CONV-260: Create CreditPackRepository

app/Data/Billing/CreditPackDto.php

@@ -10,7 +10,7 @@ public function __construct(
         public string $key,
         public string $label,
         public int $credits,
-        public string $stripePriceId,
+        public ?string $stripePriceId,
         public string $description,
     ) {}
 

app/Services/Billing/CreditPackRepository.php

@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services\Billing;
+
+use App\Data\Billing\CreditPackDto;
+use Illuminate\Support\Collection;
+
+final class CreditPackRepository
+{
+    /** @return Collection<int, CreditPackDto> */
+    public function all(): Collection
+    {
+        return collect($this->packsConfig())
+            ->map(fn (array $config, string $key) => CreditPackDto::fromConfig($key, $config))
+            ->values();
+    }
+
+    public function find(string $key): ?CreditPackDto
+    {
+        $config = $this->packsConfig();
+
+        if (! array_key_exists($key, $config)) {
+            return null;
+        }
+
+        return CreditPackDto::fromConfig($key, $config[$key]);
+    }
+
+    public function findOrFail(string $key): CreditPackDto
+    {
+        $pack = $this->find($key);
+
+        if ($pack === null) {
+            throw new \InvalidArgumentException("Unknown credit pack key: {$key}");
+        }
+
+        return $pack;
+    }
+
+    public function findByStripePriceId(string $stripePriceId): ?CreditPackDto
+    {
+        return $this->all()->first(fn (CreditPackDto $pack) => $pack->stripePriceId === $stripePriceId);
+    }
+
+    private function packsConfig(): array
+    {
+        return config('billing.credit_packs', []);
+    }
+}

tests/Unit/Billing/CreditPackRepositoryTest.php

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Data\Billing\CreditPackDto;
+use App\Services\Billing\CreditPackRepository;
+
+it('returns all credit packs', function () {
+    $packs = app(CreditPackRepository::class)->all();
+
+    expect($packs)->not->toBeEmpty();
+    expect($packs->first())->toBeInstanceOf(CreditPackDto::class);
+});
+
+it('finds credit pack by key', function () {
+    $pack = app(CreditPackRepository::class)->findOrFail('small');
+
+    expect($pack->key)->toBe('small');
+});
+
+it('throws for unknown credit pack key', function () {
+    app(CreditPackRepository::class)->findOrFail('unknown');
+})->throws(InvalidArgumentException::class);
+
+it('finds credit pack by stripe price id', function () {
+    config()->set('billing.credit_packs.small.stripe_price_id', 'price_small');
+
+    $pack = app(CreditPackRepository::class)->findByStripePriceId('price_small');
+
+    expect($pack?->key)->toBe('small');
+});
+
+it('returns null for unknown stripe price id', function () {
+    $pack = app(CreditPackRepository::class)->findByStripePriceId('price_nonexistent');
+
+    expect($pack)->toBeNull();
+});