/*********
* Javascript for file upload demo
* Copyright (C) Tomas Larsson 2006
* http://tomas.epineer.se/

* Licence:
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
* 
* Software distributed under this License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*/

    var uploads_in_progress = 0;
   var popped = false;
    function beginAsyncUpload(ul,sid) {         
      ul.form.submit();
//	 document.getElementById('submitUpload').disabled=true;
        uploads_in_progress = uploads_in_progress + 1;
        var pb = document.getElementById(ul.name + "_progress");
        var pi = document.getElementById(ul.name + "_image");
        pb.parentNode.style.display='block';
        new ProgressTracker(sid,{
                progressBar: pb,
		progressImage: pi,
                onComplete: function() {
                        var inp_id = pb.id.replace("_progress","");
                        uploads_in_progress = uploads_in_progress - 1;
                        var inp = document.getElementById(inp_id);
                        if(inp) {
                                inp.value = sid;
                        }
                        pb.parentNode.style.background='none';
			if (uploads_in_progress==0) {
			 //  document.getElementById('submitUpload').disabled=false;
			}

                },
                onFailure: function(msg) {
                        pb.parentNode.style.display='none';
                        alert(msg);
                        uploads_in_progress = uploads_in_progress - 1;
                }
        });
    }

    function submitUploadWait(form, hrf) {
      var redirected = false;
      if (valid.validate()) {
	    popped=false;
	    if (popped==false) {
	       popped=true;
	       var page = getPageDimensions();
	       $('waitDiv').firstChild.style.left = page.offsetX + 'px';
	       $('waitDiv').firstChild.style.top = Math.round(page.offsetY + (page.innerHeight / 10)) + 'px';
	       $('waitDiv').style.display="block";
	       //form.submit();
	       //return true;

	    }
/*	    if (eval(top.frames['target_upload'].document.getElementById('status'))){
	       if (top.frames['target_upload'].document.getElementById('status').innerHTML == 'done') { 
		  window.location=hrf;
		  redirected=true;
	       } 
	    } */
	    if (!redirected) {
	    setTimeout( function() {
		submitUploadWait(form,hrf);
	       }
	       ,500);
	    }
      }
	return true;
    }
function pausecomp(millis)
{
var date = new Date();
var curDate = null;

do { curDate = new Date(); }
while(curDate-date < millis);
} 


function PeriodicalAjax(url, parameters, frequency, decay, onSuccess, onFailure) {
	function createRequestObject() {
		var xhr;
		try {
			xhr = new XMLHttpRequest();
		}
		catch (e) {
			xhr = new ActiveXObject("Microsoft.XMLHTTP");
		}
		return xhr;
	}
	
	function send() {
		if(!stopped) {
			xhr.open('post', url, true);
			xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
			xhr.onreadystatechange = function() { self.onComplete(); };
			xhr.send(parameters);
		}
	}
	
	this.stop = function() {
		stopped = true;
		clearTimeout(this.timer);
	}
	
	this.start = function() {
		stopped = false;
		this.onTimerEvent();
	}
	
	this.onComplete = function() {
		if(this.stopped) return false;
		if ( xhr.readyState == 4) {
			if(xhr.status == 200) {
				if(xhr.responseText == lastResponse) {
					decay = decay * originalDecay;
				} else {
					decay = 1;
				}
				lastResponse = xhr.responseText;
				if(onSuccess instanceof Function) {
					onSuccess(xhr);
				}
				this.timer = setTimeout(function() { self.onTimerEvent(); }, decay * frequency * 1000);
			} else {
				if(onFailure instanceof Function) {
					onFailure(xhr);
				}
			}
		}
	}
	
	this.getResponse = function() {
		if(xhr.responseText) {
			return xhr.responseText;
		}
	}
	
	this.onTimerEvent = function() {
		send();
	}
	
	var self = this;
	var stopped = false;
	var originalDecay = decay || 1.2;
	decay = originalDecay;
	var xhr = createRequestObject();
	var lastResponse = "";
	this.start();
}

function ProgressTracker(sid, options) {

	this.onSuccess = function(xhr) {
		if(parseInt(xhr.responseText)>=100) {
			periodicalAjax.stop();
			if(options.onComplete instanceof Function) {
				options.onComplete();
			}
			options.progressBar.style.display="none";
			options.progressImage.innerHTML = '<img src="/images/catalog/tmp/small/'+sid+'" width="100">';
	       }
	        else if (xhr.responseText == 'error') {
			options.progressBar.innerHTML = _('Error converting your file, is it a .jpg image file?');
			periodicalAjax.stop();

		} else if(xhr.responseText && xhr.responseText != lastResponse) {
			if(options.onProgressChange instanceof Function) {
				options.onProgressChange(xhr.responseText);
			}
			if(options.progressBar && options.progressBar.style) {
				options.progressImage.innerHTML = '';
				options.progressBar.style.width = parseInt(xhr.responseText) + "%";
			}
		}
	}
	
	this.onFailure = function(xhr) {
		if(options.onFailure instanceof Function) {
			options.onFailure(xhr.responseText);
		} else {
			alert(xhr.responseText);
		}
		periodicalAjax.stop();
	}

	var self = this;
	var lastResponse = -1;
	options = options || {};
	var url = options.url || 'fileprogress.php';
	var frequency = options.frequency || 0.5;
	var decay = options.decay || 2;
	var periodicalAjax = new PeriodicalAjax(url, 'sid=' + sid, frequency, decay, function(request){self.onSuccess(request);},function(request){self.onFailure(request);});
}