DB journeys(): pass along opt.age if defined ✅

p/db/index.js

@@ -178,13 +178,16 @@ const transformJourneysQuery = ({opt}, query) => {
 	const filters = query.jnyFltrL
 	if (opt.bike) filters.push(bike)
 
-	if (('age' in opt) && ('ageGroup' in opt))
+	if (('age' in opt) && ('ageGroup' in opt)) {
-		throw new TypeError('opt.age and opt.ageGroup are mutually exclusive.')
+		throw new TypeError(`\
+opt.age and opt.ageGroup are mutually exclusive.
+Pass in just opt.age, and the age group will calculated automatically.`)
+	}
 
 	const tvlrAgeGroup = ('age' in opt) ? ageGroupFromAge(opt.age) : opt.ageGroup
 
 	query.trfReq = {
-		// todo:
+		// todo: what are these?
 		// "directESuiteCall": true,
 		// "rType": "DB-PE",
 
@@ -192,6 +195,7 @@ const transformJourneysQuery = ({opt}, query) => {
 		// todo [breaking]: support multiple travelers
 		tvlrProf: [{
 			type: tvlrAgeGroup || ageGroup.ADULT,
+			...(('age' in opt) ? {age: opt.age} : {}),
 			redtnCard: opt.loyaltyCard
 				? formatLoyaltyCard(opt.loyaltyCard)
 				: null

test/format/db-journeys-query.js

@@ -27,6 +27,7 @@ const opt = {
 	products: {},
 
 	firstClass: false,
+	age: 24,
 	loyaltyCard: {
 		type: loyaltyCards.BAHNCARD,
 		discount: 25,
@@ -73,7 +74,8 @@ tap.test('formats a journeys() request correctly (DB)', (t) => {
 		trfReq: {
 			jnyCl: 2,
 			tvlrProf: [{
-				type: 'E', // "adult"
+				type: 'Y', // "young"
+				age: 24,
 				redtnCard: 2, // BahnCard 25
 			}],
 			cType: 'PK',