Implement todo API

backend/controllers/todos.controller.js

@@ -0,0 +1,75 @@
+// stored here
+let list = [
+  {
+    id: 1,
+    title: "Testing1",
+    completed: false,
+    createdAt: Date.now(),
+  },
+];
+
+// all todo
+const getTodos = (req, res) => {
+  res.status(200).json(list);
+};
+
+// get a todo by id
+const getTodo = (req, res) => {
+
+    const id = Number(req.params.id);
+    const todo = list.find((list) => list.id === id);
+
+    if (!todo) {
+      return res.status(400).json({ message: "Todo not found" });
+    }
+    res.status(200).json(todo);
+  }
+
+
+// new todo
+const createTodos = (req, res) => {
+  if (!req.body.title) {
+    return res.status(400).json({ message: "Title required" });
+  }
+  const newTodo = {
+    id: list.length + 1,
+    title: req.body.title,
+    completed: false,
+    createdAt: Date.now(),
+  };
+  list.push(newTodo);
+  res.status(201).json(newTodo);
+};
+
+// update
+const updateTodo = (req, res) => {
+    const id = Number(req.params.id);
+    const todo = list.find((list) => list.id === id);
+    if (!todo) {
+      return res.status(404).json({ message: "Cannot find a ToDo list" });
+    }
+    if (req.body.title !== undefined) {
+      todo.title = req.body.title;
+    }
+
+    if (req.body.completed !== undefined) {
+      todo.completed = req.body.completed;
+    }
+    res.status(200).json(todo);
+};
+
+// delete
+const deleteTodo = (req, res) => {
+  const id = Number(req.params.id);
+  const index = list.findIndex(list => list.id === id);
+
+  if (index === -1) {
+    return res.status(404).json({ message: "Todo not found" });
+  }
+
+  const deleted = list.splice(index, 1)[0];
+
+  res.status(200).json(deleted);
+};
+
+module.exports = { getTodos, getTodo, createTodos, updateTodo, deleteTodo };

backend/index.js

@@ -1,13 +1,29 @@
 const express = require("express");
 const app = express();
 const PORT = process.env.PORT || 4000;
+const router = express.Router();
+const { getTodos , getTodo, createTodos , updateTodo, deleteTodo } = require("./controllers/todos.controller.js");
+
+// for middleware
+app.use(express.json());
+
+app.use('/api/todos', router);
+
+// routes
+router.get("/", getTodos);
+router.get("/:id", getTodo);
+router.post("/", createTodos);
+router.put("/:id", updateTodo);
+router.delete("/:id", deleteTodo);
 
 // Basic route
-app.get("/", (req, res) => {
-  res.send("Hello from Express!");
-});
+/* app.get("/", (req, res) => {
+  res.send("Hello from Express js!");
+}); */
 
 // Start server
 app.listen(PORT, () => {
   console.log(`Backend is running on http://localhost:${PORT}`);
 });
+
+module.exports = router;