hello every it took me 5 hours try to figureout this project but finally i could do it
this is the code for each part
commentsSlice
// Import createAsyncThunk and createSlice here.
import { createAsyncThunk, createSlice } from "@reduxjs/toolkit";
// Create loadCommentsForArticleId here.
export const loadCommentsForArticleId = createAsyncThunk(
"comments/loadCommentsForArticleId",
async (id) => {
const response = await fetch(`api/articles/${id}/comments`);
const json = response.json();
return json;
}
);
// Create postCommentForArticleId here.
export const postCommentForArticleId = createAsyncThunk(
"comments/postCommentForArticleId",
async ({ articleId, comment }) => {
const requestBody = JSON.stringify({comment});
const response = await fetch(`api/articles/${articleId}/comments`, {
method: "POST",
body: requestBody,
});
const json = await response.json();
return json;
}
);
export const commentsSlice = createSlice({
name: "comments",
initialState: {
// Add initial state properties here.
byArticleId: {},
isLoadingComments: false,
failedToLoadComments: false,
createCommentIsPending: false,
failedToCreateComment: false,
},
// Add extraReducers here.
extraReducers: {
"comments/loadCommentsForArticleId/pending": (state, action) => {
state.isLoadingComments = true;
state.failedToLoadComments = false;
},
"comments/loadCommentsForArticleId/fulfilled": (state, action) => {
state.byArticleId = {[action.payload.articleId]: action.payload.comments}
state.isLoadingComments = false;
state.failedToLoadComments = false;
},
"comments/loadCommentsForArticleId/rejected": (state, action) => {
state.failedToLoadComments = true;
state.isLoadingComments = false;
},
"comments/postCommentForArticleId/pending": (state, action) => {
state.createCommentIsPending = true;
state.failedToCreateComment = false;
},
"comments/postCommentForArticleId/rejected": (state, action) => {
state.createCommentIsPending = false;
state.failedToCreateComment = true;
},
"comments/postCommentForArticleId/fulfilled": (state, action) => {
state.byArticleId[action.payload.articleId].push(action.payload)
state.createCommentIsPending = false;
state.failedToCreateComment = false;
},
},
});
export const selectComments = (state) => state.comments.byArticleId;
export const isLoadingComments = (state) => state.comments.isLoadingComments;
export const createCommentIsPending = (state) =>
state.comments.createCommentIsPending;
export default commentsSlice.reducer;
Comments
import React, { useEffect } from "react";
import { useDispatch, useSelector } from "react-redux";
import {
loadCommentsForArticleId,
selectComments,
isLoadingComments,
} from "../comments/commentsSlice";
import { selectCurrentArticle } from "../currentArticle/currentArticleSlice";
import CommentList from "../../components/CommentList";
import CommentForm from "../../components/CommentForm";
const Comments = () => {
const dispatch = useDispatch();
const article = useSelector(selectCurrentArticle);
// Declare additional selected data here.
const comments = useSelector(selectComments);
const commentsAreLoading = useSelector(isLoadingComments);
// Dispatch loadCommentsForArticleId with useEffect here.
useEffect(() => {
if (article !== undefined) {
dispatch(loadCommentsForArticleId(article.id));
}
}, [dispatch, article]);
const commentsForArticleId = article ? comments[article.id] : [];
if (commentsAreLoading) return <div>Loading Comments</div>;
if (!article) return null;
return (
<div className="comments-container">
<h3 className="comments-title">Comments</h3>
<CommentList comments={commentsForArticleId} />
<CommentForm articleId={article.id} />
</div>
);
};
export default Comments;
CommentList
import React from "react";
import Comment from "./Comment";
export default function CommentList({ comments }) {
if (!comments) {
return null;
}
return (
<ul className="comments-list">
{comments.map(comment=> (
<Comment comment={comment} />
))}
</ul>
);
}
CommentsForm
import React, { useState } from 'react';
import { useDispatch, useSelector } from 'react-redux';
import {
createCommentIsPending,
postCommentForArticleId
} from '../features/comments/commentsSlice';
export default function CommentForm({ articleId }) {
const dispatch = useDispatch();
const [comment, setComment] = useState('');
// Declare isCreatePending here.
const isCreatePending = useSelector(createCommentIsPending);
const handleSubmit = (e) => {
e.preventDefault();
// dispatch your asynchronous action here!
dispatch(postCommentForArticleId({articleId, comment}));
setComment('');
};
return (
<form onSubmit={handleSubmit}>
<label for='comment' className='label'>
Add Comment:
</label>
<div id='input-container'>
<input
id='comment'
value={comment}
onChange={(e) => setComment(e.currentTarget.value)}
type='text'
/>
<button
disabled={isCreatePending}
className='comment-button'
>
Submit
</button>
</div>
</form>
);
}
this was hard but finally did it, hope you enjoy it, happy coding!!
Thank you!