Day 10, part1

FailedCode · FailedCode · commit afcf3574581d · 2022-12-10T12:14:47.000+01:00
diff --git a/src/Days/Day10.php b/src/Days/Day10.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace Failedcode\Aoc2022\Days;
+
+class Day10 extends AbstractDay
+{
+    public function solve_part_1(): string
+    {
+        $changes = $this->getRegisterChanges();
+        $cycleSave = [
+            20 => 0,
+            60 => 0,
+            100 => 0,
+            140 => 0,
+            180 => 0,
+            220 => 0,
+        ];
+        $x = $cycle = 1;
+        foreach ($changes as $change) {
+            if (array_key_exists($cycle, $cycleSave)) {
+                $cycleSave[$cycle] = $x * $cycle;
+            }
+            $x += $change;
+            $cycle += 1;
+        }
+        return array_reduce($cycleSave, function($c, $v){ return $c + $v; });
+    }
+
+    public function solve_part_2(): string
+    {
+        return "TODO";
+    }
+
+    protected function getRegisterChanges()
+    {
+        $register = [];
+        $inputList = array_filter($this->util->loadInput(10), 'strlen');
+        foreach ($inputList as $row) {
+            if (trim($row) === 'noop') {
+                $register[] = 0;
+                continue;
+            }
+            if (preg_match('~addx (-?\d+)~', $row, $match)) {
+                $register[] = 0;
+                $register[] = (int)$match[1];
+            }
+        }
+        return $register;
+    }
+}
