async moveTabsToWindow()

in src/js/background/backgroundLogic.js [247:318]
52 lines of code
10 McCabe index (conditional complexity)

  async moveTabsToWindow(options) {
    const requiredArguments = ["cookieStoreId", "windowId"];
    this.checkArgs(requiredArguments, options, "moveTabsToWindow");
    const { cookieStoreId, windowId } = options;

    const list = await browser.tabs.query({
      cookieStoreId,
      windowId
    });

    const containerState = await identityState.storageArea.get(cookieStoreId);

    // Nothing to do
    if (list.length === 0 &&
        containerState.hiddenTabs.length === 0) {
      return;
    }
    let newWindowObj;
    let hiddenDefaultTabToClose;
    if (list.length) {
      newWindowObj = await browser.windows.create();

      // Pin the default tab in the new window so existing pinned tabs can be moved after it.
      // From the docs (https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/tabs/move):
      //   Note that you can't move pinned tabs to a position after any unpinned tabs in a window, or move any unpinned tabs to a position before any pinned tabs.
      await browser.tabs.update(newWindowObj.tabs[0].id, { pinned: true });

      browser.tabs.move(list.map((tab) => tab.id), {
        windowId: newWindowObj.id,
        index: -1
      });
    } else {
      // As we get a blank tab here we will need to await the tabs creation
      newWindowObj = await browser.windows.create({
      });
      hiddenDefaultTabToClose = true;
    }

    const showHiddenPromises = [];

    // Let's show the hidden tabs.
    if (!this.unhideQueue.includes(cookieStoreId)) {
      this.unhideQueue.push(cookieStoreId);
      for (let object of containerState.hiddenTabs) { // eslint-disable-line prefer-const
        showHiddenPromises.push(browser.tabs.create({
          url: object.url || DEFAULT_TAB,
          windowId: newWindowObj.id,
          cookieStoreId
        }));
      }
    }

    if (hiddenDefaultTabToClose) {
      // Lets wait for hidden tabs to show before closing the others
      await showHiddenPromises;
    }

    containerState.hiddenTabs = [];

    // Let's close all the normal tab in the new window. In theory it
    // should be only the first tab, but maybe there are addons doing
    // crazy stuff.
    const tabs = await browser.tabs.query({windowId: newWindowObj.id});
    for (let tab of tabs) { // eslint-disable-line prefer-const
      if (tab.cookieStoreId !== cookieStoreId) {
        browser.tabs.remove(tab.id);
      }
    }
    const rv = await identityState.storageArea.set(cookieStoreId, containerState);
    this.unhideQueue.splice(this.unhideQueue.indexOf(cookieStoreId), 1);
    return rv;
  },