Fix channel reply switching channels.

CHANGELOG.md

@@ -28,6 +28,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Add fallback when images fail to load _community pr!_ ([#4019](https://github.com/lbryio/lbry-desktop/pull/4019))
 - Fetch new content when clicking LBRY logo while on homepage _community pr!_ ([#4031](https://github.com/lbryio/lbry-desktop/pull/4031))
 - Aligns text across browsers and desktop _community pr!_ ([#4050](https://github.com/lbryio/lbry-desktop/pull/4050))
+- Reselect channel as "replying as" when switching channels ([#3926](https://github.com/lbryio/lbry-desktop/issues/3926))
 
 ## [0.45.0] - [2020-04-21]
 

ui/effects/use-persisted-state.js

@@ -1,9 +1,20 @@
 import { useState, useEffect } from 'react';
 
+const listeners = {};
+
+function getSetAllValues(key, setValue) {
+  if (!key) {
+    // If no key just return the normal setValue function
+    return setValue;
+  }
+  return value => listeners[key].forEach(fn => fn(value));
+}
+
 export default function usePersistedState(key, firstTimeDefault) {
   // If no key is passed in, act as a normal `useState`
   let defaultValue;
   let localStorageAvailable;
+
   try {
     localStorageAvailable = Boolean(window.localStorage);
   } catch (e) {
@@ -32,11 +43,25 @@ export default function usePersistedState(key, firstTimeDefault) {
 
   const [value, setValue] = useState(defaultValue);
 
+  if (key && !Array.isArray(listeners[key])) {
+    listeners[key] = [];
+  }
+
   useEffect(() => {
     if (key && localStorageAvailable) {
       localStorage.setItem(key, typeof value === 'object' ? JSON.stringify(value) : value);
     }
+    if (key) {
+      // add hook on mount
+      listeners[key].push(setValue);
+    }
+    return () => {
+      if (key) {
+        // remove hook on unmount
+        listeners[key] = listeners[key].filter(listener => listener !== setValue);
+      }
+    };
   }, [key, value, localStorageAvailable]);
 
-  return [value, setValue];
+  return [value, getSetAllValues(key, setValue)];
 }