feat: add tva proxy

index.ts

@@ -12,6 +12,7 @@ import {
   rneActeDownloadController,
   rneBilanDownloadController,
 } from './src/controllers/rne-download';
+import { tvaController } from './src/controllers/tva';
 
 dotenv.config();
 
@@ -86,6 +87,11 @@ app.use('/status', statusRouter);
  */
 app.use('/association/:rna', associationController);
 
+/**
+ * Association
+ */
+app.use('/tva/:tvaNumber', tvaController);
+
 /**
  * Error handling
  */

src/clients/tva/index.ts

@@ -0,0 +1,10 @@
+import routes from '../urls';
+import { httpGet } from '../../utils/network';
+import constants from '../../constants';
+
+export const clientTVA = async (rna: string): Promise<string> => {
+  const url = `${routes.tva}${rna}`;
+  const response = await httpGet(url, { timeout: constants.timeout.L });
+  const { data } = response;
+  return data;
+};

src/clients/urls.ts

@@ -1,5 +1,6 @@
 const routes = {
   association: 'https://siva-integ1.cegedim.cloud/apim/api-asso/api/structure/',
+  tva: 'https://ec.europa.eu/taxation_customs/vies/rest-api/ms/FR/vat/',
   inpi: {
     portail: {
       entreprise: 'https://data.inpi.fr/entreprises/',

src/controllers/tva.ts

@@ -0,0 +1,17 @@
+import { Request, Response, NextFunction } from 'express';
+import { verifyTVANumber } from '../models/siren-and-siret';
+import { clientTVA } from '../clients/tva';
+
+export const tvaController = async (
+  req: Request,
+  res: Response,
+  next: NextFunction
+) => {
+  try {
+    const tvaNumber = verifyTVANumber(req.params?.tvaNumber);
+    const tva = await clientTVA(tvaNumber);
+    res.status(200).json(tva);
+  } catch (e) {
+    next(e);
+  }
+};

src/models/siren-and-siret/index.ts

@@ -3,15 +3,32 @@ import {
   NotASiretError,
   NotLuhnValidSirenError,
   NotLuhnValidSiretError,
-} from "./siren-and-siret-exceptions";
+} from './siren-and-siret-exceptions';
 
 /**
  * Siren and siret types
  */
 type Brand<K, T> = K & { __brand: T };
 
-export type Siren = Brand<string, "Siren">;
-export type Siret = Brand<string, "Siren">;
+export type TVANumber = Brand<string, 'TVANumber'>;
+
+export const isTVANumber = (slug: string): slug is TVANumber => {
+  return !!slug.match(/^\d{11}$/g);
+};
+
+/**
+ * throw an exception if a string is not a TVA Number
+ * */
+export const verifyTVANumber = (slug: string): TVANumber => {
+  if (!isTVANumber(slug)) {
+    throw new Error('Not a valid TVANumber');
+  } else {
+    return slug;
+  }
+};
+
+export type Siren = Brand<string, 'Siren'>;
+export type Siret = Brand<string, 'Siren'>;
 
 export const isSiren = (slug: string): slug is Siren => {
   if (!hasSirenFormat(slug) || !isLuhnValid(slug)) {
@@ -79,7 +96,7 @@ const luhnChecksum = (str: string) => {
 
 export const isLuhnValid = (str: string) => {
   // La poste siren and siret are the only exceptions to Luhn's formula
-  if (str.indexOf("356000000") === 0) {
+  if (str.indexOf('356000000') === 0) {
     return true;
   }
   return luhnChecksum(str) % 10 == 0;
@@ -93,8 +110,8 @@ export const hasSirenFormat = (str: string) => !!str.match(/^\d{9}$/g);
 
 export const hasSiretFormat = (str: string) => !!str.match(/^\d{14}$/g);
 
-export const formatSiret = (siret = "") => {
-  return siret.replace(/(\d{3})/g, "$1 ").replace(/(\s)(?=(\d{2})$)/g, "");
+export const formatSiret = (siret = '') => {
+  return siret.replace(/(\d{3})/g, '$1 ').replace(/(\s)(?=(\d{2})$)/g, '');
 };
 
 export const extractSirenFromSiret = (siret: string) => {