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TiddlyWiki5/core/modules/utils/logger.js
Jermolene 550ad4a1a9 Partial fix for #1570
Stop the logger from creating alert tiddlers on the server. They
propagate to the client but are not deletable from the client because
they are in the `$:/temp` namespace.

cc @loleg
2015-03-12 22:35:03 +00:00

81 lines
2.1 KiB
JavaScript

/*\
title: $:/core/modules/utils/logger.js
type: application/javascript
module-type: utils
A basic logging implementation
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var ALERT_TAG = "$:/tags/Alert";
/*
Make a new logger
*/
function Logger(componentName) {
this.componentName = componentName || "";
}
/*
Log a message
*/
Logger.prototype.log = function(/* args */) {
if(console !== undefined && console.log !== undefined) {
return Function.apply.call(console.log, console, [this.componentName + ":"].concat(Array.prototype.slice.call(arguments,0)));
}
};
/*
Alert a message
*/
Logger.prototype.alert = function(/* args */) {
// Prepare the text of the alert
var text = Array.prototype.join.call(arguments," ");
// Create alert tiddlers in the browser
if($tw.browser) {
// Check if there is an existing alert with the same text and the same component
var existingAlerts = $tw.wiki.getTiddlersWithTag(ALERT_TAG),
alertFields,
existingCount,
self = this;
$tw.utils.each(existingAlerts,function(title) {
var tiddler = $tw.wiki.getTiddler(title);
if(tiddler.fields.text === text && tiddler.fields.component === self.componentName && tiddler.fields.modified && (!alertFields || tiddler.fields.modified < alertFields.modified)) {
alertFields = $tw.utils.extend({},tiddler.fields);
}
});
if(alertFields) {
existingCount = alertFields.count || 1;
} else {
alertFields = {
title: $tw.wiki.generateNewTitle("$:/temp/alerts/alert",{prefix: ""}),
text: text,
tags: [ALERT_TAG],
component: this.componentName
};
existingCount = 0;
}
alertFields.modified = new Date();
if(++existingCount > 1) {
alertFields.count = existingCount;
} else {
alertFields.count = undefined;
}
$tw.wiki.addTiddler(new $tw.Tiddler(alertFields));
// Log the alert as well
this.log.apply(this,Array.prototype.slice.call(arguments,0));
} else {
// Print an orange message to the console if not in the browser
console.error("\x1b[1;33m" + text + "\x1b[0m");
}
};
exports.Logger = Logger;
})();