/**
 * DNS缓存杀手
 * @author yutent<yutent.io@gmail.com>
 * @date 2020/11/04 17:54:49
 */

chrome.action.onClicked.addListener(function (ctab) {
  var cid = ctab.id
  var tid = null

  var callback = function () {
    chrome.tabs.remove(tid)
    chrome.scripting.executeScript({
      target: { tabId: cid },
      files: ['done.js']
    })
  }

  chrome.tabs.query({}, function (tabs) {
    var done = false
    for (let i = 0, tab; (tab = tabs[i++]); ) {
      if (/^chrome:\/\/net-internals/.test(tab.url)) {
        tid = tab.id
        chrome.scripting.executeScript(
          { target: { tabId: tab.id }, files: ['clean.js'] },
          callback
        )
        done = true
        break
      }
    }
    if (!done) {
      chrome.tabs.create(
        { url: 'chrome://net-internals/#dns', active: false },
        function (tab) {
          tid = tab.id
          chrome.scripting.executeScript(
            { target: { tabId: tab.id }, files: ['clean.js'] },
            callback
          )
        }
      )
    }
  })
})