problem

src/App.tsx

@@ -1,60 +1,107 @@
-import classNames from 'classnames';
-
 import 'bulma/css/bulma.css';
 import '@fortawesome/fontawesome-free/css/all.css';
 import './App.scss';
 
-import { PostsList } from './components/PostsList';
-import { PostDetails } from './components/PostDetails';
 import { UserSelector } from './components/UserSelector';
+import { useEffect, useState } from 'react';
+import { User } from './types/User';
+import { getUsers } from './api/users';
 import { Loader } from './components/Loader';
+import { PostsList } from './components/PostsList/PostsList';
+import { Post } from './types/Post';
+import { getPosts } from './api/posts';
+import { PostDetails } from './components/PostDetails';
+import classNames from 'classnames';
 
-export const App = () => (
-  <main className="section">
-    <div className="container">
-      <div className="tile is-ancestor">
-        <div className="tile is-parent">
-          <div className="tile is-child box is-success">
-            <div className="block">
-              <UserSelector />
-            </div>
+export const App = () => {
+  const [users, setUsers] = useState<User[]>([]);
+  const [posts, setPosts] = useState<Post[]>([]);
+  const [selectedPost, setSelectedPost] = useState<Post | null>(null);
+  const [notification, setNotification] = useState('');
+  const [isLoading, setIsLoading] = useState(false);
 
-            <div className="block" data-cy="MainContent">
-              <p data-cy="NoSelectedUser">No user selected</p>
+  // #region load
+  useEffect(() => {
+    getUsers().then(setUsers);
+  }, []);
+  // #endregion
 
-              <Loader />
+  const handleLoadPosts = async (userId: number) => {
+    setIsLoading(true);
+    setPosts([]);
+    setNotification('');
+    setSelectedPost(null);
 
-              <div
-                className="notification is-danger"
-                data-cy="PostsLoadingError"
-              >
-                Something went wrong!
-              </div>
+    try {
+      const loadedPosts = await getPosts(userId);
 
-              <div className="notification is-warning" data-cy="NoPostsYet">
-                No posts yet
+      if (loadedPosts.length === 0) {
+        setNotification('is-warning');
+      }
+
+      setPosts(loadedPosts);
+    } catch {
+      setNotification('is-danger');
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return (
+    <main className="section">
+      <div className="container">
+        <div className="tile is-ancestor">
+          <div className="tile is-parent">
+            <div className="tile is-child box is-success">
+              <div className="block">
+                <UserSelector users={users} onSelect={handleLoadPosts} />
               </div>
 
-              <PostsList />
+              <div className="block" data-cy="MainContent">
+                {!isLoading && posts.length === 0 && !notification && (
+                  <p data-cy="NoSelectedUser">No user selected</p>
+                )}
+                {!isLoading && posts.length > 0 && (
+                  <PostsList posts={posts} onSelect={setSelectedPost} />
+                )}
+                {isLoading && <Loader />}
+
+                {notification === 'is-danger' && (
+                  <div
+                    className="notification is-danger"
+                    data-cy="PostsLoadingError"
+                  >
+                    Something went wrong!
+                  </div>
+                )}
+
+                {notification === 'is-warning' && (
+                  <div className="notification is-warning" data-cy="NoPostsYet">
+                    No posts yet
+                  </div>
+                )}
+              </div>
             </div>
           </div>
-        </div>
 
-        <div
-          data-cy="Sidebar"
-          className={classNames(
-            'tile',
-            'is-parent',
-            'is-8-desktop',
-            'Sidebar',
-            'Sidebar--open',
-          )}
-        >
-          <div className="tile is-child box is-success ">
-            <PostDetails />
+          <div
+            data-cy="Sidebar"
+            className={classNames(
+              'tile',
+              'is-parent',
+              'is-8-desktop',
+              'Sidebar',
+              { 'Sidebar--open': selectedPost },
+            )}
+          >
+            {selectedPost && (
+              <div className="tile is-child box is-success">
+                <PostDetails post={selectedPost} />
+              </div>
+            )}
           </div>
         </div>
       </div>
-    </div>
-  </main>
-);
+    </main>
+  );
+};

src/api/comments.tsx

@@ -0,0 +1,14 @@
+import { Comment } from '../types/Comment';
+import { client } from '../utils/fetchClient';
+
+export const getComments = (postId: number) => {
+  return client.get<Comment[]>(`/comments?postId=${postId}`);
+};
+
+export const deleteComment = (commentId: number) => {
+  return client.delete(`/comments/${commentId}`);
+};
+
+export const addComment = ({ name, email, body, postId }: Comment) => {
+  return client.post<Comment>(`/comments`, { name, email, body, postId });
+};

src/api/posts.tsx

@@ -0,0 +1,6 @@
+import { Post } from '../types/Post';
+import { client } from '../utils/fetchClient';
+
+export const getPosts = (userId: number) => {
+  return client.get<Post[]>(`/posts?userId=${userId}`);
+};

src/api/users.tsx

@@ -0,0 +1,6 @@
+import { User } from '../types/User';
+import { client } from '../utils/fetchClient';
+
+export const getUsers = () => {
+  return client.get<User[]>(`/users`);
+};