@woosh/meep-engine/src/core/process/task/util/delayTask.js

Pure JavaScript game engine. Fully featured and production ready.

import Task from "../Task.js";
import { TaskSignal } from "../TaskSignal.js";
import { clamp01 } from "../../../math/clamp01.js";

/**
 *
 * @param {number} delay in milliseconds
 * @param {string} [name]
 * @returns {Task}
 */
export function delayTask(delay, name = "unnamed") {
    let startTime = -1;

    const estimatedDuration = delay / 1000;
    return new Task({
        name: `delay (${delay}ms): ${name}`,
        initializer() {
            startTime = Date.now();
        },
        cycleFunction() {
            if (Date.now() >= startTime + delay) {
                return TaskSignal.EndSuccess;
            } else {
                return TaskSignal.Yield;
            }
        },
        computeProgress() {
            if (startTime === -1) {
                return 0;
            }

            const currentTime = Date.now();
            const remainingTime = currentTime - startTime;

            let fraction = remainingTime / delay;

            if (Number.isNaN(fraction)) {
                fraction = 0;
            }

            return clamp01(fraction);
        },
        estimatedDuration
    });
}