infobip-rtc/dist/util/Retry.js

Infobip RTC JavaScript SDK - Infobip WebRTC API Implementation

export var RetryFailReason;
(function (RetryFailReason) {
    RetryFailReason[RetryFailReason["MaxRetries"] = 0] = "MaxRetries";
})(RetryFailReason || (RetryFailReason = {}));
export default class Retry {
    static linearDelay(baseDelayMs, baseIncrementMs) {
        baseIncrementMs = baseIncrementMs || baseDelayMs;
        return iteration => baseDelayMs + iteration * baseIncrementMs;
    }
    static fibonacciDelay(baseDelayMs) {
        const phi = (1 + 5 ** .5) / 2, psi = 1 - phi;
        const fib = (n) => Math.round((phi ** n - psi ** n) / (5 ** .5));
        return iteration => baseDelayMs * fib(iteration + 1);
    }
    static exponentialDelay(baseDelayMs, factor = 2) {
        return iteration => factor ** iteration * baseDelayMs;
    }
    constructor(callable, delayFunction, maxDelayMs = 5000, maxRetries = 5, timeoutFunction = window.setTimeout.bind(window), cancelTimeoutFunction = (ref) => window.clearTimeout(ref)) {
        this.callable = callable;
        this.delayFunction = delayFunction;
        this.maxDelayMs = maxDelayMs;
        this.maxRetries = maxRetries;
        this.timeoutFunction = timeoutFunction;
        this.cancelTimeoutFunction = cancelTimeoutFunction;
        this.awaitingTimeout = false;
        this.timeoutRef = null;
        this.iteration = 0;
    }
    cancel() {
        if (this.awaitingTimeout) {
            this.cancelTimeoutFunction(this.timeoutRef);
            return true;
        }
        return false;
    }
    retry() {
        if (this.awaitingTimeout)
            return this;
        if (this.iteration >= this.maxRetries) {
            this.reject?.(RetryFailReason.MaxRetries);
            return this;
        }
        let timeoutMs = Math.min(this.maxDelayMs, this.delayFunction(this.iteration));
        this.awaitingTimeout = true;
        this.timeoutRef = this.timeoutFunction(() => {
            this.awaitingTimeout = false;
            this.timeoutRef = null;
            this.callable(this.iteration++);
        }, timeoutMs);
        return this;
    }
    catch(reject) {
        this.reject = reject;
        return this;
    }
}
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