From ff8ff649f61565cd2cfdaea51d6d89721032ac7d Mon Sep 17 00:00:00 2001
From: Oleksii-Ivan Stetsyk <farshaleks@gmail.com>
Date: Mon, 17 Feb 2025 19:18:47 +0200
Subject: [PATCH] dynamic-list-of-posts

---
 src/App.tsx                       |  91 +++++++-------
 src/components/NewCommentForm.tsx | 180 +++++++++++++++++++++-------
 src/components/PostDetails.tsx    | 189 +++++++++++++++++-------------
 src/components/PostsList.tsx      | 168 ++++++++++++++------------
 src/components/UserSelector.tsx   |  88 ++++++++++----
 5 files changed, 450 insertions(+), 266 deletions(-)

diff --git a/src/App.tsx b/src/App.tsx
index 017957182..0fc86134d 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,60 +1,63 @@
+import { useState } from 'react';
 import classNames from 'classnames';
 
 import 'bulma/css/bulma.css';
 import '@fortawesome/fontawesome-free/css/all.css';
 import './App.scss';
 
+import { UserSelector } from './components/UserSelector';
 import { PostsList } from './components/PostsList';
 import { PostDetails } from './components/PostDetails';
-import { UserSelector } from './components/UserSelector';
-import { Loader } from './components/Loader';
-
-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>
-
-            <div className="block" data-cy="MainContent">
-              <p data-cy="NoSelectedUser">No user selected</p>
-
-              <Loader />
-
-              <div
-                className="notification is-danger"
-                data-cy="PostsLoadingError"
-              >
-                Something went wrong!
+import { Post } from './types/Post';
+
+export const App = () => {
+  const [selectedUserId, setSelectedUserId] = useState<number | null>(null);
+  const [selectedPost, setSelectedPost] = useState<Post | null>(null);
+
+  const handleUserSelect = (userId: number | null) => {
+    setSelectedUserId(userId);
+    setSelectedPost(null);
+  };
+
+  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 onUserSelect={handleUserSelect} />
               </div>
-
-              <div className="notification is-warning" data-cy="NoPostsYet">
-                No posts yet
+              <div className="block" data-cy="MainContent">
+                {selectedUserId === null ? (
+                  <p data-cy="NoSelectedUser">No user selected</p>
+                ) : (
+                  <PostsList
+                    userId={selectedUserId}
+                    selectedPost={selectedPost}
+                    onPostSelect={setSelectedPost}
+                  />
+                )}
               </div>
-
-              <PostsList />
             </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 !== null }
+            )}
+          >
+            <div className="tile is-child box is-success">
+              <PostDetails post={selectedPost} />
+            </div>
           </div>
         </div>
       </div>
-    </div>
-  </main>
-);
+    </main>
+  );
+};
diff --git a/src/components/NewCommentForm.tsx b/src/components/NewCommentForm.tsx
index 73a8a0b45..61517dd4e 100644
--- a/src/components/NewCommentForm.tsx
+++ b/src/components/NewCommentForm.tsx
@@ -1,99 +1,189 @@
-import React from 'react';
+/* eslint-disable no-console */
+import React, { useState } from 'react';
+import { CommentData } from '../types/Comment';
+
+interface NewCommentFormProps {
+  onSubmit: (data: CommentData) => void;
+}
+
+export const NewCommentForm: React.FC<NewCommentFormProps> = ({ onSubmit }) => {
+  const [name, setName] = useState('');
+  const [email, setEmail] = useState('');
+  const [body, setBody] = useState('');
+  const [errors, setErrors] = useState<{
+    name?: string;
+    email?: string;
+    body?: string;
+  }>({});
+  const [isSubmitting, setIsSubmitting] = useState(false);
+  const [submitted, setSubmitted] = useState(false);
+
+  const validate = () => {
+    const newErrors: { name?: string; email?: string; body?: string } = {};
+
+    if (!name.trim()) {
+      newErrors.name = 'Name is required';
+    }
+
+    if (!email.trim()) {
+      newErrors.email = 'Email is required';
+    }
+
+    if (!body.trim()) {
+      newErrors.body = 'Enter some text';
+    }
+
+    return newErrors;
+  };
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+    setSubmitted(true);
+    const newErrors = validate();
+
+    if (Object.keys(newErrors).length > 0) {
+      setErrors(newErrors);
+
+      return;
+    }
+
+    setIsSubmitting(true);
+    try {
+      await onSubmit({ name, email, body });
+      setBody('');
+      setErrors({});
+      setSubmitted(false);
+    } catch (err) {
+      console.error('Failed to add comment', err);
+    } finally {
+      setIsSubmitting(false);
+    }
+  };
+
+  const handleClear = () => {
+    setErrors({});
+    setBody('');
+  };
 
