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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| // | ||
| // GameLogicModel.swift | ||
| // TicTacToe | ||
| // | ||
| // Created by Ashborn on 18/03/23. | ||
| // | ||
|
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| import Foundation | ||
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| struct GameLogicModel { | ||
| private(set) var moves: [VersusAIModel.Move?] | ||
| private var aiVM: VersusAIViewModel | ||
| private var humanMoves: [VersusAIModel.Move] | ||
| private var computerMoves: [VersusAIModel.Move] | ||
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| init(currentMove: [VersusAIModel.Move?]) { | ||
| moves = currentMove | ||
| aiVM = VersusAIViewModel() | ||
|
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| // Get human positions to block | ||
| humanMoves = moves.compactMap { $0 }.filter { $0.player == .human } | ||
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| // Get computer positions to win | ||
| computerMoves = moves.compactMap { $0 }.filter { $0.player == .computer } | ||
| } | ||
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| func pickRandomSquare() -> Int { | ||
| var randomPosition = Int.random(in: 0..<9) | ||
|
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| // If square is occupied, pick any other | ||
| while aiVM.isSquareOccupied(in: moves, forIndex: randomPosition) { | ||
| randomPosition = Int.random(in: 0..<9) | ||
| } | ||
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| return randomPosition | ||
| } | ||
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| func pickMiddleSquare() -> Int { | ||
| let centerSquare = 4 | ||
| if !aiVM.isSquareOccupied(in: moves, forIndex: centerSquare) { | ||
| return centerSquare | ||
| } | ||
|
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| return -1 | ||
| } | ||
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| func pickCornerSquare() -> Int { | ||
| let corners: [Int] = [0, 2, 6, 8] | ||
| for corner in corners { | ||
| if !aiVM.isSquareOccupied(in: moves, forIndex: corner) { | ||
| return corner | ||
| } | ||
| } | ||
|
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| return -1 | ||
| } | ||
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| func blockWin(patterns: Set<Set<Int>>) -> Int { | ||
| let humanPositions = Set(humanMoves.map { $0.boardIndex }) | ||
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| for pattern in patterns { | ||
| let blockPositions = pattern.subtracting(humanPositions) | ||
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| if blockPositions.count == 1 { | ||
| let isBlockable = !aiVM.isSquareOccupied(in: moves, forIndex: blockPositions.first!) | ||
| if isBlockable { return blockPositions.first! } | ||
| } | ||
| } | ||
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| return -1 | ||
| } | ||
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| func winGame(patterns: Set<Set<Int>>) -> Int { | ||
| let computerPositions = Set(computerMoves.map { $0.boardIndex }) | ||
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| for pattern in patterns { | ||
| let winPositions = pattern.subtracting(computerPositions) | ||
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| if winPositions.count == 1 { | ||
| let isAvailable = !aiVM.isSquareOccupied(in: moves, forIndex: winPositions.first!) | ||
| if isAvailable { return winPositions.first! } | ||
| } | ||
| } | ||
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| return -1 | ||
| } | ||
| } |
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