Monster Code Mk1

Module Module1

    Sub Main()
        Dim Choice As Integer = 0
        While Choice <> 9
            DisplayMenu()
            Choice = GetMainMenuChoice()
            Select Case Choice
                Case 1
                    Dim MyGame As New Game(False, False)
                Case 2
                    Dim MyGame As New Game(True, False)
                Case 3
                    Dim MyGame As New Game(False, True)
            End Select
        End While
    End Sub
    Public Sub DisplayMenu()
        Console.WriteLine("MAIN MENU")
        Console.WriteLine()
        Console.WriteLine("1. Start new game")
        Console.WriteLine("2. Play training game")
        Console.WriteLine("3. Load Game")
        Console.WriteLine("9. Quit")
        Console.WriteLine()
        Console.Write("Please enter your choice: ")
    End Sub
    Public Function GetMainMenuChoice() As Integer
        Dim Choice As Integer
        Choice = CInt(Console.ReadLine())
        Console.WriteLine()
        Return Choice
    End Function
    Structure CellReference
        Dim NoOfCellsEast As Integer
        Dim NoOfCellsSouth As Integer
    End Structure
    Class Game
        Const NS As Integer = 4
        Const WE As Integer = 6
        Private Player As New Character
        Private Cavern As New Grid(NS, WE)
        Private Monster As New Enemy
        Private Flask As New Item
        Private Trap1 As New Trap
        Private Trap2 As New Trap
        Private TrainingGame As Boolean
        Private Load As Boolean
        Public Sub New(ByVal IsATrainingGame As Boolean, ByVal IsALoadGame As Boolean)
            TrainingGame = IsATrainingGame
            Load = IsALoadGame
            Randomize()
            SetUpGame()
            Play()
        End Sub
        Public Sub Play()
            Dim Count As Integer
            Dim Eaten As Boolean
            Dim FlaskFound As Boolean
            Dim MoveDirection As Char
            Dim ValidMove As Boolean
            Dim Position As CellReference
            Eaten = False
            FlaskFound = False
            Cavern.Display(Monster.GetAwake)
            Do
                Do
                    DisplayMoveOptions()
                    MoveDirection = GetMove()
                    ValidMove = CheckValidMove(MoveDirection)
                Loop Until ValidMove
                If MoveDirection <> "M" Then
                    Cavern.PlaceItem(Player.GetPosition, " ")
                    Player.MakeMove(MoveDirection)
                    Cavern.PlaceItem(Player.GetPosition, "*")
                    Cavern.Display(Monster.GetAwake)
                    FlaskFound = Player.CheckIfSameCell(Flask.GetPosition)
                    If FlaskFound Then
                        DisplayWonGameMessage()
                    End If
                    Eaten = Monster.CheckIfSameCell(Player.GetPosition)
                    'This selection structure checks to see if the player has triggered one of the traps in the cavern
                    If Not Monster.GetAwake And Not FlaskFound And Not Eaten And
                   (Player.CheckIfSameCell(Trap1.GetPosition) And Not Trap1.GetTriggered Or
                   Player.CheckIfSameCell(Trap2.GetPosition) And Not Trap2.GetTriggered) Then
                        Monster.ChangeSleepStatus()
                        DisplayTrapMessage()
                        Cavern.Display(Monster.GetAwake)
                    End If
                    If Monster.GetAwake And Not Eaten And Not FlaskFound Then
                        Count = 0
                        Do
                            Cavern.PlaceItem(Monster.GetPosition, " ")
                            Position = Monster.GetPosition
                            Monster.MakeMove(Player.GetPosition)
                            Cavern.PlaceItem(Monster.GetPosition, "M")
                            If Monster.CheckIfSameCell(Flask.GetPosition) Then
                                Flask.SetPosition(Position)
