lab session 4

package.json

@@ -12,9 +12,11 @@
     "@types/react-dom": "18.0.6",
     "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/components/Todo/Todo.tsx

@@ -2,17 +2,21 @@ 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>
   );
 };

src/components/TodoDetail/TodoDetail.tsx

@@ -1,20 +1,28 @@
 import "./TodoDetail.css";
+import { useEffect } from "react";
+import { useDispatch, useSelector } from "react-redux";
+import { useParams } from "react-router";
+import { AppDispatch } from "../../store";
+import { selectTodo, fetchTodo } from "../../store/slices/todo";
 
-type Props = {
-  title: string;
-  content: string;
-};
+const TodoDetail = () => {
+  const { id } = useParams();
+  const dispatch = useDispatch<AppDispatch>();
+  const todoState = useSelector(selectTodo);
+
+  useEffect(() => {
+    dispatch(fetchTodo(Number(id)));
+  }, [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

@@ -2,6 +2,8 @@ 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 { todoActions } from "../../../store/slices/todo";
 
 export default function NewTodo() {
   const [title, setTitle] = useState<string>("");
@@ -16,9 +18,11 @@ export default function NewTodo() {
   //   navigate('/todos')
   // };
 
+  const dispatch = useDispatch();
   const postTodoHandler = () => {
     const data = { title: title, content: content };
     alert("Submitted\n" + data.title + "\n" + data.content);
+    dispatch(todoActions.addTodo(data));
     setSubmitted(true);
   };
 

src/containers/TodoList/TodoList.tsx

@@ -3,6 +3,12 @@ import { NavLink } from "react-router-dom";
 import Todo from "../../components/Todo/Todo";
 import TodoDetail from "../../components/TodoDetail/TodoDetail";
 import "./TodoList.css";
+import { NavLink, useNavigate } from "react-router-dom";
+import { useDispatch, useSelector } from "react-redux";
+import {fetchTodos, selectTodo, todoActions} from "../../store/slices/todo";
+import {useEffect} from "react";
+import axios from 'axios';
+import {AppDispatch} from "../../store";
 
 interface IProps {
   title: string;
@@ -11,44 +17,56 @@ interface IProps {
 type TodoType = { id: number; title: string; content: string; done: boolean };
 
 export default function TodoList(props: IProps) {
+  const dispatch = useDispatch<AppDispatch>();
   const { title } = props;
-  const [selectedTodo, setSelectedTodo] = useState<TodoType | null>(null);
+  const todoState = useSelector(selectTodo);
+  // 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 [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 navigate = useNavigate()
 
   const clickTodoHandler = (td: TodoType) => {
-    if (selectedTodo === td) {
-      setSelectedTodo(null);
-    } else {
-      setSelectedTodo(td);
-    }
+    navigate('/todos/' + td.id);
   };
 
-  const todoDetail = useMemo(() => {
-    return selectedTodo ? (
-      <TodoDetail title={selectedTodo.title} content={selectedTodo.content} />
-    ) : null;
-  }, [selectedTodo]);
+  // const todoDetail = useMemo(() => {
+  //   return selectedTodo ? (
+  //     <TodoDetail title={selectedTodo.title} content={selectedTodo.content} />
+  //   ) : null;
+  // }, [selectedTodo]);
+  useEffect(() => {
+    dispatch(fetchTodos())
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  },[]);
+
+
+  useEffect(() => { axios.get('/api/todo/')
+    .then(result => console.log(result))
+    .catch(e => console.log(e));
+  });
 
   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}_todo`}
               title={td.title}
               done={td.done}
-              clicked={() => clickTodoHandler(td)}
+              // clicked={() => clickTodoHandler(td)}
+              clickDetail={() => clickTodoHandler(td)}
+              clickDone={() => dispatch(todoActions.toggleDone({targetId: td.id}))}
+              clickDelete={() => dispatch(todoActions.deleteTodo({targetId: td.id}))}
             />
           );
         })}
-        {todoDetail}
+        {/* {todoDetail} */}
         <NavLink to="/new-todo" >New Todo</NavLink>
       </div>
     </div>

src/index.tsx

@@ -2,12 +2,16 @@ 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
+  document.getElementById("root") as HTMLElement
 );
 root.render(
   <React.StrictMode>
-    <App />
+    <Provider store={store}>
+      <App />
+    </Provider>
   </React.StrictMode>
 );

src/store/index.ts

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

src/store/slices/todo.ts

@@ -0,0 +1,111 @@
+import {createAsyncThunk, createSlice, PayloadAction} from "@reduxjs/toolkit";
+import axios from "axios";
+import {RootState} from "..";
+
+export interface TodoType {
+  id: number;
+  title: string;
+  content: string;
+  done: boolean;
+}
+
+export interface TodoState {
+  todos: TodoType[];
+  selectedTodo: TodoType | null;
+}
+
+const initialState: TodoState = {
+  todos: [],
+  selectedTodo: null,
+};
+
+export const fetchTodos = createAsyncThunk("todo/fetchTodos", async () => {
+  const response = await axios.get<TodoType[]>("/api/todo/");
+  return response.data;
+});
+
+export const fetchTodo = createAsyncThunk(
+  "todo/fetchTodo",
+  async (id: TodoType["id"], { dispatch }) => {
+    const response = await axios.get(`/api/todo/${id}/`);
+    return response.data ?? null;
+  }
+);
+
+export const postTodo = createAsyncThunk(
+  "todo/postTodo",
+  async (td: Pick<TodoType, "title" | "content">, { dispatch }) => {
+    const response = await axios.post("/api/todo/", td);
+    dispatch(todoActions.addTodo(response.data));
+  }
+);
+
+export const deleteTodo = createAsyncThunk(
+  "todo/deleteTodo",
+  async (id: TodoType["id"], { dispatch }) => {
+    await axios.delete(`/api/todo/${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 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 }>) => {
+      state.todos = state.todos.filter((todo) => {
+        return todo.id !== action.payload.targetId;
+      });
+    },
+    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) => {
+    // Add reducers for additional action types here, and handle loading state as needed
+    builder.addCase(fetchTodos.fulfilled, (state, action) => {
+      // Add user to the state array
+      state.todos = action.payload;
+    });
+    builder.addCase(fetchTodo.fulfilled, (state, action) => {
+      state.selectedTodo = action.payload;
+    });
+    builder.addCase(postTodo.rejected, (_state, action) => {
+      console.error(action.error);
+    });
+  },
+});
+
+export const todoActions = todoSlice.actions;
+export const selectTodo = (state: RootState) => state.todo;
+
+export default todoSlice.reducer;