/// <summary>
/// 确认是否可以在指定地块开始这个活动
/// </summary>
/// <param name="place">地块对象</param>
/// <returns>是否可以开展这个活动</returns>
public override sealed bool CanStartAt( GamePlayer player, PlaceBase place )
{
var instance = place as Place;
if ( instance == null )
return false; ;
return Constraint.IsSatisfy( player, place );
}
/// <summary> /// 获取可以进行的操作列表 /// </summary> /// <returns>可以进行的操作列表</returns> public abstract ActionDescriptor[] GetActions( GamePlayer player );
/// <summary>
/// 获取指定玩家所有单位
/// </summary>
/// <param name="player">玩家对象</param>
/// <returns></returns>
public Unit[] GetUnits( GamePlayer player )
{
lock ( _unitSync )
{
HashSet<Unit> units;
if ( _playerUnits.TryGetValue( player.Guid, out units ) )
{
var invalids = units.Where( item => item.Owner != player.Guid ).ToArray();//检查单位是否还属于这个玩家。
foreach ( var item in invalids )
units.Remove( item );
return units.ToArray();
}
else
return new Unit[0];
}
}
/// <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>
public override PlaceActing TryStartAt( GamePlayer player, PlaceBase place )
{
if ( player == null )
throw new ArgumentNullException( "player" );
if ( place == null )
throw new ArgumentNullException( "place" );
string errorMessage;
if ( Constraint.IsSatisfy( player, place, out errorMessage ) == false )
throw new InvalidOperationException( errorMessage );
var instance = place as Place;
if ( instance == null )
return null;
return TryStartAt( player, instance );
}
/// <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> /// 尝试对指定地块进行投入来进行这个活动 /// </summary> /// <param name="place">进行活动的地块</param> /// <returns>是否成功</returns> public abstract PlaceActing TryStartAt( GamePlayer player, PlaceBase place );
/// <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> /// 确认是否可以在指定地块开展活动 /// </summary> /// <param name="place">要开展活动的地块</param> /// <returns>是否可以开展活动</returns> public abstract bool CanStartAt( GamePlayer player, PlaceBase place );
/// <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, PlaceBase place )
{
var placeInstance = place as Place;
if ( placeInstance != null )
return Check( player, placeInstance );
else
return null;//默认允许通过
}
/// <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>
/// <param name="errorMessage">错误信息</param>
/// <returns>是否满足限制</returns>
public virtual bool IsSatisfy( GamePlayer player, PlaceBase place, out string errorMessage )
{
errorMessage = Check( player, place );
return errorMessage == null;
}
/// <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>是否满足限制</returns>
public virtual bool IsSatisfy( GamePlayer player, PlaceBase place )
{
return Check( player, place ) == null;
}
/// <summary> /// 尝试对指定地块进行投入来进行这个活动 /// </summary> /// <param name="place">进行活动的地块</param> /// <returns>是否成功</returns> public abstract PlaceActing TryStartAt(GamePlayer player, PlaceBase place);
/// <summary> /// 确认是否可以在指定地块开展活动 /// </summary> /// <param name="place">要开展活动的地块</param> /// <returns>是否可以开展活动</returns> public abstract bool CanStartAt(GamePlayer player, PlaceBase place);
