// Browser specific XmlHttpRequest Object
function getXmlHttpRequestObject()
{
	if( window.XMLHttpRequest )
	{
		return new XMLHttpRequest(); // Not IE
	}
	else if( window.ActiveXObject )
	{
		return new ActiveXObject( "Microsoft.XMLHTTP" ); // IE
	}
	/*else
	{
		alert( "Your browser doesn't support this function, sorry!" );
	}*/
}

var receiveReq = new Array();

// Called on clicking 'search'
function getDirSize( path, deploy )
{
	receiveReq[path] = getXmlHttpRequestObject();

	if( receiveReq[path].readyState == 4 || receiveReq[path].readyState == 0 )
	{
		var url = 'http://fss.powellwilliams.co.uk/xml_dirsize.php?path='+path;
		if( deploy != false )
		{
			url += '&deploy='+deploy;
		}
		receiveReq[path].open("GET", url, true);
		receiveReq[path].onreadystatechange = handleAddr; 
		receiveReq[path].send(null);
	}			
}

// This is incremented with the size of each dir sized by the callback.
var dirSizeSum=0;

// Called on callback.
function handleAddr() {
	// 4 == finished

	for( keyVar in receiveReq )
	{
		if( receiveReq[keyVar] && receiveReq[keyVar].readyState == 4 )
		{
			var doc = receiveReq[keyVar].responseText;
			var data = doc.split( "\n");
	
			if( data.length == 3 )
			{
				var destdiv = document.getElementById( data[0] );
				destdiv.innerHTML = data[1];
				dirSizeSum += parseInt(data[2]);

				var destdiv = document.getElementById( "DeploymentTotalSize" );
				if( destdiv )
				{
					destdiv.innerHTML = size_translate( dirSizeSum );
				}
			}
			else
			{
				alert( 'Error reading size: access denied.' );
			}

			receiveReq[keyVar] = null
		}
	} // for
}


// Allow a structure of file trees to build an array of "Get Size" button paths
// currently displayed to the user, so that later we can run a global 'get size'
// operation.
var ftDirs = new Array();

function ftAddDir( path )
{
	ftDirs.push( path );
}

// Runs over the list of dirs built above and calls the GetSize function for each.
function ftGetAllSizes()
{
	for(i=0;i<ftDirs.length;i++)
	{
		getDirSize( ftDirs[i], false );
	}
}

// Similar to the above but for deployments
var deployDirs = new Array();
var deployDirIDs = new Array();

function deployAddDir( div, id )
{
	deployDirs.push( div );
	deployDirIDs.push( id );
}

// Runs over the list of deployments on deploymentlist.php and calls the GetSize function for each.
function deployGetAllSizes()
{
	dirSizeSum=0;
	for(i=0;i<deployDirs.length;i++)
	{
		getDirSize( deployDirs[i], deployDirIDs[i] );
	}
}


// Pop a message box if a user tries to access a file they have no access to
function mbNoAccess()
{
	alert( "Sorry, you do not have access to this file." );
}

function mbNoAccessDir()
{
	alert( "Sorry, you do not have access to this directory." );
}

// Port from PHP original
function size_translate( filesize )
{
	arrayPowers = new Array();
   
	arrayPowers['YB'] = 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024;
	arrayPowers['ZB'] = 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024;
	arrayPowers['EB'] = 1024 * 1024 * 1024 * 1024 * 1024 * 1024;
	arrayPowers['PB'] = 1024 * 1024 * 1024 * 1024 * 1024;
	arrayPowers['TB'] = 1024 * 1024 * 1024 * 1024;
	arrayPowers['GB'] = 1024 * 1024 * 1024;
	arrayPowers['MB'] = 1024 * 1024;
	arrayPowers['KB'] = 1024;

	if( filesize <= 1024 )
	{
		filesize = filesize + " Bytes";
	}
	
	for( i in arrayPowers )
	{
		if(filesize > arrayPowers[i] || filesize == arrayPowers[i] )
		{
			filesize = Math.round((Math.round(filesize / arrayPowers[i] * 100) / 100)*100)/100 + " " + i;
		}
	}
	return filesize;
}