Working on chap03

02_lesson_starter/.prettierrc.json

@@ -3,5 +3,6 @@
   "trailingComma": "es5",
   "tabWidth": 2,
   "semi": true,
-  "printWidth": 80
+  "printWidth": 80,
+  "arrowParens": "always"
 }

02_lesson_starter/package-lock.json

@@ -9,6 +9,7 @@
       "version": "0.1.0",
       "dependencies": {
         "@reduxjs/toolkit": "^1.8.0",
+        "axios": "^1.3.4",
         "date-fns": "^2.29.3",
         "prettier": "^2.8.4",
         "react": "^17.0.2",
@@ -4239,6 +4240,29 @@
         "node": ">=4"
       }
     },
+    "node_modules/axios": {
+      "version": "1.3.4",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-1.3.4.tgz",
+      "integrity": "sha512-toYm+Bsyl6VC5wSkfkbbNB6ROv7KY93PEBBL6xyDczaIHasAiv4wPqQ/c4RjoQzipxRD2W5g21cOqQulZ7rHwQ==",
+      "dependencies": {
+        "follow-redirects": "^1.15.0",
+        "form-data": "^4.0.0",
+        "proxy-from-env": "^1.1.0"
+      }
+    },
+    "node_modules/axios/node_modules/form-data": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.0.tgz",
+      "integrity": "sha512-ETEklSGi5t0QMZuiXoA/Q6vcnxcLQP5vdugSpuAyi6SVGi2clPPp+xgEhuMaHC+zGgn31Kd235W35f7Hykkaww==",
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "mime-types": "^2.1.12"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/axobject-query": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/axobject-query/-/axobject-query-2.2.0.tgz",
@@ -7243,9 +7267,9 @@
       "integrity": "sha512-WIWGi2L3DyTUvUrwRKgGi9TwxQMUEqPOPQBVi71R96jZXJdFskXEmf54BoZaS1kknGODoIGASGEzBUYdyMCBJg=="
     },
     "node_modules/follow-redirects": {
-      "version": "1.14.9",
+      "version": "1.15.2",
-      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.14.9.tgz",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.2.tgz",
-      "integrity": "sha512-MQDfihBQYMcyy5dhRDJUHcw7lb2Pv/TuE6xP1vyraLukNDHKbDxDNaOE3NbCAdKQApno+GPRyo1YAp89yCjK4w==",
+      "integrity": "sha512-VQLG33o04KaQ8uYi2tVNbdrWp1QWxNNea+nmIB4EVM28v0hmP17z7aG1+wAkNzVq4KeXTq3221ye5qTJP91JwA==",
       "funding": [
         {
           "type": "individual",
@@ -12749,6 +12773,11 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/proxy-from-env": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-1.1.0.tgz",
+      "integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg=="
+    },
     "node_modules/psl": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.8.0.tgz",
@@ -18877,6 +18906,28 @@
       "resolved": "https://registry.npmjs.org/axe-core/-/axe-core-4.4.1.tgz",
       "integrity": "sha512-gd1kmb21kwNuWr6BQz8fv6GNECPBnUasepcoLbekws23NVBLODdsClRZ+bQ8+9Uomf3Sm3+Vwn0oYG9NvwnJCw=="
     },
+    "axios": {
+      "version": "1.3.4",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-1.3.4.tgz",
+      "integrity": "sha512-toYm+Bsyl6VC5wSkfkbbNB6ROv7KY93PEBBL6xyDczaIHasAiv4wPqQ/c4RjoQzipxRD2W5g21cOqQulZ7rHwQ==",
+      "requires": {
+        "follow-redirects": "^1.15.0",
+        "form-data": "^4.0.0",
+        "proxy-from-env": "^1.1.0"
+      },
+      "dependencies": {
+        "form-data": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.0.tgz",
+          "integrity": "sha512-ETEklSGi5t0QMZuiXoA/Q6vcnxcLQP5vdugSpuAyi6SVGi2clPPp+xgEhuMaHC+zGgn31Kd235W35f7Hykkaww==",
+          "requires": {
+            "asynckit": "^0.4.0",
+            "combined-stream": "^1.0.8",
+            "mime-types": "^2.1.12"
+          }
+        }
+      }
+    },
     "axobject-query": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/axobject-query/-/axobject-query-2.2.0.tgz",
@@ -21093,9 +21144,9 @@
       "integrity": "sha512-WIWGi2L3DyTUvUrwRKgGi9TwxQMUEqPOPQBVi71R96jZXJdFskXEmf54BoZaS1kknGODoIGASGEzBUYdyMCBJg=="
     },
     "follow-redirects": {
-      "version": "1.14.9",
+      "version": "1.15.2",
-      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.14.9.tgz",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.2.tgz",
-      "integrity": "sha512-MQDfihBQYMcyy5dhRDJUHcw7lb2Pv/TuE6xP1vyraLukNDHKbDxDNaOE3NbCAdKQApno+GPRyo1YAp89yCjK4w=="
+      "integrity": "sha512-VQLG33o04KaQ8uYi2tVNbdrWp1QWxNNea+nmIB4EVM28v0hmP17z7aG1+wAkNzVq4KeXTq3221ye5qTJP91JwA=="
     },
     "fork-ts-checker-webpack-plugin": {
       "version": "6.5.0",
@@ -24910,6 +24961,11 @@
         }
       }
     },
+    "proxy-from-env": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-1.1.0.tgz",
+      "integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg=="
+    },
     "psl": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.8.0.tgz",

