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45 lines
934 B
45 lines
934 B
3 years ago
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'use strict';
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var _ = require('lodash');
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module.exports = SubQueue;
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function SubQueue() {
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this.__queue__ = [];
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}
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/**
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* Add a task to this queue
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* @param {Function} task
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*/
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SubQueue.prototype.push = function( task, opt ) {
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opt = opt || {};
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// Don't register named task if they're already planned
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if ( opt.once && _.find(this.__queue__, { name: opt.once }) ) {
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return;
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}
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this.__queue__.push({ task: task, name: opt.once });
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};
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/**
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* Return the first entry of this queue
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* @return {Function} The first task
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*/
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SubQueue.prototype.shift = function() {
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return this.__queue__.shift();
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};
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/**
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* Run task
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* @param {Function} skip Callback if no task is available
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* @param {Function} done Callback once the task is completed
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*/
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SubQueue.prototype.run = function( skip, done, pause ) {
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if ( this.__queue__.length === 0 ) return skip();
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setImmediate( this.shift().task.bind(null, done, pause) );
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};
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