/// <summary>
/// 在指定的地块尝试进行投入
/// </summary>
/// <param name="place">要进行投入的地块</param>
/// <returns>是否成功扣除所需物品</returns>
public bool TryInvest( Place place )
{
lock ( place.SyncRoot )
{
return place.GetPlayer().Resources.RemoveItems( Items );
}
}
/// <summary>
/// 从 JSON 数据中读取
/// </summary>
/// <param name="place">活动所处地块</param>
/// <param name="data">活动数据</param>
/// <returns>活动对象</returns>
public static PlaceActing FromData( Place place, JObject data )
{
if ( place == null )
throw new ArgumentNullException( "place" );
if ( data == null )
return null;
var startOn = data.Value<DateTime>( "StartOn" );
var playerId = data.GuidValue( "PlayerID" );
var action = GameHost.GameRules.GetDataItem<ActionDescriptorBase>( data.GuidValue( "ActionDescriptor" ) );
if ( action == null )
return null;
return new PlaceActing
{
PlayerID = playerId,
Place = place,
StartOn = startOn,
ActionDescriptor = action,
};
}
/// <summary>
/// 保存游戏地块对象
/// </summary>
/// <param name="place"></param>
private void Save( Place place )
{
var filepath = Path.Combine( placesDirectory, place.Coordinate + ".json" );
File.WriteAllText( filepath, place.SaveAsJson() );
}
/// <summary>
/// 尝试在指定地块开始这个活动
/// </summary>
/// <param name="place">要开始活动的地方</param>
/// <returns>正在进行的活动</returns>
protected virtual PlaceActing TryStartAt( GamePlayer player, Place place )
{
lock ( place )
{
if ( place.Acting != null )
throw new InvalidOperationException( "土地上已经存在一个正在进行的活动" );
if ( Requirement.TryInvest( place ) == false )
return null;
}
return PlaceActing.StartAt( player, place, this );
}
/// <summary>
/// 在指定地块开始这个活动
/// </summary>
/// <param name="place">要开始活动的地块</param>
internal static PlaceActing StartAt( GamePlayer player, Place place, ActionDescriptorBase action )
{
if ( place == null )
throw new ArgumentNullException( "place" );
var acting = new PlaceActing
{
StartOn = DateTime.UtcNow,
ActionDescriptor = action,
PlayerID = player.Guid,
Place = place,
};
place.SetActing( acting );
return acting;
}
/// <summary>
/// 检查指定地块当前是否满足限制。
/// </summary>
/// <param name="player">当前操作的玩家</param>
/// <param name="place">要检查的地块</param>
/// <returns>若不满足限制，返回原因，若满足限制，则返回null</returns>
protected virtual string Check( GamePlayer player, Place place )
{
if ( player == null )
throw new ArgumentNullException( "player" );
if ( place == null )
throw new ArgumentNullException( "place" );
if ( InTerritory && place.Owner == player.Guid )
return "只能在自己的领土上上开展该活动";
if ( TerrainType != null )
{
if ( place.Terrain == null || TerrainType.IsAssignableFrom( place.Terrain.GetType() ) == false )
return "地形不满足活动需求";
}
if ( TerrainDescriptors.Any() )
{
if ( place.Terrain == null || TerrainDescriptors.Contains( place.Terrain.Descriptor.Guid ) == false )
return "地形不满足活动需求";
}
if ( BuildingType != null )
{
if ( place.Terrain == null || BuildingType.IsAssignableFrom( place.Building.GetType() ) == false )
return "地形不满足活动需求";
}
if ( BuildingDescriptors.Any() )
{
if ( place.Terrain == null || BuildingDescriptors.Contains( place.Building.Descriptor.Guid ) == false )
return "地形不满足活动需求";
}
if ( UnitType != null )
{
if ( place.GetUnits().All( unit => UnitType.IsAssignableFrom( unit.GetType() ) == false ) )
return "单位不满足活动需求";
}
if ( UnitDescriptors.Any() )
{
if ( place.GetUnits().All( unit => UnitDescriptors.Contains( unit.Descriptor.Guid ) == false ) )
return "单位不满足活动需求";
}
return null;
}
/// <summary>
/// 获取移动到指定位置所需要的移动力
/// </summary>
/// <param name="place">抵达位置</param>
/// <returns>所需移动力</returns>
public virtual decimal MobilityRequired( Place place )
{
return 1;
}