Fix publish topic update

app/src/actions/Tree.ts

@@ -1,9 +1,18 @@
-import { ActionTypes, CustomAction } from '../reducers'
+import { ActionTypes, CustomAction, AppState } from '../reducers'
 import * as q from '../../../backend/src/Model'
+import { Dispatch } from 'redux'
+import { setTopic } from './Publish'
 
-export const selectTopic = (topic: q.TreeNode): CustomAction => {
-  return {
+export const selectTopic = (topic: q.TreeNode) => (dispatch: Dispatch<any>, getState: () => AppState)  => {
+  const { selectedTopic } = getState().tooBigReducer
+
+  // Update publish topic
+  if (selectedTopic && (selectedTopic.path() === getState().publish.topic || !getState().publish.topic)) {
+    dispatch(setTopic(topic.path()))
+  }
+
+  dispatch({
     selectedTopic: topic,
     type: ActionTypes.selectTopic,
-  }
+  })
 }

app/src/components/Sidebar/Publish/Publish.tsx

@@ -74,9 +74,9 @@ class Publish extends React.Component<Props, State> {
     }
 
     this.props.actions.publish(this.props.connectionId)
-    const topic = this.currentTopic() || ''
-    const payload = this.props.payload
 
+    const topic = this.props.topic || ''
+    const payload = this.props.payload
     if (this.props.connectionId && topic) {
       this.addMessageToHistory(topic, payload)
     }
@@ -100,19 +100,12 @@ class Publish extends React.Component<Props, State> {
     )
   }
 
-  private currentTopic(): string | undefined {
-    const { node, topic } = this.props
-    const selectedNodePath = (node ? node.path() : undefined)
-
-    return (topic !== undefined) ? topic : selectedNodePath
-  }
-
   private clearTopic = () => {
     this.props.actions.setTopic('')
   }
 
   private topic() {
-    const topicStr = this.currentTopic() || ''
+    const topicStr = this.props.topic || ''
 
     return (
       <div>