add solution

src/App.tsx

@@ -1,60 +1,155 @@
-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 { Loader } from './components/Loader';
+import { useEffect, useState } from 'react';
+import { User } from './types/User';
+import { client } from './utils/fetchClient';
+import { Post } from './types/Post';
+import { Comment } from './types/Comment';
+import classNames from 'classnames';
+import { PostDetails } from './components/PostDetails';
 
-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 [activeUser, setActiveUser] = useState<User | null>(null);
+  const [posts, setPosts] = useState<Post[]>([]);
+  const [isLoading, setIsLoading] = useState(false);
+  const [isError, setIsError] = useState(false);
+  const [activePost, setActivePost] = useState<Post | null>(null);
+  const [comments, setComments] = useState<Comment[]>([]);
+  const [isCommentsLoading, setIsCommentsLoading] = useState(false);
+  const [isCommentsError, setIsCommentsError] = useState(false);
 
-            <div className="block" data-cy="MainContent">
-              <p data-cy="NoSelectedUser">No user selected</p>
+  useEffect(() => {
+    client.get<User[]>('/users').then(setUsers);
+  }, []);
 
-              <Loader />
+  const handleActiveUser = (user: User) => {
+    setActiveUser(null);
+    setActivePost(null);
+    setIsLoading(true);
+    setIsError(false);
 
-              <div
-                className="notification is-danger"
-                data-cy="PostsLoadingError"
-              >
-                Something went wrong!
-              </div>
+    setActiveUser(user);
+    client
+      .get<Post[]>(`/posts?userId=${user?.id}`)
+      .then(setPosts)
+      .catch(() => setIsError(true))
+      .finally(() => setIsLoading(false));
+  };
+
+  const handleActivePost = (post: Post | null) => {
+    setIsCommentsLoading(true);
+    setIsCommentsError(false);
+
+    setActivePost(post);
+    if (post !== null) {
+      client
+        .get<Comment[]>(`/comments?postId=${post?.id}`)
+        .then(setComments)
+        .catch(() => setIsCommentsError(true))
+        .finally(() => setIsCommentsLoading(false));
+    }
+  };
+
+  const handleAddComment = (newComment: Comment, postId: number) => {
+    const comment = { ...newComment, postId: postId };
 
-              <div className="notification is-warning" data-cy="NoPostsYet">
-                No posts yet
+    return client
+      .post<Comment>('/comments', comment)
+      .then(commentFromServer =>
+        setComments(prev => [...(prev || []), commentFromServer]),
+      )
+      .catch(() => setIsCommentsError(true));
+  };
+
+  const handleDeleteComment = (commentId: number) => {
+    client
+      .delete(`/comments/${commentId}`)
+      .then(() =>
+        setComments(prevComments =>
+          prevComments.filter(prevComment => prevComment.id !== commentId),
+        ),
+      )
+      .catch(() => setIsCommentsError(true));
+  };
+
+  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}
+                  activeUser={activeUser}
+                  handleActiveUser={handleActiveUser}
+                />
               </div>
 
-              <PostsList />
+              <div className="block" data-cy="MainContent">
+                {!activeUser && (
+                  <p data-cy="NoSelectedUser">No user selected</p>
+                )}
+
+                {isLoading && <Loader />}
+
+                {isError && (
+                  <div
+                    className="notification is-danger"
+                    data-cy="PostsLoadingError"
+                  >
+                    Something went wrong!
+                  </div>
+                )}
+
+                {!isLoading && !isError && posts.length === 0 && activeUser && (
+                  <div className="notification is-warning" data-cy="NoPostsYet">
+                    No posts yet
+                  </div>
+                )}
+
+                {posts.length > 0 && !isLoading && (
+                  <PostsList
+                    posts={posts}
+                    activePost={activePost}
+                    handleActivePost={handleActivePost}
+                  />
+                )}
+              </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': activePost },
+            )}
+          >
+            <div className="tile is-child box is-success ">
+              {activePost && (
+                <PostDetails
+                  activePost={activePost}
+                  comments={comments}
+                  isCommentsError={isCommentsError}
+                  isCommentsLoading={isCommentsLoading}
+                  handleDeleteComment={handleDeleteComment}
+                  handleAddComment={handleAddComment}
+                />
+              )}
+            </div>
           </div>
         </div>
       </div>
-    </div>
-  </main>
-);
+    </main>
+  );
+};