init backend presensi

app/Modules/Devices/Services/.gitkeep

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+# Devices Module - Services

app/Modules/Devices/Services/DeviceAuthService.php

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+<?php
+
+namespace App\Modules\Devices\Services;
+
+use App\Modules\Devices\Models\DeviceModel;
+
+/**
+ * Device Authentication Service
+ * 
+ * Handles device authentication logic.
+ */
+class DeviceAuthService
+{
+    protected DeviceModel $deviceModel;
+
+    public function __construct()
+    {
+        $this->deviceModel = new DeviceModel();
+    }
+
+    /**
+     * Authenticate device by device_code and api_key
+     * 
+     * @param string $deviceCode Device code
+     * @param string $apiKey API key
+     * @return array|null Returns device data if authenticated, null otherwise
+     */
+    public function authenticate(string $deviceCode, string $apiKey): ?array
+    {
+        // Find active device by device_code
+        $device = $this->deviceModel->findActiveByDeviceCode($deviceCode);
+
+        if (!$device) {
+            return null;
+        }
+
+        // For development: compare plain api_key
+        // In production, should use password_verify() with hashed api_key
+        if ($device->api_key !== $apiKey) {
+            return null;
+        }
+
+        // Update last_seen_at
+        $this->touchLastSeen($device->id);
+
+        return [
+            'device_id'   => $device->id,
+            'device_code' => $device->device_code,
+            'device_name' => $device->device_name,
+            'latitude'    => $device->latitude !== null ? (float) $device->latitude : null,
+            'longitude'   => $device->longitude !== null ? (float) $device->longitude : null,
+            'radius_meters' => $device->radius_meters !== null ? (int) $device->radius_meters : null,
+        ];
+    }
+
+    /**
+     * Update last_seen_at timestamp for device
+     * 
+     * @param int $deviceId Device ID
+     * @return void
+     */
+    public function touchLastSeen(int $deviceId): void
+    {
+        $this->deviceModel->updateLastSeen($deviceId);
+    }
+}