/* public members */
public static void CreateGame(int userId, string title, string password)
{
ValidateGameTitle(title);
if (password != null)
{
ValidateGamePassword(password);
}
var context = new BattleGameEntities();
using (context)
{
var user = GetUser(userId, context);
var game = new Game()
{
Title = title,
Password = password,
Status = context.Statuses.First(st => st.Value == GameStatusOpen),
RedUser = user
};
context.Games.Add(game);
context.SaveChanges();
}
}
public static IEnumerable<ActiveGameModel> GetActiveGames(int userId)
{
var context = new BattleGameEntities();
using (context)
{
var user = GetUser(userId, context);
IEnumerable<ActiveGameModel> activeGameModels;
if (user.GamesCreated.Any() || user.GamesJoined.Any())
{
var gamesList = context.Games.ToList();
activeGameModels =
from game in gamesList
where (game.BlueUser == user || game.RedUser == user) &&
(game.Status.Value == GameStatusInProgress || game.Status.Value == GameStatusFull || game.Status.Value == GameStatusOpen)
select new ActiveGameModel()
{
Id = (int)game.Id,
Creator = game.RedUser.Nickname,
Status = game.Status.Value,
Title = game.Title
};
}
else
{
activeGameModels = new List<ActiveGameModel>();
}
return activeGameModels.ToList();
}
}
public static IEnumerable<MessageModel> GetAllMessages(int userId)
{
var context = new BattleGameEntities();
using (context)
{
var user = GetUser(userId, context);
var messages = user.UserMessages;
var messageModels =
(from msg in messages
select new MessageModel()
{
State = msg.MessageState.State,
Text = msg.Text,
GameId = (int)msg.Game.Id,
GameTitle = msg.Game.Title,
Type = msg.UserMessagesType.Type
}).ToList();
var readMessageState = context.MessageStates.First(st => st.State == "read");
foreach (var msg in user.UserMessages)
{
msg.MessageState = readMessageState;
}
context.SaveChanges();
return messageModels;
}
}
/* public methods */
public static void CreateUser(string username, string nickname, string authCode)
{
ValidateUsername(username);
ValidateNickname(nickname);
ValidateAuthCode(authCode);
using (BattleGameEntities context = new BattleGameEntities())
{
var usernameToLower = username.ToLower();
var nicknameToLower = nickname.ToLower();
var dbUser = context.Users.FirstOrDefault(u => u.Username == usernameToLower || u.Nickname.ToLower() == nicknameToLower);
if (dbUser != null)
{
if (dbUser.Username.ToLower() == usernameToLower)
{
throw new ServerErrorException("Username already exists", "ERR_DUP_USR");
}
else
{
throw new ServerErrorException("Nickname already exists", "ERR_DUP_NICK");
}
}
dbUser = new User()
{
Username = usernameToLower,
Nickname = nickname,
AuthCode = authCode
};
context.Users.Add(dbUser);
context.SaveChanges();
}
}
private static Unit GetUnit(int unitId, BattleGameEntities context)
{
var unit = context.Units.FirstOrDefault(u => u.Id == unitId && u.HitPoints > 0);
if (unit == null)
{
throw new ServerErrorException("No such unit", "ERR_INV_UNIT");
}
return unit;
}
protected static Game GetGame(int gameId, BattleGameEntities context)
{
var game = context.Games.FirstOrDefault(g => g.Id == gameId);
if (game == null)
{
throw new ServerErrorException("No such game", "ERR_INV_GAME");
}
return game;
}
protected static User GetUser(int userId, BattleGameEntities context)
{
var user = context.Users.FirstOrDefault(u => u.Id == userId);
if (user == null)
{
throw new ServerErrorException("Invalid user", "ERR_INV_USR");
}
return user;
}
protected static void SendMessage(string text, User toUser, Game game, UserMessagesType msgType, BattleGameEntities context)
{
toUser.UserMessages.Add(new UserMessage()
{
Game = game,
MessageState = context.MessageStates.First(ms => ms.State == MessageStateUnread),
UserMessagesType = msgType,
Text = text
});
}
protected static void ValidateGameInProgressStatus(Game game, BattleGameEntities context)
{
if (game.Status.Value == GameStatusOpen)
{
throw new ServerErrorException("Game not yet full", "INV_GAME_STATE");
}
else if (game.Status.Value == GameStatusFinished)
{
throw new ServerErrorException("Game is already finished", "INV_GAME_STATE");
}
else if (game.Status.Value == GameStatusFull)
{
throw new ServerErrorException("Game is not started yet", "INV_GAME_STATE");
}
}
public static IEnumerable<UserModel> GetAllUsers()
{
var context = new BattleGameEntities();
using (context)
{
var users =
(from user in context.Users
select new UserModel()
{
Id = (int)user.Id,
Nickname = user.Nickname,
