CRYPTOcoderAS
diff --git a/‎.gitignore
Lines changed: 25 additions & 0 deletions b/‎.gitignore
Lines changed: 25 additions & 0 deletions
diff --git a/‎controllers/loanController.js
Lines changed: 70 additions & 0 deletions b/‎controllers/loanController.js
Lines changed: 70 additions & 0 deletions
diff --git a/‎controllers/userController.js
Lines changed: 24 additions & 0 deletions b/‎controllers/userController.js
Lines changed: 24 additions & 0 deletions
diff --git a/‎models/Loan.js
Lines changed: 31 additions & 0 deletions b/‎models/Loan.js
Lines changed: 31 additions & 0 deletions
diff --git a/‎models/User.js
Lines changed: 12 additions & 0 deletions b/‎models/User.js
Lines changed: 12 additions & 0 deletions
@@ -0,0 +1,25 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+.env
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
@@ -0,0 +1,70 @@
+const Loan = require('../models/Loan');
+const { calculateEMISchedule } = require('../utils/loanCalculations');
+const { createCsvStringifier } = require('csv-writer');
+
+exports.createLoan = async (req, res) => {
+  try {
+    const { userId, disbursementDate, amount, interestRate, tenure } = req.body;
+    const emiSchedule = calculateEMISchedule(amount, interestRate, tenure, disbursementDate);
+    
+    // Calculate total interest
+    const totalInterest = emiSchedule.reduce((sum, emi) => sum + emi.interest, 0);
+
+    // Create loan with EMI schedule including outstanding balance
+    const loan = new Loan({
+      userId,
+      disbursementDate,
+      amount,
+      interestRate,
+      tenure,
+      emiSchedule,
+      totalInterest,
+      totalAmount: amount + totalInterest,
+      status: 'ACTIVE'
+    });
+
+    await loan.save();
+    res.status(201).json(loan);
+  } catch (error) {
+    res.status(500).json({ error: 'Server error' });
+  }
+};
+
+exports.getLoanLedger = async (req, res) => {
+  try {
+    const loan = await Loan.findById(req.params.id).populate('userId');
+    if (!loan) return res.status(404).json({ error: 'Loan not found' });
+    res.json(loan);
+  } catch (error) {
+    res.status(500).json({ error: 'Server error' });
+  }
+};
+
+exports.downloadLedger = async (req, res) => {
+  try {
+    const loan = await Loan.findById(req.params.id).populate('userId');
+    if (!loan) return res.status(404).json({ error: 'Loan not found' });
+
+    // Create CSV content
+    const headers = 'Due Date,EMI Amount,Principal,Interest,Outstanding Balance\n';
+    
+    let remainingBalance = loan.amount;
+    const rows = loan.emiSchedule.map(emi => {
+      const dueDate = new Date(emi.dueDate).toLocaleDateString();
+      remainingBalance -= emi.principal;
+      return `${dueDate},${emi.amount},${emi.principal},${emi.interest},${Math.max(0, Math.round(remainingBalance))}`;
+    }).join('\n');
+
+    const csvContent = headers + rows;
+
+    // Set headers for file download
+    res.setHeader('Content-Type', 'text/csv');
+    res.setHeader('Content-Disposition', `attachment; filename=loan-ledger-${loan._id}.csv`);
+    res.setHeader('Access-Control-Expose-Headers', 'Content-Disposition');
+
+    // Send CSV content
+    res.send(csvContent);
+  } catch (error) {
+    res.status(500).json({ error: 'Server error' });
+  }
+};
@@ -0,0 +1,24 @@
+const User = require('../models/User');
+
+exports.createUser = async (req, res) => {
+  try {
+    const user = new User(req.body);
+    await user.save();
+    res.status(201).json(user);
+  } catch (error) {
+    if (error.code === 11000) {
+      return res.status(400).json({ error: 'Duplicate entry found' });
+    }
+    res.status(500).json({ error: 'Server error' });
+  }
+};
+
+exports.getUser = async (req, res) => {
+  try {
+    const user = await User.findById(req.params.id);
+    if (!user) return res.status(404).json({ error: 'User not found' });
+    res.json(user);
+  } catch (error) {
+    res.status(500).json({ error: 'Server error' });
+  }
+}; 
@@ -0,0 +1,31 @@
+const mongoose = require('mongoose');
+
+const emiSchema = new mongoose.Schema({
+  dueDate: Date,
+  amount: Number,
+  principal: Number,
+  interest: Number,
+  outstandingBalance: Number,
+  isPaid: {
+    type: Boolean,
+    default: false
+  }
+});
+
+const loanSchema = new mongoose.Schema({
+  userId: { type: mongoose.Schema.Types.ObjectId, ref: 'User', required: true },
+  disbursementDate: { type: Date, required: true },
+  amount: { type: Number, required: true },
+  interestRate: { type: Number, required: true },
+  tenure: { type: Number, required: true },
+  emiSchedule: [emiSchema],
+  totalInterest: Number,
+  totalAmount: Number,
+  status: {
+    type: String,
+    enum: ['PENDING', 'ACTIVE', 'COMPLETED', 'DEFAULTED'],
+    default: 'PENDING'
+  }
+}, { timestamps: true });
+
+module.exports = mongoose.model('Loan', loanSchema); 
@@ -0,0 +1,12 @@
+const mongoose = require('mongoose');
+
+const userSchema = new mongoose.Schema({
+  name: { type: String, required: true },
+  dob: { type: Date, required: true },
+  pan: { type: String, required: true, unique: true, uppercase: true },
+  aadhaar: { type: String, required: true, unique: true },
+  gstin: { type: String, required: true, unique: true },
+  udyam: { type: String, required: true, unique: true }
+}, { timestamps: true });
+
+module.exports = mongoose.model('User', userSchema);