feat: implement route type and icons

shared/src/commonMain/kotlin/moe/lava/banksia/api/ptv/PtvService.kt

@@ -18,12 +18,34 @@ import moe.lava.banksia.Constants
 import moe.lava.banksia.log
 import okio.ByteString.Companion.encodeUtf8
 
+// Ordinals used for sorting in searcher
+enum class GtfsSubType(val value: Int) {
+    MetroTrain(2),
+    MetroTram(3),
+    MetroBus(4),
+    RegionalTrain(1),
+    RegionalCoach(5),
+    RegionalBus(6),
+    SkyBus(11),
+    Interstate(10),
+}
+
 @Serializable
 data class Route(
+    @SerialName("route_type") val routeType: RouteType,
     @SerialName("route_id") val routeId: Int,
     @SerialName("route_number") val routeNumber: String,
     @SerialName("route_name") val routeName: String,
-)
+    @SerialName("route_gtfs_id") val routeGtfsId: String,
+) {
+    fun gtfsSubType(): GtfsSubType? {
+        GtfsSubType.entries.forEach {
+            if (routeGtfsId.startsWith(it.value.toString()))
+                return it
+        }
+        return null
+    }
+}
 
 @Serializable
 data class RouteResponse(val routes: List<Route>)

shared/src/commonMain/kotlin/moe/lava/banksia/api/ptv/RouteType.kt

@@ -0,0 +1,34 @@
+package moe.lava.banksia.api.ptv
+
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.descriptors.PrimitiveKind
+import kotlinx.serialization.descriptors.PrimitiveSerialDescriptor
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+
+private object RouteTypeSerializer : KSerializer<RouteType> {
+    override val descriptor: SerialDescriptor = PrimitiveSerialDescriptor(RouteType::class.qualifiedName!!,
+        PrimitiveKind.INT)
+
+    override fun serialize(encoder: Encoder, value: RouteType) {
+        encoder.encodeInt(value.ordinal)
+    }
+
+    override fun deserialize(decoder: Decoder): RouteType {
+        val index = decoder.decodeInt()
+        return RouteType.entries[index]
+    }
+
+    override fun toString(): String = "EnumOrdinalSerializer<${descriptor.serialName}>"
+}
+
+@Serializable(with = RouteTypeSerializer::class)
+enum class RouteType {
+    TRAIN,
+    TRAM,
+    BUS,
+    VLINE,
+    NIGHT_BUS,
+}