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app/Casts/VectorCast.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Casts;
+
+use Illuminate\Contracts\Database\Eloquent\CastsAttributes;
+
+class VectorCast implements CastsAttributes
+{
+    public function get($model, string $key, $value, array $attributes): ?array
+    {
+        if ($value === null) {
+            return null;
+        }
+
+        if (is_array($value)) {
+            return $value;
+        }
+
+        $trimmed = trim((string) $value, '[]');
+        if ($trimmed === '') {
+            return [];
+        }
+
+        return array_map(static fn ($item) => (float) $item, explode(',', $trimmed));
+    }
+
+    public function set($model, string $key, $value, array $attributes): ?string
+    {
+        if ($value === null) {
+            return null;
+        }
+
+        $vector = array_map(static fn ($item) => (float) $item, $value);
+        return '['.implode(',', $vector).']';
+    }
+}