private async Task <IMap> LoadMap(long mapId)
{
MapDto map = _mapService.GetById(mapId);
if (map is null)
{
return(null);
}
IEnumerable <MapNpcDto> npcs = await _npcService.GetByMapIdAsync(mapId);
IEnumerable <MapMonsterDto> monsters = await _monsterService.GetByMapIdAsync(mapId);
IEnumerable <PortalDto> portals = await _portalService.GetByMapIdAsync(mapId);
IEnumerable <ShopDto> shops = await _shopService.GetByMapNpcIdsAsync(npcs.Select(s => s.Id));
List <long> npcMonsterIds = npcs.Select(s => s.NpcMonsterId).Intersect(monsters.Select(s => s.NpcMonsterId)).ToList();
IEnumerable <NpcMonsterSkillDto> skills = await _npcMonsterSkillService.GetByNpcMonsterIdsAsync(npcMonsterIds);
return(new SimpleMap(map, monsters, npcs, portals, shops, skills));
}