/*
 * decaffeinate suggestions:
 * DS101: Remove unnecessary use of Array.from
 * DS102: Remove unnecessary code created because of implicit returns
 * DS103: Rewrite code to no longer use __guard__
 * DS205: Consider reworking code to avoid use of IIFEs
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const app = require('../../../../app');
require("logger-sharelatex");
const logger = require("logger-sharelatex");
const Settings = require("settings-sharelatex");

module.exports = {
	running: false,
	initing: false,
	callbacks: [],
	ensureRunning(callback) {
		if (callback == null) { callback = function(error) {}; }
		if (this.running) {
			return callback();
		} else if (this.initing) {
			return this.callbacks.push(callback);
		} else {
			this.initing = true;
			this.callbacks.push(callback);
			return app.listen(__guard__(Settings.internal != null ? Settings.internal.trackchanges : undefined, x => x.port), "localhost", error => { 
				if (error != null) { throw error; }
				this.running = true;
				logger.log("track changes running in dev mode");

				return (() => {
					const result = [];
					for (callback of Array.from(this.callbacks)) {
						result.push(callback());
					}
					return result;
				})();
			});
		}
	}
};
function __guard__(value, transform) {
  return (typeof value !== 'undefined' && value !== null) ? transform(value) : undefined;
}