kefir/src/patterns/time-based.js

Reactive Programming library for JavaScript inspired by Bacon.js and RxJS with focus on high performance and low memory usage

import {inherit} from '../utils/objects'
import Stream from '../stream'

export default function timeBased(mixin) {
  function AnonymousStream(wait, options) {
    Stream.call(this)
    this._wait = wait
    this._intervalId = null
    this._$onTick = () => this._onTick()
    this._init(options)
  }

  inherit(
    AnonymousStream,
    Stream,
    {
      _init() {},
      _free() {},

      _onTick() {},

      _onActivation() {
        this._intervalId = setInterval(this._$onTick, this._wait)
      },

      _onDeactivation() {
        if (this._intervalId !== null) {
          clearInterval(this._intervalId)
          this._intervalId = null
        }
      },

      _clear() {
        Stream.prototype._clear.call(this)
        this._$onTick = null
        this._free()
      },
    },
    mixin
  )

  return AnonymousStream
}