chore(addSubscriptions): move into own module

src/common/add-subscriptions.js

@@ -0,0 +1,28 @@
+import map from 'lodash/map'
+import React from 'react'
+
+const call = fn => fn()
+
+// `subscriptions` can be a function if we want to ensure that the subscription
+// callbacks have been correctly initialized when there are circular dependencies
+export const addSubscriptions = subscriptions => Component =>
+  class SubscriptionWrapper extends React.PureComponent {
+    _unsubscribes = null
+
+    componentWillMount () {
+      this._unsubscribes = map(
+        typeof subscriptions === 'function' ? subscriptions(this.props) : subscriptions,
+        (subscribe, prop) =>
+          subscribe(value => this.setState({ [prop]: value }))
+      )
+    }
+
+    componentWillUnmount () {
+      this._unsubscribes.forEach(call)
+      this._unsubscribes = null
+    }
+
+    render () {
+      return <Component {...this.props} {...this.state} />
+    }
+  }

src/common/utils.js

@@ -35,6 +35,10 @@ export const EMPTY_OBJECT = Object.freeze({})
 
 // ===================================================================
 
+export addSubscriptions from './add-subscriptions'
+
+// ===================================================================
+
 export const ensureArray = value => {
   if (value === undefined) {
     return []
@@ -57,48 +61,6 @@ export const propsEqual = (o1, o2, props) => {
 
 // ===================================================================
 
-// `subscriptions` can be a function if we want to ensure that the subscription
-// callbacks have been correctly initialized when there are circular dependencies
-export const addSubscriptions = subscriptions => Component => {
-  class SubscriptionWrapper extends BaseComponent {
-    constructor () {
-      super()
-
-      this._unsubscribes = null
-    }
-
-    componentWillMount () {
-      this._unsubscribes = map(
-        isFunction(subscriptions) ? subscriptions(this.props) : subscriptions,
-        (subscribe, prop) =>
-          subscribe(value => this._setState({ [prop]: value }))
-      )
-    }
-
-    componentDidMount () {
-      this._setState = this.setState
-    }
-
-    componentWillUnmount () {
-      forEach(this._unsubscribes, unsubscribe => unsubscribe())
-      this._unsubscribes = null
-      delete this._setState
-    }
-
-    _setState (nextState) {
-      this.state = { ...this.state, nextState }
-    }
-
-    render () {
-      return <Component {...this.props} {...this.state} />
-    }
-  }
-
-  return SubscriptionWrapper
-}
-
-// -------------------------------------------------------------------
-
 export const checkPropsState = (propsNames, stateNames) => Component => {
   const nProps = propsNames && propsNames.length
   const nState = stateNames && stateNames.length