feat: Add platforms to stations

module-model/src/main/kotlin/de/twomartens/timetable/model/common/Platform.kt

@@ -2,5 +2,16 @@ package de.twomartens.timetable.model.common
 
 data class Platform(
         var name: String,
-        var sections: MutableList<Section>
-)
+) {
+    private var sectionsInternal: MutableSet<Section> = mutableSetOf()
+
+    val sections: Set<Section> get() = sectionsInternal
+
+    fun addSection(section: Section) {
+        sectionsInternal.add(section)
+    }
+
+    fun addAllSections(sections: Collection<Section>) {
+        sectionsInternal.addAll(sections)
+    }
+}

module-model/src/main/kotlin/de/twomartens/timetable/model/db/Station.kt

@@ -18,7 +18,6 @@ data class Station(
         var stationId: StationId,
         var countryCode: CountryCode,
         var name: NonEmptyString,
-        var platforms: List<Platform>
 ) {
     @Id
     lateinit var id: ObjectId
@@ -28,4 +27,24 @@ data class Station(
 
     @LastModifiedDate
     lateinit var lastModified: Instant
+
+    private var platformsInternal: MutableMap<String, Platform> = mutableMapOf()
+
+    val platforms: List<Platform> get() = platformsInternal.values.toList()
+
+    fun addPlatform(platform: Platform?) {
+        if (platform == null) {
+            return
+        }
+
+        if (!platformsInternal.containsKey(platform.name)) {
+            platformsInternal[platform.name] = platform
+        } else {
+            platformsInternal[platform.name]?.addAllSections(platform.sections)
+        }
+    }
+
+    fun addAllPlatforms(platforms: Collection<Platform>) {
+        platforms.forEach { addPlatform(it) }
+    }
 }

module-model/src/main/kotlin/de/twomartens/timetable/model/mapper/StationMapper.kt

@@ -16,12 +16,13 @@ interface StationMapper {
     @Mapping(target = "created", ignore = true)
     @Mapping(target = "lastModified", ignore = true)
     fun mapToDB(countryCode: CountryCode, dto: Station): de.twomartens.timetable.model.db.Station {
-        return de.twomartens.timetable.model.db.Station(
+        val station = de.twomartens.timetable.model.db.Station(
                 StationId.of(NonEmptyString(countryCode.countryCode.value + "-" + dto.id)),
                 countryCode,
-                NonEmptyString(dto.name),
-                dto.platforms
+                NonEmptyString(dto.name)
         )
+        station.addAllPlatforms(dto.platforms)
+        return station
     }
 
     fun mapStationsToDto(stations: List<de.twomartens.timetable.model.db.Station>): List<Station>