// ==UserScript==
// @name        V2rayA - Add country flag to Ip or domain
// @namespace   Violentmonkey Scripts
// @description This script will convert ip or domain of "Server Address" column on V2rayA's web interface
// @version     0.1
// @author      thelostthing
// @license     MIT
// 
// @match       http://localhost:2017/
// @match       http://127.0.0.1:2017/
// 
// @grant       GM_xmlhttpRequest
// @require     https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js
// 
// @downloadURL none
// ==/UserScript==

const ipFlag = () => {
  $('section.tab-content > .tab-item:not([style*="display: none"]) td[data-label="Server Address"]:not(.flagged)').each(function(index, element) {
    const domain_ip = $(element).html().split(':')[0].trim();
    
    GM_xmlhttpRequest({
      method: "GET",
      url: 'https://json.geoiplookup.io/'+domain_ip,
      onload: function(response) {
        if(response.status == 200 && !$(element).hasClass('flagged')) {
          const country_code = JSON.parse(response.responseText).country_code.toLowerCase();
          $(element).prepend('<img src="https://cdn.jsdelivr.net/npm/round-flag-icons/flags/'+country_code+'.svg" width="18">');
          $(element).addClass('flagged');
        }
      }
    });
    
  })
}

const checkContent = (target) => new Promise((resolve, reject) => {
  new MutationObserver((mutations, self) => {
    for( let mutation of mutations) {
      if( !mutation.target.hidden && mutation.target.classList.contains('tab-item')) {
        self.disconnect();
        resolve();
      }
    }
  }).observe(target, { subtree: true, attributes: true, attributeOldValue : true, attributeFilter: ['style'] });
});

document.onreadystatechange = function () {
  if (document.readyState === 'complete') {
    ipFlag(); // for default server page
  
    $('.main-tabs > nav.tabs > ul > li').click(async () => {
      await checkContent(document.querySelector('.tab-content'));
      ipFlag();
    });
  }
}