Add EventCache for efficient retrieval of event groups and teams

Signed-off-by: Chaoscaot <max@maxsp.de>

WebsiteBackend/src/de/steamwar/routes/Events.kt

@@ -20,6 +20,7 @@
 package de.steamwar.routes
 
 import de.steamwar.ResponseError
+import de.steamwar.data.EventCache
 import de.steamwar.plugins.SWPermissionCheck
 import de.steamwar.sql.*
 import de.steamwar.sql.EventGroup.EventGroupType
@@ -113,10 +114,10 @@ data class ExtendedResponseEvent(
     val referees: List<ResponseUser>,
     val relations: List<ResponseRelation>
 ) {
-    constructor(event: Event) : this(
+    constructor(event: Event, cache: EventCache = EventCache()) : this(
         ResponseEvent(event),
-        TeamTeilnahme.getTeams(event.eventID).map { ResponseTeam(it) },
-        EventGroup.get(event).map { ResponseGroups(it) },
+        TeamTeilnahme.getTeams(event.eventID).map { cache.convertTeam(it) },
+        EventGroup.get(event).map { cache.convertGroup(it) },
         EventFight.getEvent(event.eventID).map { ResponseEventFight(it) },
         Referee.get(event.eventID).map { ResponseUser.get(SteamwarUser.byId(it)!!) },
         EventRelation.get(event).map { ResponseRelation(it) }