Todo API - CJ nicko rosales/1 2 years backend

backend/controllers/todosControllers.js

@@ -0,0 +1,97 @@
+const todos = require("../data/data.js");
+
+// gets all todo items
+exports.getAllTodos = (req, res) => {
+  res.json(todos);
+};
+
+// gets a todo item by id
+exports.getTodoById = (req, res) => {
+  const id = parseInt(req.params.id);
+  if (isNaN(id)) {
+    return res.status(400).json({ message: "Invalid ID" });
+  }
+  const todo = todos.find((t) => {
+    return t.id === id;
+  });
+
+  if (!todo) {
+    return res.status(400).json({ message: "Todo not found" });
+  }
+
+  res.json(todo);
+};
+
+// creates a new todo item
+exports.createTodo = (req, res) => {
+  const { title } = req.body;
+
+  if (!title) {
+    return res.status(404).json({ message: "Title is required" });
+  }
+
+  const date = new Date();
+  const newTodo = {
+    id: todos.length ? todos[todos.length - 1].id + 1 : 1,
+    title: title,
+    completed: false,
+    createdAt: date.toLocaleDateString("en-US"),
+  };
+
+  todos.push(newTodo);
+  res.status(201).json(newTodo);
+};
+
+// updates the todo item
+exports.updateTodoById = (req, res) => {
+  const id = parseInt(req.params.id);
+  if (isNaN(id)) {
+    return res.status(400).json({ message: "Invalid ID" });
+  }
+
+  const todo = todos.find((t) => {
+    return t.id === id;
+  });
+
+  if (!todo) {
+    return res.status(404).json({ message: "Todo not found" });
+  }
+
+  const { title, completed } = req.body;
+
+  //updates todo Item if values are provided
+  if (title !== undefined) {
+    todo.title = title;
+  }
+  if (completed !== undefined) {
+    if (typeof completed !== "boolean") {
+      // validation if completed is boolean
+      return res.status(400).json({ message: "Completed must be boolean" });
+    }
+    todo.completed = completed;
+  }
+  res.json(todo);
+};
+
+// deletes todo item by id
+exports.deleteTodoById = (req, res) => {
+  const id = parseInt(req.params.id);
+
+  if (isNaN(id)) {
+    return res.status(400).json({ message: "Invalid ID" });
+  }
+  const todoIndex = todos.findIndex((t) => {
+    return t.id === id;
+  });
+
+  if (todoIndex === -1) {
+    return res.status(404).json({ message: "Todo not found" });
+  }
+
+  const deletedTodo = todos.splice(todoIndex, 1);
+
+  res.json({
+    message: "Deleted Todo successfully.",
+    todo: deletedTodo[0],
+  });
+};

backend/data/data.js

@@ -0,0 +1,18 @@
+// sample data
+
+const todos = [
+  {
+    id: 1,
+    title: "Cook pasta",
+    completed: true,
+    createdAt: "01-01-2026",
+  },
+  {
+    id: 2,
+    title: "Do homework",
+    completed: true,
+    createdAt: "03-23-2026",
+  },
+];
+
+module.exports = todos;

backend/routes/todos.js

@@ -0,0 +1,21 @@
+const express = require("express");
+const router = express.Router();
+const {
+  getAllTodos,
+  getTodoById,
+  createTodo,
+  updateTodoById,
+  deleteTodoById,
+} = require("../controllers/todosControllers.js");
+
+router.get("/", getAllTodos);
+
+router.get("/:id", getTodoById);
+
+router.post("/", createTodo);
+
+router.put("/:id", updateTodoById);
+
+router.delete("/:id", deleteTodoById);
+
+module.exports = router;

backend/index.js → backend/server.js

@@ -1,11 +1,13 @@
+// todo API
+
 const express = require("express");
 const app = express();
-const PORT = process.env.PORT || 4000;
+const PORT = process.env.PORT || 10533;
+const todoRoutes = require("./routes/todos.js");
 
-// Basic route
-app.get("/", (req, res) => {
-  res.send("Hello from Express!");
-});
+app.use(express.json());
+
+app.use("/api/todos", todoRoutes);
 
 // Start server
 app.listen(PORT, () => {