-export const NewCommentForm: React.FC = () => {
   return (
-    <form data-cy="NewCommentForm">
+    <form data-cy="NewCommentForm" onSubmit={handleSubmit}>
       <div className="field" data-cy="NameField">
         <label className="label" htmlFor="comment-author-name">
           Author Name
         </label>
-
         <div className="control has-icons-left has-icons-right">
           <input
             type="text"
-            name="name"
             id="comment-author-name"
+            name="name"
             placeholder="Name Surname"
-            className="input is-danger"
+            className={`input ${submitted && errors.name ? 'is-danger' : ''}`}
+            value={name}
+            onChange={e => {
+              setName(e.target.value);
+              if (errors.name) {
+                setErrors(prev => ({ ...prev, name: undefined }));
+              }
+            }}
           />
-
           <span className="icon is-small is-left">
-            <i className="fas fa-user" />
-          </span>
-
-          <span
-            className="icon is-small is-right has-text-danger"
-            data-cy="ErrorIcon"
-          >
-            <i className="fas fa-exclamation-triangle" />
+            <i className="fas fa-user"></i>
           </span>
+          {submitted && errors.name && (
+            <span
+              className="icon is-small is-right has-text-danger"
+              data-cy="ErrorIcon"
+            >
+              <i className="fas fa-exclamation-triangle"></i>
+            </span>
+          )}
         </div>
-
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Name is required
-        </p>
+        {submitted && errors.name && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            {errors.name}
+          </p>
+        )}
       </div>
 
       <div className="field" data-cy="EmailField">
         <label className="label" htmlFor="comment-author-email">
           Author Email
         </label>
-
         <div className="control has-icons-left has-icons-right">
           <input
             type="text"
-            name="email"
             id="comment-author-email"
+            name="email"
             placeholder="email@test.com"
-            className="input is-danger"
+            className={`input ${submitted && errors.email ? 'is-danger' : ''}`}
+            value={email}
+            onChange={e => {
+              setEmail(e.target.value);
+              if (errors.email) {
+                setErrors(prev => ({ ...prev, email: undefined }));
+              }
+            }}
           />
-
           <span className="icon is-small is-left">
-            <i className="fas fa-envelope" />
-          </span>
-
-          <span
-            className="icon is-small is-right has-text-danger"
-            data-cy="ErrorIcon"
-          >
-            <i className="fas fa-exclamation-triangle" />
+            <i className="fas fa-envelope"></i>
           </span>
+          {submitted && errors.email && (
+            <span
+              className="icon is-small is-right has-text-danger"
+              data-cy="ErrorIcon"
+            >
+              <i className="fas fa-exclamation-triangle"></i>
+            </span>
+          )}
         </div>
-
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Email is required
-        </p>
+        {submitted && errors.email && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            {errors.email}
+          </p>
+        )}
       </div>
 
       <div className="field" data-cy="BodyField">
         <label className="label" htmlFor="comment-body">
           Comment Text
         </label>
-
         <div className="control">
           <textarea
             id="comment-body"
             name="body"
             placeholder="Type comment here"
-            className="textarea is-danger"
+            className={`textarea ${submitted && errors.body ? 'is-danger' : ''}`}
+            value={body}
+            onChange={e => {
+              setBody(e.target.value);
+              if (errors.body) {
+                setErrors(prev => ({ ...prev, body: undefined }));
+              }
+            }}
           />
         </div>
-
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Enter some text
-        </p>
+        {submitted && errors.body && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            {errors.body}
+          </p>
+        )}
       </div>
 
       <div className="field is-grouped">
         <div className="control">
-          <button type="submit" className="button is-link is-loading">
+          <button
+            type="submit"
+            className={`button is-link ${isSubmitting ? 'is-loading' : ''}`}
+          >
             Add
           </button>
         </div>
-
         <div className="control">
-          {/* eslint-disable-next-line react/button-has-type */}
-          <button type="reset" className="button is-link is-light">
+          <button
+            type="reset"
+            className="button is-link is-light"
+            onClick={handleClear}
+          >
             Clear
           </button>
         </div>
diff --git a/src/components/PostDetails.tsx b/src/components/PostDetails.tsx
index 2f82db916..824e179b1 100644
--- a/src/components/PostDetails.tsx
+++ b/src/components/PostDetails.tsx
@@ -1,106 +1,135 @@
-import React from 'react';
+/* eslint-disable no-console */
+import React, { useEffect, useState } from 'react';
 import { Loader } from './Loader';
 import { NewCommentForm } from './NewCommentForm';
+import { Post } from '../types/Post';
+import { Comment } from '../types/Comment';
+import { client } from '../utils/fetchClient';
 
