egroupware/api/js/jsapi/egw_debug.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 $Id$
*/
/*egw:uses
egw_core;
*/
/**
* Log debug messages to browser console and persistent html5 localStorage
*
* localStorage is limited by a clientside quota, so we need to deal with
* situation that storing something in localStorage will throw an exception!
*
* @param {string} _app
* @param {object} _wnd
*/
egw.extend('debug', egw.MODULE_GLOBAL, function(_app, _wnd)
{
"use strict";
/**
* DEBUGLEVEL specifies which messages are printed to the console.
* Decrease the value of EGW_DEBUGLEVEL to get less messages.
*
* @type Number
* 0 = off, no logging
* 1 = only "error"
* 2 = -- " -- plus "warning"
* 3 = -- " -- plus "info"
* 4 = -- " -- plus "log"
* 5 = -- " -- plus a stacktrace
*/
var DEBUGLEVEL = 3;
/**
* Log-level for local storage and error-display in GUI
*
* @type Number
* 0 = off, no logging AND no global error-handler bound
* 1 = ... see above
*/
var LOCAL_LOG_LEVEL = 0;
/**
* Number of log-entries stored on client, new errors overwrite old ones
*
* @type Number
*/
var MAX_LOGS = 200;
/**
* Number of last old log entry = next one to overwrite
*
* @type String
*/
var LASTLOG = 'lastLog';
/**
* Prefix for key of log-message, message number gets appended to it
*
* @type String
*/
var LOG_PREFIX = 'log_';
/**
* Log to clientside html5 localStorage
*
* @param {String} _level "navigation", "log", "info", "warn", "error"
* @param {Array} _args arguments to egw.debug
* @param {string} _stack
* @returns {Boolean} false if localStorage is NOT supported, null if level requires no logging, true if logged
*/
function log_on_client(_level, _args, _stack)
{
if (!window.localStorage) return false;
switch(_level)
{
case 'warn':
if (LOCAL_LOG_LEVEL < 2) return null;
case 'info':
if (LOCAL_LOG_LEVEL < 3) return null;
case 'log':
if (LOCAL_LOG_LEVEL < 4) return null;
default:
if (!LOCAL_LOG_LEVEL) return null;
}
var data = {
time: (new Date()).getTime(),
level: _level,
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args: _args
};
// Add in a trace, if no navigation _level
if (_level != 'navigation')
{
if (_stack)
{
data.stack = _stack;
}
else
{
// IE needs to throw the error to get a stack trace!
try {
throw new Error;
}
catch(error) {
data.stack = error.stack;
}
}
}
if (typeof window.localStorage[LASTLOG] == 'undefined')
{
window.localStorage[LASTLOG] = 0;
}
// check if MAX_LOGS changed in code --> clear whole log
if (window.localStorage[LASTLOG] > MAX_LOGS)
{
clear_client_log();
}
try {
window.localStorage[LOG_PREFIX+window.localStorage[LASTLOG]] = JSON.stringify(data);
window.localStorage[LASTLOG] = (1 + parseInt(window.localStorage[LASTLOG])) % MAX_LOGS;
}
catch(e) {
switch (e.name)
{
case 'QuotaExceededError': // storage quota is exceeded --> delete whole log
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case 'NS_ERROR_DOM_QUOTA_REACHED': // FF-name
clear_client_log();
break;
default:
// one of the args is not JSON.stringify, because it contains circular references eg. an et2 widget
for(var i=0; i < data.args.length; ++i)
{
try {
JSON.stringify(data.args[i]);
}
catch(e) {
// for Class we try removing _parent and _children attributes and try again to stringify
if (data.args[i] instanceof Class)
{
data.args[i] = jQuery.extend({}, data.args[i]);
delete data.args[i]._parent;
delete data.args[i]._children;
try {
JSON.stringify(data.args[i]);
continue; // stringify worked --> check other arguments
}
catch(e) {
// ignore error and remove whole argument
}
}
// if above doesnt work, we remove the attribute
data.args[i] = '** removed, circular reference **';
}
}
}
try {
window.localStorage[LOG_PREFIX+window.localStorage[LASTLOG]] = JSON.stringify(data);
window.localStorage[LASTLOG] = (1 + parseInt(window.localStorage[LASTLOG])) % MAX_LOGS;
}
catch(e) {
// ignore error, if eg. localStorage exceeds quota on client
}
}
}
/**
* Get log from localStorage with oldest message first
*
* @returns {Array} of Object with values for attributes level, message, trace
*/
function get_client_log()
{
var logs = [];
if (window.localStorage && typeof window.localStorage[LASTLOG] != 'undefined')
{
var lastlog = parseInt(window.localStorage[LASTLOG]);
for(var i=lastlog; i < lastlog+MAX_LOGS; ++i)
{
var log = window.localStorage[LOG_PREFIX+(i%MAX_LOGS)];
if (typeof log != 'undefined')
{
try {
logs.push(JSON.parse(log));
}
catch(e) {
// ignore not existing log entries
}
}
}
}
return logs;
}
/**
* Clears whole client log
*/
function clear_client_log()
{
// Remove indicator icon
jQuery('#topmenu_info_error').remove();
if (!window.localStorage) return false;
var max = MAX_LOGS;
// check if we have more log entries then allowed, happens if MAX_LOGS get changed in code
if (window.localStorage[LASTLOG] > MAX_LOGS)
{
max = 1000; // this should NOT be changed, if MAX_LOGS get's smaller!
