Move solutions out of the source itself

data/Y22/day3/Day3.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace trizz\AdventOfCode\Y22;
+
+use trizz\AdventOfCode\Solution;
+
+final class Day3 extends Solution
+{
+    public static null|int|string $part1ExampleResult = 157;
+
+    public static null|int|string $part1Result = 8053;
+
+    public static null|int|string $part2ExampleResult = 70;
+
+    public static null|int|string $part2Result = 2425;
+
+    /**
+     * @param array<int, string> $data
+     */
+    #[\Override]
+    public function part1(array $data): int
+    {
+        $result = 0;
+        foreach ($data as $rucksack) {
+            /** @var int<1, max> $length */
+            $length = max(1, strlen($rucksack) / 2);
+            [$left, $right] = str_split($rucksack, $length);
+            $result += $this->calculateScore([str_split($left), str_split($right)]);
+        }
+
+        return $result;
+    }
+
+    /**
+     * @param array<int, string> $data
+     */
+    #[\Override]
+    public function part2(array $data): int
+    {
+        $result = 0;
+        $groups = array_chunk($data, 3);
+        foreach ($groups as $group) {
+            $data = array_map(static fn ($items): array => str_split((string) $items), $group);
+            $result += $this->calculateScore($data);
+        }
+
+        return $result;
+    }
+
+    /**
+     * @param array<array<int, string>> $data
+     */
+    private function calculateScore(array $data = []): int
+    {
+        $items = array_unique(array_intersect(...$data));
+
+        $result = 0;
+
+        foreach ($items as $item) {
+            $position = ord(strtoupper($item)) - ord('A') + 1;
+            $result += $position + (ctype_upper($item) ? 26 : 0);
+        }
+
+        return $result;
+    }
+}