created login page #4

src/App.tsx

@@ -1,6 +1,7 @@
 import { Admin, Resource,} from "react-admin";
 //import { Layout } from "./Layout";//
 import { dataProvider } from "./dataProvider";
+import { authProvider} from "./authProvider";
 import { UserList } from "./components/users/UserList.tsx";
 import { UserEdit } from "./components/users/UserEdit.tsx";
 import { PostEdit } from "./components/posts/PostEdit.tsx";
@@ -19,7 +20,7 @@ import { PhotoShow } from "./components/photos/PhotoShow.tsx";
 import { AlbumShow } from "./components/albums/AlbumShow.tsx";
 
 export const App = () => (
-  <Admin layout={MyLayout} dataProvider={dataProvider}>
+  <Admin layout={MyLayout} dataProvider={dataProvider} authProvider={authProvider} requireAuth>
     <Resource name="users" list={UserList} edit={UserEdit} show={UserShow} />
     <Resource name="posts" list={PostList} edit={PostEdit} show={PostShow} />
     <Resource
@@ -44,4 +45,4 @@ export const App = () => (
 );
 
 
-// ShowGuesser, EditGuesser, ListGuesser // 
+// ShowGuesser, EditGuesser, ListGuesser //

src/authProvider.ts

@@ -0,0 +1,41 @@
+import {AuthProvider, HttpError} from "react-admin";
+import data from "./users.json";
+
+export const authProvider: AuthProvider = {
+  login: ({ username, password }) => {
+    const user = data.users.find(
+        (u) => u.username === username && u.password === password,
+    );
+
+    if (user) {
+      const { password, ...userToPersist } = user;
+        localStorage.setItem("user", JSON.stringify(userToPersist));
+      return Promise.resolve();
+    }
+
+    return Promise.reject(
+        new HttpError("Invalid username or password", 401, {
+          message: "Invalid username or password",
+        }),
+    );
+  },
+  async logout() {
+    localStorage.removeItem("user");
+    return Promise.resolve();
+  },
+  async checkAuth() {
+    return localStorage.getItem("user") ? Promise.resolve() : Promise.reject();
+  },
+  async getIdentity() {
+    const persistedUser = localStorage.getItem("user");
+    const user = persistedUser ? JSON.parse(persistedUser) : null;
+
+    return Promise.resolve(user);
+  },
+  async checkError() {
+    return Promise.resolve();
+  },
+  async getPermissions() {
+    return Promise.resolve(undefined);
+  },
+};