-export const PostDetails: React.FC = () => {
-  return (
-    <div className="content" data-cy="PostDetails">
-      <div className="content" data-cy="PostDetails">
-        <div className="block">
-          <h2 data-cy="PostTitle">
-            #18: voluptate et itaque vero tempora molestiae
-          </h2>
+interface PostDetailsProps {
+  post: Post | null;
+}
 
-          <p data-cy="PostBody">
-            eveniet quo quis laborum totam consequatur non dolor ut et est
-            repudiandae est voluptatem vel debitis et magnam
-          </p>
-        </div>
+export const PostDetails: React.FC<PostDetailsProps> = ({ post }) => {
+  const [comments, setComments] = useState<Comment[]>([]);
+  const [loading, setLoading] = useState<boolean>(false);
+  const [error, setError] = useState<string | null>(null);
+  const [showCommentForm, setShowCommentForm] = useState<boolean>(false);
 
-        <div className="block">
-          <Loader />
+  useEffect(() => {
+    if (!post) {
+      return;
+    }
 
-          <div className="notification is-danger" data-cy="CommentsError">
-            Something went wrong
-          </div>
+    setLoading(true);
+    setError(null);
+    client
+      .get<Comment[]>(`/comments?postId=${post.id}`)
+      .then(data => setComments(data))
+      .catch(() => setError('Failed to load comments'))
+      .finally(() => setLoading(false));
+  }, [post]);
 
-          <p className="title is-4" data-cy="NoCommentsMessage">
-            No comments yet
-          </p>
+  const handleDeleteComment = (commentId: number) => {
+    setComments(prev => prev.filter(c => c.id !== commentId));
+    client.delete(`/comments/${commentId}`).catch(err => {
+      console.error('Failed to delete comment', err);
+    });
+  };
 
-          <p className="title is-4">Comments:</p>
+  useEffect(() => {
+    setShowCommentForm(false);
+  }, [post]);
 
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a href="mailto:misha@mate.academy" data-cy="CommentAuthor">
-                Misha Hrynko
-              </a>
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
-            </div>
+  const handleCommentSubmit = async (commentData: {
+    name: string;
+    email: string;
+    body: string;
+  }) => {
+    if (!post) {
+      return;
+    }
 
-            <div className="message-body" data-cy="CommentBody">
-              Some comment
-            </div>
-          </article>
+    try {
+      const newComment = await client.post<Comment>('/comments', {
+        ...commentData,
+        postId: post.id,
+      });
 
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a href="mailto:misha@mate.academy" data-cy="CommentAuthor">
-                Misha Hrynko
-              </a>
+      setComments(prev => [...prev, newComment]);
 
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
-            </div>
-            <div className="message-body" data-cy="CommentBody">
-              One more comment
-            </div>
-          </article>
+      return newComment;
+    } catch (err) {
+      throw err;
+    }
+  };
 
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a href="mailto:misha@mate.academy" data-cy="CommentAuthor">
-                Misha Hrynko
-              </a>
+  if (!post) {
+    return null;
+  }
 
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
-            </div>
+  return (
+    <div className="content" data-cy="PostDetails">
+      <div className="block">
+        <h2 data-cy="PostTitle">{`#${post.id}: ${post.title}`}</h2>
+        <p data-cy="PostBody">{post.body}</p>
+      </div>
 
