logging for null line & "S" line

lib/parse.js

@@ -34,7 +34,10 @@ modesByClass[64] = modes[6]
 
 const line = (p) => {
 	const r = parse.line(p)
-	if (!r) return null
+	if (!r) {
+		debug('null line', p, r)
+		return null
+	}
 	if (r.productCode) {
 		r.productCode = parseInt(r.productCode)
 		r.product = (util.products.categories[r.productCode] || {}).type || null
@@ -90,7 +93,18 @@ const journey = (l, p, r) => {
 				}
 			}
 		}
-		return parseJourney(j)
+
+		// derhuerst/vbb-gtfs#2
+		const parsed = parseJourney(j)
+		if (parsed && Array.isArray(parsed.parts)) {
+			for (let part of parsed.parts) {
+				if (part && part.line && part.line.name === 'S') {
+					debug('S line', part)
+				}
+			}
+		}
+
+		return parsed
 	}
 	return tapped
 }