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USACO Language Selector

Automatically selects language to submit based on file extension

  1. // ==UserScript==
  2. // @name         USACO Language Selector
  3. // @version      1.0
  4. // @description  Automatically selects language to submit based on file extension
  5. // @match        *usaco.org/index.php?page=viewproblem2&cpid=*
  6. // @namespace https://greasyfork.org/users/731318
  7. // ==/UserScript==
  8.  
  9. const fileExtensionToLanguage = {
  10.     c: 0, //C
  11.     cpp: 2, //C++11
  12.     java: 3, //Java
  13.     pas: 4, //Pascal
  14.     py: 6, //Python 3.4.0
  15. }
  16.  
  17. const languageSelector = document.getElementsByName("language")[0]
  18. const fileSelector = document.getElementsByName("sourcefile")[0]
  19.  
  20. fileSelector.onchange = function () {
  21.     const files = fileSelector.files
  22.     if (files.length > 0) {
  23.         const file = files[0]
  24.         const name = file.name
  25.         const extension = name.substr(name.lastIndexOf(".") + 1)
  26.         if (extension.toLowerCase() in fileExtensionToLanguage) {
  27.             languageSelector.selectedIndex = fileExtensionToLanguage[extension]
  28.         }
  29.     }
  30. }