egroupware/phpgwapi/js/egw_json.js

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/**
* eGroupWare API: JSON - Contains the client side javascript implementation of class.egw_json.inc.php
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage ajax
* @author Andreas Stoeckel <as@stylite.de>
* @version $Id$
*/
/* The egw_json_request is the javaScript side implementation of class.egw_json.inc.php.*/
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function _egw_json_escape_string(input)
{
var len = input.length;
var res = "";
for (var i = 0; i < len; i++)
{
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switch (input.charAt(i))
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{
case '"':
res += '\\"';
break;
case '\n':
res += '\\n';
break;
case '\r':
res += '\\r';
break;
case '\\':
res += '\\\\';
break;
case '\/':
res += '\\/';
break;
case '\b':
res += '\\b';
break;
case '\f':
res += '\\f';
break;
case '\t':
res += '\\t';
break;
default:
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res += input.charAt(i);
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}
}
return res;
}
function _egw_json_encode_simple(input)
{
switch (input.constructor)
{
case String:
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return '"' + _egw_json_escape_string(input) + '"';
case Number:
return input.toString();
case Boolean:
return input ? 'true' : 'false';
default:
return null;
}
}
function egw_json_encode(input)
{
if (input == null || !input && input.length == 0) return 'null';
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var simple_res = _egw_json_encode_simple(input);
if (simple_res == null)
{
switch (input.constructor)
{
case Array:
var buf = [];
for (var k in input)
{
//Filter non numeric entries
if (!isNaN(k))
buf.push(egw_json_encode(input[k]));
}
return '[' + buf.join(',') + ']';
case Object:
var buf = [];
for (var k in input)
{
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buf.push(_egw_json_encode_simple(k) + ':' + egw_json_encode(input[k]));
}
return '{' + buf.join(',') + '}';
default:
return 'null';
}
}
else
{
return simple_res;
}
}
/**
* Some variables needed to store which JS and CSS files have already be included
*/
var egw_json_files = {};
/**
* Variable which stores all currently registered plugins
*/
var _egw_json_plugins = [];
/**
* Register a plugin for the egw_json handler
*/
function egw_json_register_plugin(_callback, _context)
{
//Default the context parameter to "window"
if (typeof _context == 'undefined') {
_context = window;
}
//Add a plugin object to the plugins array
_egw_json_plugins[_egw_json_plugins.length] = {
'callback': _callback,
'context': _context
};
}
/**
* Function used internally to pass a response to all registered plugins
*/
function _egw_json_plugin_handle(_type, _response) {
for (var i = 0; i < _egw_json_plugins.length; i++)
{
try {
var plugin = _egw_json_plugins[i];
if (plugin.callback.call(plugin.context, _type, _response)) {
return true;
}
} catch (e) {
if (typeof console != 'undefined')
{
console.log(e);
}
}
}
return false;
}
/** The constructor of the egw_json_request class.
*
* @param string _menuaction the menuaction function which should be called and
* which handles the actual request. If the menuaction is a full featured
* url, this one will be used instead.
* @param array _parameters which should be passed to the menuaction function.
* @param object _context is the context which will be used for the callback function
*/
function egw_json_request(_menuaction, _parameters, _context)
{
this.context = window.document;
if (typeof _context != 'undefined')
this.context = _context;
if (typeof _parameters != 'undefined')
{
this.parameters = _parameters;
}
else
{
this.parameters = new Array;
}
// Check whether the supplied menuaction parameter is a full featured url
// or just a menuaction
if (_menuaction.match(/json.php\?menuaction=[a-z_0-9]*\.[a-z_0-9]*\.[a-z_0-9]*/i))
{
// Menuaction is a full featured url
this.url = _menuaction
}
else
{
// We only got a menu action, assemble the url manually.
this.url = this._assembleAjaxUrl(_menuaction);
}
this.request = null;
this.sender = null;
this.callback = null;
this.alertHandler = this.alertFunc;
this.onLoadFinish = null;
this.loadedJSFiles = {};
this.handleResponseDone = false;
if (window.egw_alertHandler)
{
this.alertHandler = window.egw_alertHandler;
}
}
egw_json_request.prototype._assembleAjaxUrl = function(_menuaction)
{
// Retrieve the webserver url
var webserver_url = egw_topWindow().egw_webserverUrl;
// Check whether the webserver_url is really set
// Don't check for !webserver_url as it might be empty.
