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Added PHP and JS JSON libraries for replacement of XAJAX
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Andreas Stöckel
parent
2aa6baddcb
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145
phpgwapi/inc/class.egw_json.inc.php
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145
phpgwapi/inc/class.egw_json.inc.php
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<?php
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/**
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* eGroupWare API: JSON - Contains functions and classes for doing JSON requests.
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*
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* @link http://www.egroupware.org
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @subpackage ajax
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* @author Andreas Stoeckel
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* @version $Id:$
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*/
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/* Class which handles JSON requests to the server */
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class egw_json_request
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{
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/* Parses the raw input data supplied with the input_data parameter and calls the
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callback function, passing the "menuaction" and all parameters supplied in the request to it.
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@param string $input_data is the RAW input data as it was received from the client
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@param callback $callback(string $menuaction, array $parameters) called when a valid request has been received. The result of the callback function will be returned by parseRequest
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@returns NULL if parsing the request failed, or the result of the callback function if the request has been successfully decoded.*/
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public function parseRequest($input_data, $callback)
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{
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//Decode the JSON input data into associative arrays
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if ($json = json_decode(stripslashes($input_data), true))
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{
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//Get the request array
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if (isset($json['request']))
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{
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$request = $json['request'];
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//Check whether the "menuaction" string exists
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if (isset($request['menuaction']))
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{
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//Check whether any parameters were supplied along with the request
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$parameters = array();
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if (isset($request['parameters']))
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$parameters = $request['parameters'];
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//Call the supplied callback function along with the menuaction and the passed parameters
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return call_user_func($callback, $request['menuaction'], $parameters);
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}
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}
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}
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return NULL;
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}
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}
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class egw_json_response
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{
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/* A response can only contain one generic data part. This variable is used to
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store, whether a data part had already been added to the response.*/
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private $hasData = false;
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/* Holds the actual response data which is then encoded to JSON once the "getJSON"
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function is called */
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protected $responseArray = array();
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/* Adds any type of data to the response array */
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protected function addGeneric($key, $data)
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{
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$this->responseArray[] = array(
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"type" => $key,
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"data" => $data);
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}
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/* Adds a "data" response to the json response. This function may only be called once
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for a single JSON response object.
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@param object/array/string $data can be of any data type and will be added JSON Encoded to your response.*/
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public function addData($data)
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{
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/* Only allow adding the data response once */
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if (!$this->hasData)
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{
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$this->addGeneric('data', $data);
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$this->hasData = true;
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}
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else
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{
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throw new Exception("Adding more than one data response to a JSON response is not allowed.");
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}
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}
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/* Adds an "alert" to the response which can be handeled on the client side. The default implementation simply displays
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the text supplied here with the JavaScript function "alert".
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@param string $message contains the actual message being sent to the client.
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@param string $details (optional) can be used to inform the user on the client side about additional details about the error. This might be information how the error can be resolved/why it was raised or simply some debug data.*/
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public function addAlert($message, $details = '')
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{
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if (is_string($message) && is_string($details))
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{
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$this->addGeneric('alert', array(
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"message" => $message,
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"details" => $details));
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}
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else
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{
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throw new Exception("Invalid parameters supplied.");
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}
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}
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/* Allows you to add a generic java script to the response which will be executed upon the request gets received. Deprecated.
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@deprecated
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@param string $script the script code which should be executed upon receiving*/
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public function addScript($script)
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{
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if (is_string($script))
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{
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$this->addGeneric('script', $script);
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}
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else
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{
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throw new Exception("Invalid parameters supplied.");
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}
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}
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/* Adds an html assign to the response, which is excecuted upon the request is received. Deprecated, just for compatibility with XAJAX
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@deprecated
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@param string $id the identifier of the html element in which the assign shall take place
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@param string $key the key in the html element which should be modified when the assign takes place.
