refactor(ts/models/shuttle) implement shuttle prefix using `shuttle…

…VariantFromRunId`

assets/src/models/shuttle.ts

@@ -33,32 +33,32 @@ export const shuttleVariantFromRunId = (
   }
 }
 
-export const formattedRunNumber = ({ runId }: Vehicle): string => {
-  if (runId === null) {
-    return "Not Available"
-  }
-
-  const [area, run] = runId.split("-")
-
-  // Remove leading zero from the run portion
-  return `${prefix(run)}${area} ${run.slice(1)}`
-}
-
-const prefix = (run: string): string => {
-  switch (run) {
-    case "0501":
+const prefix = (variant: ShuttleVariant | null): string => {
+  switch (variant) {
+    case ShuttleVariant.Blue:
       return "Blue "
-    case "0502":
+    case ShuttleVariant.Green:
       return "Green "
-    case "0503":
+    case ShuttleVariant.Orange:
       return "Orange "
-    case "0504":
+    case ShuttleVariant.Red:
       return "Red "
-    case "0505":
+    case ShuttleVariant.CommuterRail:
       return "Commuter Rail "
-    case "0555":
+    case ShuttleVariant.Special:
       return "Special "
     default:
       return ""
   }
 }
+
+export const formattedRunNumber = ({ runId }: Vehicle): string => {
+  if (runId === null) {
+    return "Not Available"
+  }
+
+  const [area, run] = runId.split("-")
+
+  // Remove leading zero from the run portion
+  return `${prefix(shuttleVariantFromRunId(runId))}${area} ${run.slice(1)}`
+}