forked from extern/egroupware
394 lines
10 KiB
JavaScript
394 lines
10 KiB
JavaScript
/**
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* EGroupware clientside API object
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*
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package etemplate
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* @subpackage api
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* @link http://www.egroupware.org
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* @author Andreas Stöckel (as AT stylite.de)
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* @author Ralf Becker <RalfBecker@outdoor-training.de>
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* @version $Id$
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*/
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"use strict";
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/*egw:uses
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jquery.jquery;
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egw_core;
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egw_utils;
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egw_files;
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egw_debug;
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*/
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egw.extend('json', egw.MODULE_WND_LOCAL, function(_app, _wnd) {
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/**
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* Object which contains all registered handlers for JS responses.
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* The handlers are organized per response type in the top level of the
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* object, where each response type can have an array of handlers attached
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* to it.
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*/
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var plugins = {};
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/**
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* Internal implementation of the JSON request object.
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*/
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function json_request(_menuaction, _parameters, _callback, _context,
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_async, _sender, _egw)
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{
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// Copy the parameters
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this.url = _egw.ajaxUrl(_menuaction);
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this.parameters = _parameters ? _parameters : [];
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this.async = _async ? _async : false;
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this.callback = _callback ? _callback : null;
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this.context = _context ? _context : null;
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this.sender = _sender ? _sender : null;
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this.egw = _egw;
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// We currently don't have a request object
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this.request = null;
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// Some variables needed for notification about a JS files done loading
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this.onLoadFinish = null;
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this.jsFiles = 0;
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this.jsCount = 0;
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// Function which is currently used to display alerts -- may be replaced by
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// some API function.
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this.alertHandler = function(_message, _details) {
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alert(_message);
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if (_details)
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{
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_egw.debug('info', _message, _details);
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}
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};
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}
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json_request.prototype.sendRequest = function() {
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// Assemble the complete request
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var request_obj = {
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'json_data': this.egw.jsonEncode({
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'request': {
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'parameters': this.parameters
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}
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})
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};
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// Send the request via AJAX using the jquery ajax function
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$j.ajax({
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url: this.url,
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async: this.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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error: function(_xmlhttp, _err) {
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this.egw.debug('error', 'Ajax request to', this.url, ' failed:',
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_err);
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}
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});
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}
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json_request.prototype.handleResponse = function(data) {
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if (data && data.response)
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{
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for (var i = 0; i < data.response.length; i++)
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{
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// Get the response object
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var res = data.response[i];
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// Check whether a plugin for the given type exists
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if (typeof plugins[res.type] !== 'undefined')
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{
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for (var j = 0; j < plugins[res.type].length; j++) {
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try {
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// Get a reference to the plugin
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var plugin = plugins[res.type][j];
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// Call the plugin callback
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plugin.callback.call(
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plugin.context ? plugin.context : this.context,
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res.type, res, this
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);
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} catch(e) {
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var msg = e.message ? e.message : e + '';
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var stack = e.stack ? "\n-- Stack trace --\n" + e.stack : ""
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this.egw.debug('error', 'Exception "' + msg + '" while handling JSON response type "' + res.type + '", plugin', plugin, 'response', res, stack);
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}
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}
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}
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}
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}
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}
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var json = {
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/** The constructor of the egw_json_request class.
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*
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* @param _menuaction the menuaction function which should be called and
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* which handles the actual request. If the menuaction is a full featured
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* url, this one will be used instead.
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* @param _parameters which should be passed to the menuaction function.
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* @param _async specifies whether the request should be asynchronous or
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* not.
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* @param _callback specifies the callback function which should be
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* called, once the request has been sucessfully executed.
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* @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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*/
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json: function(_menuaction, _parameters, _callback, _context, _async,
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_sender)
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{
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return new json_request(_menuaction, _parameters, _callback,
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_context, _async, _sender, this);
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},
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/**
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* Registers a new handler plugin.
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*
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* @param _callback is the callback function which should be called
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* whenever a response is comming from the server.
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* @param _context is the context in which the callback function should
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* be called. If null is given, the plugin is executed in the context
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* of the request object context.
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* @param _type is an optional parameter defaulting to 'global'.
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* it describes the response type which this plugin should be
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* handling.
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*/
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registerJSONPlugin: function(_callback, _context, _type)
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{
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// _type defaults to 'global'
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if (typeof _type === 'undefined')
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{
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_type = 'global';
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}
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// Create an array for the given category inside the plugins object
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if (typeof plugins[_type] === 'undefined')
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{
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plugins[_type] = [];
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}
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// Add the entry
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plugins[_type].push({
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'callback': _callback,
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'context': _context,
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});
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},
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/**
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* Removes a previously registered plugin.
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*
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* @param _callback is the callback function which should be called
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* whenever a response is comming from the server.
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* @param _context is the context in which the callback function should
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* be called.
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* @param _type is an optional parameter defaulting to 'global'.
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* it describes the response type which this plugin should be
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* handling.