// Thank you to Ingo Ratsdorf for reporting this.
if (typeof webserver_url == "undefined")
{
throw "Internal JS error, top window not found, webserver url could not be retrieved.";
}
// Add the ajax relevant parts
return webserver_url + '/json.php?menuaction=' + _menuaction;
}
/**
* Sends the AJAX JSON request.
*
* @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)
* @param _callback is an additional callback function which should be called upon a "data" response is received
* @param _sender is the reference object the callback function should get
*/
egw_json_request.prototype.sendRequest = function(_async, _callback, _sender)
{
//Store the sender and callback parameter inside this class
this.sender = _sender;
if (typeof _callback != "undefined")
this.callback = _callback;
//Copy the async parameter which defaults to "true"
var is_async = true;
if (typeof _async != "undefined")
is_async = _async;
//Assemble the actual request object containing the json data string
var request_obj = {
"json_data": egw_json_encode(
{
"request": {
"parameters": this.parameters
}
})
};
//Send the request via the jquery AJAX interface to the server
this.request = $.ajax({url: this.url,
async: is_async,
context: this,
data: request_obj,
dataType: 'json',
type: 'POST',
success: this.handleResponse,
error: function(_xmlhttp,_err) { alert('Ajax request to ' + this.url + ' failed: ' + _err); }
});
}
egw_json_request.prototype.abort = function()
{
this.request.abort();
}
egw_json_request.prototype.alertFunc = function(_message, _details)
{
alert(_message);
if(_details) _egw_json_debug_log(_message, _details);
}
function _egw_json_debug_log(_msg, _e)
{
if (typeof console != "undefined" && typeof console.log != "undefined")
{
console.log(_msg, _e);
}
}
/* Displays an json error message */
egw_json_request.prototype.jsonError = function(_msg, _e)
{
var msg = 'EGW JSON Error: '._msg;
//Log and show the error message
_egw_json_debug_log(msg, _e);
this.alertHandler(msg);
}
/* Internal function which handles the response from the server */
egw_json_request.prototype.handleResponse = function(data, textStatus, XMLHttpRequest)
{
this.handleResponseDone = false;
if (data && data.response)
{
var hasResponse = false;
for (var i = 0; i < data.response.length; i++)
{
try
{
var res = data.response[i];
switch (data.response[i].type)
{
case 'alert':
//Check whether all needed parameters have been passed and call the alertHandler function
if ((typeof res.data.message != 'undefined') &&
(typeof res.data.details != 'undefined'))
{
this.alertHandler(
res.data.message,
res.data.details)
hasResponse = true;
} else
throw 'Invalid parameters';
break;
case 'assign':
//Check whether all needed parameters have been passed and call the alertHandler function
if ((typeof res.data.id != 'undefined') &&
(typeof res.data.key != 'undefined') &&
(typeof res.data.value != 'undefined'))
{
var obj = document.getElementById(res.data.id);
if (obj)
{
obj[res.data.key] = res.data.value;
hasResponse = true;
}
} else
throw 'Invalid parameters';
break;
case 'data':
//Callback the caller in order to allow him to handle the data
if (this.callback)
{
this.callback.call(this.sender, res.data);
hasResponse = true;
}
break;
case 'script':
if (typeof res.data == 'string')
{
try
{
var func = function() {eval(res.data);};
func.call(window);
}
catch (e)
{
e.code = res.data;
_egw_json_debug_log(e);
}
hasResponse = true;
} else
throw 'Invalid parameters';
break;
case 'jquery':
if (typeof res.data.select == 'string' &&
typeof res.data.func == 'string')
{
try
{
var jQueryObject = $(res.data.select, this.context);
jQueryObject[res.data.func].apply(jQueryObject, res.data.parms);
}
catch (e)
{
_egw_json_debug_log(e, {'Function': res.data.func, 'Parameters': res.data.params});
}
hasResponse = true;
} else
throw 'Invalid parameters';
break;
case 'redirect':
