background.js

var sbId, sbPrevUrl;
// Create the window and save the tab id
browser.runtime.onMessage.addListener(function (request, sender, sendResponse) {
  if (request.type === 'share-backid') {
    browser.windows.create(request.data).then(function (tab) {
      sbId = tab.id;
      sbPrevUrl = request.data.url;
      return tab.id;
    });
  } else if (request.type === 'share-backid-container') {
    browser.tabs.create(request.data).then(function (tab) {
      sbId = tab.id;
      sbPrevUrl = request.data.url;
      return tab.id;
    });
  }
});

// Autoclose the window when the url change
browser.tabs.onUpdated.addListener(function (tabId, changeInfo, tab) {
  if (sbId === tab.windowId) {
    console.log(sbPrevUrl)
    const cssInjectionsFor = [
      'https://www.reddit.com/',
      'shaarli'
    ];

    if (sbPrevUrl !== undefined) {
      // True if any of the listed links show up
      const shallInjectCss = cssInjectionsFor.some(function (urlPart) {
        return sbPrevUrl.includes(urlPart);
      });

      if (shallInjectCss) {
        browser.tabs.insertCSS(tabId, {
          code: 'body { overflow: auto !important; }'
        });
      }
    }

    urlChangeStrategy(tabId, sbPrevUrl);
  }
});

const closeWhen = ['latest_status_id='];

const closeCarefullyWhen = [
  'reddit\.com\/user\/.+\/comments\/.+\/',
  'reddit\.com\/r\/.+\/comments\/.+\/'
];

const closeCarefullyOnlyIf = [
  'https://www.facebook.com/',
  'https://www.linkedin.com/feed/',
  'https://x.com/home'
];

function urlChangeStrategy(tabId, sbPrevUrl) {
  browser.tabs.get(tabId, function (tabinfo) {
    const modalUrl = tabinfo.url;
    console.log(modalUrl)

    if (sbPrevUrl !== modalUrl && modalUrl !== 'about:blank') {
      checkAndCloseTab(tabId, sbPrevUrl, modalUrl);
    }
  });
}

function checkAndCloseTab(tabId, sbPrevUrl, modalUrl) {
  var shallClose = closeWhen.some(function (urlPart) {
    return modalUrl.includes(urlPart);
  });

  if (!shallClose) {
    shallClose = closeCarefullyWhen.some(function (regex) {
      var testUrl = RegExp(regex, 'g');
      return testUrl.test(modalUrl);
    });
  }

  if (!shallClose) {
    shallClose = closeCarefullyOnlyIf.some(function (url) {
      return url == modalUrl;
    });
  }

  if (shallClose) {
    browser.tabs.remove(tabId);
    return;
  }

  browser.storage.local.get('mastodon').then(function (result) {
    var shouldCloseMastodon = false;

    if (result.mastodon && result.mastodon.length > 6) {
      try {
        const mastodonInstanceUrl = new URL(result.mastodon);
        const prevUrl = new URL(sbPrevUrl);
        const currentUrl = new URL(modalUrl);

        if (mastodonInstanceUrl.host === prevUrl.host &&
            prevUrl.pathname.includes('/share') &&
            mastodonInstanceUrl.host === currentUrl.host &&
            /\/@[a-zA-Z0-9._-]+\/\d+/.test(currentUrl.pathname)) {
          shouldCloseMastodon = true;
        }
      } catch (error) {
        console.log('Error parsing Mastodon URLs:', error);
      }
    }

    if (shouldCloseMastodon) {
      browser.tabs.remove(tabId);
    }
  });
}

// call function which get the address bar color (toolbar_field)
setPageActionIcon();

async function setPageActionIcon() {
  var themeInfo = await browser.theme.getCurrent();
  let color = 'light';
  var rgb_list = ['rgb(71, 71, 73)', 'rgb(50, 50, 52)']; // list of RGB where icon_theme should be light
  if (themeInfo.colors && themeInfo.colors.toolbar_field) {
    if (!rgb_list.includes(themeInfo.colors.toolbar_field.toString())) {
      color = 'dark';
    }
  }
  setPageAction(color);
}

function setPageAction(color) {
  var ext_icon = 'icon-' + color + '.svg';
  browser.tabs.onUpdated.addListener(function (tabId, changeInfo, tab) {
    var getting = browser.storage.local.get('pageaction');
    getting.then(
      function (result) {
        var pageaction = result.pageaction;
        if (!pageaction) {
          if (
            tab.url.indexOf('about:') !== 0 &&
            tab.url.indexOf('moz-extension:') !== 0
          ) {
            browser.pageAction.setIcon({
              tabId: tab.id,
              path: ext_icon
            });

            browser.pageAction.setTitle({
              tabId: tab.id,
              title: 'Share'
            });

            browser.pageAction.show(tab.id);
            browser.pageAction.setPopup({
              tabId,
              popup: '/modal/modal.html'
            });
          }
        }
      },
      function (error) {
        console.log(`Error: ${error}`);
      }
    );
  });
}