Score = user.Scores.Any() ? user.Scores.Sum(sc => sc.Value) : 0
});
return users.ToList();
}
}
public static string LoginUser(string username, string authCode, out string nickname)
{
ValidateUsername(username);
ValidateAuthCode(authCode);
var context = new BattleGameEntities();
using (context)
{
var usernameToLower = username.ToLower();
var user = context.Users.FirstOrDefault(u => u.Username == usernameToLower && u.AuthCode == authCode);
if (user == null)
{
throw new ServerErrorException("Invalid username or password", "ERR_INV_USR");
}
var sessionKey = GenerateSessionKey((int)user.Id);
user.SessionKey = sessionKey;
nickname = user.Nickname;
context.SaveChanges();
return sessionKey;
}
}
public static void StartGame(int gameId)
{
var context = new BattleGameEntities();
using (context)
{
var game = GetGame(gameId, context);
if (game.Status.Value != GameStatusFull)
{
throw new ServerErrorException("Nobody has joined this game", "INV_GAME_STATE");
}
UnitType warriorType = context.UnitTypes.First(type => type.Value == WarriorType);
UnitType rangerType = context.UnitTypes.First(type => type.Value == RangerType);
var redUnits = GenerateUnits(RedWarriorsPositionX, RedRangerPositionX, warriorType, rangerType);
var attackMode = context.Modes.First(m => m.Value == UnitAttackMode);
foreach (var unit in redUnits)
{
unit.Mode = attackMode;
unit.User = game.RedUser;
game.Units.Add(unit);
}
var blueUnits = GenerateUnits(BlueWarriorsPositionX, BlueRangerPositionX, warriorType, rangerType);
foreach (var unit in blueUnits)
{
unit.Mode = attackMode;
unit.User = game.BlueUser;
game.Units.Add(unit);
}
game.Status = context.Statuses.First(st => st.Value == GameStatusInProgress);
game.Turn = 0;
var userInTurn = (rand.Next() % 2 == 0) ? game.RedUser : game.BlueUser;
game.UserInTurn = userInTurn.Id;
var gameStartedMessageText = string.Format("{0} just started game {1}", game.RedUser.Nickname, game.Title);
var gameStartedMessageType = context.UserMessagesTypes.First(mt => mt.Type == UserMessageTypeGameStarted);
SendMessage(gameStartedMessageText, game.BlueUser, game, gameStartedMessageType, context);
var gameMoveMessageText = string.Format("It is your turn in game {0}", game.Title);
var gameMoveMessageType = context.UserMessagesTypes.First(mt => mt.Type == UserMessageTypeGameMove);
SendMessage(gameMoveMessageText, userInTurn, game, gameMoveMessageType, context);
context.SaveChanges();
}
}
public static void LogoutUser(string sessionKey)
{
ValidateSessionKey(sessionKey);
var context = new BattleGameEntities();
using (context)
{
var user = context.Users.FirstOrDefault(u => u.SessionKey == sessionKey);
if (user == null)
{
throw new ServerErrorException("Invalid user authentication", "INV_USR_AUTH");
}
user.SessionKey = null;
context.SaveChanges();
}
}
public static int LoginUser(string sessionKey)
{
ValidateSessionKey(sessionKey);
var context = new BattleGameEntities();
using (context)
{
var user = context.Users.FirstOrDefault(u => u.SessionKey == sessionKey);
if (user == null)
{
throw new ServerErrorException("Invalid user authentication", "INV_USR_AUTH");
}
return (int)user.Id;
}
}
/* public members */
public static void PerformMove(int userId, int gameId, int unitId, long toX, long toY)
{
var context = new BattleGameEntities();
using (context)
{
Game game = GetGame(gameId, context);
ValidateGameInProgressStatus(game, context);
User user = GetUser(userId, context);
Unit unit = GetUnit(unitId, context);
ValidateUserUnitInGame(user, unit, game);
ValidateUnitMovePosition(game, unit, toX, toY);
unit.Mode = context.Modes.First(m => m.Value == UnitModeAttack);
unit.PositionX = toX;
unit.PositionY = toY;
var otherUser = (game.RedUser == user) ? game.BlueUser : game.RedUser;
game.Turn++;
game.UserInTurn = otherUser.Id;
var messageText = string.Format(GameMoveMessageText, user.Nickname, game.Title);
var gameMoveUserMessagesType = context.UserMessagesTypes.First(mt => mt.Type == GameMoveMessageType);
SendMessage(messageText, otherUser, game, gameMoveUserMessagesType, context);
context.SaveChanges();
}
}
public static IEnumerable<OpenGameModel> GetOpenGames(int userId)
{
var context = new BattleGameEntities();
using (context)
{
var user = GetUser(userId, context);
var openStatus = context.Statuses.FirstOrDefault(st => st.Value == GameStatusOpen);
IEnumerable<OpenGameModel> openGames;
if (openStatus.Games.Any())
{
openGames =
from game in openStatus.Games
where game.RedUser != user