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@param string $value the value which should be assigned to the given key*/
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public function addAssign($id, $key, $value)
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{
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if (is_string($id) && is_string($key) && (is_string($value) || is_numeric($value)))
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{
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$this->addGeneric('assign', array(
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"id" => $id,
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"key" => $key,
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"value" => $value));
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}
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else
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{
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throw new Exception("Invalid parameters supplied");
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}
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}
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/* Returns the actual JSON code generated by calling the above "add" function.*/
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public function getJSON()
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{
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/* Wrap the result array into a parent "response" Object */
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$res['response'] = $this->responseArray;
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return json_encode($res, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP);
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}
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}
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144
phpgwapi/js/egw_json.js
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144
phpgwapi/js/egw_json.js
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/**
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* eGroupWare API: JSON - Contains the client side javascript implementation of class.egw_json.inc.php
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*
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* @link http://www.egroupware.org
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @subpackage ajax
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* @author Andreas Stoeckel
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* @version $Id:$
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*/
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/* The egw_json_request is the javaScript side implementation of class.egw_json.inc.php.*/
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/* The constructor of the egw_json_request class.
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* @param string _url the url of the AJAX handler on the server
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* @param string _menuaction the menuaction function which should be called and which handles the actual request
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* @param array _parameters which should be passed to the menuaction function.
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*/
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function egw_json_request(_url, _menuaction, _parameters)
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{
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//Copy the supplied parameters
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this.menuaction = _menuaction;
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this.parameters = _parameters;
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this.url = _url;
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this.sender = null;
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this.callback = null;
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this.alertHandler = this.alertFunc;
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if (document.alertHandler)
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{
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this.alertHandler = document.alertHandler;
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}
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}
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/* Sends the AJAX JSON request.
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* @param boolean _async specifies whether the request should be handeled asynchronously (true, the sendRequest function immediately returns to the caller) or asynchronously (false, the sendRequest function waits until the request is received)
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* @param _callback is an additional callback function which should be called upon a "data" response is received
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* @param _sender is the reference object the callback function should get
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*/
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egw_json_request.prototype.sendRequest = function(_async, _callback, _sender)
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{
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//Store the sender and callback parameter inside this class
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this.sender = _sender;
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if (typeof _callback != "undefined")
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this.callback = _callback;
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//Copy the async parameter which defaults to "true"
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var is_async = true;
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if (typeof _async != "undefined")
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is_async = _async;
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//Assemble the actual request string
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var request = '{';
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request += '"request":{';
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request += '"menuaction":"' + this.menuaction + '"';
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if (this.parameters)
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{
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request += ',"parameters":[';
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for (var i = 0; i < this.parameters.length; i++)
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{
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if (i > 0)
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{
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request += ',';
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}
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request += '"' + this.parameters[i] + '"';
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}
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request += ']';
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}
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request += '}}';
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var request_obj = new Object();
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request_obj.json_data = request;
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//Send the request via the jquery AJAX interface to the server
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$.ajax({url: this.url,
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async: is_async,
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context: this,
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data: request_obj,
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dataType: 'json',
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type: 'POST',
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success: this.handleResponse});
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}
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egw_json_request.prototype.alertFunc = function(_message, _details)
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{
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alert(_message);
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}
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/* Internal function which handles the response from the server */
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egw_json_request.prototype.handleResponse = function(data, textStatus, XMLHttpRequest)
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{
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if (data.response)
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{
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var hasResponse = false;
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for (var i = 0; i < data.response.length; i++)
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{
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switch (data.response[i].type)
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{
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case 'alert':
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//Check whether all needed parameters have been passed and call the alertHandler function
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if ((typeof data.response[i].data.message != 'undefined') &&
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(typeof data.response[i].data.details != 'undefined'))
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{
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this.alertHandler(
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data.response[i].data.message,
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data.response[i].data.details)
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hasResponse = true;
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}
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break;
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case 'assign':
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//Check whether all needed parameters have been passed and call the alertHandler function
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if ((typeof data.response[i].data.id != 'undefined') &&
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(typeof data.response[i].data.key != 'undefined') &&
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(typeof data.response[i].data.value != 'undefined'))
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{
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var obj = document.getElementById(data.response[i].data.id);
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if (obj)
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{
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obj[data.response[i].data.key] = data.response[i].data.value;
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}
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hasResponse = true;
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}
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break;
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case 'data':
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//Callback the caller in order to allow him to handle the data
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this.callback.call(this.sender, data.response[i].data);
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hasResponse = true;
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break;
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case 'script':
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if (typeof data.response[i].data == 'string')
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{
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eval(data.response[i].data);
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hasResponse = true;
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}
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break;
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}
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}
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/* If no explicit response has been specified, call the callback (if one was set) */
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if (!hasResponse && this.callback)
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{
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this.callback.call(this.sender, data.response[i].data);
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}
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}
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}
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