mirror-chatterino2/browser_ext/background.js

const ignoredPages = {
  "settings": true,
  "payments": true,
  "inventory": true,
  "messages": true,
  "subscriptions": true,
  "friends": true,
  "directory": true,
};

const appName = "com.chatterino.chatterino";

let port;

function matchUrl(url) {
  if (!url)
    return;

  const match = url.match(/^https?:\/\/(www\.)?twitch.tv\/([a-zA-Z0-9]+)\/?$/);

  if (match) {
    const channelName = match[2];

    if (!ignoredPages[channelName]) {
      selectChannel(channelName);
    }
  }
}

function connectPort() {
  let port = chrome.runtime.connectNative("com.chatterino.chatterino");

  port.onMessage.addListener(function(msg) {
    console.log(msg);
  });
  port.onDisconnect.addListener(function() {
    console.log("Disconnected");
  });
}

function selectChannel(channelName) {
  console.log(channelName);

  port.postMessage({channelName: channelName});
}

/// add listeners
chrome.tabs.onActivated.addListener((activeInfo) => {
  chrome.tabs.get(activeInfo.tabId, (tab) => {
    if (!tab)
      return;

    if (!tab.url)
      return;

    matchUrl(tab.url);
  });
});

chrome.tabs.onUpdated.addListener((tabId, changeInfo, tab) => {
  if (!tab.highlighted)
    return;

  matchUrl(changeInfo.url);
});