Function createContextEmitter

modules/index.js:3–49

(contextKey)

import React, { PropTypes } from 'react'

const createContextEmitter = (contextKey) => (

  class Emitter extends React.Component {

    static propTypes = {
      children: PropTypes.node,
      value: PropTypes.any
    }

    static childContextTypes = {
      [contextKey]: PropTypes.object
    }

    constructor() {
      super()
      this.subscribers = []
    }

    getChildContext() {
      return {
        [contextKey]: {
          getInitialValue: () => {
            return this.props.value
          },

          subscribe: (subscriber) => {
            this.subscribers.push(subscriber)
            return () => {
              this.subscribers = this.subscribers.filter(
                alleged => alleged !== subscriber
              )
            }
          }
        }
      }
    }

    componentWillReceiveProps(nextProps) {
      this.subscribers.forEach(f => f(nextProps.value))
    }

    render() {
      return this.props.children
    }

  }
)

const createContextSubscriber = (contextKey) => (