77 lines
2.0 KiB
JavaScript
77 lines
2.0 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.TaskQueue = void 0;
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/**
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* A simple utility class for queuing up a series of async tasks to execute.
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*/
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class TaskQueue {
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constructor() {
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this.tasks = [];
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/**
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* If true, the task list will stop executing if one of the tasks throws an error.
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*/
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this.stopOnError = true;
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}
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/**
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* Adds a new async task to this queue. The provided callback should be executed when
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* the async task is complete.
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*
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* @param task - The async task to add.
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*/
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add(task) {
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this.tasks.push(task);
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}
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/**
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* Adds a synchronous task toi this queue.
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*
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* @param task - The sync task to add.
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*/
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addSync(task) {
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this.add((cb) => {
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try {
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task();
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cb();
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}
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catch (err) {
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cb(err);
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}
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});
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}
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/**
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* Runs all tasks currently in this queue and empties the queue.
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*
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* @param cb - The optional callback to be executed when all tasks in this queue have
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* finished executing.
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*/
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runAll(cb) {
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const taskList = this.tasks;
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this.tasks = [];
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let index = -1;
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const runNext = () => {
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index++;
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if (index >= taskList.length) {
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if (cb !== undefined)
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cb();
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return;
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}
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try {
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taskList[index]((err) => {
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if (err !== undefined) {
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if (cb !== undefined)
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cb(err);
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if (this.stopOnError)
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return;
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}
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runNext();
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});
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}
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catch (err) {
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if (cb !== undefined)
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cb(err);
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}
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};
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runNext();
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}
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}
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exports.TaskQueue = TaskQueue;
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