Lab 4

package.json

@@ -1,20 +1,25 @@
 {
-  "name": "swpp-p3-react-tutorial",
+  "name": "todo",
   "version": "0.1.0",
-  "private": true,
+  "private": false,
+  "proxy": "http://127.0.0.1:8000",
   "dependencies": {
+    "@reduxjs/toolkit": "^1.8.5",
     "@testing-library/jest-dom": "5.16.5",
     "@testing-library/react": "13.3.0",
     "@testing-library/user-event": "13.5.0",
     "@types/jest": "27.5.2",
     "@types/node": "16.11.56",
     "@types/react": "18.0.17",
     "@types/react-dom": "18.0.6",
+    "axios": "^0.27.2",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
+    "react-redux": "^8.0.4",
     "react-router": "6.3.0",
     "react-router-dom": "6.3.0",
     "react-scripts": "5.0.1",
+    "redux": "^4.2.0",
     "typescript": "4.7.4",
     "web-vitals": "2.1.4"
   },

src/App.tsx

@@ -22,7 +22,6 @@ function App() {
 
 export default App;
 
-<div className="TodoList"></div>;
 /* actually, it uses className, not class to avoid collision btw JS class
  * this syntax is compiled to React.createElement(‘div’, {className: ‘TodoList’})
  * by React Transpiler.

src/axios/axios_ex.js

@@ -0,0 +1,5 @@
+const axios = require('axios');
+
+axios.get('/api/todos')
+  .then(response => console.log(response))
+  .catch(error => console.log(error));

src/components/Todo/Todo.tsx

@@ -2,18 +2,23 @@ import "./Todo.css";
 
 interface IProps {
   title: string;
-  clicked?: React.MouseEventHandler<HTMLDivElement>; // Defined by React
+  clickDetail?: React.MouseEventHandler<HTMLDivElement>; // Defined by React
+  clickDone?: () => void;
+  clickDelete?: () => void;
   done: boolean;
 }
 
 const Todo = (props: IProps) => {
   return (
     <div className="Todo">
-      <div className={`text ${props.done && "done"}`} onClick={props.clicked}>
+      <div className={`text ${props.done && "done"}`} onClick={props.clickDetail}>
         {props.title}
       </div>
       {props.done && <div className="done-mark">&#x2713;</div>}
+      <button onClick={props.clickDone}>{(props.done) ? 'Undone' : 'Done'}</button>
+      <button onClick={props.clickDelete}>Delete</button>
     </div>
   );
-};
+}
+
 export default Todo;

src/components/TodoDetail/TodoDetail.tsx

@@ -1,20 +1,30 @@
 import "./TodoDetail.css";
+import {useNavigate, useParams} from "react-router";
+import {fetchTodo, selectTodo, todoActions, TodoType} from "../../store/slices/todo";
+import {useDispatch, useSelector} from "react-redux";
+import {useEffect} from "react";
+import {AppDispatch} from "../../store";
 
-type Props = {
-  title: string;
-  content: string;
-};
+const TodoDetail = () => {
+  const { id } = useParams();
+  const dispatch = useDispatch<AppDispatch>();
+
+  const todoState = useSelector(selectTodo);
+
+  useEffect(() => {
+    dispatch(fetchTodo(Number(id)));
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [id]);
 
-const TodoDetail = (props: Props) => {
   return (
     <div className="TodoDetail">
       <div className="row">
         <div className="left">Name:</div>
-        <div className="right">{props.title}</div>
+        <div className="right">{todoState.selectedTodo?.title}</div>
       </div>
       <div className="row">
         <div className="left">Content:</div>
-        <div className="right">{props.content}</div>
+        <div className="right">{todoState.selectedTodo?.content}</div>
       </div>
     </div>
   );

src/containers/TodoList/NewTodo/NewTodo.tsx

@@ -2,12 +2,17 @@ import { useState } from "react";
 import { Navigate } from "react-router-dom";
 // import { useNavigate } from "react-router-dom";
 import "./NewTodo.css";
+import {useDispatch} from "react-redux";
+import {postTodo, todoActions} from "../../../store/slices/todo";
+import {AppDispatch} from "../../../store";
 
 export default function NewTodo() {
   const [title, setTitle] = useState<string>("");
   const [content, setContent] = useState<string>("");
   const [submitted, setSubmitted] = useState<boolean>(false);
 
