/************************************************************
upload_form.js - Function to implement JSON requested AJAX upload.
Copyright (C) 2006  Jeremy Nicoll

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

Please see lgpl.txt for a copy of the license - this notice and the file 
lgpl.txt must accompany this code.

Please go to www.SeeMySites.net/forum for questions and support.
***************************************************************/

// Remplace toutes les occurences d'une chaine
function replaceAll(str, search, repl) {
while (str.indexOf(search) != -1)
str = str.replace(search, repl);
return str;
}

// Remplace les caractères accentués
function AccentToNoAccent(str) {
var norm = new Array('À','Á','Â','Ã','Ä','Å','Æ','Ç','È','É','Ê','Ë','Ì','Í','Î','Ï', 'Ð','Ñ','Ò','Ó','Ô','Õ','Ö','Ø','Ù','Ú','Û','Ü','Ý','Þ','ß', 'à','á','â','ã','ä','å','æ','ç','è','é','ê','ë','ì','í','î','ï','ð','ñ', 'ò','ó','ô','õ','ö','ø','ù','ú','û','ü','ý','ý','þ','ÿ');
var spec = new Array('A','A','A','A','A','A','A','C','E','E','E','E','I','I','I','I', 'D','N','O','O','O','0','O','O','U','U','U','U','Y','b','s', 'a','a','a','a','a','a','a','c','e','e','e','e','i','i','i','i','d','n', 'o','o','o','o','o','o','u','u','u','u','y','y','b','y');
for (var i = 0; i < spec.length; i++)
str = replaceAll(str, norm[i], spec[i]);
return str;
} 

function NomFichierValide(valeurDuChamp,extention)
{  
   if (valeurDuChamp.length > 0)
    {
	   		 ext = valeurDuChamp.substring(valeurDuChamp.lastIndexOf('.'),valeurDuChamp.length);
           	 ext = ext.toUpperCase();				 
     		 if (extention.indexOf(ext) == -1)
			 {
     		    alert('Vous devez entrer un fichier avec une extension valide (' + extention + ').');
		        return false;				
		     }		  
   			 else
   	   		    return true;
	}
   else
   	   return true;
} 

//This function takes two paramaters: form (the ID of the form), and sid, which 
//differentiates the different uploads from each other.
var ul_vars = {
  interval : 1000, //The time in milleseconds between each status request.
  speeds : []      //Keeps track of the speeds of each upload.
};
function uploadForm(form, sid) {
  var theForm = $(form);
  // The variable request is an object that will contain details of the request.
  var request = {};
  var fileName = '';
  var image = $(form);
  
 
  
    
  // This little bit loops through all the elements in the form, locates the
  // file input field, and extracts the file name of the file being uploaded.
  for (var i=0; i < theForm.elements.length; i++) { 
    ele = theForm.elements[i];
    if (ele.type == 'file') {
      var fileName = ele.value;
    	if (fileName.indexOf('/') > -1) { 
    	  fileName = fileName.substring(fileName.lastIndexOf('/')+1, fileName.length);
      }	else {
    	  fileName = fileName.substring(fileName.lastIndexOf('\\')+1, fileName.length);
      }
      //Since there can only be one file per form for this script, we'll exit the loop here. 
      break;
    }
  }
  if (fileName.replace('/\s/', '').toString() === '') {return;}
  
  //Valider l'extention du fichier
   if (!NomFichierValide(fileName,'.JPG,.PNG,.GIF'))
      {
      return false;  
      }	   
	
  // Traitement du nom de fichier  
  ext      = fileName.substring(fileName.lastIndexOf('.'),fileName.length);
  fileName = fileName.substring(0,fileName.length-ext.length);  
  fileName = sid + AccentToNoAccent(fileName).replace(/\W/g,"-") + ext;
  
  // Image du traitement
  $('' + sid + '_image').src = 'ajax-loader.gif';
  $('' + sid + '_progressBox').style.background  = '#cccccc';
  $('' + sid + '_progressPourcentage').innerHTML = 'Démarrage...';   
  
  theForm.submit();
  var ele;
    
  //These three parts of 'request' are required in order for the filestatus server-side script to work.
  request.sid = sid;
  request.fileName = fileName;
  request.iframe = theForm.target;
  
  
  // I hope this is self explanatory, but if not, this will send a JSON request to filestatus.php
  // every 3 seconds.  RepeatGetAction is in SendRecieve.js or sr_c.js.  If a single call is
  // successful, the successFunc will be called. Otherwise, failFunc will be called.  
   
  repeater = new RepeatGetAction('filestatus.php', request, ul_vars.interval);
  repeater.successFunc = function (getBack) {
    if (getBack.progress >= 100 || getBack.progress=='done') {
      getBack.progress = 100;
	  $(getBack.sid + '_image').src = 'temp_thumb.php?image=' + fileName + '&perm_image=1';	  
      this.stop();
    }
	
	/*
    if (!ul_vars.speeds[getBack.sid]) {ul_vars.speeds[getBack.sid] = [];}
    else if (ul_vars.speeds[getBack.sid].length == 3) {ul_vars.speeds[getBack.sid].shift();}
    
    ul_vars.speeds[getBack.sid].push(getBack.current_size);
    ul_vars.speeds[getBack.sid].sort(function(a, b) {return a - b;});  //Sorts numerically instead of by string. 
    
    var bytes_sec = 0;
    var bytes_append = 'B/sec';
    if (ul_vars.speeds[getBack.sid].length == 3) {
      var dif = ul_vars.speeds[getBack.sid][2]  - ul_vars.speeds[getBack.sid][0];
      bytes_sec = dif / ((ul_vars.interval / 1000) * 3);
      if (bytes_sec > 1024) {
        bytes_sec = bytes_sec / 1024;
        bytes_append = 'KB/sec';
      } 
    }
	*/
    //Due to a stupid IE bug, this has been changed...
    //$(getBack.sid + '_progress').style.width = getBack.progress + '%';
    $(getBack.sid+'_progress').style.width = (getBack.progress / 10)  + 'em';
    $(getBack.sid+'_progress').style.height = '2em';
	
	if (getBack.progress < 100)
      $(getBack.sid+'_progressPourcentage').innerHTML = getBack.progress + "%";
	else
      $(getBack.sid+'_progressPourcentage').innerHTML = "Transfert terminé";	
		
	

    //$(getBack.sid + '_fileName').innerHTML = bytes_sec.toFixed(2) + ' ' + bytes_append;
    $(getBack.sid + '_fileName').innerHTML = fileName.replace(sid,'');
  }; 
  repeater.failFunc = function (getBack) {
    this.stop();
    $(getBack.iframe).src = 'blank.html';
    alert(getBack.error_msg);
  };
  
  // This MUST be called before the action will start.  When the repeater has served its 
  // purpose (or you get sick of it), you can call repeater.stop() to stop it.
  repeater.start();
}