Ember Polling Mixin for Routes

polling-alt.js

// an alternative approach to my gist below

import Ember from 'ember';

const get = Ember.get;
const set = Ember.set;
const later = Ember.run.later;
const cancel = Ember.run.cancel;

export default Ember.Mixin.create({
  pollInterval: 5000, // default value in ms
  
  poll(...items) {
    return items.map((item) => {
      const timer = later(this, function() {
        get(this, `controller.model.${item[0]}`).reload().then(() => {
          if (!get(this, `controller.model.${item[0]}.${item[1]}`)) {
            this.poll(item);
          }
        });
      }, get(this, 'pollInterval'));
      
      set(this, `timer-${item[0]}`, timer);
      return timer;
    });
  },
  
  stopPoll(...models) {
    return models.map((model) => {
      return cancel(get(this, `timer-${model}`));
    });
  }
});
  
  // use case
  activate() {
    // provide the model name and the property where when true we stop polling
    // if no property provided, it will continuously poll
    // must always be list of arrays: this.poll([model1], [model2, property], etc)
    this.poll(['productBankAccount', 'hasBeenProvided']);
  },
  
  deactivate() {
    this.stopPoll('productBankAccount');
  },

polling.js

import Ember from 'ember';

const get = Ember.get;
const set = Ember.set;
const later = Ember.run.later;
const cancel = Ember.run.cancel;

export default Ember.Mixin.create({
  pollingTime: 5000, // default value in ms
  continuePoll: false, // reset this in the callback of the poll method
  timer: null,
  
  poll(cb) {
    const continuePoll = get(this, continuePoll);
    const timer = later(this, function() {
      if (continuePoll) {
        cb();
        this.poll(cb);
      }
    }, get(this, pollingTime));
    
    set(this, 'timer', timer);
  },
  
  stopPoll() {
    return cancel(get(this, timer));
  }
});

// use case
  activate() {
    this.poll(() => {
      get(this, 'controller.model.productBankAccount').reload().then(continuePollIf);
    });
  },

  deactivate() {
    this.stopPoll();
  },

  continuePollIf() {
    const continuePoll = !get(this, 'controller.model.productBankAccount.hasBeenProvided');
    set(this, 'continuePoll', continuePoll);
  }

I think we should rely on Ember.run as much as possible rather than window.setInterval or window.setTimeout to ensure computed properties are updated properly with each execution.