://github.com/pixeltris/TwitchAdSolutions/blob/master/vaft/vaft.user.js#L299)
-function getWasmWorkerJs(twitchBlobUrl) {
-    var req = new XMLHttpRequest();
-    req.open('GET', twitchBlobUrl, false);
-    req.overrideMimeType("text/javascript");
-    req.send();
-    return req.responseText;
-}
+var isVariantA = false;
+const originalAppendChild = document.head.appendChild;
+
+document.head.appendChild = function (element) {
+    if (element.tagName === "SCRIPT") {
+        if (element.src.includes("player-core-variant-a")) {
+            isVariantA = true;
+        }
+    }
+
+    return originalAppendChild.call(this, element);
+};
 
 const oldWorker = window.Worker;
 
 window.Worker = class Worker extends oldWorker {
     constructor(twitchBlobUrl) {
-        var workerString = getWasmWorkerJs(`${twitchBlobUrl.replaceAll("'", "%27")}`);
+        super(twitchBlobUrl);
+
+        this.addEventListener("message", (event) => {
+            const data = event.data;
+
+            if ((data.id == 1 || isVariantA) && data.type == 1) {
+                const newData = event.data;
 
-        const blobUrl = URL.createObjectURL(new Blob([`
-            importScripts(
-                '${patch_url}',
-            );
-            ${workerString}
-        `]));
+                newData.arg = [data.arg];
 
-        super(blobUrl);
+                this.postMessage(newData);
+            }
+        });
     }
 }

src/background.js

@@ -0,0 +1,82 @@
+
+chrome.webNavigation.onBeforeNavigate.addListener(function () {
+
+}, {
+    url: [{ hostContains: "twitch" }]
+});
+
+var isChrome = chrome.declarativeNetRequest != undefined;
+var cdnLink = '';
+
+if (isChrome) {
+
+    chrome.runtime.onStartup.addListener(() => {
+        chrome.runtime.reload();
+    });
+}
+
+
+const app = () => {
+    if (isChrome) {
+
+        chrome.declarativeNetRequest.updateDynamicRules({
+            addRules: [{
+                'id': 1001,
+                'priority': 1,
+                'action': {
+                    'type': 'redirect',
+                    'redirect': { url: cdnLink }
+                },
+                'condition': { urlFilter: 'https://static.twitchcdn.net/assets/amazon-ivs-wasmworker.min-*.js' }
+            }],
+            removeRuleIds: [1001]
+        });
+
+        chrome.declarativeNetRequest.updateDynamicRules({
+            addRules: [{
+                'id': 1002,
+                'priority': 1,
+                'action': {
+                    'type': 'redirect',
+                    'redirect': { url: cdnLink }
+                },
+                'condition': { urlFilter: 'https://assets.twitch.tv/assets/amazon-ivs-wasmworker.min-*.js' }
+            }],
+            removeRuleIds: [1002]
+        });
+    } else {
+
+        browser.webRequest.onBeforeRequest.addListener(() => {
+            return { redirectUrl: cdnLink };
+        }, {
+            urls: [
+                "https://static.twitchcdn.net/assets/amazon-ivs-wasmworker.min-*.js",
+                "https://assets.twitch.tv/assets/amazon-ivs-wasmworker.min-*.js"
+            ],
+            types: ["main_frame", "script"]
+        }, ["blocking"]);
+    }
+
+};
+
+(async () => {
+
+    try {
+        const response = await fetch("https://api.github.com/repos/besuper/TwitchNoSub/commits");
+        const content = await response.json();
+
+        var latestCommit = content[0].sha;
+
+        console.log("Lastest commit sha: " + latestCommit);
+
+        cdnLink = `https://cdn.jsdelivr.net/gh/besuper/TwitchNoSub@${latestCommit}/src/amazon-ivs-worker.min.js`;
+    } catch (e) {
+        console.log(e);
+
+        cdnLink = `https://cdn.jsdelivr.net/gh/besuper/TwitchNoSub/src/amazon-ivs-worker.min.js`;
+    }
+
+    console.log("CDN link : " + cdnLink);
+
+    app();
+})();