Initial commit

LICENSE

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+Copyright (c) 2021 Fernando França
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+Mute Google Meet
+================
+
+Chrome extension for muting/unmuting Google Meet from any tab.
+

background.js

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+// Iterate through Google Meet tabs, fetch status
+async function updateStatus() {
+  var activeCount = 0;
+  var muted = false;
+  var activeTab = null
+  var tabs = await chrome.tabs.query({ url: "https://meet.google.com/*" });
+
+  // Use getTabStatus script for each Google Meet tab
+  const meetTabStatuses = tabs.map(async function (tab) {
+    let injectionResults = await chrome.scripting.executeScript({
+      target: { tabId: tab.id },
+      files: ['getTabStatus.js'],
+    });
+    if (injectionResults[0].result[0]) {
+      activeCount++;
+      activeTab = tab;
+      muted = injectionResults[0].result[1];
+    }
+  });
+  await Promise.all(meetTabStatuses);
+
+  // Should display status only if a single Google Meet instance is active
+  if (activeCount == 1) {
+    badgeText = "";
+    badgeTitle = muted ? "unmute Google Meet" : "mute Google Meet";
+    badgeIcon = muted ? "icon128_muted.png" : "icon128_active.png";
+    activeTab = activeTab;
+  }
+  else {
+    badgeText = (activeCount >= 2) ? "Error" : "";
+    badgeTitle = (activeCount >= 2) ? "Multiple active Google Meet tabs" : "No active Google Meet tabs";
+    badgeIcon = "icon128.png";
+  }
+
+  chrome.action.setBadgeText({ text: badgeText });
+  chrome.action.setTitle({ title: badgeTitle })
+  chrome.action.setIcon({ path: "images/" + badgeIcon })
+
+  return (activeCount == 1) ? activeTab.id : null;
+}
+
+// Inject keypress for toggling mute in active Google Meet tab
+async function sendKeypress(tab) {
+  var activeTabID = await updateStatus();
+  if (activeTabID != null) {
+    await chrome.scripting.executeScript(
+      {
+        target: { tabId: activeTabID },
+        files: ['dispatchKey.js'],
+      }
+    );
+  }
+}
+
+// Extension icon clicked
+chrome.action.onClicked.addListener(async function (tab) {
+  await sendKeypress();
+  updateStatus();
+});
+
+// Runs after a tab has been loaded or its audible state changed
+chrome.tabs.onUpdated.addListener(function (tabId, changeInfo, tab) {
+  if (changeInfo.status == "complete" || changeInfo.hasOwnProperty("audible")) {
+    updateStatus();
+  }
+});
+
+// Any tab has been removed
+chrome.tabs.onRemoved.addListener(function (tabId, removeInfo) {
+  updateStatus();
+});
+
+// Prevent showing incorrect state on page suspend
+chrome.runtime.onSuspend.addListener(function () {
+  chrome.action.setIcon({ path: "images/icon128.png" });
+  chrome.action.setBadgeText({ text: "" });
+})
+
+// Update status on load
+updateStatus();

dispatchKey.js

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+// Dispatch Cmd + D (metaKey) for Mac OS or Ctrl + D (ctrlKey) otherwise
+var macOS = (navigator.userAgent.indexOf("Mac") != -1);
+
+document.dispatchEvent(
+  new KeyboardEvent("keydown", {
+    metaKey: macOS,
+    ctrlKey: !macOS,
+    bubbles: true,
+    cancelable: true,
+    keyCode: 68,
+    code: "KeyD"
+  })
+);

getTabStatus.js

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+// Verify if this meeting is active and the status of the mute button
+var active = false;
+var muted = false;
+
+var buttons = document.getElementsByTagName("button");
+for (var elem of buttons) {
+  if (elem.hasAttribute("data-is-muted")) {
+    active = true;
+    if (elem.getAttribute("data-is-muted") === "true") {
+      muted = true;
+    }
+    // Note: video button also has data-is-muted attribute
+    break;
+  }
+}
+
+[active, muted]

manifest.json

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+{
+    "manifest_version": 3,
+    "name": "Mute Google Meet",
+    "description": "Mutes Google Meet from any tab.",
+    "version": "1.0",
+    "author": "Fernando França",
+    "icons": {
+        "16": "images/icon16.png",
+        "48": "images/icon48.png",
+        "128": "images/icon128.png"
+    },
+    "background": {
+        "service_worker": "background.js"
+    },
+    "action": {
+        "default_title": "Mute Google Meet"
+    },
+    "permissions": [
+        "scripting",
+        "tabs"
+    ],
+    "host_permissions": [
+        "https://meet.google.com/"
+    ]
+}