Easier irccloud channel switching

irccloud_quickswitcher.js

/**
 * The purpose of this script is to allow quick traversing between channels using the keyboard
 * For Example, after injecting this script, go to any channel text box and type: 
 * //<server>#<channel> <optional-text>
 * or as below: 
 * //freenode#javascript hey i have a js question
 * It will auto-switch to freenode's #javascript channel and enter that in the text box
 * Copyright (C) relipse
 * License: Use it however, just don't sell it or say it was you who coded it (Rev 21:8)
 */
 
glbRelipseInjectedScriptDetector = function(){
  function grab_connected_servers(filter){
    filter = filter || false;
    var servers = [];
    $('.connection.connected h2.buffer.active > a.buffer').each(function(){
        if (filter && this.href.indexOf(filter) !== -1){
          servers.push(this.href);
        }
    });
    return servers;
  }
  
  function parsehash(hash){
      hash = hash || window.location.hash;
      console.log(hash);
      var match = /#!\/(ircs:\/\/)?([^\s]+)?\/([^\s]+)?/img.exec(hash);
      if (match !== null){
          console.log(match);
          var res = {};
          res.server = match[2];
          res.channel = match[3];
          return res;
      }
      return false;
  }
  
  function makehash(network, channel){
      if (!network){
          var curhash = parsehash();
          network = curhash.server;
      }
      if (!network){ return false; }
      
      var prefix = '#!/';
      if (network.indexOf('#!/') === 0){
         prefix = '';
      }
      //prefix with '#' automatically
      channel = '%23' + channel;
      
      return prefix+network+'/'+channel;
  }
  
  function detect_channel_switch(txt){
      var match = /\/\/(.*?)#([^\s]+)( .*)?/.exec(txt);
      if (match === null){ return false; }
      match[1] = match[1] || '';
      match[2] = match[2] || '';
      match[3] = match[3] || '';
      var res = {shortserver: match[1], channel:match[2], text:match[3].trim()}
      var possible_servers = grab_connected_servers(res.shortserver);
      res.possible_servers = possible_servers;
      if (!possible_servers || possible_servers.length === 0){
          res.error_code = -1;
          res.error = 'no servers found';
          return res;
      }
      if (possible_servers.length > 1){
          res.error_code = -2;
          res.error = 'multiple servers found, ambiguous';
      }
      res.found_server = possible_servers[0];
      res.server = res.found_server;
      return res;
  }
  //thanks http://bresleveloper.blogspot.co.il/2013/03/jsjq-simulate-enter-event.html
  function simulate_enter($textbox){
       //now automatically trigger an enter-keypress to send text
       var press = jQuery.Event("keypress");
       press.bubbles = true;
       press.cancelable = true;
       press.charCode = 13;
       press.currentTarget = $textbox[0];
       press.eventPhase = 2;
       press.keyCode = 13;
       press.returnValue = true;
       press.srcElement = $textbox[0];
       press.target = $textbox[0];
       press.type = "keypress";
       press.view = Window;
       press.which = 13;
       $textbox.trigger(press);
   
  }
  
  function detect_preprocess_code(txt){
       if (txt.indexOf('//') !== -1){
           var channel_switch = detect_channel_switch(txt);
           console.log(channel_switch);
           if (channel_switch.error_code){
               alert(channel_switch.error);
               return false;
           }
           var nwhash = makehash(channel_switch.server, channel_switch.channel);
           if (nwhash){
              //alert(nwhash);
              window.location.hash = nwhash;
              if (channel_switch.text){
                 setTimeout(function(){
                     var $textbox = $('td.inputcell textarea');
                     $textbox.val(channel_switch.text);
                     simulate_enter($textbox);
                 },150);
              }
           }
           return true;
       } 
       return false; //preprocess not detected
  }
  
  glbRelipseDetectPreProcess = function(txt){ detect_preprocess_code(txt); if (txt.indexOf('//') === 0){ return true; } };
  
  $('.inputcell .input textarea').bind('keydown', function(e) { 
     var code = e.keyCode || e.which;
     if(code == 13) { 
         if (glbRelipseDetectPreProcess(this.value)){
             e.preventDefault();
             this.value = '';
         }
     }
     return true;
  });


};

$(function(){
   //every time user changes channels we need to reload this script
   $(window).on('hashchange', function() {
     glbRelipseInjectedScriptDetector();
   });
   glbRelipseInjectedScriptDetector();
});

/**dynamically inject this onto irccloud page like this: 
   (function(src){ 
      var s = document.createElement("script"); 
      s.src = src; 
      $("head").append(s);
      return s;
   })('http://path/to/file.js');
*/