fix csv import for money tracker

src/lib/server/money-tracker.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest';
-import { cents, csvDate, parseCsv } from './money-tracker';
+import { cents, csvDate, importCents, parseCsv, parseTransactionImport } from './money-tracker';
 
 describe('transaction import parsing', () => {
 	it('handles quoted commas and semicolon-separated European amounts', () => {
@@ -15,6 +15,51 @@ describe('transaction import parsing', () => {
 
 	it('rejects invalid dates and amounts rather than altering them', () => {
 		expect(csvDate('31/02/2026')).toBeNull();
+		expect(csvDate('Sat 1 Aug 2025')).toBeNull();
 		expect(cents('1.234,56')).toBeUndefined();
 	});
+
+	it('accepts the spreadsheet export with tabs, spacer rows, named dates and euro amounts', () => {
+		const rows = parseCsv(
+			'date\taccount\tdescription\tamount\n' +
+				'Fri 1 Aug 2025\tDaily\tStart balance\t€123.45\n' +
+				'Fri 1 Aug 2025\tBusiness\tStart balance\t-€12.34\n' +
+				'Fri 1 Aug 2025\tShared\tStart balance\t€1,234.56\n' +
+				'\t\t\t\n' +
+				'Sat 2 Aug 2025\tShared\tExample bill\t-€1,234.50\n'
+		);
+		expect(rows).toHaveLength(5);
+		expect(rows[4]).toEqual(['Sat 2 Aug 2025', 'Shared', 'Example bill', '-€1,234.50']);
+		expect(csvDate(rows[1][0])).toBe('2025-08-01');
+		expect(csvDate(rows[4][0])).toBe('2025-08-02');
+		expect(rows.slice(1).map((row) => importCents(row[3]))).toEqual([
+			12345, -1234, 123456, -123450
+		]);
+		expect(
+			parseCsv(
+				'date,account,description,amount\n"Fri 1 Aug 2025",Shared,Start balance,"€1,234.56"'
+			)[1]
+		).toEqual(['Fri 1 Aug 2025', 'Shared', 'Start balance', '€1,234.56']);
+		expect(
+			parseCsv('date,account,description,amount\nFri 1 Aug 2025,Shared,Start balance,€1,234.56')[1]
+		).toHaveLength(5);
+		expect(
+			parseTransactionImport(
+				'date\taccount\tdescription\tamount\n' +
+					'Sat 2 Aug 2025\tShared\tExample bill\t-€1,234.50\n' +
+					'\t\t\t\n' +
+					'Fri 1 Aug 2025\tDaily\tStart balance\t€123.45\n' +
+					'Fri 1 Aug 2025\tBusiness\tStart balance\t-€12.34\n'
+			).map((row) => [row.date, row.account, row.amountCents])
+		).toEqual([
+			['2025-08-01', 'Daily', 12345],
+			['2025-08-01', 'Business', -1234],
+			['2025-08-02', 'Shared', -123450]
+		]);
+		expect(() =>
+			parseTransactionImport(
+				'date,account,description,amount\nFri 1 Aug 2025,Shared,Start balance,€1,234.56'
+			)
+		).toThrow('Quote values containing commas');
+	});
 });

src/lib/server/money-tracker.ts

@@ -23,6 +23,17 @@ export function cents(value: unknown, optional = false): number | null | undefin
 	return Number.isSafeInteger(amount) && Math.abs(amount) <= 1_000_000_000 ? amount : undefined;
 }
 
