CIiP-WS-2021-2022-Projektarbeit_tims/src/main/java/de/tims/tictactoe/GameLogic.java

package de.tims.tictactoe;

public class GameLogic {
	
	private char[][] board;
	private final char[] occupiedFields = { 'x', 'o' };

	public GameLogic(int size) {
		if (size < 3) {
			size = 3;
		}
		this.board = new char[size][size];
		
		for (int i = 0; i < this.board.length; i++) {
			for (int j = 0; j < this.board[0].length; j++) {
				this.setField(i, j, '-');
			}
		}
	}

	public GameLogic(char[][] board) {
		this.board = board;
	}

	public char[][] getBoard() {
		return this.board;
	}

	public int countFields() {
		return this.board[0].length * this.board.length;
	}

	public void setField(int column, int row, char player) {
		if(fieldIsEmpty(column, row)) this.board[column][row] = player;
	}

	public boolean fieldIsEmpty(int column, int row) {
		for (char field : this.occupiedFields) {
			if (this.board[column][row] == field) return false;
		}
		return true;
	}
	
	public boolean checkForWin(char player) {
		boolean finished = false;
		int countFields = 0;

		// check columns
		for (int i = 0; i < this.board.length; i++) {
			for (int j = 0; j < this.board[0].length; j++) {
				if(board[j][i] == player) countFields++;
			}
			if(countFields == this.board.length) return finished = true;
			countFields = 0;	
		}
		countFields = 0;
		
		// check rows
		for (int i = 0; i < this.board[0].length; i++) {
			for (int j = 0; j < this.board.length; j++) {
				 if(board[i][j] == player) countFields++;
			}
			if(countFields == this.board.length) return finished = true;
			countFields = 0;
		}
		
		// check diagonal left
        for (int i = this.board.length - 1, j = this.board.length - 1; i >= 0 ; i--, j--) {
            if (board[i][j] == player) countFields++;
        }
        if(countFields == this.board.length) return finished = true;
        countFields = 0;
        
        // check diagonal right
        for (int i = this.board.length - 1, j = 0; i >= 0 ; i--, j++) {
            if (board[i][j] == player) countFields++;
        }
        if(countFields == this.board.length) return finished = true;

		return finished;
	}

}