react-native-meteor/lib/queue.js

Full Meteor Client for React Native

export default class Queue {
  /*
    *   As the name implies, `consumer` is the (sole) consumer of the queue.
    *   It gets called with each element of the queue and its return value
    *   serves as a ack, determining whether the element is removed or not from
    *   the queue, allowing then subsequent elements to be processed.
    */

  constructor(consumer) {
    this.consumer = consumer;
    this.queue = [];
  }

  push(element) {
    this.queue.push(element);
    this.process();
  }

  process() {
    if (this.queue.length !== 0) {
      const ack = this.consumer(this.queue[0]);
      if (ack) {
        this.queue.shift();
        this.process();
      }
    }
  }

  empty() {
    this.queue = [];
  }
}