Proje dosyaları eklendi

app/Services/EarnDeviceIdentity.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Services;
+
+use RuntimeException;
+
+class EarnDeviceIdentity
+{
+    public function normalize(string $deviceId): string
+    {
+        return trim($deviceId);
+    }
+
+    public function valid(string $deviceId): bool
+    {
+        $length = strlen($deviceId);
+
+        return $length >= 4 && $length <= 255 && preg_match('/^[\x20-\x7E]+$/D', $deviceId) === 1;
+    }
+
+    public function hash(string $deviceId): string
+    {
+        $key = (string) config('earn.device.hash_key');
+        if (strlen($key) < 32) {
+            throw new RuntimeException('Earn device hashing is not configured.');
+        }
+
+        return hash_hmac('sha256', $this->normalize($deviceId), $key);
+    }
+
+    public function preview(string $deviceId): string
+    {
+        $normalized = $this->normalize($deviceId);
+
+        if (strlen($normalized) <= 10) {
+            return substr($normalized, 0, 2).'••••'.substr($normalized, -2);
+        }
+
+        return substr($normalized, 0, 6).'…'.substr($normalized, -5);
+    }
+}