141 lines
3.7 KiB
JavaScript
141 lines
3.7 KiB
JavaScript
window.MessageBus = (function() {
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var callbacks, clientId, failCount, interval, isHidden, queue, responseCallbacks, uniqueId;
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uniqueId = function() {
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return 'xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
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var r, v;
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r = Math.random() * 16 | 0;
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v = c === 'x' ? r : r & 0x3 | 0x8;
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return v.toString(16);
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});
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};
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clientId = uniqueId();
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responseCallbacks = {};
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callbacks = [];
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queue = [];
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interval = null;
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failCount = 0;
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isHidden = function() {
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if (document.hidden !== void 0) {
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return document.hidden;
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} else if (document.webkitHidden !== void 0) {
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return document.webkitHidden;
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} else if (document.msHidden !== void 0) {
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return document.msHidden;
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} else if (document.mozHidden !== void 0) {
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return document.mozHidden;
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} else {
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return !document.hasFocus;
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}
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};
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var processMessages = function(messages) {
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failCount = 0;
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$.each(messages,function(idx,message) {
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gotData = true;
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$.each(callbacks,function(idx,callback) {
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if (callback.channel === message.channel) {
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callback.last_id = message.message_id;
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callback.func(message.data);
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}
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if (message.channel === "/__status") {
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if (message.data[callback.channel] !== void 0) {
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callback.last_id = message.data[callback.channel];
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}
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}
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});
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});
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};
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return {
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enableLongPolling: true,
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callbackInterval: 60000,
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maxPollInterval: 3 * 60 * 1000,
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callbacks: callbacks,
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clientId: clientId,
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stop: false,
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start: function(opts) {
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var poll,
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_this = this;
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if (opts === null) {
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opts = {};
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}
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poll = function() {
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var data, gotData;
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if (callbacks.length === 0) {
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setTimeout(poll, 500);
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return;
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}
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data = {};
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$.each(callbacks, function(idx,c) {
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return data[c.channel] = c.last_id === void 0 ? -1 : c.last_id;
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});
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gotData = false;
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return _this.longPoll = $.ajax("/message-bus/" + clientId + "/poll?" + (isHidden() || !_this.enableLongPolling ? "dlp=t" : ""), {
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data: data,
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cache: false,
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dataType: 'json',
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type: 'POST',
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headers: {
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'X-SILENCE-LOGGER': 'true'
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},
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success: function(messages) {
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processMessages(messages);
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},
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error: failCount += 1,
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complete: function() {
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if (gotData) {
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setTimeout(poll, 100);
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} else {
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interval = _this.callbackInterval;
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if (failCount > 2) {
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interval = interval * failCount;
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} else if (isHidden()) {
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interval = interval * 4;
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}
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if (interval > _this.maxPollInterval) {
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interval = _this.maxPollInterval;
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}
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setTimeout(poll, interval);
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}
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_this.longPoll = null;
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}
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});
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};
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poll();
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},
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subscribe: function(channel, func, lastId) {
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callbacks.push({
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channel: channel,
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func: func,
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last_id: lastId
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});
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if (this.longPoll) {
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return this.longPoll.abort();
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}
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},
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unsubscribe: function(channel) {
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var glob;
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if (channel.endsWith("*")) {
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channel = channel.substr(0, channel.length - 1);
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glob = true;
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}
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callbacks = callbacks.filter(function(callback) {
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if (glob) {
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return callback.channel.substr(0, channel.length) !== channel;
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} else {
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return callback.channel !== channel;
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}
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});
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if (this.longPoll) {
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return this.longPoll.abort();
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}
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}
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};
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})();
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