Assignment Completed

08-node-basics/asg-file-sorter/file-sorter.js

@@ -3,4 +3,4 @@
  *  1. Read files 1.txt, 2.txt, 3.txt and all the numbers inside them 
  *  2. Sort the numbers in ascending order
  *  3. Write the sorted numbers to a file called sorted.txt
- */
+ */

09-node-express-server/task-list-http-server/server.js

@@ -1,19 +1,27 @@
-const express = require('express')
-const app = express()
+const express = require("express");
+const fs=require('fs');
+const app = express();
 
-/** 
- * Imagine there is a list of tasks like this: 
- *  1. Enroll to Scaler 
+app.use(express.json({ extended: true }));
+var taskList;
+const fileName="tasks.json";
+
+
+read();
+
+/**
+ * Imagine there is a list of tasks like this:
+ *  1. Enroll to Scaler
  *  2. Learn Node.js
  *  3. Learn React.js
  *  4. Get a job
  *  5. Get a girlfriend/boyfriend
- *  
+ *
  */
 
 /**
  * When GET request is sent to 127.0.0.1:4114/tasks,
- * response will be 
+ * response will be
  *      [
  *         'Enroll to Scaler',
  *         'Learn Node.js',
@@ -22,45 +30,78 @@ const app = express()
  *         'Get a girlfriend/boyfriend'
  *      ]
  */
-app.get('/tasks', (req, res) => {
 
-})
+
+app.get("/tasks", (req, res) => {
+  res.send(taskList);
+  console.log(taskList);
+});
 
 /**
  * If GET request is sent to 127.0.0.1:4114/tasks/1,
- * Then response will be 
- * 
+ * Then response will be
+ *
  *     'Enroll to Scaler'
- * 
+ *
  * If GET request is sent to 127.0.0.1:4114/tasks/2
  * Then response will be
- * 
+ *
  *    'Learn Node.js'
  */
 
-app.get('/tasks/:id', (req, res) => {
+app.get("/tasks/:id", (req, res) => {
+  // BONUS: figure out how `:id` part works
+  const id=Number(req.params.id);
+  if(isNaN(id)){
+    console.log(id);
+    return res.status(400).send('Invalid id');
+  }
 
-    // BONUS: figure out how `:id` part works 
-})
+  if(id<=0 || id>taskList.length){
+    return res.status(404).send('Task not found');
+  }else
+     res.send(taskList[id]);
+});
 
+/**
+ * If POST request is sent to
+});
+**/
 app.delete('/tasks/:id', (req, res) => {
 
     // Delete task with given id
+    const id=Number(req.params.id);
+    if(isNaN(id)){
+      console.log(id);
+      return res.status(400).send('Invalid id');
+    }
+    else{
+      delete taskList[id];
+      write(taskList);
+      res.send("Deleted task with id :"+id +" successfully");
+    }
 })
 
 /**
  * When POST request is sent to 127.0.0.1:4114/tasks,
  * with the body:
- *          { "task": "Complete NodeJS Assignment" } 
- * 
+ *          { "task": "Complete NodeJS Assignment" }
+ *
  * Then a new task will be added to the list.
- *   
+ *
  *   6. Complete NodeJS Assignment
  */
 
-app.post('/tasks', (req, res) => {
-
-})
+app.post("/tasks", (req, res) => {
+  if (req.body.task == undefined) {
+    res.send("Please add a body to add a task. The format should be {\"task\": \"task name\"}");
+  } else {
+    const index=Object.keys(taskList).length + 1;
+    taskList[index] = req.body.task;
+    write(taskList);
+    res.send("A new task " + req.body.task + " has been added to the list");
+  }
+});
 
 app.listen(4114, () => {
     console.log('server started on http://127.0.0.1:4114')
@@ -72,4 +113,26 @@ app.listen(4114, () => {
  *  - Update the file every time a new task is created/deleted
  *  - When server is restarted, old tasks should be available 
  *     - Read the file at server start to load the saved tasks
- */
+ */
+
+
+
+
+ function read(){
+  fs.readFile(fileName, (err, data) => {
+    if (err) {
+      throw err;
+    } else {
+      taskList=JSON.parse(data);
+      console.log(taskList);
+    }
+  });
+}
+
+function write(data) {
+  fs.writeFile(fileName, JSON.stringify(data), (err) => {
+    if (err) {
+      throw err;
+    }
+  });
+}

09-node-express-server/task-list-http-server/tasks.json

@@ -0,0 +1 @@
+{"1":"Enroll to Scaler","2":"Learn Node.js","3":"Learn React.js","4":"Get a job","5":"Get a girlfriend","6":"Marry Her"}