+  const dispatch = useDispatch<AppDispatch>();
+
   // const navigate = useNavigate()
   // const postTodoHandler = () => {
   //   const data = { title: title, content: content };
@@ -16,10 +21,14 @@ export default function NewTodo() {
   //   navigate('/todos')
   // };
 
-  const postTodoHandler = () => {
+  const postTodoHandler = async () => {
     const data = { title: title, content: content };
-    alert("Submitted\n" + data.title + "\n" + data.content);
-    setSubmitted(true);
+    const result = await dispatch(postTodo(data));
+    console.log(result)
+    if (result.payload) {
+      setSubmitted(true); }else{
+      alert("Error on post Todo");
+    }
   };
 
   if (submitted) {

src/containers/TodoList/TodoList.tsx

@@ -1,8 +1,13 @@
-import { useMemo, useState } from "react";
+import {useEffect, useMemo, useState} from "react";
 import { NavLink } from "react-router-dom";
 import Todo from "../../components/Todo/Todo";
 import TodoDetail from "../../components/TodoDetail/TodoDetail";
 import "./TodoList.css";
+import {useDispatch, useSelector} from "react-redux";
+import {deleteTodo, fetchTodos, selectTodo, todoActions, toggleDone} from "../../store/slices/todo";
+import {useNavigate} from "react-router";
+import axios from "axios";
+import {AppDispatch} from "../../store";
 
 interface IProps {
   title: string;
@@ -14,37 +19,37 @@ export default function TodoList(props: IProps) {
   const { title } = props;
   const [selectedTodo, setSelectedTodo] = useState<TodoType | null>(null);
 
-  const [todos, setTodos] = useState<TodoType[]>([
-    { id: 1, title: "SWPP", content: "take swpp class", done: true },
-    { id: 2, title: "Movie", content: "watch movie", done: false },
-    { id: 3, title: "Dinner", content: "eat dinner", done: false },
-  ]);
-
-  const clickTodoHandler = (td: TodoType) => {
-    if (selectedTodo === td) {
-      setSelectedTodo(null);
-    } else {
-      setSelectedTodo(td);
-    }
-  };
+  const todoState = useSelector(selectTodo);
+  const dispatch = useDispatch<AppDispatch>();
+  const navigate = useNavigate();
 
   const todoDetail = useMemo(() => {
     return selectedTodo ? (
-      <TodoDetail title={selectedTodo.title} content={selectedTodo.content} />
+      <TodoDetail/>
     ) : null;
   }, [selectedTodo]);
 
+  const clickTodoHandler = (td: TodoType) => {
+    navigate('/todos/' + td.id)
+  };
+
+  useEffect(() => {
+    dispatch(fetchTodos());
+  }, []);
+
   return (
     <div className="TodoList">
       <div className="title">{title}</div>
       <div className="todos">
-        {todos.map((td) => {
+        {todoState.todos.map((td) => {
           return (
             <Todo
-              key={`${td.id}_todo`}
+              key={td.id}
               title={td.title}
               done={td.done}
-              clicked={() => clickTodoHandler(td)}
+              clickDetail={() => clickTodoHandler(td)}
+              clickDone={() => dispatch(toggleDone(td.id))}
+              clickDelete={() => dispatch(deleteTodo(td.id))}
             />
           );
         })}

src/index.tsx

@@ -2,12 +2,15 @@ import React from 'react';
 import ReactDOM from 'react-dom/client';
 import './index.css';
 import App from './App';
+import {Provider} from "react-redux";
+import {store} from "./store";
 
 const root = ReactDOM.createRoot(
   document.getElementById('root') as HTMLElement
 );
+
 root.render(
   <React.StrictMode>
-    <App />
+    <Provider store={store}><App /></Provider>
   </React.StrictMode>
 );

src/redux-basics.js

@@ -0,0 +1,19 @@
+const { configureStore } = require('@reduxjs/toolkit');  // load module in Node.js
+const initialState = { number: 0 }; // default state
+
+const myReducer = (state = initialState, action) => {
+  if (action.type === 'ADD') { return ({ ...state, number: state.number + 1}); }
+  else if (action.type === 'ADD_VALUE') {
+    return ({...state, number: state.number + action.value});
+  }
+  return state;
+}
+
+const store = configureStore({ reducer: myReducer });
+
+store.subscribe(() => {
+  console.log('[Subscription]', store.getState());
+});
+
+store.dispatch({ type: 'ADD' });
+store.dispatch({ type: 'ADD_VALUE', value: 5 });

