Contract con_tictactoe_v12

  

    

      

        

            
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### # This is a simple smart contract # All Lamden smart contracts are programmed in Python # For complete contracting documentation please visit https://contracting.lamden.io/ ### 
          

            
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random.seed() 
          

            
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games = Hash(default_value=False)
          

            
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metadata = Hash() 
          

            
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@construct 
          

            
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def seed(): 
          

            
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    metadata['operator'] = ctx.caller 
          

            
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@export 
          

            
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def create_game(): 
          

            
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    sender = ctx.caller 
          

            
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    assert(games[sender] != False, 'Game already in progress')
          

            
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    first = random.randint(0, 99) 
          

            
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    # 0 = not set, 1 = O, 2 = X 
          

            
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    if(first <50): first = 1 # Player goes first else: first = 2 # Computer goes first 
          

            
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    games[sender] = {'first': first, 'state': [0, 0, 0, 0, 0, 0, 0, 0, 0], 'turn': 0} 
          

            
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    return games[sender] 
          

            
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@export 
          

            
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def end_game(): 
          

            
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    games[ctx.caller] = False
          

            
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@export
          

            
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def player_selection(i: int):
          

            
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    sender = ctx.caller
          

            
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    assert(games[sender] == False, 'No game already in progress')
          

            
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    games[sender]['state'][i] = 1
          

            
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    assert(games[sender]['state'][i] == 0, f'square {i} is already closed')
          

            
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    games[sender]['turn'] = games[sender]['turn'] + 1
          

            
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    win = False 
          

            
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    if(games[sender]['turn'] >= 9): 
          

            
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        return "{'winner': 'none', 'state': " + f"{games[sender]['state']}" + "}" 
          

            
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    if(games[sender]['turn'] >= 5): 
          

            
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        win = checkWin(games[sender]['state'], 1) 
          

            
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    elif(win == 1): 
          

            
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        games[sender] = False
          

            
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        return "{'winner': sender, 'state': " + f"{games[sender]['state']}" +"}"
          

            
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    else: 
          

            
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        computerSelects = random.randint(0, 8) 
          

            
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        while(games[sender]['state'][computerSelects] != 0):
          

            
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            computerSelects = random.randint(0, 8)
          

            
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        games[sender]['state'][computerSelects] = 2
          

            
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        games[sender]['turn'] = games[sender]['turn'] + 1
          

            
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        if(games[sender]['turn'] >= 9):
          

            
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            games[sender] = False
          

            
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            return "{'winner': 'none', 'state': " + f"{games[sender]['state']}" + "}"
          

            
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        if(games[sender]['turn'] >= 5):
          

            
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            win = checkWin(games[sender]['state'], 2) 
          

            
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        elif(win == 2): 
          

            
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            games[sender] = False 
          

            
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            return "{'winner': 'computer', 'state': " + f"{games[sender]['state']}" + "}" 
          

            
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    return f'{games[sender]}'
          

            
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def checkWin(state, x): 
          

            
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    if(state[0] == x): # top left
          

            
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        if(state[1] == x and state[1] == x): #top row 
          

            
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            return x
          

            
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        if(state[3] == x and state[6] == x): #left column
          

            
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            return x
          

            
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        if(state[4] == x and state[8] == x): # diagnal top left to bottom right 
          

            
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            return x
          

            
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    if(state[1] == x): # top middle 
          

            
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        if(state[4] == x and state[7] == x): # middle column
          

            
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            return x 
          

            
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    if(state[2] == x): # top right 
          

            
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        if(state[5] == x and state[8] == x): #right column 
          

            
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            return x
          

            
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        if(state[4] == x and state[6] == x): # diagnal top right to bottom left 
          

            
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            return x
          

            
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    if(state[3] == x): # top middle
          

            
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        if(state[4] == x and state[5] == x): # middle row 
          

            
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            return x
          

            
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    if(state[6] == x): # top middle
          

            
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        if(state[7] == x and state[8] == x): # bottom row 
          

            
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            return x
          
      
    
  
  

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