if (typeof res.data.url == 'string' &&
typeof res.data.global == 'boolean')
{
//Special handling for framework reload
res.data.global |= (res.data.url.indexOf("?cd=10") > 0);
if (res.data.global)
{
egw_topWindow().location.href = res.data.url;
}
else
{
window.location.href = res.data.url;
}
hasResponse = true;
} else
throw 'Invalid parameters';
break;
case 'css':
if (typeof res.data == 'string')
{
//Check whether the requested file had already be included
if (!egw_json_files[res.data])
{
egw_json_files[res.data] = true;
//Get the head node and append a new link node with the stylesheet url to it
var headID = document.getElementsByTagName('head')[0];
var cssnode = document.createElement('link');
cssnode.type = "text/css";
cssnode.rel = "stylesheet";
cssnode.href = res.data;
headID.appendChild(cssnode);
}
hasResponse = true;
} else
throw 'Invalid parameters';
break;
case 'js':
if (typeof res.data == 'string')
{
//Check whether the requested file had already be included
if (!egw_json_files[res.data])
{
egw_json_files[res.data] = true;
//Get the head node and append a new script node with the js file to it
var headID = document.getElementsByTagName('head')[0];
var scriptnode = document.createElement('script');
scriptnode.type = "text/javascript";
scriptnode.src = res.data;
scriptnode._originalSrc = res.data;
headID.appendChild(scriptnode);
//Increment the includedJSFiles count
this.loadedJSFiles[res.data] = false;
if (typeof console != 'undefined' && typeof console.log != 'undefined')
console.log("Requested JS file '%s' from server", [res.data]);
var self = this;
//FF, Opera, Chrome
scriptnode.onload = function(e) {
var file = e.target._originalSrc;
if (typeof console != 'undefined' && typeof console.log != 'undefined')
console.log("Retrieved JS file '%s' from server", [file]);
self.loadedJSFiles[file] = true;
self.checkLoadFinish();
};
//IE
if (typeof scriptnode.readyState != 'undefined')
{
if (scriptnode.readyState != 'complete' &&
scriptnode.readyState != 'loaded')
{
scriptnode.onreadystatechange = function() {
var node = window.event.srcElement;
if (node.readyState == 'complete' || node.readyState == 'loaded') {
var file = node._originalSrc;
if (typeof console != 'undefined' && typeof console.log != 'undefined')
console.log("Retrieved JS file '%s' from server", [file]);
self.loadedJSFiles[file] = true;
self.checkLoadFinish();
}
};
}
else
{
this.loadedJSFiles[res.data] = true;
}
}
}
hasResponse = true;
} else
throw 'Invalid parameters';
break;
case 'error':
if (typeof res.data == 'string')
{
this.jsonError(res.data);
hasResponse = true;
} else
throw 'Invalid parameters';
break;
}
//Try to handle the json response with all registered plugins
hasResponse |= _egw_json_plugin_handle(data.response[i].type, res);
} catch(e) {
this.jsonError('Internal JSON handler error', e);
}
}
/* If no explicit response has been specified, call the callback (if one was set) */
if (!hasResponse && this.callback && data.response[i])
{
this.callback.call(this.sender, data.response[i].data);
}
this.handleResponseDone = true;
this.checkLoadFinish();
}
}
/**
* The "onLoadFinish" handler gets called after all JS-files have been loaded
* successfully
*/
egw_json_request.prototype.checkLoadFinish = function()
{
var complete = true;
for (var key in this.loadedJSFiles)
complete = complete && this.loadedJSFiles[key];
if (complete && this.onLoadFinish && this.handleResponseDone)
{
this.onLoadFinish.call(this.sender);
}
}
function egw_json_getFormValues(_form, _filterClass)
{
var elem = null;
if (typeof _form == 'object')
{
elem = _form;
}
else
{
elem = document.getElementsByName(_form)[0];
}
var serialized = new Object;
if (typeof elem != "undefined" && elem && elem.childNodes)
{
if (typeof _filterClass == 'undefined')
_filterClass = null;
_egw_json_getFormValues(serialized, elem.childNodes, _filterClass)
}
return serialized;
}
/**