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*/
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unregisterJSONPlugin: function(_callback, _context, _type)
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{
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// _type defaults to 'global'
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if (typeof _type === 'undefined')
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{
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_type = 'global';
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}
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if (typeof plugins[_type] !== 'undefined') {
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for (var i = 0; i < plugins[_type].length; i++)
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{
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if (plugins[_type][i].callback == _callback &&
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plugins[_type][i].context == _context)
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{
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plugins[_type].slice(i, 1);
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break;
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}
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}
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}
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}
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};
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// Regisert the "alert" plugin
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json.registerJSONPlugin(function(type, res, req) {
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//Check whether all needed parameters have been passed and call the alertHandler function
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if ((typeof res.data.message != 'undefined') &&
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(typeof res.data.details != 'undefined'))
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{
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req.alertHandler(
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res.data.message,
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res.data.details)
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return true;
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}
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throw 'Invalid parameters';
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}, null, 'alert');
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// Register the "assign" plugin
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json.registerJSONPlugin(function(type, res, req) {
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//Check whether all needed parameters have been passed and call the alertHandler function
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if ((typeof res.data.id != 'undefined') &&
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(typeof res.data.key != 'undefined') &&
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(typeof res.data.value != 'undefined'))
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{
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var obj = document.getElementById(res.data.id);
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if (obj)
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{
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obj[res.data.key] = res.data.value;
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if (res.data.key == "innerHTML")
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{
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egw_insertJS(res.data.value);
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}
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return true;
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}
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return false;
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}
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throw 'Invalid parameters';
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}, null, 'assign');
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// Register the "data" plugin
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json.registerJSONPlugin(function(type, res, req) {
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//Callback the caller in order to allow him to handle the data
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if (req.callback)
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{
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req.callback.call(req.sender, res.data);
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return true;
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}
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}, null, 'data');
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// Register the "script" plugin
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json.registerJSONPlugin(function(type, res, req) {
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if (typeof res.data == 'string')
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{
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try
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{
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var func = new Function(res.data);
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func.call(window);
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}
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catch (e)
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{
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req.egw.debug('error', 'Error while executing script: ',
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res.data)
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}
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return true;
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}
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throw 'Invalid parameters';
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}, null, 'script');
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// Register the "apply" plugin
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json.registerJSONPlugin(function(type, res, req) {
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if (typeof res.data.func == 'string' &&
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typeof window[res.data.func] == 'function')
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{
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try
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{
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window[res.data.func].apply(window, res.data.parms);
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}
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catch (e)
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{
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req.egw.debug('error', 'Function', res.data.func,
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'Parameters', res.data.parms);
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}
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return true;
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}
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throw 'Invalid parameters';
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}, null, 'apply');
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// Register the "jquery" plugin
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json.registerJSONPlugin(function(type, res, req) {
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if (typeof res.data.select == 'string' &&
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typeof res.data.func == 'string')
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{
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try
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{
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var jQueryObject = $j(res.data.select, req.context);
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jQueryObject[res.data.func].apply(jQueryObject, res.data.parms);
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}
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catch (e)
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{
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req.egw.debug('error', 'Function', res.data.func,
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'Parameters', res.data.parms);
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}
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return true;
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}
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throw 'Invalid parameters';
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}, null, 'jquery');
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// Register the "redirect" plugin
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json.registerJSONPlugin(function(type, res, req) {
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//console.log(res.data.url);
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if (typeof res.data.url == 'string' &&
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typeof res.data.global == 'boolean')
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{
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//Special handling for framework reload
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res.data.global |= (res.data.url.indexOf("?cd=10") > 0);
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if (res.data.global)
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{
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egw_topWindow().location.href = res.data.url;
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}
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else
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{
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egw_appWindowOpen(req.app, res.data.url);
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}
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return true;
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}
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throw 'Invalid parameters';
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}, null, 'redirect');
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// Register the 'css' plugin
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json.registerJSONPlugin(function(type, res, req) {
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if (typeof res.data == 'string')
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{
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req.egw.includeCSS(res.data);
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return true;
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}
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throw 'Invalid parameters';
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}, null, 'css');
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// Register the 'js' plugin
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json.registerJSONPlugin(function(type, res, req) {
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if (typeof res.data == 'string')
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{
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req.jsCount++;
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req.egw.includeJS(res.data, function() {
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req.jsFiles++;
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if (req.jsFiles == req.jsCount && req.onLoadFinish)
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{
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req.onLoadFinish.call(req.sender);
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}
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});
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}
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throw 'Invalid parameters';
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}, null, 'js');
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// Register the 'html' plugin, replacing document content with send html
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json.registerJSONPlugin(function(type, res, req) {
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if (typeof res.data == 'string')
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{
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// Empty the document tree
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while (_wnd.document.childNodes.length > 0)
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{
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_wnd.document.removeChild(_wnd.document.childNodes[0]);
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}
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// Write the given content
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_wnd.document.write(res.data);
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// Close the document
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_wnd.document.close();
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}
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throw 'Invalid parameters';
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}, null, 'html');
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// Return the extension
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return json;
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});
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