User:Alex 21/script-categoriessort.js

$(function($) {
 mw.loader.using( ['mediawiki.util'] ).then( function () {
  var portletlink = mw.util.addPortletLink('p-tb', '#', 'Sort categories');
  $(portletlink).click( function(e) {
   e.preventDefault();
   // Determine if we need to go to the editing page.
   var loc = window.location.href; 
   if (loc.indexOf('action=edit') < 0 && loc.indexOf('action=submit') < 0) {
    alert("Go to the edit page to use this script.");
   } else {
    // Get textbox value
    var wpTextbox1 = document.getElementById('wpTextbox1');
    var wpTextbox1_V = wpTextbox1.value;
    
    // Categories to check
    var category = "[[Category:";
    var categoryA = category+"A ";
    var categoryThe = category+"The ";
    var categoryEponymous = category+mw.config.get("wgTitle");
    
    // Get the text up to the start of the categories, and then all of the text with the categories.
    var categoriesStart = wpTextbox1_V.indexOf(category);
    var textBeforeCategories = wpTextbox1_V.substr(0, categoriesStart).trim();
    var textWithCategories = wpTextbox1_V.substr(categoriesStart).trim();
    
    // Categories should be on new lines, so split by new line, sort alphabetically with a few checks, then join again with new lines.
    // Checks: eponymous categories are listed first; categories are sorted without preceding "The"
    var splitCategories = textWithCategories.split("\n");
    splitCategories.sort(function(a, b) {
     if (a.substr(0, categoryEponymous.length) == categoryEponymous) return -1e8;
     if (b.substr(0, categoryEponymous.length) == categoryEponymous) return 1e8;
     
     if (a.substr(0, categoryThe.length) == categoryThe) a = a.replace(categoryThe, category);
     if (b.substr(0, categoryThe.length) == categoryThe) b = b.replace(categoryThe, category);
     
     if (a.substr(0, categoryA.length) == categoryA) a = a.replace(categoryA, category);
     if (b.substr(0, categoryA.length) == categoryA) b = b.replace(categoryA, category);
     
     return a.localeCompare(b);
    });
    textWithCategories = splitCategories.join("\n");
    
    // Merge pre-category text back with the sorted and joined category text, place back in textbok and add summary.
    wpTextbox1.value = textBeforeCategories+"\n"+textWithCategories+"\n";
    document.getElementById('wpSummary').value += "Sorted categories alphabetically via [[User:Alex 21/script-categoriessort|script]].";
    document.getElementById('wpMinoredit').checked = true;
   }
  });
 });
});