* Deprecated legacy xajax wrapper functions for the new egw_json interface
*/
_xajax_doXMLHTTP = function(_async, _menuaction, _arguments)
{
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/* Assemble the parameter array */
var paramarray = new Array();
for (var i = 1; i < _arguments.length; i++)
{
paramarray[paramarray.length] = _arguments[i];
}
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/* Create a new request, passing the menuaction and the parameter array */
var request = new egw_json_request(_menuaction, paramarray);
/* Send the request */
request.sendRequest(_async);
return request;
}
xajax_doXMLHTTP = function(_menuaction)
{
return _xajax_doXMLHTTP(true, _menuaction, arguments);
}
xajax_doXMLHTTPsync = function(_menuaction)
{
return _xajax_doXMLHTTP(false, _menuaction, arguments);
};
window.xajax = {
"getFormValues": function(_form)
{
return egw_json_getFormValues(_form);
}
};
/*
The following code is adapted from the xajax project which is licensed under
the following license
@copyright Copyright (c) 2005-2007 by Jared White & J. Max Wilson
@copyright Copyright (c) 2008-2009 by Joseph Woolley, Steffen Konerow, Jared White & J. Max Wilson
@license http://www.xajaxproject.org/bsd_license.txt BSD License
*/
/**
* used internally by the legacy "egw_json_response.getFormValues" to recursively
* run over all form elements
* @param serialized is the object which will contain the form data
* @param children is the children node of the form we're runing over
* @param string _filterClass if given only return
*/
function _egw_json_getFormValues(serialized, children, _filterClass)
{
//alert('_egw_json_getFormValues(,,'+_filterClass+')');
for (var i = 0; i < children.length; ++i) {
var child = children[i];
if (typeof child.childNodes != "undefined")
_egw_json_getFormValues(serialized, child.childNodes, _filterClass);
if ((!_filterClass || $(child).hasClass(_filterClass)) && typeof child.name != "undefined")
{
//alert('_egw_json_getFormValues(,,'+_filterClass+') calling _egw_json_getFormValue for name='+child.name+', class='+child.class+', value='+child.value);
_egw_json_getFormValue(serialized, child);
}
}
}
function _egw_json_getObjectLength(_obj)
{
var res = 0;
for (key in _obj)
{
if (_obj.hasOwnProperty(key))
res++;
}
return res;
}
/**
* used internally to serialize
*/
function _egw_json_getFormValue(serialized, child)
{
//Return if the child doesn't have a name, is disabled, or is a radio-/checkbox and not checked
if ((typeof child.name == "undefined") || (child.disabled && child.disabled == true) ||
(child.type && (child.type == 'radio' || child.type == 'checkbox' || child.type == 'button' || child.type == 'submit') && (!child.checked)))
{
return;
}
var name = child.name;
var values = null;
if ('select-multiple' == child.type)
{
values = new Array;
for (var j = 0; j < child.length; ++j)
{
var option = child.options[j];
if (option.selected == true)
values.push(option.value);
}
}
else
{
values = child.value;
}
//Special treatment if the name of the child contains a [] - then all theese
//values are added to an array.
var keyBegin = name.indexOf('[');
if (0 <= keyBegin) {
var n = name;
var k = n.substr(0, n.indexOf('['));
var a = n.substr(n.indexOf('['));
if (typeof serialized[k] == 'undefined')
serialized[k] = new Object;
var p = serialized; // pointer reset
while (a.length != 0) {
var sa = a.substr(0, a.indexOf(']')+1);
var lk = k; //save last key
var lp = p; //save last pointer
a = a.substr(a.indexOf(']')+1);
p = p[k];
k = sa.substr(1, sa.length-2);
if (k == '') {
if ('select-multiple' == child.type) {
k = lk; //restore last key
p = lp;
} else {
k = _egw_json_getObjectLength(p);
}
}
if (typeof p[k] == 'undefined')
{
p[k] = new Object;
}
}
p[k] = values;
} else {
//Add the value to the result object with the given name
if (typeof values != "undefined")
{
serialized[name] = values;
}
}
}