Refactor to just CommandBar and GlobalState (#337)

* Refactor to just CommandBar and GlobalState

* @Irev-Dev review: consolidate uses of useContext

src/components/GlobalStateProvider.tsx

@@ -0,0 +1,147 @@
+import { useMachine } from '@xstate/react'
+import { useNavigate } from 'react-router-dom'
+import { paths } from '../Router'
+import {
+  authCommandBarMeta,
+  authMachine,
+  TOKEN_PERSIST_KEY,
+} from '../machines/authMachine'
+import withBaseUrl from '../lib/withBaseURL'
+import React, { createContext, useEffect, useRef } from 'react'
+import useStateMachineCommands from '../hooks/useStateMachineCommands'
+import {
+  SETTINGS_PERSIST_KEY,
+  settingsCommandBarMeta,
+  settingsMachine,
+} from 'machines/settingsMachine'
+import { toast } from 'react-hot-toast'
+import { setThemeClass } from 'lib/theme'
+import {
+  AnyStateMachine,
+  ContextFrom,
+  InterpreterFrom,
+  Prop,
+  StateFrom,
+} from 'xstate'
+import { useCommandsContext } from 'hooks/useCommandsContext'
+
+type MachineContext<T extends AnyStateMachine> = {
+  state: StateFrom<T>
+  context: ContextFrom<T>
+  send: Prop<InterpreterFrom<T>, 'send'>
+}
+
+type GlobalContext = {
+  auth: MachineContext<typeof authMachine>
+  settings: MachineContext<typeof settingsMachine>
+}
+
+export const GlobalStateContext = createContext({} as GlobalContext)
+
+export const GlobalStateProvider = ({
+  children,
+}: {
+  children: React.ReactNode
+}) => {
+  const navigate = useNavigate()
+  const { commands } = useCommandsContext()
+
+  // Settings machine setup
+  const retrievedSettings = useRef(
+    localStorage?.getItem(SETTINGS_PERSIST_KEY) || '{}'
+  )
+  const persistedSettings = Object.assign(
+    settingsMachine.initialState.context,
+    JSON.parse(retrievedSettings.current) as Partial<
+      (typeof settingsMachine)['context']
+    >
+  )
+
+  const [settingsState, settingsSend] = useMachine(settingsMachine, {
+    context: persistedSettings,
+    actions: {
+      toastSuccess: (context, event) => {
+        const truncatedNewValue =
+          'data' in event && event.data instanceof Object
+            ? (context[Object.keys(event.data)[0] as keyof typeof context]
+                .toString()
+                .substring(0, 28) as any)
+            : undefined
+        toast.success(
+          event.type +
+            (truncatedNewValue
+              ? ` to "${truncatedNewValue}${
+                  truncatedNewValue.length === 28 ? '...' : ''
+                }"`
+              : '')
+        )
+      },
+    },
+  })
+
+  useStateMachineCommands({
+    state: settingsState,
+    send: settingsSend,
+    commands,
+    owner: 'settings',
+    commandBarMeta: settingsCommandBarMeta,
+  })
+
+  useEffect(
+    () => setThemeClass(settingsState.context.theme),
+    [settingsState.context.theme]
+  )
+
+  // Auth machine setup
+  const [authState, authSend] = useMachine(authMachine, {
+    actions: {
+      goToSignInPage: () => {
+        navigate(paths.SIGN_IN)
+        logout()
+      },
+      goToIndexPage: () => {
+        if (window.location.pathname.includes(paths.SIGN_IN)) {
+          navigate(paths.INDEX)
+        }
+      },
+    },
+  })
+
+  useStateMachineCommands({
+    state: authState,
+    send: authSend,
+    commands,
+    commandBarMeta: authCommandBarMeta,
+    owner: 'auth',
+  })
+
+  return (
+    <GlobalStateContext.Provider
+      value={{
+        auth: {
+          state: authState,
+          context: authState.context,
+          send: authSend,
+        },
+        settings: {
+          state: settingsState,
+          context: settingsState.context,
+          send: settingsSend,
+        },
+      }}
+    >
+      {children}
+    </GlobalStateContext.Provider>
+  )
+}
+
+export default GlobalStateProvider
+
+export function logout() {
+  const url = withBaseUrl('/logout')
+  localStorage.removeItem(TOKEN_PERSIST_KEY)
+  return fetch(url, {
+    method: 'POST',
+    credentials: 'include',
+  })
+}