                                Cavern.PlaceItem(Position, "F")
                            End If
                            Eaten = Monster.CheckIfSameCell(Player.GetPosition)
                            Console.WriteLine()
                            Console.WriteLine("Press Enter key to continue")
                            Console.ReadLine()
                            Cavern.Display(Monster.GetAwake)
                            Count = Count + 1
                        Loop Until Count = 2 Or Eaten
                    End If
                    If Eaten Then
                        DisplayLostGameMessage()
                    End If
                End If
            Loop Until Eaten Or FlaskFound Or MoveDirection = "M"
        End Sub
        Public Sub DisplayMoveOptions()
            Console.WriteLine()
            Console.WriteLine("Enter N to move NORTH")
            Console.WriteLine("Enter S to move SOUTH")
            Console.WriteLine("Enter E to move EAST")
            Console.WriteLine("Enter W to move WEST")
            Console.WriteLine("Enter Q to Save Game")
            Console.WriteLine("Enter M to return to the Main Menu")
            Console.WriteLine()
        End Sub
        Public Function GetMove() As Char
            Dim Move As Char
            Move = Console.ReadLine
            Console.WriteLine()
            Return Move
        End Function
        Public Sub DisplayWonGameMessage()
            Console.WriteLine("Well done! You have found the flask containing the Styxian potion.")
            Console.WriteLine("You have won the game of MONSTER!")
            Console.WriteLine()
        End Sub
        Public Sub DisplayTrapMessage()
            Console.WriteLine("On no! You have set off a trap. Watch out, the monster is now awake!")
            Console.WriteLine()
        End Sub
        Public Sub DisplayLostGameMessage()
            Console.WriteLine("ARGHHHHHH! The monster has eaten you. GAMEOVER.")
            Console.WriteLine("Maybe you will have better luck next time you play MONSTER! ")
            Console.WriteLine()
        End Sub
        Public Function CheckValidMove(ByVal Direction As Char) As Boolean
            Dim ValidMove As Boolean
            ValidMove = True
            If Not (Direction = "N" Or Direction = "S" Or Direction = "W" Or
           Direction = "E" Or Direction = "M" Or Direction = "Q") Then
                ValidMove = False
            End If
            If Direction = "E" And Player.GetPosition.NoOfCellsEast = 6 Then ValidMove = False
            If Direction = "W" And Player.GetPosition.NoOfCellsEast = 0 Then ValidMove = False
            If Direction = "S" And Player.GetPosition.NoOfCellsSouth = 4 Then ValidMove = False
            If Direction = "N" And Player.GetPosition.NoOfCellsSouth = 0 Then ValidMove = False
            If Direction = "Q" Then SaveGame()
            Return ValidMove
        End Function
        Public Sub SaveGame()
            Dim Save As New System.IO.StreamWriter("savegame.txt")
            Save.Write(Monster.GetPosition.NoOfCellsEast)
            Save.Write(Monster.GetPosition.NoOfCellsSouth)
            Save.Write(Player.GetPosition.NoOfCellsEast)
            Save.Write(Player.GetPosition.NoOfCellsSouth)
            Save.Write(Trap1.GetPosition.NoOfCellsEast)
            Save.Write(Trap1.GetPosition.NoOfCellsSouth)
            Save.Write(Trap2.GetPosition.NoOfCellsEast)
            Save.Write(Trap2.GetPosition.NoOfCellsSouth)
            Save.Write(Flask.GetPosition.NoOfCellsEast)
            Save.Write(Flask.GetPosition.NoOfCellsSouth)
            Save.WriteLine(Trap1.GetTriggered)
            Save.WriteLine(Trap2.GetTriggered)
            Save.WriteLine(Monster.GetAwake)
            Save.Close()
        End Sub
        Public Sub LoadGame()
            Dim Load As New System.IO.StreamReader("savegame.txt")
            Dim Position As CellReference
            Position.NoOfCellsEast = Val(Chr(Load.Read))