select new OpenGameModel()
{
Id = (int)game.Id,
Title = game.Title,
Creator = game.RedUser.Nickname
};
}
else
{
openGames = new List<OpenGameModel>();
}
return openGames.ToList();
}
}
public static BattleFieldModel GetBattleField(int gameId)
{
var context = new BattleGameEntities();
using (context)
{
Game game = GetGame(gameId, context);
ValidateGameInProgressStatus(game, context);
var redUnitModels = GetUserUnits(game.RedUser, game);
var blueUnitModels = GetUserUnits(game.BlueUser, game);
var gameField = new BattleFieldModel()
{
GameId = (int)game.Id,
Title = game.Title,
Red = new UserInGameModel()
{
Nickname = game.RedUser.Nickname,
Units = redUnitModels
},
Blue = new UserInGameModel()
{
Nickname = game.BlueUser.Nickname,
Units = blueUnitModels
},
Turn = game.Turn,
PlayerInTurn = (game.UserInTurn == game.RedUser.Id) ? "red" : "blue"
};
return gameField;
}
}
public static void PerformAttack(int userId, int gameId, int unitId, long toX, long toY)
{
var context = new BattleGameEntities();
using (context)
{
var game = GetGame(gameId, context);
ValidateGameInProgressStatus(game, context);
User user = GetUser(userId, context);
Unit unit = GetUnit(unitId, context);
ValidateUserUnitInGame(user, unit, game);
ValidateUnitAttackPosition(game, unit, user, toX, toY);
Unit attackedUnit = GetAttackedUnit(user, game, toX, toY);
var attackedUnitArmor = attackedUnit.Armor;
if (attackedUnit.Mode.Value == UnitModeDefend)
{
attackedUnitArmor *= 2;
}
unit.Mode = context.Modes.First(m => m.Value == UnitModeAttack);
var dmgTaken = unit.Attack - attackedUnitArmor;
if (dmgTaken > 0)
{
attackedUnit.HitPoints -= dmgTaken;
}
context.SaveChanges();
var otherUser = (game.RedUser == user) ? game.BlueUser : game.RedUser;
game.Turn++;
if (game.Units.Any(u => u.User == otherUser && u.HitPoints > 0))
{
game.UserInTurn = otherUser.Id;
var messageText = string.Format(GameMoveMessageText, user.Nickname, game.Title);
var gameMoveUserMessagesType = context.UserMessagesTypes.First(mt => mt.Type == GameMoveMessageType);
SendMessage(messageText, otherUser, game, gameMoveUserMessagesType, context);
}
else
{
var finishedGameStatus = context.Statuses.First(st => st.Value == GameStatusFinished);
game.Status = finishedGameStatus;
var finishedGameMessageType = context.UserMessagesTypes.First(umt => umt.Type == UserMessageTypeGameFinished);
var messageTextWinner = string.Format("You won in game {0} against {1} in {2} moves!", game.Title, otherUser.Nickname, game.Turn);
SendMessage(messageTextWinner, user, game, finishedGameMessageType, context);
var messageTextLoser = string.Format("You were beaten in game {0} by {1}", game.Title, user.Nickname);
SendMessage(messageTextLoser, otherUser, game, finishedGameMessageType, context);
var score = game.Units.Where(u => u.User == user && u.HitPoints > 0).Sum(u => u.HitPoints);
user.Scores.Add(new Score()
{
Value = score
});
}
context.SaveChanges();
}
}
public static void JoinGame(int userId, int gameId, string password)
{
if (password != null)
{
ValidateGamePassword(password);
}
var context = new BattleGameEntities();
using (context)
{
var user = GetUser(userId, context);
var game = context.Games.FirstOrDefault(g => g.Id == gameId);
if (game == null)
{
throw new ServerErrorException("No such game", "ERR_INV_GAME");
}
ValidateOpenGameStatus(game, context);
if (game.Password != null && game.Password != password)
{
throw new ServerErrorException("Invalid game password", "INV_GAME_PASS");
}
game.BlueUser = user;
string messageText = string.Format("{0} just joined your game {1}", game.BlueUser.Nickname, game.Title);
UserMessagesType gameJoinedUserMessageType = context.UserMessagesTypes.First(mt => mt.Type == UserMessageTypeGameJoined);
SendMessage(messageText, game.RedUser, game, gameJoinedUserMessageType, context);
var fullGameStatus = context.Statuses.First(st => st.Value == GameStatusFull);
game.Status = fullGameStatus;
context.SaveChanges();
}
}
public static void PerformDefend(int userId, int gameId, int unitId)
{
var context = new BattleGameEntities();
using (context)
{
var game = GetGame(gameId, context);
ValidateGameInProgressStatus(game, context);
var user = GetUser(userId, context);
var unit = GetUnit(unitId, context);
ValidateUserUnitInGame(user, unit, game);
unit.Mode = context.Modes.First(m => m.Value == UnitModeDefend);
var otherUser = (game.RedUser == user) ? game.BlueUser : game.RedUser;
game.Turn++;
game.UserInTurn = otherUser.Id;
context.SaveChanges();
}
}
