76 lines
2.4 KiB
JavaScript
76 lines
2.4 KiB
JavaScript
const testEmails = [
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`Dear Customer, Rs.20.00 has been debited from account 5488 to VPA paytm.s1eeznf@pty SHS CANTEEN 1 on 18-08-25. Your UPI transaction reference number is 109983023268. If you did not authorize this `
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];
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function parseBankMessage(email) {
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const result = {
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amount: null,
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vendor: null,
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rawVendor: null,
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type: null,
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date: null,
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referenceNumber: null,
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};
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// Amount
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const amtMatch = email.match(/(?:Rs\.?|INR)\s*([\d,]+\.?\d*)/i);
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if (amtMatch) result.amount = parseFloat(amtMatch[1].replace(/,/g, ""));
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// Debit / Credit
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if (/debited/i.test(email)) result.type = "debit";
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else if (/credited/i.test(email)) result.type = "credit";
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// Date
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const dateMatch = email.match(/on\s+(\d{2}[-/]\d{2}[-/]\d{2,4})/i);
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if (dateMatch) result.date = dateMatch[1];
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// Reference Number (flexible regex)
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const refMatch = email.match(/(?:reference number is|UPI reference number is|Ref No:?)\s*([A-Za-z0-9]+)/i);
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if (refMatch) result.referenceNumber = refMatch[1].trim();
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// Vendor extraction - remove emails, pick last uppercase phrase
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let vendorCandidate = email.replace(/[a-z0-9._%+-]+@[a-z0-9.-]+/gi, '').trim();
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const vendorWords = vendorCandidate.match(/(?:\b[A-Z]{2,}\b(?:\s)?)+/g);
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if (vendorWords && vendorWords.length > 0) {
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result.rawVendor = vendorWords[vendorWords.length - 1].trim(); // store raw
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} else {
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// Improved vendor fallback
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const toMatch = email.match(/to\s+(?:VPA\s+)?(?:[^\s@]+\@[^\s]+\s+)?([A-Za-z0-9\s&.-]+)/i);
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if (toMatch) {
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let v = toMatch[1].trim();
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v = v.replace(/[a-z0-9._%+-]+@[a-z0-9.-]+/gi, '').trim(); // remove emails
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v = v.replace(/\s{2,}/g, ' ');
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result.rawVendor = v;
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}
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}
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// ---------- Cleaning Pipeline ----------
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if (result.rawVendor) {
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let v = result.rawVendor;
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// Remove noise keywords
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v = v.replace(/\b(?:UPI|VPA|REF|Txn|Order|Payment|NEFT|IMPS)\b/gi, '');
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// Replace underscores/dashes with space
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v = v.replace(/[_\-]+/g, ' ');
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// Collapse multiple spaces
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v = v.replace(/\s{2,}/g, ' ').trim();
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// Normalize casing (title case)
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v = v.toLowerCase().replace(/\b\w/g, c => c.toUpperCase());
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result.vendor = v;
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}
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return result;
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}
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console.log("=== Bank Email Regex Test ===");
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testEmails.forEach((email, idx) => {
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console.log(`\n-- Email ${idx + 1} --`);
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console.log(email);
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const parsed = parseBankMessage(email);
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console.log("Parsed Result:", parsed);
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});
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