            Position.NoOfCellsSouth = Val(Chr(Load.Read))
            Monster.SetPosition(Position)
            Cavern.PlaceItem(Position, "M")
            Position.NoOfCellsEast = Val(Chr(Load.Read))
            Position.NoOfCellsSouth = Val(Chr(Load.Read))
            Player.SetPosition(Position)
            Cavern.PlaceItem(Position, "*")
            Position.NoOfCellsEast = Val(Chr(Load.Read))
            Position.NoOfCellsSouth = Val(Chr(Load.Read))
            Trap1.SetPosition(Position)
            Position.NoOfCellsEast = Val(Chr(Load.Read))
            Position.NoOfCellsSouth = Val(Chr(Load.Read))
            Trap2.SetPosition(Position)
            Position.NoOfCellsEast = Val(Chr(Load.Read))
            Position.NoOfCellsSouth = Val(Chr(Load.Read))
            Flask.SetPosition(Position)
            Cavern.PlaceItem(Position, "F")
            If Load.ReadLine = "True" Then Trap1.ToggleTrap()
            If Load.ReadLine = "True" Then Trap2.ToggleTrap()
            If Load.ReadLine = "True" Then Monster.ChangeSleepStatus()
            Load.Close()
        End Sub
        Public Function SetPositionOfItem(ByVal Item As Char) As CellReference
            Dim Position As CellReference
            Do
                Position = GetNewRandomPosition()
            Loop Until Cavern.IsCellEmpty(Position)
            Cavern.PlaceItem(Position, Item)
            Return Position
        End Function
        Public Sub SetUpGame()
            Dim Position As CellReference
            Cavern.Reset()
            If Load Then
                LoadGame()
            Else

                If Not TrainingGame Then
                    Position.NoOfCellsEast = 0
                    Position.NoOfCellsSouth = 0
                    Player.SetPosition(Position)
                    Cavern.PlaceItem(Position, "*")
                    Trap1.SetPosition(SetPositionOfItem("T"))
                    Trap2.SetPosition(SetPositionOfItem("T"))
                    Monster.SetPosition(SetPositionOfItem("M"))
                    Flask.SetPosition(SetPositionOfItem("F"))
                Else
                    Position.NoOfCellsEast = 4
                    Position.NoOfCellsSouth = 2
                    Player.SetPosition(Position)
                    Cavern.PlaceItem(Position, "*")
                    Position.NoOfCellsEast = 6
                    Position.NoOfCellsSouth = 2
                    Trap1.SetPosition(Position)
                    Cavern.PlaceItem(Position, "T")
                    Position.NoOfCellsEast = 4
                    Position.NoOfCellsSouth = 3
                    Trap2.SetPosition(Position)
                    Cavern.PlaceItem(Position, "T")
                    Position.NoOfCellsEast = 4
                    Position.NoOfCellsSouth = 0
                    Monster.SetPosition(Position)
                    Cavern.PlaceItem(Position, "M")
                    Position.NoOfCellsEast = 3
                    Position.NoOfCellsSouth = 1
                    Flask.SetPosition(Position)
                    Cavern.PlaceItem(Position, "F")
                End If
            End If
        End Sub
        Public Function GetNewRandomPosition() As CellReference
            Dim Position As CellReference
            Do
                Position.NoOfCellsSouth = Int(Rnd() * (NS + 1))
                Position.NoOfCellsEast = Int(Rnd() * (WE + 1))
            Loop Until Position.NoOfCellsSouth > 0 Or Position.NoOfCellsEast > 0
            Return Position
        End Function
    End Class
    Class Grid
        Private NS As Integer
        Private WE As Integer
        Private CavernState(,) As Char
        Public Sub New(ByVal S As Integer, ByVal E As Integer)
            NS = S
            WE = E
            ReDim CavernState(NS, WE)
        End Sub
        Public Sub Reset()
            Dim Count1 As Integer
            Dim Count2 As Integer
            For Count1 = 0 To NS
                For Count2 = 0 To WE
                    CavernState(Count1, Count2) = " "
