bankcode-bic/dist/download/be.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";
import { xlsxUnzip } from "../libs/xlsx-unzip.js";
import { xlsxSharedStrings, xlsxWorksheetData, xlsxWorksheetXML } from "../libs/xlsx-worksheet.js";

//#region src/download/be.ts
const getCacheKey = (country) => {
	return `bankcode-bic-${country}`;
};
const getDownloadUrl = async (fetchFn = globalThis.fetch) => {
	return {
		...await scrapeDownloadUrl("https://www.nbb.be/en/activities/payments-and-securities/payment-standards/bank-identification-codes", /href="(?<url>.*\/sites\/default\/files\/(?<version>\d{4}-\d{2})\/r_fulllist_of_codes_current_\d\.xlsx)"/, fetchFn),
		dataFormat: "xlsx",
		notes: "National Bank of Belgium Bank Identification Codes"
	};
};
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 xlsContent = await xlsxUnzip(buffer);
	return xlsContent;
};
const parseCSV = (xlsContent) => {
	const sharedStrings = xlsxSharedStrings(xlsContent);
	const worksheetXML = xlsxWorksheetXML(xlsContent, 1);
	const lines = xlsxWorksheetData(worksheetXML, sharedStrings);
	while (lines[0][0] !== "T_Identification_Number") lines.shift();
	const header = lines[0];
	const colMap = /* @__PURE__ */ new Map();
	header.forEach((col, idx) => {
		colMap.set(col.trim(), idx);
	});
	lines.shift();
	const BICs = /* @__PURE__ */ new Set();
	const removedBICs = new Set([
		"VRIJ",
		"VRIJ-LIBRE",
		"NAV",
		"NAP",
		"NYA",
		"-"
	]);
	const result = [];
	for (const line of lines) {
		const bic = line[colMap.get("Biccode") ?? -1]?.replaceAll(" ", "")?.toUpperCase() ?? "";
		if (bic === "") continue;
		if (removedBICs.has(bic) || BICs.has(bic)) continue;
		BICs.add(bic);
		const bankCode = line[colMap.get("T_Identification_Number") ?? -1]?.trim() ?? "";
		if (bankCode === "") continue;
		let name = line[colMap.get("T_Institutions_English") ?? -1]?.trim() ?? "";
		if (name === "") name = line[colMap.get("T_Institutions_Dutch") ?? -1]?.trim() ?? "";
		if (name === "") name = line[colMap.get("T_Institutions_French") ?? -1]?.trim() ?? "";
		const row = Array.from({ length: 10 }).fill("");
		row[0] = bankCode;
		row[1] = bic;
		row[2] = name;
		result.push(row);
	}
	return result;
};

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