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feat: Add/update bank processor for HDFC #4

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7 changes: 7 additions & 0 deletions BANK.js
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const BANK = {
BOB: "bob",
IOB: "iob",
HDFC: "hdfc",
}

module.exports = BANK;
229 changes: 229 additions & 0 deletions Services/BankStatementProcessor/bankStatementProcessor-HDFC.js
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/**
* Generated by Gemini AI - Attempt 2
* Processes bank statement data from Excel
* @param {Array} rawData - Array of objects from bank statement Excel
* @returns {Object} Processed bank statement data
*/
function processBankStatement(rawData) {
const bank_details = {
bank_name: null,
opening_balance: 0,
ifsc: null,
address: null,
city: null,
account_no: null,
account_holder_name: null,
branch_name: null,
branch_code: null
};
const transactions = [];
let headerRowIndex = -1;
let headerKeys = {};
let voucher_number = 1;

// Helper function to format date as YYYY-MM-DD
function formatDate(dateString) {
if (!dateString) return null;
try {
const dateParts = dateString.split(/[-/]/);
if (dateParts.length === 3) {
const day = parseInt(dateParts[0]);
const month = parseInt(dateParts[1]);
const year = parseInt(dateParts[2]);

if (isNaN(day) || isNaN(month) || isNaN(year)) {
return null;
}

const formattedYear = (year < 100) ? (year < 50 ? `20${year}` : `19${year}`) : year;

return `${formattedYear}-${String(month).padStart(2, '0')}-${String(day).padStart(2, '0')}`;
}
return null;
} catch (error) {
return null;
}
}

// Helper function to safely convert to number
function safeNumber(value) {
if (value === null || value === undefined) {
return null;
}
const num = Number(value);
return isNaN(num) ? null : num;
}

// 1. Extract bank details
for (let i = 0; i < Math.min(15, rawData.length); i++) {
const row = rawData[i];
for (const key in row) {
if (row[key]) {
const value = row[key].toString().trim();

if (!bank_details.bank_name && value.toUpperCase().includes("BANK")) {
bank_details.bank_name = value.split(" ")[0];
}

if (!bank_details.account_holder_name && (value.toUpperCase().includes("MR") || value.toUpperCase().includes("MS"))) {
bank_details.account_holder_name = value;
}

if (!bank_details.address && value.toUpperCase().includes("ADDRESS")) {
bank_details.address = value.replace(/Address\s*:\s*/i, '');
}

if (!bank_details.city && value.toUpperCase().includes("CITY")) {
bank_details.city = value.replace(/City\s*:\s*/i, '');
}

if (!bank_details.branch_name && value.toUpperCase().includes("Account Branch")) {
bank_details.branch_name = value.replace(/Account Branch\s*:\s*/i, '');
}

if (!bank_details.account_no && value.toUpperCase().includes("ACCOUNT NO")) {
bank_details.account_no = value.replace(/Account No\s*: */i, '').split(" ")[0];
}

const ifscKeywords = ['IFSC', 'ifsc', 'Ifsc', 'RTGS/NEFT IFSC','NEFT/RTGS IFSC', 'Neft/Rtgs IFSC', 'rtgs/neft ifsc'];
if (ifscKeywords.some(keyword => value.includes(keyword))) {
const ifscValue = value.replace(new RegExp(ifscKeywords.join('|'), 'gi'), '').replace(/:/g, '').trim().split(" ")[0];
bank_details.ifsc = ifscValue;
if (!bank_details.address && value.toUpperCase().includes("ADDRESS")) {
bank_details.address = value.replace(/Address\s*:\s*/i, '');
}
}
}
}
}

// 2. Identify header row and keys
for (let i = 0; i < rawData.length; i++) {
const row = rawData[i];
let hasDate = false;
let hasNarration = false;
let hasWithdrawal = false;
let hasDeposit = false;
let hasBalance = false;

for (const key in row) {
if (row[key]) {
const value = row[key].toString().trim().toUpperCase();
if (value === "DATE") hasDate = true;
else if (value === "NARRATION" || value === "NARRATION OR DETAILS" || value === "DETAILS") hasNarration = true;
else if (value === "WITHDRAWAL AMT." || value === "WITHDRAWAL AMT. OR DEBIT" || value === "WITHDRAWAL" || value === "DEBIT") hasWithdrawal = true;
else if (value === "DEPOSIT AMT." || value === "DEPOSIT AMT. OR CREDIT" || value === "DEPOSIT" || value === "CREDIT") hasDeposit = true;
else if (value === "CLOSING BALANCE" || value === "CLOSING BALANCE OR BALANCE" || value === "BALANCE") hasBalance = true;
}
}