src/store/index.ts

@@ -0,0 +1,11 @@
+import todoReducer from "./slices/todo";
+
+// src/store/index.ts
+import { configureStore } from "@reduxjs/toolkit";
+
+export const store = configureStore(
+  { reducer: {todo: todoReducer}}
+); // TODO
+
+export type RootState = ReturnType<typeof store.getState>;
+export type AppDispatch = typeof store.dispatch;

src/store/slices/todo.ts

@@ -0,0 +1,103 @@
+import {createAsyncThunk, createSlice, PayloadAction} from "@reduxjs/toolkit";
+import { RootState } from "..";
+import axios from "axios";
+
+export interface TodoType { id: number; title: string; content: string; done: boolean; }
+export interface TodoState { todos: TodoType[]; selectedTodo: TodoType | null; }
+const initialState: TodoState = {
+  todos: [
+    { id: 1, title: "SWPP", content: "take swpp class", done: true },
+    { id: 3, title: "Dinner", content: "eat dinner", done: false },
+  ], selectedTodo: null,
+}; // continue
+
+export const todoSlice = createSlice({
+  name: "todo",
+  initialState,
+  reducers: {
+    getAll: (state, action: PayloadAction<{ todos: TodoType[] }>) => {},
+    getTodo: (state, action: PayloadAction<{ targetId: number }>) => {
+      const target = state.todos.find((td) => td.id === action.payload.targetId);
+      state.selectedTodo = target ?? null
+    },
+    toggleDone: (state, action: PayloadAction<{ targetId: number }>) => {
+      const todo = state.todos.find(
+        (value) => value.id === action.payload.targetId
+      );
+      if (todo) {
+        todo.done = !todo.done;
+      } },
+    deleteTodo: (state, action: PayloadAction<{ targetId: number }>) => {
+      const deleted = state.todos.filter((todo) => {
+        return todo.id !== action.payload.targetId;
+      });
+      state.todos = deleted;
+    },
+    addTodo: (
+      state,
+      action: PayloadAction<{ title: string; content: string }> )=>{
+      const newTodo = {
+        id: state.todos[state.todos.length - 1].id + 1, // temporary
+        title: action.payload.title,
+        content: action.payload.content,
+        done: false,
+      };
+      state.todos.push(newTodo);
+    },
+  },
+  extraReducers: (builder) => {
+    builder.addCase(fetchTodos.fulfilled, (state, action) => {
+      state.todos = action.payload;
+    });
+    builder.addCase(postTodo.rejected, (_state, action) => {
+      console.error(action.error);
+    });
+    builder.addCase(fetchTodo.fulfilled, (state, action) => {
+      state.selectedTodo = action.payload;
+    });
+  },
+});
+
+export const fetchTodo = createAsyncThunk( "todo/fetchTodo",
+  async (id: TodoType["id"], { dispatch }) => {
+    const response = await axios.get(`/api/todo/${id}/`);
+    return response.data ?? null;
+  }
+);
+
+export const fetchTodos = createAsyncThunk(
+  "todo/fetchTodos",
+  async () => {
+    const response = await axios.get<TodoType[]>("/api/todo/");
+    return response.data;
+  }
+);
+
+export const postTodo = createAsyncThunk(
+  "todo/postTodo",
+  async (td: Pick<TodoType, "title" | "content">, { dispatch }) => {
+    const response = await axios.post("/api/todo/", td);
+    dispatch(todoActions.addTodo(response.data));
+    return response.data;
+  }
+);
+
+export const deleteTodo = createAsyncThunk(
+  "todo/deleteTodo",
+  async (id: TodoType["id"], { dispatch }) => {
+    await axios.delete(`/api/todo/${id}/`);
+    dispatch(todoActions.deleteTodo({ targetId: id }));
+  }
+);
+
+export const toggleDone = createAsyncThunk(
+  "todo/toggleDone",
+  async (id: TodoType["id"], { dispatch }) => {
+    await axios.put(`/api/todo/${id}/`);
+    dispatch(todoActions.toggleDone({ targetId: id }));
+  }
+);
+
+export const todoActions = todoSlice.actions;
+export const selectTodo = (state: RootState) => state.todo;
+export default todoSlice.reducer;