02_lesson_starter/package.json

@@ -4,6 +4,7 @@
   "private": true,
   "dependencies": {
     "@reduxjs/toolkit": "^1.8.0",
+    "axios": "^1.3.4",
     "date-fns": "^2.29.3",
     "prettier": "^2.8.4",
     "react": "^17.0.2",

02_lesson_starter/src/features/posts/PostsExcerpt.js

@@ -0,0 +1,19 @@
+import ReactionButtons from './ReactionButtons';
+import PostAuthor from './PostAuthor';
+import TimeAgo from './TimeAgo';
+
+const PostsExcerpt = ({ post }) => {
+  return (
+    <article>
+      <h3>{post.title}</h3>
+      <p>{post.body.substring(0, 100)}</p>
+      <p className="postCredit">
+        <PostAuthor userId={post.userId} />
+        <TimeAgo timestamp={post.date} />
+      </p>
+      <ReactionButtons post={post} />
+    </article>
+  );
+};
+
+export default PostsExcerpt;

02_lesson_starter/src/features/posts/PostsList.js

@@ -1,32 +1,44 @@
-import { useSelector } from 'react-redux';
+import { useDispatch, useSelector } from 'react-redux';
-import { selectAllPosts } from './postsSlice';
+import {
-import PostAuthor from './PostAuthor';
+  fetchPosts,
-import TimeAgo from './TimeAgo';
+  getPostsError,
-import ReactionButtons from './ReactionButton';
+  getPostsStatus,
+  selectAllPosts,
+} from './postsSlice';
+import PostsExcerpt from './PostsExcerpt';
+import { useEffect } from 'react';
 
 const PostsList = () => {
-  const posts = useSelector(selectAllPosts);
+  const dispatch = useDispatch();
 
+  const posts = useSelector(selectAllPosts);
+  const postStatus = useSelector(getPostsStatus);
+  const error = useSelector(getPostsError);
+
+  useEffect(() => {
+    if (postStatus === 'idle') {
+      dispatch(fetchPosts());
+    }
+  }, [postStatus, dispatch]);
+
+  let content;
+  if (postStatus === 'loading') {
+    content = <p>"Loading...</p>;
+  } else if (postStatus === 'succeeded') {
     const orderedPosts = posts
       .slice()
       .sort((a, b) => b.date.localeCompare(a.date));
-
+    content = orderedPosts.map((post) => (
-  const renderedPosts = orderedPosts.map((post) => (
+      <PostsExcerpt key={post.id} post={post} />
-    <article key={post.id}>
-      <h3>{post.title}</h3>
-      <p>{post.content.substring(0, 100)}</p>
-      <p className="postCredit">
-        <PostAuthor userId={post.userId} />
-        <TimeAgo timestamp={post.date} />
-      </p>
-      <ReactionButtons post={post} />
-    </article>
     ));
+  } else if (postStatus === 'failed') {
+    content = <p>{error}</p>;
+  }
 
   return (
     <section>
       <h2>Posts</h2>
-      {renderedPosts}
+      {content}
     </section>
   );
 };

02_lesson_starter/src/features/posts/postsSlice.js

@@ -1,42 +1,43 @@
-import { createSlice, nanoid } from "@reduxjs/toolkit";
+import { createSlice, nanoid, createAsyncThunk } from '@reduxjs/toolkit';
-import { sub } from "date-fns";
+import { sub } from 'date-fns';
+import axios from 'axios';
 
