respond-framework/dist/createModule/methods/subscribe.js

create as fast you think

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = subscribe;
exports.notify = notify;
var _reserved = require("../reserved.js");
function subscribe(send, allReductions = false) {
  // notifications on trigger events only by default
  send.module = this.state;
  send.branch = this.branch; // branch of module attached to `respond` object unique to each module
  send.allReductions = allReductions;
  this.subscribers.push(send);
  return () => {
    const index = this.subscribers.findIndex(l => l === send);
    this.subscribers.splice(index, 1);
  };
}
function notify(e) {
  this.devtools.send(e);
  if (this.subscribers.length === 0) return;
  const {
    event
  } = e;
  if (event.sync && !event.notifyReduce) return; // by default sync events don't trigger notifyReduce
  if (event === this.state.events.init) return;
  const branch = event[_reserved._branch];
  const isTrigger = e.meta.trigger;
  const sent = this.subscribers.filter(send => branch.indexOf(send.branch) === 0 &&
  // event is child of subscribed module or the same module
  send.allReductions || isTrigger).map(send => send(send.module, e));
  if (sent.length === 0) return;
  this.promises.push(...sent);
}