n8n
Version:
n8n Workflow Automation Tool
37 lines • 1.37 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.SlidingWindowSignal = void 0;
class SlidingWindowSignal {
constructor(eventEmitter, eventName, opts = {}) {
this.eventEmitter = eventEmitter;
this.eventName = eventName;
this.lastSignal = null;
this.lastSignalTime = 0;
const { windowSizeInMs = 500 } = opts;
this.windowSizeInMs = windowSizeInMs;
eventEmitter.on(eventName, (signal) => {
this.lastSignal = signal;
this.lastSignalTime = Date.now();
});
}
async getSignal() {
const timeSinceLastEvent = Date.now() - this.lastSignalTime;
if (timeSinceLastEvent <= this.windowSizeInMs)
return this.lastSignal;
return await new Promise((resolve) => {
let timeoutTimerId = null;
const onExit = (signal) => {
if (timeoutTimerId)
clearTimeout(timeoutTimerId);
resolve(signal);
};
timeoutTimerId = setTimeout(() => {
this.eventEmitter.off(this.eventName, onExit);
resolve(null);
});
this.eventEmitter.once(this.eventName, onExit);
});
}
}
exports.SlidingWindowSignal = SlidingWindowSignal;
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