r/Dailyprogrammer Challenge #200 Intermediate

rdp_200_intermediate.php

<?php

	/*
	*	r/Dailyprogammer Challenge #200 Intermediate
	*		coded by Michael Repper
	*		query [ a * t ] gridoodle [ d * o * t ] com
	*/


	function print_results($tile)
	{
	    echo $tile[2][0] . "x" . $tile[2][1] . " tile of character '" . $tile[0] . "' located at (" . $tile[1][0] . ',' . $tile[1][1] . ")<br />";
	}

	function count_tiles($tile_size)
	{
        	$file_name = 'tile_' . $tile_size[0] . '_' . $tile_size[1] . '.txt';
		$this_file = file_get_contents($file_name);
		$this_grid = array_map('str_split', explode("\n", $this_file));
		$corners = [];
		
		for ($i = 0; $i < count($this_grid); $i++)
		{
			for ($j = 0; $j < count($this_grid[$i]); $j++)
			{
				$this_char = $this_grid[$i][$j];
				
				if ($this_char !== '.')
				{
					if(($j - 1 < 0 || $this_grid[$i][$j - 1] === '.') && ($i - 1 < 0 || $this_grid[$i - 1][$j] === '.'))
					{
						$corners['top_left'][$this_char] = [$j, $i];
					}
					
					if (($j + 1 > $tile_size[0] - 1 || $this_grid[$i][$j + 1] === '.') && ($i + 1 > $tile_size[1] - 1 || $this_grid[$i + 1][$j] === '.')) 
					{
						if (array_key_exists($this_char, $corners['top_left']))
						{
							$top_left = $corners['top_left'][$this_char];
							$size = [$j - $top_left[0] + 1, $i - $top_left[1] + 1];
							print_results([$this_char, $top_left, $size]);
							unset($corners['top_left'][$this_char]);
						}
						
					}
				}
			}
		}
		
	}
	
	$grid_sizes = [ [74, 30], [4, 4], [10, 10] ];
	
	foreach ($grid_sizes as $grid)
	{
		count_tiles($grid);
		echo "<br />";
	}
	
?>