/**
*  CrossBrowserAjax, version 1.10
*  (c) 2007 CrossBrowserAjax.com
*
*  CrossBrowserAjax is freely distributable under the terms of an MIT-style license.
*  Type: Uncompressed
*/

/////////// DOM ////////////////////////////

/**
* Interface for DOM
* @class Interface for DOM
* @author crossbrowserajax.com
* @version 1.0
*/
function cbaDOM() {

/**
 * Remove Element 
 *
 * @author crossbrowserajax.com
 * @param _element dom-element
 * @member cbaDOM
 */
this.removeElement = function(_element) {
	_element.parentNode.removeChild(_element);
}

 /**
  * Create Element
  *
  * @author crossbrowserajax.com
  * @return link on element
  * @param _parent parent for element
  * @param _type type of element (tag name)
  * @param _property assotiative array for property. Example: {'className' : 'my-class' , 'style.color' : '#f00' }. 
  * Warning: support only one-level & two-level parameters (one-level - 'className' or two-level - 'style.color')
  * @param _text tag content (any text)
  * @member cbaDOM
  */
this.createElement = function( _parent, _type, _property, _text ) {
	// create element
	var el = document.createElement(_type);
	// set all properties
	for (var k in _property) 
	{
		var keys = k.split('.');
		// if 'k' - object
		if (keys.length == 2)
		{
			el[keys[0]][keys[1]] = _property[k];
		}
		else
		{
			el[k] = _property[k];
		}  
	}
	// add text in the tag
	if (_text != '') el.innerHTML = _text;
	// add in a parent
	_parent.appendChild(el);
	// link on element
	return el;
}

/**
 * Create Script-Tag.
 * Please! Don't use function 'createElement' for creating SCRIPT-Tag
 *
 * @author crossbrowserajax.com
 * @param _parent parent for element
 * @param _id id for parent tag (span)
 * @param _request url-request
 * @member cbaDOM
 */  
this.createScript = function( _parent, _id, _request ) {
	var span = this.createElement( _parent, 'span', {'style.display' : 'none', 'id' : _id}, '%<s' + 'cript></' + 'script>' );
	setTimeout(
		function(){
			var _script  = span.getElementsByTagName('script')[0];
			_script.type = 'text/javascript';
			_script.src  = _request;
		}, 5);
	}
}

/////////// CACHE ////////////////////////////


/**
* Cache
*
* @package CBA
* @author crossbrowserajax.com
* @version 1.0
* @param buffer_size buffer size (amount request)
* @param length_ct length string for analysis (for control total)
*/
function cbaCache( buffer_size, length_ct ) {
 /**
  * Request Control Total
  *
  * @author crossbrowserajax.com
  * @return control total ( integer )
  * @param _request url-request
  * @param _length length string for analysis
  */
this._rct = function( _request, _length ) {
	//_request  = escape(_request);
	var control = 0;
	var start	= Math.floor(_request.length / _length);
	if (start < 1) start = 1;
	for (var i  = _request.length; i > 0; i-=start){
		control  += '												!"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ˆ?‚?„…†‡?‰S‹??Z??‘’“”•–—?™s›??zY ???¤?¦§?©?«¬­®?°±???µ¶·???»????AAAAAA?CEEEEIIII?NOOOOO?OUUUUY??aaaaaa?ceeeeiiii?nooooo?ouuuuy?y'.indexOf(_request.charAt(i));}
	return control;
}

 /**
  * Search Cache
  *
  * @author crossbrowserajax.com
  * @param _request url-request
  */
this._search = function( _request ) {
	// hash generate
	var _hash = this._rct( _request, this._length_ct );
	// viewing the cache
	for (i in this._cache)
	{
		if (this._cache[i][0] == _hash && this._cache[i][1] == _request)
		{
			this._search_buffer = this._data_cache[i];
			return true;
		}
	}
	return false;
}

 /**
  * Add Cache
  *
  * @author crossbrowserajax.com
  * @param _request url-request
  * @param _data data
  */
this._add  = function( _request, _data ) {
	// checking the limit of memories
	if ( this._cache_index >= this._buffer_size )
	{
		this._cache_index = 0;
	}
	// hash generate
	var _hash = this._rct( _request, this._length_ct );
	// caching
	this._cache[this._cache_index] = [_hash, _request];
	this._data_cache[this._cache_index] = _data;
	
	this._cache_index++;
}

 /**
  * Initializing
  *
  * @author crossbrowserajax.com
  * @param buffer_size buffer size
  * @param length_ct length string for analysis (for control total)
  */
this._init = function( buffer_size, length_ct ) {

	/** buffer_size */
	this._buffer_size = buffer_size;
	
	/** length string for analysis (for control total) */
	this._length_ct = length_ct;
	
	/** cache */
	this._cache			= new Array();
	
	/** data cache */
	this._data_cache  = new Array();
	
	/** current index of cache */
	this._cache_index = 0;
	
	/** search result buffer */
	this._search_buffer = null;
	
}

 /** Init Class */
this._init( buffer_size, length_ct );
}

/////////// C.B.A. ( core ) ////////////////////////////

/**
* C.B.A.
* 
* @class CrossBrowserAjax. Core.
* @author crossbrowserajax.com
* @version 1.10
* @base cbaDOM
*/
function cbaRequest() {

 /**
  * Initializing the C.B.A. Class
  *
  * @author crossbrowserajax.com
  * @member cbaRequest
  */
this._init = function() {
	/** parent element id-name */
	this._parent_id_name = '_cba_parent_id';

	/** name id in url-request */
	this._url_id = '_cba_request_id';

	/** prefix for created request */
	this._id_prefix = '_cba_pack_';

	/** interface for dom */
	this.dom = new cbaDOM();

