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VM detector

Detector for scripts on Violentmonkey.

目前为 2017-06-07 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name VM detector
  3. // @namespace https://violentmonkey.github.io
  4. // @description Detector for scripts on Violentmonkey.
  5. // @version 1.0
  6. // @author Gerald <i@gerald.top>
  7. // @match https://greasyfork.org/*
  8. // @grant none
  9. // ==/UserScript==
  10.  
  11. !function () {
  12.   const warn = message => {
  13.     console.warn('[VM detector]', message);
  14.   };
  15.   if (GM_info.scriptHandler !== 'Violentmonkey') {
  16.     warn('This script only works for Violentmonkey.');
  17.     return;
  18.   }
  19.   if (!external.Violentmonkey) {
  20.     warn('This script requires Violentmonkey 2.6.4+.');
  21.     return;
  22.   }
  23.  
  24.   const $ = selector => document.querySelector(selector);
  25.   const button = $('.install-link');
  26.   if (!button) return;
  27.  
  28.   const name = button.dataset.scriptName;
  29.   const namespace = button.dataset.scriptNamespace;
  30.   const version = button.dataset.scriptVersion;
  31.   external.Violentmonkey.isInstalled(name, namespace)
  32.   .then(result => {
  33.     if (result) {
  34.       const compare = compareVersions(result, version);
  35.       if (compare < 0) {
  36.         button.textContent = button.dataset.updateLabel;
  37.       } else if (compare > 0) {
  38.         button.textContent = button.dataset.downgradeLabel;
  39.       } else {
  40.         button.textContent = button.dataset.reinstallLabel;
  41.       }
  42.     }
  43.   });
  44. }();
  45.  
  46. function compareVersions(a, b) {
  47.   const va = a.split('.').map(i => +i);
  48.   const vb = b.split('.').map(i => +i);
  49.   for (let i = 0; i < va.length || i < vb.length; i++) {
  50.     const ua = va[i];
  51.     const ub = vb[i];
  52.     if ((ua || ub) && (ua !== ub)) {
  53.       return ua && (!ub || ua > ub) ? 1 : -1;
  54.     }
  55.   }
  56.   return 0;
  57. }