egroupware_official/phpgwapi/js/jsapi/egw_json.js

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/**
* EGroupware clientside API object
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @subpackage api
* @link http://www.egroupware.org
* @author Andreas Stöckel (as AT stylite.de)
* @author Ralf Becker <RalfBecker@outdoor-training.de>
* @version $Id$
*/
"use strict";
/*egw:uses
jquery.jquery;
egw_core;
egw_utils;
egw_files;
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egw_debug;
*/
egw.extend('json', egw.MODULE_WND_LOCAL, function(_app, _wnd) {
/**
* Object which contains all registered handlers for JS responses.
* The handlers are organized per response type in the top level of the
* object, where each response type can have an array of handlers attached
* to it.
*/
var plugins = {};
/**
* Internal implementation of the JSON request object.
*/
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function json_request(_menuaction, _parameters, _callback, _context,
_async, _sender, _egw)
{
// Copy the parameters
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this.url = _egw.ajaxUrl(_menuaction);
this.parameters = _parameters ? _parameters : [];
this.async = _async ? _async : false;
this.callback = _callback ? _callback : null;
this.context = _context ? _context : null;
this.sender = _sender ? _sender : null;
this.egw = _egw;
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// We currently don't have a request object
this.request = null;
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// Some variables needed for notification about a JS files done loading
this.onLoadFinish = null;
this.jsFiles = 0;
this.jsCount = 0;
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// Function which is currently used to display alerts -- may be replaced by
// some API function.
this.alertHandler = function(_message, _details) {
alert(_message);
if (_details)
{
_egw.debug('info', _message, _details);
}
};
}
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json_request.prototype.sendRequest = function() {
// Assemble the complete request
var request_obj = {
'json_data': this.egw.jsonEncode({
'request': {
'parameters': this.parameters
}
})
};
// Send the request via AJAX using the jquery ajax function
$j.ajax({
url: this.url,
async: this.async,
context: this,
data: request_obj,
dataType: 'json',
type: 'POST',
success: this.handleResponse,
error: function(_xmlhttp, _err) {
this.egw.debug('error', 'Ajax request to', this.url, ' failed:',
_err);
}
});
}
json_request.prototype.handleResponse = function(data) {
if (data && data.response)
{
for (var i = 0; i < data.response.length; i++)
{
// Get the response object
var res = data.response[i];
// Check whether a plugin for the given type exists
if (typeof plugins[res.type] !== 'undefined')
{
for (var j = 0; j < plugins[res.type].length; j++) {
try {
// Get a reference to the plugin
var plugin = plugins[res.type][j];
// Call the plugin callback
plugin.callback.call(
plugin.context ? plugin.context : this.context,
res.type, res, this
);
} catch(e) {
var msg = e.message ? e.message : e + '';
var stack = e.stack ? "\n-- Stack trace --\n" + e.stack : ""
this.egw.debug('error', 'Exception "' + msg + '" while handling JSON response type "' + res.type + '", plugin', plugin, 'response', res, stack);
}
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}
}
}
}
}
var json = {
/** The constructor of the egw_json_request class.
*
* @param _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 _parameters which should be passed to the menuaction function.
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* @param _async specifies whether the request should be asynchronous or
* not.
* @param _callback specifies the callback function which should be
* called, once the request has been sucessfully executed.
* @param _context is the context which will be used for the callback function
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* @param _sender is a parameter being passed to the _callback function
*/
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json: function(_menuaction, _parameters, _callback, _context, _async,
_sender)
{
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return new json_request(_menuaction, _parameters, _callback,
_context, _async, _sender, this);
},
/**
* Registers a new handler plugin.
*
* @param _callback is the callback function which should be called
* whenever a response is comming from the server.
* @param _context is the context in which the callback function should
* be called. If null is given, the plugin is executed in the context
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* of the request object context.
* @param _type is an optional parameter defaulting to 'global'.
* it describes the response type which this plugin should be
* handling.
*/
registerJSONPlugin: function(_callback, _context, _type)
{
// _type defaults to 'global'
if (typeof _type === 'undefined')
{
_type = 'global';
}
// Create an array for the given category inside the plugins object
if (typeof plugins[_type] === 'undefined')
{
plugins[_type] = [];
}
// Add the entry
plugins[_type].push({
'callback': _callback,
'context': _context,
});
},
/**
* Removes a previously registered plugin.
*
* @param _callback is the callback function which should be called
* whenever a response is comming from the server.