if (hasDate && hasNarration && (hasWithdrawal || hasDeposit) && hasBalance) {
headerRowIndex = i;
headerKeys = row;
break;
}
}

if (headerRowIndex === -1) {
console.warn("Could not find header row.");
return { bank_details, transactions };
}

const dateKey = Object.keys(headerKeys).find(key => headerKeys[key] && headerKeys[key].toString().trim().toUpperCase() === "DATE");
const narrationKey = Object.keys(headerKeys).find(key => headerKeys[key] && (headerKeys[key].toString().trim().toUpperCase() === "NARRATION" || headerKeys[key].toString().trim().toUpperCase() === "NARRATION OR DETAILS" || headerKeys[key].toString().trim().toUpperCase() === "DETAILS"));
const withdrawalKey = Object.keys(headerKeys).find(key => headerKeys[key] && (headerKeys[key].toString().trim().toUpperCase() === "WITHDRAWAL AMT." || headerKeys[key].toString().trim().toUpperCase() === "WITHDRAWAL AMT. OR DEBIT" || headerKeys[key].toString().trim().toUpperCase() === "WITHDRAWAL" || headerKeys[key].toString().trim().toUpperCase() === "DEBIT"));
const depositKey = Object.keys(headerKeys).find(key => headerKeys[key] && (headerKeys[key].toString().trim().toUpperCase() === "DEPOSIT AMT." || headerKeys[key].toString().trim().toUpperCase() === "DEPOSIT AMT. OR CREDIT" || headerKeys[key].toString().trim().toUpperCase() === "DEPOSIT" || headerKeys[key].toString().trim().toUpperCase() === "CREDIT"));
const balanceKey = Object.keys(headerKeys).find(key => headerKeys[key] && (headerKeys[key].toString().trim().toUpperCase() === "CLOSING BALANCE" || headerKeys[key].toString().trim().toUpperCase() === "CLOSING BALANCE OR BALANCE" || headerKeys[key].toString().trim().toUpperCase() === "BALANCE"));

// 3. Process transaction rows
for (let i = headerRowIndex + 1; i < rawData.length; i++) {
const row = rawData[i];
if (!row) continue;

const dateValue = row[dateKey];
const narration = row[narrationKey] ? row[narrationKey].toString().trim() : null;
const withdrawalAmount = safeNumber(row[withdrawalKey]);
const depositAmount = safeNumber(row[depositKey]);
const balance = safeNumber(row[balanceKey]);

if (!dateValue && !narration && !withdrawalAmount && !depositAmount && !balance) continue; //Skip empty row

const date = formatDate(dateValue);

let type = null;
let amount = null;

if (withdrawalAmount !== null) {
type = "withdrawal";
amount = withdrawalAmount;
} else if (depositAmount !== null) {
type = "deposit";
amount = depositAmount;
}

if (amount === null) {
continue; // Skip if amount is null
}

const transaction = {
date,
voucher_number: voucher_number++,
amount: amount !== null ? Number(amount) : null,
desc: narration,
from: null,
to: null,
type,
balance
};

transactions.push(transaction);
}

// Try to extract opening balance from statement
let openingBalanceFound = false;
for (let i = 0; i < rawData.length; i++) {
const row = rawData[i];
for (const key in row) {
if(row[key]){
const value = row[key].toString().trim().toUpperCase();

if (value.includes('OPENING BALANCE')){

let value_open=rawData[i][Object.keys(rawData[i])[0]]

if (typeof value_open === 'number'){
bank_details.opening_balance = value_open;
openingBalanceFound = true;
break;
}

}
}
}
if (openingBalanceFound) break;
}

let addressString = '';
for (let i = 0; i < Math.min(10, rawData.length); i++) {
const row = rawData[i];
for (const key in row) {
if (row[key] && typeof row[key] === 'string') {
const value = row[key].trim();
if (!bank_details.address && value.toUpperCase().includes("ADDRESS")) {
addressString += value.replace(/Address\s*:\s*/i, '');
}

if (!bank_details.city && value.toUpperCase().includes("CITY")) {
addressString += value.replace(/City\s*:\s*/i, '');
}
}
}
}
if (!bank_details.address && addressString != ''){
bank_details.address = addressString
}

return { bank_details, transactions };
}

module.exports = processBankStatement;