tidy up utils

src/rekam-medis/index.ts

@@ -54,11 +54,15 @@ export class RekamMedis extends BaseApi<'rekamMedis'> {
  * dan KODE PPK. Ini berdasarkan spesifikasi yang telah ditentukan
  * pada halaman TrustMark BPJS Kesehatan.
  */
-async function preprocess(data: unknown, config: Config): Promise<string> {
+async function preprocess<T>(data: Bundle<T>, config: Config): Promise<string> {
 	try {
 		const value = JSON.stringify(data);
 		const compressed = await gzip(value);
-		return encrypt(compressed.toString('base64'), config);
+		return encrypt(compressed.toString('base64'), [
+			config.consId,
+			config.consSecret,
+			config.ppkCode
+		]);
 	} catch (err) {
 		// TODO: define custom error
 		throw new Error(`failed to compress or encrypt data. ${err}`);

src/rekam-medis/utils.ts

@@ -1,6 +1,5 @@
-import zlib from 'node:zlib';
-import { Config } from '../fetcher.js';
 import { createCipheriv, createHash } from 'node:crypto';
+import zlib from 'node:zlib';
 
 export async function gzip(value: string): Promise<Buffer> {
 	return new Promise((resolve, reject) => {
@@ -11,13 +10,12 @@ export async function gzip(value: string): Promise<Buffer> {
 	});
 }
 
-export function encrypt(value: string, config: Config): string {
-	const { consId, consSecret, ppkCode } = config;
-	if (!consId || !consSecret || !ppkCode) {
+export function encrypt(value: string, keyCombinations: string[]): string {
+	if (keyCombinations.some((k) => !k)) {
 		throw new Error(`consId, consSecret, or ppkCode are not set`);
 	}
 
-	const keyPlain = consId + consSecret + ppkCode;
+	const keyPlain = keyCombinations.join('');
 	const key = createHash('sha256').update(keyPlain, 'utf8').digest();
 	const iv = Uint8Array.from(key.subarray(0, 16));
 	const cipher = createCipheriv('aes-256-cbc', key, iv);

test/rekam-medis/utils.test.ts

@@ -1,6 +1,5 @@
 import { describe, expect, it } from 'vitest';
 import { unzipSync } from 'zlib';
-import { Config } from '../../src/fetcher';
 import { encrypt, gzip } from '../../src/rekam-medis/utils';
 
 describe('utils', () => {
@@ -14,14 +13,9 @@ describe('utils', () => {
 	});
 
 	it.concurrent('decrypt()', async () => {
-		const config = {
-			consId: '12345',
-			consSecret: '53cREt',
-			ppkCode: '54321'
-		};
-
-		const result1 = encrypt('data1', <Config>config);
-		const result2 = encrypt('data2', <Config>config);
+		const keys = ['a', 'b', 'c'];
+		const result1 = encrypt('data1', keys);
+		const result2 = encrypt('data2', keys);
 
 		expect(result1.length % 4).toBe(0);
 		expect(result2.length % 4).toBe(0);