* @param _context is the context in which the callback function should
* be called.
* @param _type is an optional parameter defaulting to 'global'.
* it describes the response type which this plugin should be
* handling.
*/
unregisterJSONPlugin: function(_callback, _context, _type)
{
// _type defaults to 'global'
if (typeof _type === 'undefined')
{
_type = 'global';
}
if (typeof plugins[_type] !== 'undefined') {
for (var i = 0; i < plugins[_type].length; i++)
{
if (plugins[_type][i].callback == _callback &&
plugins[_type][i].context == _context)
{
plugins[_type].slice(i, 1);
break;
}
}
}
}
};
// Regisert the "alert" plugin
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json.registerJSONPlugin(function(type, res, req) {
//Check whether all needed parameters have been passed and call the alertHandler function
if ((typeof res.data.message != 'undefined') &&
(typeof res.data.details != 'undefined'))
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{
req.alertHandler(
res.data.message,
res.data.details)
return true;
}
throw 'Invalid parameters';
}, null, 'alert');
// Register the "assign" plugin
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json.registerJSONPlugin(function(type, res, req) {
//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'))
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{
var obj = document.getElementById(res.data.id);
if (obj)
{
obj[res.data.key] = res.data.value;
if (res.data.key == "innerHTML")
{
egw_insertJS(res.data.value);
}
return true;
}
return false;
}
throw 'Invalid parameters';
}, null, 'assign');
// Register the "data" plugin
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json.registerJSONPlugin(function(type, res, req) {
//Callback the caller in order to allow him to handle the data
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if (req.callback)
{
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req.callback.call(req.sender, res.data);
return true;
}
}, null, 'data');
// Register the "script" plugin
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json.registerJSONPlugin(function(type, res, req) {
if (typeof res.data == 'string')
{
try
{
var func = new Function(res.data);
func.call(window);
}
catch (e)
{
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req.egw.debug('error', 'Error while executing script: ',
res.data)
}
return true;
}
throw 'Invalid parameters';
}, null, 'script');
// Register the "apply" plugin
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json.registerJSONPlugin(function(type, res, req) {
if (typeof res.data.func == 'string' &&
typeof window[res.data.func] == 'function')
{
try
{
window[res.data.func].apply(window, res.data.parms);
}
catch (e)
{
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req.egw.debug('error', 'Function', res.data.func,
'Parameters', res.data.parms);
}
return true;
}
throw 'Invalid parameters';
}, null, 'apply');
// Register the "jquery" plugin
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json.registerJSONPlugin(function(type, res, req) {
if (typeof res.data.select == 'string' &&
typeof res.data.func == 'string')
{
try
{
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var jQueryObject = $j(res.data.select, req.context);
jQueryObject[res.data.func].apply(jQueryObject, res.data.parms);
}
catch (e)
{
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req.egw.debug('error', 'Function', res.data.func,
'Parameters', res.data.parms);
}
return true;
}
throw 'Invalid parameters';
}, null, 'jquery');
// Register the "redirect" plugin
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json.registerJSONPlugin(function(type, res, req) {
//console.log(res.data.url);
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
{
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egw_appWindowOpen(req.app, res.data.url);
}
return true;
}
throw 'Invalid parameters';
}, null, 'redirect');
// Register the 'css' plugin
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json.registerJSONPlugin(function(type, res, req) {
if (typeof res.data == 'string')
{
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req.egw.includeCSS(res.data);
return true;
}
throw 'Invalid parameters';
}, null, 'css');
// Register the 'js' plugin
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json.registerJSONPlugin(function(type, res, req) {
if (typeof res.data == 'string')
{
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req.jsCount++;
req.egw.includeJS(res.data, function() {
req.jsFiles++;
if (req.jsFiles == req.jsCount && req.onLoadFinish)
{
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req.onLoadFinish.call(req.sender);
}
});
}
throw 'Invalid parameters';
}, null, 'js');
// Register the 'html' plugin, replacing document content with send html
json.registerJSONPlugin(function(type, res, req) {
if (typeof res.data == 'string')
{
// Empty the document tree
while (_wnd.document.childNodes.length > 0)
{
_wnd.document.removeChild(_wnd.document.childNodes[0]);
}
// Write the given content
_wnd.document.write(res.data);
// Close the document
_wnd.document.close();
}
throw 'Invalid parameters';
}, null, 'html');
// Return the extension
return json;
});