+export function importCents(value: unknown): number | undefined {
+	const raw = String(value ?? '')
+		.replace(/[€\s\u00a0]/g, '')
+		.trim();
+	if (/^-?\d{1,3}(?:,\d{3})+(?:\.\d{1,2})?$/.test(raw))
+		return cents(raw.replaceAll(',', '')) ?? undefined;
+	if (/^-?\d{1,3}(?:\.\d{3})+(?:,\d{1,2})?$/.test(raw))
+		return cents(raw.replaceAll('.', '')) ?? undefined;
+	return cents(raw) ?? undefined;
+}
+
 export function validDate(value: unknown): string | null {
 	const raw = String(value ?? '').trim();
 	if (!/^\d{4}-\d{2}-\d{2}$/.test(raw)) return null;
@@ -49,7 +60,8 @@ export function invalid(message: string) {
 
 export function parseCsv(input: string): string[][] {
 	const rows: string[][] = [];
-	const delimiter = input.split(/\r?\n/, 1)[0].includes(';') ? ';' : ',';
+	const header = input.split(/\r?\n/, 1)[0];
+	const delimiter = header.includes('\t') ? '\t' : header.includes(';') ? ';' : ',';
 	let row: string[] = [];
 	let field = '';
 	let quoted = false;
@@ -81,7 +93,78 @@ export function csvDate(value: string): string | null {
 	const raw = value.trim();
 	if (validDate(raw)) return raw;
 	const match = /^(\d{1,2})[/-](\d{1,2})[/-](\d{4})$/.exec(raw);
-	return match
-		? validDate(`${match[3]}-${match[2].padStart(2, '0')}-${match[1].padStart(2, '0')}`)
-		: null;
+	if (match)
+		return validDate(`${match[3]}-${match[2].padStart(2, '0')}-${match[1].padStart(2, '0')}`);
+	const named =
+		/^(?:(Mon|Tue|Wed|Thu|Fri|Sat|Sun)\s+)?(\d{1,2})\s+([A-Za-z]{3,9})\s+(\d{4})$/i.exec(raw);
+	if (!named) return null;
+	const months = [
+		'jan',
+		'feb',
+		'mar',
+		'apr',
+		'may',
+		'jun',
+		'jul',
+		'aug',
+		'sep',
+		'oct',
+		'nov',
+		'dec'
+	];
+	const month = months.indexOf(named[3].slice(0, 3).toLowerCase()) + 1;
+	if (!month) return null;
+	const iso = validDate(
+		`${named[4]}-${String(month).padStart(2, '0')}-${named[2].padStart(2, '0')}`
+	);
+	if (!iso) return null;
+	if (named[1]) {
+		const weekdays = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];
+		if (weekdays[new Date(iso + 'T12:00:00Z').getUTCDay()] !== named[1].toLowerCase()) return null;
+	}
+	return iso;
+}
+
+export type ImportedTransaction = {
+	date: string;
+	account: string;
+	description: string;
+	amountCents: number;
+};
+
+export function parseTransactionImport(input: string): ImportedTransaction[] {
+	const rows = parseCsv(input);
+	if (rows.length < 2 || rows.length > 20_001)
+		throw new Error('The file must have a header and 1–20,000 rows.');
+	const header = rows.shift()!.map((value) =>
+		value
+			.replace(/^\uFEFF/, '')
+			.trim()
+			.toLowerCase()
+	);
+	const columns = ['date', 'account', 'description', 'amount'].map((key) => header.indexOf(key));
+	if (columns.some((index) => index < 0))
+		throw new Error('Headers must include date, account, description and amount.');
+	const parsed: ImportedTransaction[] = [];
+	for (const [index, row] of rows.entries()) {
+		if (row.length !== header.length)
+			throw new Error(
+				`Data row ${index + 1} has ${row.length} columns; expected ${header.length}. Quote values containing commas. No rows were imported.`
+			);
+		const date = csvDate(row[columns[0]] ?? '');
+		const account = (row[columns[1]] ?? '').trim();
+		const description = (row[columns[2]] ?? '').trim();
+		const amountCents = importCents(row[columns[3]]);
+		if (
+			!date ||
+			!account ||
+			account.length > 80 ||
+			!description ||
+			description.length > 500 ||
+			amountCents == null
+		)
+			throw new Error(`Invalid data in transaction ${index + 1}. No rows were imported.`);
+		parsed.push({ date, account, description, amountCents });
+	}
+	return parsed.sort((a, b) => a.date.localeCompare(b.date));
 }