<?php
class minechecker
{
	/*
	MineChecker 1.0.0 Copyright (C) 2005 Murat ATAY
	
	This library is free software; you can redistribute it and/or modify it
	under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation; either version 2.1 of the License,
	or (at your option) any later version.
	
	This library is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	See the GNU Lesser General Public License for more details.
	
	You should have received a copy of the GNU Lesser General Public License
	along with this library; if not,write to the
	Free Software Foundation, Inc.,
	59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/

	var $errno = 0;
	var $errmsg = NULL;
	var $status = 0;

	var $width;	var $height;	var $nofmines;
	var $area;

	function minechecker() {}

	function autowincheck()
	{
		for ($i = 1; $i <= $this->height; $i++)
		{
			for ($j = 1; $j <= $this->width; $j++)
			{
				if ($this->area[$i][$j] > 0 && $this->area[$i][$j] != 9 && $this->area[$i][$j] != 90) return;
			}
		}

		$this->status = 1;
	}

	function wincheck()
	{
		for ($i = 1; $i <= $this->height; $i++)
		{
			for ($j = 1; $j <= $this->width; $j++)
			{
				if ($this->area[$i][$j] == 9)
				{
					$this->status = -1;
					return;
				}
			}
		}

		$this->status = 1;
	}

	function flagarea($x, $y)
	{
		$x = (int) $x;	$y = (int) $y;

		if ($x && $y)
		{
			if ($x >= 1 && $x <= $this->width && $y >= 1 && $y <= $this->height)
			{
				if ($this->area[$y][$x] == 0)
				{
					$this->area[$y][$x] = 100;
					return;
				}
				elseif ($this->area[$y][$x] == 100)
				{
					$this->area[$y][$x] = 0;
					return;
				}
				elseif ($this->area[$y][$x] > 0 && $this->area[$y][$x] < 10)
				{
					$this->area[$y][$x] = $this->area[$y][$x] * 10;
					return;
				}
				elseif ($this->area[$y][$x] >= 10)
				{
					$this->area[$y][$x] = $this->area[$y][$x] / 10;
					return;
				}
			}
		}
	}

	function openarea($x, $y)
	{
		$x = (int) $x;	$y = (int) $y;

		if ($x && $y)
		{
			if ($x >= 1 && $x <= $this->width && $y >= 1 && $y <= $this->height)
			{
				if ($this->area[$y][$x] == 9 || $this->area[$y][$x] == 90)
				{
					$this->area[$y][$x] = -9;
					$this->status = -1;
					return;
				}
				elseif ($this->area[$y][$x] >= 0)
				{
					$this->openbox($x, $y);
					$this->autowincheck();
				}
			}
		}
	}

	function openbox($x, $y)
	{
		if (!($x >= 1 && $x <= $this->width && $y >= 1 && $y <= $this->height)) return;
		if ($this->area[$y][$x] < 0 || $this->area[$y][$x] == 9 || $this->area[$y][$x] == 90)
		{
			return;
		}
		elseif ($this->area[$y][$x] > 0 && $this->area[$y][$x] != 100)
		{
			$this->area[$y][$x] = $this->area[$y][$x] * -1;
			return;
		}
		else
		{
			$this->area[$y][$x] = -10;
			$this->openbox($x - 1, $y);
			$this->openbox($x - 1, $y - 1);
			$this->openbox($x - 1, $y + 1);
			$this->openbox($x + 1, $y);
			$this->openbox($x + 1, $y - 1);
			$this->openbox($x + 1, $y + 1);
			$this->openbox($x, $y - 1);
			$this->openbox($x, $y + 1);
			return;
		}
	}

	function loadarea($area)
	{
		$this->area = $area;

		$this->height = count($area);
		$this->width = count($area[1]);

		for ($i = 1; $i <= $this->height; $i++)
		{
			for ($j = 1; $j <= $this->width; $j++)
			{
				if ($this->area[$i][$j] == 9) $this->nofmines++;
			}
		}
	}

	function newarea($width, $height, $nofmines)
	{
		$this->width = (int) $width;	$this->height = (int) $height;	$this->nofmines = (int) $nofmines;

		if ($this->nofmines > ($this->width * $this->height))
		{
			$this->errno = -1; $this->errmsg = 'Check mine number.'; return;
		}

		for ($i = 1; $i <= $this->height; $i++)
		{
			for ($j = 1; $j <= $this->width; $j++)
			{
				$this->area[$i][$j] = 0;
			}
		}

		$i = 0;

		while ($i < $this->nofmines)
		{
			$x = rand(1, $this->width);	$y = rand(1, $this->height);

			if ($this->area[$y][$x] != 9)
			{
				$this->area[$y][$x] = 9;

				if ($x > 1)
				{
					if ($this->area[$y][$x - 1] != 9) $this->area[$y][$x - 1]++;

					if ($y > 1)
					{
						if ($this->area[$y - 1][$x - 1] != 9) $this->area[$y - 1][$x - 1]++;
					}
					if ($y < $this->height)
					{
						if ($this->area[$y + 1][$x - 1] != 9) $this->area[$y + 1][$x - 1]++;
					}
				}
				if ($x < $this->width)
				{
					if ($this->area[$y][$x + 1] != 9) $this->area[$y][$x + 1]++;

					if ($y > 1)
					{
						if ($this->area[$y - 1][$x + 1] != 9) $this->area[$y - 1][$x + 1]++;
					}
					if ($y < $this->height)
					{
						if ($this->area[$y + 1][$x + 1] != 9) $this->area[$y + 1][$x + 1]++;
					}
				}
				if ($y > 1)
				{
					if ($this->area[$y - 1][$x] != 9) $this->area[$y - 1][$x]++;
				}
				if ($y < $this->height)
				{
					if ($this->area[$y + 1][$x] != 9) $this->area[$y + 1][$x]++;
				}

				$i++;
			}
		}
	}
}
?>