good

app/Services/CouponService.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Coupon;
+use Illuminate\Database\UniqueConstraintViolationException;
+use Illuminate\Support\Str;
+
+class CouponService
+{
+    public function findOrCreateForPhone(string $phone): Coupon
+    {
+        $existing = Coupon::query()->where('phone', $phone)->first();
+
+        if ($existing) {
+            return $existing;
+        }
+
+        return $this->createWithUniqueCode($phone);
+    }
+
+    private function createWithUniqueCode(string $phone): Coupon
+    {
+        for ($attempt = 0; $attempt < 10; $attempt++) {
+            try {
+                return Coupon::query()->create([
+                    'phone' => $phone,
+                    'code' => $this->generateCouponCode(),
+                ]);
+            } catch (UniqueConstraintViolationException) {
+                continue;
+            }
+        }
+
+        throw new \RuntimeException('Unable to generate a unique coupon code.');
+    }
+
+    private function generateCouponCode(): string
+    {
+        $x = random_int(1, 9);
+        $yyyy = Str::upper(Str::random(4));
+
+        return "{$x}_{$yyyy}";
+    }
+}

app/Services/OtpService.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace App\Services;
+
+use App\Enums\OtpVerificationResult;
+use App\Models\PhoneVerification;
+use Illuminate\Support\Facades\Hash;
+
+class OtpService
+{
+    public const OTP_EXPIRY_MINUTES = 10;
+
+    public function issue(string $phone): bool
+    {
+        $otp = $this->generateOtp();
+
+        PhoneVerification::query()->updateOrCreate(
+            ['phone' => $phone],
+            [
+                'otp' => Hash::make($otp),
+                'expires_at' => now()->addMinutes(self::OTP_EXPIRY_MINUTES),
+                'verified' => false,
+            ],
+        );
+
+        return sendSMS($phone, 'Tassyklaýyş belgi: '.$otp);
+    }
+
+    public function verify(string $phone, string $otp): OtpVerificationResult
+    {
+        $verification = PhoneVerification::query()->where('phone', $phone)->first();
+
+        if (! $verification) {
+            return OtpVerificationResult::Invalid;
+        }
+
+        if ($verification->expires_at->isPast()) {
+            return OtpVerificationResult::Expired;
+        }
+
+        if (! Hash::check($otp, $verification->otp)) {
+            return OtpVerificationResult::Invalid;
+        }
+
+        $verification->update(['verified' => true]);
+
+        return OtpVerificationResult::Verified;
+    }
+
+    private function generateOtp(): string
+    {
+        return (string) random_int(1000, 9999);
+    }
+}