bankcode-bic/dist/download/de.js

Convert bank codes from IBAN to BICs, Name of bank. Currently supports only some selected EU countries.

import { scrapeDownloadUrl } from "../libs/scrape-dowload-url.js";

//#region src/download/de.ts
const getCacheKey = (country) => {
	return `bankcode-bic-${country}`;
};
const getDownloadUrl = async (fetchFn = globalThis.fetch) => {
	return {
		...await scrapeDownloadUrl("https://www.bundesbank.de/de/aufgaben/unbarer-zahlungsverkehr/serviceangebot/bankleitzahlen/download-bankleitzahlen-602592", /href="(?<url>.*\/resource\/blob\/(?<version>\d+)\/.*\/blz-aktuell-csv-data.csv)"/, fetchFn),
		dataFormat: "csv",
		notes: "Deutsche Bundesbank Bankleitzahlendatei"
	};
};
const downloadCSV = async (url, fetchFn = globalThis.fetch) => {
	const res = await fetchFn(url);
	if (!res.ok) throw new Error(`Failed to fetch CSV from ${url}: ${res.statusText}`);
	const buffer = await res.arrayBuffer();
	const decoder = new TextDecoder("iso-8859-1");
	const cvs = decoder.decode(new Uint8Array(buffer));
	return cvs;
};
const parseCSV = (cvs) => {
	const lines = cvs.split(/\r?\n/);
	const header = lines[0].split(";");
	const colMap = /* @__PURE__ */ new Map();
	header.forEach((col, idx) => {
		colMap.set(col.trim(), idx);
	});
	lines.shift();
	const wantedCols = [
		"Bankleitzahl",
		"BIC",
		"Bezeichnung",
		"UNKNOWN",
		"PLZ",
		"Ort",
		"UNKNOWN",
		"UNKNOWN",
		"UNKNOWN",
		"UNKNOWN"
	];
	const BICs = /* @__PURE__ */ new Set();
	const result = [];
	for (const line_ of lines) {
		const line = line_.trim();
		if (line === "") continue;
		const cols = line.split(";");
		for (let i = 0; i < cols.length; i++) {
			const val = cols[i];
			if (val.startsWith("\"") && val.endsWith("\"")) cols[i] = val.slice(1, -1).replace(/""/g, "\"");
		}
		if (cols[colMap.get("Änderungskennzeichen") ?? -1] === "D") continue;
		if (cols[colMap.get("Merkmal") ?? -1] !== "1") continue;
		if (cols[colMap.get("BIC") ?? -1] === "") continue;
		if (BICs.has(cols[colMap.get("BIC") ?? -1])) continue;
		BICs.add(cols[colMap.get("BIC") ?? -1]);
		const row = wantedCols.map((col) => cols[colMap.get(col) ?? -1]?.trim());
		result.push(row);
	}
	return result;
};

//#endregion
export { downloadCSV, getCacheKey, getDownloadUrl, parseCSV };