Refactor framework to support more years

2021-12-09 22:41:22 +01:00
parent d3cd95aed2
commit 9891975d0f
56 changed files with 1257 additions and 1084 deletions
--- a/src/Y21/Day2.php
+++ b/src/Y21/Day2.php
@ -0,0 +1,79 @@
+<?php
+
+namespace trizz\AdventOfCode\Y21;
+
+use trizz\AdventOfCode\Solution;
+
+class Day2 extends Solution
+{
+    public static int|string|null $part1ExampleResult = 150;
+    public static int|string|null $part1Result = 1654760;
+
+    public static int|string|null $part2ExampleResult = 900;
+    public static int|string|null $part2Result = 1956047400;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function part1(array $data): int
+    {
+        $depth = 0;
+        $horizontal = 0;
+
+        foreach ($data as $current) {
+            /**
+             * @var string $direction
+             * @var int    $distance
+             */
+            [$direction, $distance] = explode(' ', $current);
+
+            match ($direction) {
+                'forward' => $horizontal += $distance,
+                'down' => $depth += $distance,
+                'up' => $depth -= $distance,
+                default => null,
+            };
+        }
+
+        return $depth * $horizontal;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function part2(array $data): int
+    {
+        $aim = 0;
+        $depth = 0;
+        $horizontal = 0;
+
+        foreach ($data as $current) {
+            /**
+             * @var string $direction
+             * @var int    $distance
+             */
+            [$direction, $distance] = explode(' ', $current);
+
+            // Can't use 'match' here because of the multiple expressions for 'forward'.
+            switch ($direction) {
+                case 'forward':
+                    $horizontal += $distance;
+                    $depth += $distance * $aim;
+
+                    break;
+
+                case 'down':
+                    $aim += $distance;
+
+                    break;
+
+                case 'up':
+                    $aim -= $distance;
+
+                    break;
+            }
+        }
+
+        return $horizontal * $depth;
+    }
+}