}
for(var i=0; i < max; ++i)
{
if (typeof window.localStorage[LOG_PREFIX+i] != 'undefined')
{
delete window.localStorage[LOG_PREFIX+i];
}
}
delete window.localStorage[LASTLOG];
return true;
}
/**
* Format one log message for display
*
* @param {Object} log {{level: string, time: number, stack: string, args: array[]}} Log information
* Actual message is in args[0]
* @returns {DOMNode}
*/
function format_message(log)
{
var row = document.createElement('tr');
row.setAttribute('class', log.level);
var timestamp = row.insertCell(-1);
timestamp.appendChild(document.createTextNode(new Date(log.time)));
timestamp.setAttribute('class', 'timestamp');
var level = row.insertCell(-1);
level.appendChild(document.createTextNode(log.level));
level.setAttribute('class', 'level');
var message = row.insertCell(-1);
for(var i = 0; i < log.args.length; i++)
{
var arg = document.createElement('p');
arg.appendChild(
document.createTextNode(typeof log.args[i] == 'string' ? log.args[i] : JSON.stringify( log.args[i]))
);
message.appendChild(arg);
}
var stack = row.insertCell(-1);
stack.appendChild(document.createTextNode(log.stack||''));
stack.setAttribute('class','stack');
return row;
}
/**
* Show user an error happend by displaying a clickable icon with tooltip of current error
*/
function raise_error()
{
var icon = jQuery('#topmenu_info_error');
if (!icon.length)
{
var icon = jQuery(egw(_wnd).image_element(egw.image('dialog_error')));
icon.addClass('topmenu_info_item').attr('id', 'topmenu_info_error');
// ToDo: tooltip
icon.on('click', egw(_wnd).show_log);
jQuery('#egw_fw_topmenu_info_items,#topmenu_info').append(icon);
}
}
// bind to global error handler, only if LOCAL_LOG_LEVEL > 0
if (LOCAL_LOG_LEVEL)
{
jQuery(_wnd).on('error', function(e)
{
// originalEvent does NOT always exist in IE
var event = typeof e.originalEvent == 'object' ? e.originalEvent : e;
// IE(11) gives a syntaxerror on each pageload pointing to first line of html page (doctype).
// As I cant figure out what's wrong there, we are ignoring it for now.
if (navigator.userAgent.match(/Trident/i) && typeof event.name == 'undefined' &&
Object.prototype.toString.call(event) == '[object ErrorEvent]' &&
event.lineno == 1 && event.filename.indexOf('/index.php') != -1)
{
return false;
}
log_on_client('error', [event.message], typeof event.stack != 'undefined' ? event.stack : null);
raise_error();
// rethrow error to let browser log and show it in usual way too
if (typeof event.error == 'object')
{
throw event.error;
}
throw event.message;
});
}
/**
* The debug function can be used to send a debug message to the
* java script console. The first parameter specifies the debug
* level, all other parameters are passed to the corresponding
* console function.
*/
return {
debug_level: function() {
return DEBUGLEVEL;
},
debug: function(_level) {
if (typeof _wnd.console != "undefined")
{
// Get the passed parameters and remove the first entry
var args = [];
for (var i = 1; i < arguments.length; i++)
{
args.push(arguments[i]);
}
// Add in a trace
if (DEBUGLEVEL >= 5 && typeof (new Error).stack != "undefined")
{
var stack = (new Error).stack;
args.push(stack);
}
if (_level == "log" && DEBUGLEVEL >= 4 &&
typeof _wnd.console.log == "function")
{
_wnd.console.log.apply(_wnd.console, args);
}
if (_level == "info" && DEBUGLEVEL >= 3 &&
typeof _wnd.console.info == "function")
{
_wnd.console.info.apply(_wnd.console, args);
}
if (_level == "warn" && DEBUGLEVEL >= 2 &&
typeof _wnd.console.warn == "function")
{
_wnd.console.warn.apply(_wnd.console, args);
}
if (_level == "error" && DEBUGLEVEL >= 1 &&
typeof _wnd.console.error == "function")
{
_wnd.console.error.apply(_wnd.console, args);
}
}
// raise errors to user, if LOCAL_LOG_LEVEL > 0
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if (LOCAL_LOG_LEVEL && _level == "error") raise_error(args);
// log to html5 localStorage
if (typeof stack != 'undefined') args.pop(); // remove stacktrace again
log_on_client(_level, args);
},
/**
* Display log to user because he clicked on icon showed by raise_error
*
* @returns {undefined}
*/
show_log: function()
{
var table = document.createElement('table');
var body = document.createElement('tbody');
var client_log = get_client_log();
for(var i = 0; i < client_log.length; i++)
{
body.appendChild(format_message(client_log[i]));
}
table.appendChild(body);
// Use a wrapper div for ease of styling
var wrapper = document.createElement('div');
wrapper.setAttribute('class', 'client_error_log');
wrapper.appendChild(table);
if(window.jQuery && window.jQuery.ui.dialog)
{
var $wrapper = jQuery(wrapper);
// Start hidden
jQuery('tr',$wrapper).addClass('hidden')
.on('click', function() {
jQuery(this).toggleClass('hidden',{});
jQuery(this).find('.stack').children().toggleClass('ui-icon ui-icon-circle-plus');
});
// Wrap in div so we can control height
jQuery('td',$wrapper).wrapInner('<div/>')
.filter('.stack').children().addClass('ui-icon ui-icon-circle-plus');
$wrapper.dialog({
title: egw.lang('Error log'),
buttons: [
{text: egw.lang('OK'), click: function() {jQuery(this).dialog( "close" ); }},
{text: egw.lang('clear'), click: function() {clear_client_log(); jQuery(this).empty();}}
],
width: 800,
height: 400
});
$wrapper[0].scrollTop = $wrapper[0].scrollHeight;
}
if (_wnd.console) _wnd.console.log(get_client_log());
}
};
});