-            <div className="message-body" data-cy="CommentBody">
-              {'Multi\nline\ncomment'}
-            </div>
-          </article>
+      <div className="block">
+        {loading && <Loader />}
+        {error && (
+          <div className="notification is-danger" data-cy="CommentsError">
+            {error}
+          </div>
+        )}
+        {!loading && !error && comments.length === 0 && (
+          <p className="title is-4" data-cy="NoCommentsMessage">
+            No comments yet
+          </p>
+        )}
+        {!loading && !error && comments.length > 0 && (
+          <>
+            <p className="title is-4">Comments:</p>
+            {comments.map(comment => (
+              <article
+                key={comment.id}
+                className="message is-small"
+                data-cy="Comment"
+              >
+                <div className="message-header">
+                  <a href={`mailto:${comment.email}`} data-cy="CommentAuthor">
+                    {comment.name}
+                  </a>
+                  <button
+                    type="button"
+                    data-cy="CommentDelete"
+                    className="delete is-small"
+                    aria-label="delete"
+                    onClick={() => handleDeleteComment(comment.id)}
+                  >
+                    delete
+                  </button>
+                </div>
+                <div className="message-body" data-cy="CommentBody">
+                  {comment.body}
+                </div>
+              </article>
+            ))}
+          </>
+        )}
 
+        {!loading && !error && !showCommentForm && (
           <button
-            data-cy="WriteCommentButton"
             type="button"
+            data-cy="WriteCommentButton"
             className="button is-link"
+            onClick={() => setShowCommentForm(true)}
           >
             Write a comment
           </button>
-        </div>
+        )}
 
-        <NewCommentForm />
+        {showCommentForm && <NewCommentForm onSubmit={handleCommentSubmit} />}
       </div>
     </div>
   );
diff --git a/src/components/PostsList.tsx b/src/components/PostsList.tsx
index cf90f04b0..e06319bda 100644
--- a/src/components/PostsList.tsx
+++ b/src/components/PostsList.tsx
@@ -1,86 +1,102 @@
-import React from 'react';
+import React, { useEffect, useState } from 'react';
+import { client } from '../utils/fetchClient';
+import { Post } from '../types/Post';
+import { Loader } from './Loader';
 
-export const PostsList: React.FC = () => (
-  <div data-cy="PostsList">
-    <p className="title">Posts:</p>
+interface PostsListProps {
+  userId: number;
+  selectedPost: Post | null;
+  onPostSelect: (post: Post | null) => void;
+}
 
-    <table className="table is-fullwidth is-striped is-hoverable is-narrow">
-      <thead>
-        <tr className="has-background-link-light">
-          <th>#</th>
-          <th>Title</th>
-          {/* eslint-disable-next-line jsx-a11y/control-has-associated-label */}
-          <th> </th>
-        </tr>
-      </thead>
+export const PostsList: React.FC<PostsListProps> = ({
+  userId,
+  selectedPost,
+  onPostSelect,
+}) => {
+  const [posts, setPosts] = useState<Post[]>([]);
+  const [loading, setLoading] = useState<boolean>(true);
+  const [error, setError] = useState<string | null>(null);
 
-      <tbody>
-        <tr data-cy="Post">
-          <td data-cy="PostId">17</td>
+  useEffect(() => {
+    const fetchPosts = async () => {
+      try {
+        setLoading(true);
+        setError(null);
+        const data = await client.get<Post[]>(`/posts?userId=${userId}`);
 
-          <td data-cy="PostTitle">
-            fugit voluptas sed molestias voluptatem provident
-          </td>
+        setPosts(data);
+      } catch (err) {
+        setError('Failed to load posts');
+      } finally {
+        setLoading(false);
+      }
+    };
 
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
+    fetchPosts();
+  }, [userId]);
 
-        <tr data-cy="Post">
-          <td data-cy="PostId">18</td>
+  if (loading) {
+    return <Loader />;
+  }
 
-          <td data-cy="PostTitle">
-            voluptate et itaque vero tempora molestiae
-          </td>
+  if (error) {
+    return (
+      <div className="notification is-danger" data-cy="PostsLoadingError">
+        {error}
+      </div>
+    );
+  }
 
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link"
-            >
-              Close
-            </button>
-          </td>
-        </tr>
+  if (posts.length === 0) {
+    return (
+      <div className="notification is-warning" data-cy="NoPostsYet">
+        No posts yet
+      </div>
+    );
+  }
 
-        <tr data-cy="Post">
-          <td data-cy="PostId">19</td>
-          <td data-cy="PostTitle">adipisci placeat illum aut reiciendis qui</td>
+  return (
+    <div data-cy="PostsList">
+      <p className="title">Posts:</p>
+      <table className="table is-fullwidth is-striped is-hoverable is-narrow">
+        <thead>
+          <tr className="has-background-link-light">
+            <th>#</th>
+            <th>Title</th>
+            <th> </th>
+          </tr>
+        </thead>
+        <tbody>
+          {posts.map(post => {
+            const isSelected =
+              selectedPost && Number(selectedPost.id) === Number(post.id);
 
