From a8ee589622496938aa1cd55fdeb176850ed4831c Mon Sep 17 00:00:00 2001
From: Vamsi Gajula <gajulavamsi90@gmail.com>
Date: Mon, 8 Sep 2025 06:50:55 +0530
Subject: [PATCH] Assignment completed

---
 index.js | 105 ++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 84 insertions(+), 21 deletions(-)

diff --git a/index.js b/index.js
index e189e725..457ae23b 100644
--- a/index.js
+++ b/index.js
@@ -13,7 +13,7 @@ const QUESTIONS = [{
     }]
 }];
 
-
+app.use(express.json());
 const SUBMISSION = [
 
 ]
@@ -21,53 +21,116 @@ const SUBMISSION = [
 app.post('/signup', function(req, res) {
   // Add logic to decode body
   // body should have email and password
+  try{
+    const {email, password} = req.body;
+    if(!email || !password){
+      return res.status(400).send('Email and password are required');
+    }
+    const userExists = USERS.find(user => user.email === email);
+    if (userExists) {
+      return res.status(400).send('User already exists');
+    }
+    //Store email and password (as is for now) in the USERS array above (only if the user with the given email doesnt exist)
+    USERS.push({email, password});
+  
+    // return back 200 status code to the client
+    res.status(200).send('User registered successfully');
+  } catch (error) {
+    return res.status(400).send('Invalid request');
+  }
 
-
-  //Store email and password (as is for now) in the USERS array above (only if the user with the given email doesnt exist)
-
-
-  // return back 200 status code to the client
-  res.send('Hello World!')
 })
 
 app.post('/login', function(req, res) {
   // Add logic to decode body
   // body should have email and password
-
-  // Check if the user with the given email exists in the USERS array
-  // Also ensure that the password is the same
-
-
-  // If the password is the same, return back 200 status code to the client
-  // Also send back a token (any random string will do for now)
-  // If the password is not the same, return back 401 status code to the client
-
-
-  res.send('Hello World from route 2!')
+  try{
+    const {email, password} = req.body;
+    if(!email || !password){
+      return res.status(400).send('Email and password are required');
+    }
+    // Check if the user with the given email exists in the USERS array
+    // Also ensure that the password is the same
+    const user = USERS.find(user => user.email === email);
+    if (!user || user.password !== password) {
+      return res.status(401).send('Invalid email or password');
+    }
+  
+    // If the password is the same, return back 200 status code to the client
+    // Also send back a token (any random string will do for now)
+    // If the password is not the same, return back 401 status code to the client
+    const token = Math.random().toString(36).substring(2);
+    res.status(200).send({ message: 'Login successful', token });
+  } catch (error) {
+    return res.status(400).send('Invalid request');
+  }
 })
 
 app.get('/questions', function(req, res) {
 
   //return the user all the questions in the QUESTIONS array
-  res.send("Hello World from route 3!")
+  res.status(200).json(QUESTIONS);
 })
 
 app.get("/submissions", function(req, res) {
    // return the users submissions for this problem
-  res.send("Hello World from route 4!")
+  res.status(200).json(SUBMISSION);
 });
 
 
 app.post("/submissions", function(req, res) {
    // let the user submit a problem, randomly accept or reject the solution
    // Store the submission in the SUBMISSION array above
-  res.send("Hello World from route 4!")
+  try{
+    const {problemTitle, solution} = req.body;
+    if(!problemTitle || !solution){
+      return res.status(400).send('Problem title and solution are required');
+    }
+    const question = QUESTIONS.find(question => question.title === problemTitle);
+    if (!question) {
+      return res.status(400).send('Problem not found');
+    }
+    const isAccepted = Math.random() < 0.5; // Randomly accept or reject
+    SUBMISSION.push({problemTitle, solution, status: isAccepted ? 'Accepted' : 'Rejected'});
+    res.status(200).send({ message: `Submission ${isAccepted ? 'Accepted' : 'Rejected'}` }); 
+  } catch (error) {
+    return res.status(400).json({error: error.message});
+  }
+
 });
 
 // leaving as hard todos
 // Create a route that lets an admin add a new problem
 // ensure that only admins can do that.
 
+app.post('/problems', function(req, res) {
+  // Add logic to decode body
+  // body should have title, description and testCases
+  try{
+    const {title, description, testCases} = req.body;
+    if(!title || !description || !testCases){
+      return res.status(400).send('Title, description and testCases are required');
+    }
+    const problemExists = QUESTIONS.find(question => question.title === title);
+    if (problemExists) {
+      return res.status(400).send('Problem with this title already exists');
+    }
+    //Store the new problem in the QUESTIONS array above
+    if (!Array.isArray(testCases) || testCases.length === 0) {
+      return res.status(400).send('testCases should be a non-empty array');
+    }
+    for (const testCase of testCases) {
+      if (!testCase.input || !testCase.output) {
+        return res.status(400).send('Each test case should have input and output');
+      }
+    }
+    QUESTIONS.push({title, description, testCases});
+    res.status(200).send('Problem added successfully');
+  } catch (error) {
+    return res.status(400).send('Invalid request');
+  }
+});
+
 app.listen(port, function() {
   console.log(`Example app listening on port ${port}`)
 })
\ No newline at end of file