36 lines
1.0 KiB
JavaScript
36 lines
1.0 KiB
JavaScript
// Wake detector - notices when something (such as
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// suspension/sleeping!) has caused periodic activities to be
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// interrupted, and warns others about it
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// Inspired by http://blog.alexmaccaw.com/javascript-wake-event
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var Minimart = require("./minimart.js");
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var World = Minimart.World;
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var sub = Minimart.sub;
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var pub = Minimart.pub;
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var __ = Minimart.__;
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var _$ = Minimart._$;
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function WakeDetector(period) {
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this.message = "wake";
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this.period = period || 10000;
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this.mostRecentTrigger = +(new Date());
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this.timerId = null;
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}
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WakeDetector.prototype.boot = function () {
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var self = this;
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World.updateRoutes([pub(this.message)]);
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this.timerId = setInterval(World.wrap(function () { self.trigger(); }), this.period);
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};
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WakeDetector.prototype.handleEvent = function (e) {};
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WakeDetector.prototype.trigger = function () {
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var now = +(new Date());
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if (now - this.mostRecentTrigger > this.period * 1.5) {
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World.send(this.message);
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}
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this.mostRecentTrigger = now;
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};
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module.exports.WakeDetector = WakeDetector;
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