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
-
-        <tr data-cy="Post">
-          <td data-cy="PostId">20</td>
-          <td data-cy="PostTitle">doloribus ad provident suscipit at</td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
-      </tbody>
-    </table>
-  </div>
-);
+            return (
+              <tr key={post.id} data-cy="Post">
+                <td data-cy="PostId">{post.id}</td>
+                <td data-cy="PostTitle">{post.title}</td>
+                <td className="has-text-right is-vcentered">
+                  <button
+                    type="button"
+                    data-cy="PostButton"
+                    className={`button is-link ${isSelected ? '' : 'is-light'}`}
+                    onClick={() => {
+                      if (isSelected) {
+                        onPostSelect(null);
+                      } else {
+                        onPostSelect(post);
+                      }
+                    }}
+                  >
+                    {isSelected ? 'Close' : 'Open'}
+                  </button>
+                </td>
+              </tr>
+            );
+          })}
+        </tbody>
+      </table>
+    </div>
+  );
+};
diff --git a/src/components/UserSelector.tsx b/src/components/UserSelector.tsx
index c89442841..ba93ff7f4 100644
--- a/src/components/UserSelector.tsx
+++ b/src/components/UserSelector.tsx
@@ -1,40 +1,86 @@
-import React from 'react';
+import React, { useEffect, useRef, useState } from 'react';
+import classNames from 'classnames';
+import { User } from '../types/User';
+import { client } from '../utils/fetchClient';
+
+interface UserSelectorProps {
+  onUserSelect: (userId: number | null) => void;
+}
+
+export const UserSelector: React.FC<UserSelectorProps> = ({ onUserSelect }) => {
+  const [users, setUsers] = useState<User[]>([]);
+  const [selectedUserId, setSelectedUserId] = useState<number | null>(null);
+  const [isDropdownActive, setIsDropdownActive] = useState<boolean>(false);
+
+  const dropdownRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    client.get<User[]>('/users').then(setUsers);
+  }, []);
+
+  const handleUserClick = (userId: number) => {
+    setSelectedUserId(userId);
+    setIsDropdownActive(false);
+    onUserSelect(userId);
+  };
+
+  const toggleDropdown = () => {
+    setIsDropdownActive(prev => !prev);
+  };
+
+  useEffect(() => {
+    const handleClickOutside = (event: MouseEvent) => {
+      if (
+        dropdownRef.current &&
+        !dropdownRef.current.contains(event.target as Node)
+      ) {
+        setIsDropdownActive(false);
+      }
+    };
+
+    document.addEventListener('mousedown', handleClickOutside);
+
+    return () => document.removeEventListener('mousedown', handleClickOutside);
+  }, []);
 
-export const UserSelector: React.FC = () => {
   return (
-    <div data-cy="UserSelector" className="dropdown is-active">
+    <div
+      data-cy="UserSelector"
+      ref={dropdownRef}
+      className={classNames('dropdown', { 'is-active': isDropdownActive })}
+    >
       <div className="dropdown-trigger">
         <button
           type="button"
           className="button"
           aria-haspopup="true"
           aria-controls="dropdown-menu"
+          onClick={toggleDropdown}
         >
-          <span>Choose a user</span>
-
+          <span>
+            {selectedUserId
+              ? users.find(user => user.id === selectedUserId)?.name
+              : 'Choose a user'}
+          </span>
           <span className="icon is-small">
             <i className="fas fa-angle-down" aria-hidden="true" />
           </span>
         </button>
       </div>
-
       <div className="dropdown-menu" id="dropdown-menu" role="menu">
         <div className="dropdown-content">
-          <a href="#user-1" className="dropdown-item">
-            Leanne Graham
-          </a>
-          <a href="#user-2" className="dropdown-item is-active">
-            Ervin Howell
-          </a>
-          <a href="#user-3" className="dropdown-item">
-            Clementine Bauch
-          </a>
-          <a href="#user-4" className="dropdown-item">
-            Patricia Lebsack
-          </a>
-          <a href="#user-5" className="dropdown-item">
-            Chelsey Dietrich
-          </a>
+          {users.map(user => (
+            <a
+              key={user.id}
+              href={`#user-${user.id}`}
+              className={classNames('dropdown-item', {
+                'is-active': selectedUserId === user.id,
+              })}
+              onClick={() => handleUserClick(user.id)}
+            >
+              {user.name}
+            </a>
+          ))}
         </div>
       </div>
     </div>