logger-timer/dist/LoggerTimer.js

A quick shortcut to adding a bunch of timers and dumping their deltas.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.LoggerTimer = void 0;
class LoggerTimer {
    timerStarts = {};
    timerStops = {};
    // used to toggler if this loggertimer should track anything
    // you probably want this in dev mode, but not in prod mode
    isActive;
    // used to filter out timer dumps by a minimum value
    dumpThreshold;
    constructor(opts = { isActive: true, dumpThreshold: 0 }) {
        this.isActive = opts.isActive;
        this.dumpThreshold = opts.dumpThreshold;
    }
    // start a timer with a name
    startTimer(timerName) {
        // can't start timers if not active
        if (!this.isActive)
            return;
        // can't start a started timer
        if (this.timerStarts[timerName])
            throw new Error(`Timer ${timerName} has already been started!`);
        this.timerStarts[timerName] = Date.now();
    }
    stopTimer(timerName) {
        // not that it should matter, but it doesn't hurt to be thorough
        if (!this.isActive)
            return;
        // if a timer hasn't been started, it can't be stopped
        if (!this.timerStarts[timerName])
            throw new Error(`Timer ${timerName} has not been started!`);
        // just some sanity checking
        if (this.timerStops[timerName])
            throw new Error(`Timer ${timerName} has already been stopped!`);
        this.timerStops[timerName] = Date.now();
    }
    // just in case someone wants to reuse a timer instance
    setActive(isActive) {
        this.isActive = isActive;
    }
    getTimerDeltas() {
        const deltas = {};
        // only iterate over timerStops because we don't care about unstopped timers
        Object.keys(this.timerStops).forEach((timerKey) => {
            deltas[timerKey] = this.timerStops[timerKey] - this.timerStarts[timerKey];
        });
        return deltas;
    }
    // dump the timers in a nice format, default to console.info
    dumpTimers(cb = console.info) {
        const deltas = this.getTimerDeltas();
        Object.keys(deltas).forEach((timerName) => {
            const delta = deltas[timerName];
            if (delta < this.dumpThreshold)
                return;
            cb(`[${delta}ms] ${timerName}`);
        });
    }
}
exports.LoggerTimer = LoggerTimer;
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