Taeluf.com

part1

#!/usr/bin/env php
<?php
/**
 * Add the game ids where 12 red cubese, 13 green cubes, & 14 blue cubes is enough to satisfy the game
 */

//$input = file_get_contents(__DIR__.'/sample.txt');
$input = file_get_contents(__DIR__.'/input.txt');

$expected_output = '';

//$game_lines = explode("\n", trim($input));

$lines = explode("\n", trim($input));

$total = 0;

foreach ($lines as $line_num => $line){
    $chars = str_split($line);

    $next = $chars[0];
    $cur_num = null;

    $is_cur_num_valid = false;


    $nums = [];

    foreach ($chars as $index=>$c){
        $next = $chars[$index+1];

        if (is_numeric($c)
            && $cur_num === null) $cur_num = $c;
        else if (is_numeric($c)) $cur_num .= $c;

        if (is_numeric($c) && $is_cur_num_valid == false){
            // [line_num, char_num]
            // 
            $positions = [ 
                [$line_num - 1, $index - 1], [$line_num - 1, $index], [$line_num - 1, $index+1], 
                [$line_num, $index - 1], [$line_num, $index+1], 
                [$line_num + 1, $index - 1], [$line_num + 1, $index], [$line_num + 1, $index+1], 
            ];

            foreach ($positions as $position){
                $pos_line = $position[0];
                $pos_char = $position[1];
                $line = $lines[$pos_line] ?? "";
                $char = str_split($line)[$pos_char] ?? null;
                if ($line == null || $char == null)continue;
                if (!is_numeric($char) && $char != '.')$is_cur_num_valid = true;
            }

        }

        if (!is_numeric($c)){
            if ($is_cur_num_valid){
               $add = (int)$cur_num;
               $total += $add;
            }
           $cur_num = null;
           $is_cur_num_valid = false;
        }
    }

    if ($is_cur_num_valid){
       $add = (int)$cur_num;
       $total += $add;
    }
}


echo "\n\nSum of parts: ". $total."\n\n";