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define(["../text/format"], function (format) {
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'use strict';
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var listeners = [];
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var channels = {};
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var Trace = function (name) {
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this.name = name;
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this._subscribers = [];
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};
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Trace.prototype.debug = function () {
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if (Trace.level >= 4)
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this.notify("debug", format.apply(null, arguments));
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};
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Trace.prototype.log = function () {
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if (Trace.level >= 3)
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this.notify("log", format.apply(null, arguments));
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};
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Trace.prototype.warn = function () {
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if (Trace.level >= 2)
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this.notify("warn", format.apply(null, arguments));
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};
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Trace.prototype.error = function () {
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if (Trace.level >= 1)
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this.notify("error", format.apply(null, arguments));
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};
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Trace.prototype.notify = function (name, msg) {
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var me = this;
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me._subscribers.forEach(function (cb) {
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cb(me, name, msg);
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});
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};
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Trace.prototype.subscribe = function (cb) {
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this._subscribers.push(cb);
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};
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Trace.prototype.toString = function () {
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return this.name;
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};
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Trace.createChannel = function (type, name, cb) {
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var chId = name;
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if (channels[chId])
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return channels[chId];
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var channel = new type(chId);
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channels[chId] = channel;
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Trace._onNewChannel(chId, channel);
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cb(channel);
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};
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Trace._onNewChannel = function (chId, ch) {
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listeners.forEach(function (listener) {
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listener(chId, ch);
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});
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};
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Trace.on = function (filter, cb) {
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if (arguments.length == 1) {
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cb = filter;
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filter = undefined;
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}
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var d, test;
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if (filter instanceof RegExp) {
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test = function (chId) {
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return filter.test(chId);
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};
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} else if (filter instanceof Function) {
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test = filter;
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} else if (filter) {
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test = function (chId) {
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return chId == filter;
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};
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}
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if (test) {
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d = function(chId, ch) {
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if(test(chId))
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ch.subscribe(cb);
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};
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} else {
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d = function(chId, ch) {
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ch.subscribe(cb);
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};
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}
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listeners.push(d);
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for(var chId in channels)
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d(chId,channels[chId]);
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};
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Trace.load = function (id, require, cb) {
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if (id)
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Trace.createChannel(Trace, id, cb);
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else if (require.module && require.module.mid)
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Trace.createChannel(Trace, require.module.mid, cb);
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else
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require(['module'], function (module) {
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Trace.createChannel(Trace, module && module.id, cb);
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});
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};
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Trace.dynamic = true;
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Trace.level = 4;
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return Trace;
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});
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