-const initialState = [
+const POSTS_URL = 'https://jsonplaceholder.typicode.com/posts';
-  {
+
-    id: "1",
+const initialState = {
-    title: "Learning Redux Toolkit",
+  posts: [],
-    content: "I've heard good things.",
+  status: 'idle', // 'idle' | 'loading' | 'succeeded' | 'failed'
-    date: sub(new Date(), { minutes: 10 }).toISOString(),
+  error: null,
-    reactions: {
+};
-      thumbsUp: 0,
+
-      wow: 0,
+export const fetchPosts = createAsyncThunk('posts/fetchPosts', async () => {
-      heart: 0,
+  try {
-      rocket: 0,
+    const response = await axios.get(POSTS_URL);
-      coffee: 0,
+    return [...response.data];
-    },
+  } catch (err) {
-  },
+    return err.message;
-  {
+  }
-    id: "2",
+});
-    title: "Slice...",
+
-    content: "The more I say slice, the more I want pizza.",
+export const addNewPost = createAsyncThunk(
-    date: sub(new Date(), { minutes: 5 }).toISOString(),
+  'posts/addNewPost',
-    reactions: {
+  async (initialPost) => {
-      thumbsUp: 0,
+    try {
-      wow: 0,
+      const response = await axios.post(POSTS_URL, initialPost);
-      heart: 0,
+      return response.data;
-      rocket: 0,
+    } catch (err) {
-      coffee: 0,
+      return err.message;
-    },
+    }
-  },
+  }
-];
+);
 
 const postsSlice = createSlice({
-  name: "posts",
+  name: 'posts',
   initialState,
   reducers: {
     postAdded: {
       reducer: (state, action) => {
-        state.push(action.payload);
+        state.posts.push(action.payload);
       },
       prepare(title, content, userId) {
         // adding new post also need userid (author)
@@ -60,15 +61,46 @@ const postsSlice = createSlice({
     },
     reactionAdded(state, action) {
       const { postId, reaction } = action.payload;
-      const existingPost = state.find((post) => post.id === postId);
+      const existingPost = state.posts.find((post) => post.id === postId);
       if (existingPost) {
         existingPost.reactions[reaction]++; // this kind of immer action can only happen in slice
       }
     },
   },
+  extraReducers(builder) {
+    // use traditional redux way of defining reducers
+    builder
+      .addCase(fetchPosts.pending, (state, action) => {
+        state.status = 'loading';
+      })
+      .addCase(fetchPosts.fulfilled, (state, action) => {
+        state.status = 'succeeded';
+        // Adding date and reactions
+        let min = 1;
+        const loadedPosts = action.payload.map((post) => {
+          post.date = sub(new Date(), { minutes: min++ }).toISOString();
+          post.reactions = {
+            thumbsUp: 0,
+            horray: 0,
+            heart: 0,
+            rocket: 0,
+            eyes: 0,
+          };
+          return post;
+        });
+        // Add an fetched posts to the array
+        state.posts = state.posts.concat(loadedPosts);
+      })
+      .addCase(fetchPosts.rejected, (state, action) => {
+        state.status = 'failed';
+        state.error = action.error.message;
+      });
+  },
 });
 
-export const selectAllPosts = (state) => state.posts;
+export const selectAllPosts = (state) => state.posts.posts; // first posts is meaning name of the slice
+export const getPostsStatus = (state) => state.posts.status;
+export const getPostsError = (state) => state.posts.error;
 
 export const { postAdded, reactionAdded } = postsSlice.actions;
 

02_lesson_starter/src/features/users/usersSlice.js

@@ -1,14 +1,28 @@
-import { createSlice } from "@reduxjs/toolkit";
+import { createSlice, createAsyncThunk } from '@reduxjs/toolkit';
-const initialState = [
+import axios from 'axios';
-  { id: "0", name: "Dude Lebowski" },
+
-  { id: "1", name: "Neil Young" },
+const USERS_URL = 'https://jsonplaceholder.typicode.com/users';
-  { id: "2", name: "Dave Gray" },
+
-];
+const initialState = [];
+
+export const fetchUsers = createAsyncThunk('users/fetchUsers', async () => {
+  try {
+    const response = await axios.get(USERS_URL);
+    return [...response.data];
+  } catch (err) {
+    return err.message;
+  }
+});
 
 const usersSlice = createSlice({
-  name: "users",
+  name: 'users',
   initialState,
   reducers: {},
+  extraReducers(builder) {
+    builder.addCase(fetchUsers.fulfilled, (state, action) => {
+      return action.payload;
+    });
+  },
 });
 
 // Selectors

02_lesson_starter/src/index.js

@@ -4,6 +4,9 @@ import './index.css';
 import App from './App';
 import { store } from './app/store';
 import { Provider } from 'react-redux';
+import { fetchUsers } from './features/users/usersSlice';
+
+store.dispatch(fetchUsers()); // Fetch users before rendering page
 
 ReactDOM.render(
   <React.StrictMode>