feat: persist color theme setting

src/Bootstrap.test.tsx

@@ -52,6 +52,7 @@ test('persists user settings if none were already persisted', async () => {
   })
 
   expect(mockSetItem).toHaveBeenCalledWith(PersistedStorageKeys.USER_SETTINGS, {
+    colorMode: 'dark',
     userId: 'abc123',
   })
 })

src/Bootstrap.tsx

@@ -3,6 +3,7 @@ import { BrowserRouter as Router, Routes, Route } from 'react-router-dom'
 import { v4 as uuid } from 'uuid'
 import localforage from 'localforage'
 
+import { SettingsContext } from 'contexts/SettingsContext'
 import { Home } from 'pages/Home/'
 import { PublicRoom } from 'pages/PublicRoom/'
 import { UserSettings } from 'models/settings'
@@ -22,8 +23,11 @@ function Bootstrap({
   getUuid = uuid,
 }: BootstrapProps) {
   const [hasLoadedSettings, setHasLoadedSettings] = useState(false)
-  const [settings, setSettings] = useState({ userId: getUuid() })
+  const [userSettings, setUserSettings] = useState<UserSettings>({
-  const { userId } = settings
+    userId: getUuid(),
+    colorMode: 'dark',
+  })
+  const { userId } = userSettings
 
   useEffect(() => {
     ;(async () => {
@@ -35,20 +39,38 @@ function Bootstrap({
         )
 
       if (persistedUserSettings) {
-        setSettings(persistedUserSettings)
+        setUserSettings(persistedUserSettings)
       } else {
         await persistedStorage.setItem(
           PersistedStorageKeys.USER_SETTINGS,
-          settings
+          userSettings
         )
       }
 
       setHasLoadedSettings(true)
     })()
-  }, [hasLoadedSettings, persistedStorage, settings, userId])
+  }, [hasLoadedSettings, persistedStorage, userSettings, userId])
+
+  const settingsContextValue = {
+    updateUserSettings: async (changedSettings: Partial<UserSettings>) => {
+      const newSettings = {
+        ...userSettings,
+        ...changedSettings,
+      }
+
+      await persistedStorage.setItem(
+        PersistedStorageKeys.USER_SETTINGS,
+        newSettings
+      )
+
+      setUserSettings(newSettings)
+    },
+    getUserSettings: () => ({ ...userSettings }),
+  }
 
   return (
     <Router>
+      <SettingsContext.Provider value={settingsContextValue}>
         <Shell userPeerId={userId}>
           {hasLoadedSettings ? (
             <Routes>
@@ -64,6 +86,7 @@ function Bootstrap({
             <></>
           )}
         </Shell>
+      </SettingsContext.Provider>
     </Router>
   )
 }

src/components/Shell/Shell.tsx

@@ -1,11 +1,12 @@
 import {
-  forwardRef,
   PropsWithChildren,
+  SyntheticEvent,
+  forwardRef,
   useCallback,
+  useContext,
   useEffect,
   useMemo,
   useState,
-  SyntheticEvent,
 } from 'react'
 import { Link } from 'react-router-dom'
 import CssBaseline from '@mui/material/CssBaseline'
@@ -34,6 +35,7 @@ import Brightness4Icon from '@mui/icons-material/Brightness4'
 import Brightness7Icon from '@mui/icons-material/Brightness7'
 
 import { ShellContext } from 'contexts/ShellContext'
+import { SettingsContext } from 'contexts/SettingsContext'
 import { AlertOptions } from 'models/shell'
 import { PeerNameDisplay } from 'components/PeerNameDisplay'
 
@@ -98,6 +100,7 @@ const DrawerHeader = styled('div')(({ theme }) => ({
 }))
 
 export const Shell = ({ children, userPeerId }: ShellProps) => {
+  const settingsContext = useContext(SettingsContext)
   const [isAlertShowing, setIsAlertShowing] = useState(false)
   const [isDrawerOpen, setIsDrawerOpen] = useState(false)
   const [doShowPeers, setDoShowPeers] = useState(false)
@@ -125,20 +128,21 @@ export const Shell = ({ children, userPeerId }: ShellProps) => {
     [numberOfPeers, setDoShowPeers, setNumberOfPeers, setTitle, showAlert]
   )
 
-  const [mode, setMode] = useState<'light' | 'dark'>('dark')
+  const colorMode = settingsContext.getUserSettings().colorMode
 
   const handleColorModeToggleClick = () => {
-    setMode(prevMode => (prevMode === 'light' ? 'dark' : 'light'))
+    const newMode = colorMode === 'light' ? 'dark' : 'light'
+    settingsContext.updateUserSettings({ colorMode: newMode })
   }
 
   const theme = useMemo(
     () =>
       createTheme({
         palette: {
-          mode,
+          mode: colorMode,
         },
       }),
-    [mode]
+    [colorMode]
   )
 
   const handleAlertClose = (

src/contexts/SettingsContext.ts

@@ -0,0 +1,16 @@
+import { createContext } from 'react'
+
+import { UserSettings } from 'models/settings'
+
+interface SettingsContextProps {
+  updateUserSettings: (settings: Partial<UserSettings>) => Promise<void>
+  getUserSettings: () => UserSettings
+}
+
+export const SettingsContext = createContext<SettingsContextProps>({
+  updateUserSettings: () => Promise.resolve(),
+  getUserSettings: () => ({
+    userId: '',
+    colorMode: 'dark',
+  }),
+})

src/models/settings.ts

@@ -1,3 +1,4 @@
 export interface UserSettings {
+  colorMode: 'dark' | 'light'
   userId: string
 }