User:Dschwen/coordupdate.js

var coordupdate =
{
 config : {
  coordurls : new Array ( 
                'http://tools.wikimedia.de/~magnus/geo/geohack.php?',
                'http://www8.brinkster.com/erikbaas/wiki/maps.asp?',
                'http://www.nsesoftware.nl/wiki/maps.asp?' 
              )
 },

 // Check against coordinate urls
 isMaplink : function( url )
 {
  if( typeof(url) != 'string' ) return false;

  with(coordupdate)
  {
   for( var key in config.coordurls ) {
    if( url.substr(0,config.coordurls[key].length) == config.coordurls[key] )
     return true;
   }
  }
  
  return false;
 },

 transmit : function( title, data )
 {
  var myIframe = document.createElement('iframe');
  myIframe.style.visibility = 'hidden';

  document.getElementById('content').appendChild(myIframe);

  myIframe.src = 
   'http://tools.wikimedia.de/~dschwen/wikiminiatlas/receive_update.php?title=' +
   escape(title) + '&data=' + escape(data) + '&user=' + escape(mw.config.get('wgUserName'));
 },

 install : function()
 {
  var edittag_name = 'cue_' + mw.config.get('wgPageName');
  var expiry;

  if(document.getElementById('editform') != null)
  {
   //
   // Tag article as being edited
   //
   expiry = new Date();
   expiry.setTime( expiry.getTime() + (5 * 60 * 1000) ); // +5min
   document.cookie = edittag_name + '=1; path=/; expires=' + expiry.toGMTString();
  }

  if( ( mw.config.get('wgCanonicalNamespace') == '' || mw.config.get('wgNamespaceNumber') == 6 ) 
      && mw.config.get('wgIsArticle') )
  {
   var coord_index;
   var cookie_data = '';
   var cookie_name = 'cu_' + mw.config.get('wgPageName');
   var wasEdited = false;

   //
   // Gather current coordinate Data
   //
   var links = document.getElementsByTagName('A');
   for ( key in links ) {
    if( coordupdate.isMaplink( links[key].href ) )
    {
     coord_index = links[key].href.indexOf('params=');
     if(coord_index>-1) {
      cookie_data += links[key].href.substr(coord_index+7) + '|';
     }
    }
   }

   //
   // Recover matching Cookie
   //
   var cookies = document.cookie.split("; ");
   var cookie_read = '';
   for( key in cookies )
   {
    if( cookies[key].substr(0,edittag_name.length+2) == 
        ( edittag_name + '=1' ) ) wasEdited = true;

    if( cookies[key].substr(0,cookie_name.length+1) == 
        ( cookie_name + '=' ) )
    {
     cookie_read = cookies[key].substr(cookie_name.length+1);
     break;
    }
   }
/*
   if( ( cookie_read != cookie_data && cookie_read != '' ) ||
       ( cookie_read != cookie_data && cookie_read == '' && wasEdited ) ) 
    coordupdate.transmit( mw.config.get('wgTitle'), cookie_data );
*/
   if( cookie_read != cookie_data && 
       ( cookie_read != '' || ( cookie_read == '' && wasEdited ) ) ) 
    coordupdate.transmit( mw.config.get('wgTitle'), cookie_data );

   //
   // Expire Edit Tag and possibly unset coordinate cookie
   //
   expiry = new Date();
   expiry.setTime( expiry.getTime() -1 ); // unset cookie
   document.cookie = edittag_name + '=0; path=/; expires=' + expiry.toGMTString();
   if( cookie_data == '' ) 
    document.cookie = cookie_name + '=""; expires=' + expiry.toGMTString();

   //
   // Set current Data as Cookie
   //
   expiry = new Date();
   expiry.setTime( expiry.getTime() + (5 * 60 * 1000) ); // +5min
   if( cookie_data != '' ) 
    document.cookie = cookie_name + '=' + cookie_data + 
                      '; expires=' + expiry.toGMTString();

  }
 }
}

//
// Hook up installation function
//
$(coordupdate.install);