/*-----------------------------------------------------------------------------
	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/MPL-1.1.html
	
	Software distributed under the 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.
	
	The Original Code is Fever Framework code.
	
	The Initial Developer of the Original Code is Romain Ecarnot.
	Portions created by Initial Developer are Copyright (C) 2006
	the Initial Developer. All Rights Reserved.
	
	Contributor(s):
	
	Unless required by applicable law or agreed to in writing, software
	distributed under the License is distributed on an "AS IS" BASIS,
	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	See the License for the specific language governing permissions and
	limitations under the License.
-----------------------------------------------------------------------------*/

import com.bourre.core.HashCodeFactory;

import fever.data.hasher.Hasher;

/**
 * Generates an unique 32 digits ID.
 *
 * @author Romain Ecarnot
 */
class fever.utils.UIDUtil
{
	//-------------------------------------------------------------------------
	// Public API
	//-------------------------------------------------------------------------
	
	/**
	 * Creates an ID.
	 */
	public static function createUID() : String
	{
		var tb : Number = ( new Date() ).getTime();
		var sb : String = System.capabilities.serverString;
		var pr : Number = Math.random() * Number.MAX_VALUE; 
		var hc : Number = HashCodeFactory.getNextKEY();
		
		var hasher : Hasher = new Hasher();
		return _format( hasher.hash( tb + sb + pr + hc ) );
	}
	
	
	//-------------------------------------------------------------------------
	// Private implementation
	//-------------------------------------------------------------------------
	
	private static function _format( value : String ) : String
	{
		var result : Array = new Array();
		var mask : String = 'XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX';
		var j : Number = 0;
		
		for( var i : Number = 0; i < 36; i++ )
		{
			if( mask.charAt(i) == 'X' )	result[i] = value.charAt( i - j ).toUpperCase();
			else
			{
				result[i] = mask.charAt(i);
				j++;
			}
		}
		
		return result.join( '' );
	}
	
	private function UIDUtil () {}	
	
}