	/** parent element */
	this._parent_element = this.createParentElement();

	/** cache of requests */
	this._requests = new Array();

	/* cache */
	/** caching enabled  */
	this._caching_enabled = true;

	if ( this._caching_enabled )
	{

		/** buffer_size */
		this._buffer_size = 25;

		/** length string for analysis (for control total) */
		this._length_ct = 100;

		/** cache */
		this.cache = new cbaCache( this._buffer_size, this._length_ct );

	}
}
		
 /**
  * Making the Container for <SCRIPT>
  *
  * @author crossbrowserajax.com
  * @return element
  * @member cbaRequest
  */
this.createParentElement = function() {
	// create element unless exists
	if ( document.getElementById( this._parent_id_name ) )
	{
		return document.getElementById( this._parent_id_name );
	}
	else
	{
		return this.dom.createElement( document.body, 'div', {'id' : this._parent_id_name}, '' );
	}
}

 /**
  * Remote Query
  *
  * @author crossbrowserajax.com
  * @param _url url-address for backend
  * @param _callback callback-function
  * @param _use_cache use the cache (unnecessary argument)
  * @member cbaRequest
  */
this.query = function( _url , _callback ) {
	// set _use_cache
	if ( arguments.length > 2 ) {
		var _use_cache = arguments[2];
	} else {
		var _use_cache = true;
	}
	
	// search in cache();
	if ( _use_cache && ( this.cache && this.cache._search( _url ) ) ) {
		// rec result in 'this.answer'
		this.answer = this.cache._search_buffer;
		// run user function
		if (_callback instanceof Function)
			_callback();
	} else {
		// create id
		var _id = this._requests.push( {'callback' : _callback, 'request' : _url } ) - 1;
		/** shaping url */
		if ( _url.indexOf('?') == -1 ) {
			_url += '?';
		} else {
			_url += '&';
		}
		_url += this._url_id + '=' + _id;
		// create <SCRIPT>
		this.dom.createScript( this._parent_element, this._id_prefix + _id, _url );
	}  
}

 /**
  * Processing Results
  *
  * @author crossbrowserajax.com
  * @param _id id of request
  * @param _result response
  * @member cbaRequest
  */
this.ready = function( _id, _result ) {
	// rec result in 'this.answer'
	this.answer = _result;
	// save in cache
	if ( this.cache ) this.cache._add( this._requests[_id].request, _result );
	// run user function
	if (this._requests[_id].callback instanceof Function) this._requests[_id].callback();
	// remove <SCRIPT>
	if (document.getElementById( this._id_prefix + _id ))
	{
		this.dom.removeElement( document.getElementById( this._id_prefix + _id ) );
	}
	// clear id
	delete( this._requests[_id] );
}

 /** Init Class */
this._init( arguments );

}  


/////////// use CBA ////////////////////////

/**
* CBA Object. Internal Variable for CBA
* Do not Use This Variable for Other Integer.
*/
var _cba = null;

/**
* Load of Data In ID.
*
* @author crossbrowserajax.com
* @version 1.00
* @param _doc_id ID in (X)HTML-document
* @param _url url-address for request (backend)
* @param _loading_text text/html (unnecessary argument)
* @param _caching caching enabled (unnecessary argument)
* @param _template template for show (unnecessary argument)
* More:
* if parameter is not given or is null, that occurs simple insertion,
* otherwise occurs processing the pattern.
* %keyname%, keyname - key in array
* Exapmle:
*	// Error Response
*	_cba.ready (
*	 100, // 100 is ID
*	 {
*		'age'  : '50',
*		'city' : 'New York'
*	 }
*  );
*	// Template Value:	'Age: %age%; City: %city%'
*	// Result:				Age: 50; City: New York
* @param _error_template template for error ( for incorrect data )(unnecessary argument)
* _error_template is array. First parameter - sign of the error, second parameter - text for show.
* Exapmle: [null,'Error!']. If response == null Then print 'Error!'.
* More:
*	// Error Response
*	_cba.ready (
*	 100, // 100 is ID
*	 null // sign of the error
*  );
* @param _user_method method (unnecessary argument)
* Exapmle: function(){alert('Loading Completed'); }
* @base cbaRequest
*/
function cbaUpdateElement ( _doc_id, _url ) {
	var _loading_text	= (arguments[2]) ? arguments[2] : null;			// set _loading_text
	var _caching		= (arguments.length > 3) ? arguments[3] : true;	// set _caching
	var _template		= (arguments[4]) ? arguments[4] : '%1';			// set _template
	var _error_template	= (arguments[5]) ? arguments[5] : null;			// set error template
	var _user_method	= (arguments[6]) ? arguments[6] : null;			// set user method

	// status of loading
	if( _loading_text) document.getElementById( _doc_id ).innerHTML = _loading_text;

	// create CBA object (unless exists)
	if( !_cba) _cba = new cbaRequest();
	// query
	_cba.query( _url, function() {
		// if it is used error template
		if ( ( _error_template) && _cba.answer == _error_template[0] ) {
			// write for error
			document.getElementById( _doc_id ).innerHTML = _error_template[1]; 
		} else {
			// is object
			if (typeof(_cba.answer) == 'object') {
				var _result = _template;
				// see all values and keys
				for( var key in _cba.answer) {
					_result = _result.replace('%' + key + '%', _cba.answer[key]); 
				}
				// write result
				document.getElementById( _doc_id ).innerHTML = _result; 
			} else {
				// write result 
				document.getElementById( _doc_id ).innerHTML = _template.replace('%1', _cba.answer); 
			}
		}
		// run user method
		if ( _user_method && _user_method instanceof Function ) _user_method();
	}, _caching );
}