                Next
            Next
        End Sub
        Public Sub Display(ByVal MonsterAwake As Boolean)
            Dim Count1 As Integer
            Dim Count2 As Integer
            For Count1 = 0 To NS
                Console.WriteLine(" ------------- ")

                For Count2 = 0 To WE
                    If CavernState(Count1, Count2) = " " Or CavernState(Count1,
                   Count2) = "*" Or (CavernState(Count1, Count2) = "M" And MonsterAwake) Then
                        Console.Write("|" & CavernState(Count1, Count2))
                    Else
                        Console.Write("| ")
                    End If
                Next
                Console.WriteLine("|")
            Next
            Console.WriteLine(" ------------- ")
            Console.WriteLine()
        End Sub
        Public Sub PlaceItem(ByVal Position As CellReference, ByVal Item As Char)
            CavernState(Position.NoOfCellsSouth, Position.NoOfCellsEast) = Item
        End Sub
        Public Function IsCellEmpty(ByVal Position As CellReference) As Boolean
            If CavernState(Position.NoOfCellsSouth, Position.NoOfCellsEast) = " " Then
                Return True
            Else
                Return False
            End If
        End Function
    End Class
    Class Enemy
        Inherits Item
        Private Awake As Boolean
        Public Overridable Sub MakeMove(ByVal PlayerPosition As CellReference)
            If NoOfCellsSouth < PlayerPosition.NoOfCellsSouth Then
                NoOfCellsSouth = NoOfCellsSouth + 1
            ElseIf NoOfCellsSouth > PlayerPosition.NoOfCellsSouth Then
                NoOfCellsSouth = NoOfCellsSouth - 1
            ElseIf NoOfCellsEast < PlayerPosition.NoOfCellsEast Then
                NoOfCellsEast = NoOfCellsEast + 1
            Else
                NoOfCellsEast = NoOfCellsEast - 1
            End If
        End Sub
        Public Function GetAwake() As Boolean
            Return Awake
        End Function
        Public Overridable Sub ChangeSleepStatus()
            If Awake Then
                Awake = False
            Else
                Awake = True
            End If
        End Sub
        Public Sub New()
            Awake = False
        End Sub
    End Class

    Class Character
        Inherits Item
        Public Sub MakeMove(ByVal Direction As Char)
            Select Case Direction
                Case "N"
                    NoOfCellsSouth = NoOfCellsSouth - 1
                Case "S"
                    NoOfCellsSouth = NoOfCellsSouth + 1
                Case "W"
                    NoOfCellsEast = NoOfCellsEast - 1
                Case "E"
                    NoOfCellsEast = NoOfCellsEast + 1
            End Select
        End Sub
    End Class
    Class Trap
        Inherits Item
        Private Triggered As Boolean
        Public Function GetTriggered() As Boolean
            Return Triggered
        End Function
        Public Sub New()
            Triggered = False
        End Sub
        Public Sub ToggleTrap()
            Triggered = Not Triggered
        End Sub
    End Class
    Class Item
        Protected NoOfCellsEast As Integer
        Protected NoOfCellsSouth As Integer
        Public Function GetPosition() As CellReference
            Dim Position As CellReference
            Position.NoOfCellsEast = NoOfCellsEast
            Position.NoOfCellsSouth = NoOfCellsSouth
            Return Position
        End Function
        Public Sub SetPosition(ByVal Position As CellReference)
            NoOfCellsEast = Position.NoOfCellsEast
            NoOfCellsSouth = Position.NoOfCellsSouth
        End Sub
        Public Function CheckIfSameCell(ByVal Position As CellReference) As Boolean
            If NoOfCellsEast = Position.NoOfCellsEast And NoOfCellsSouth =
           Position.NoOfCellsSouth Then
                Return True
            Else
                Return False
            End If
        End Function
    End Class
End Module