Add validation for cancelled listing (#6)

lang/en/validation.php

@@ -3,4 +3,5 @@
 return [
     'future_block'=> 'The :attribute must be at least :block.',
     'enough_token_supply' => 'The token supply is not enough.',
+    'listing_not_cancelled' => 'The listing is already cancelled.',
 ];

src/GraphQL/Mutations/CancelListingMutation.php

@@ -5,12 +5,12 @@
 use Closure;
 use Enjin\Platform\GraphQL\Types\Input\Substrate\Traits\HasIdempotencyField;
 use Enjin\Platform\Interfaces\PlatformBlockchainTransaction;
+use Enjin\Platform\Marketplace\Rules\ListingNotCancelled;
 use Enjin\Platform\Marketplace\Services\TransactionService;
 use Enjin\Platform\Models\Transaction;
 use GraphQL\Type\Definition\ResolveInfo;
 use GraphQL\Type\Definition\Type;
 use Illuminate\Support\Facades\DB;
-use Illuminate\Validation\Rule;
 use Rebing\GraphQL\Support\Facades\GraphQL;
 
 class CancelListingMutation extends Mutation implements PlatformBlockchainTransaction
@@ -77,7 +77,7 @@ protected function rules(array $args = []): array
                 'bail',
                 'filled',
                 'max:255',
-                Rule::exists('marketplace_listings', 'listing_id'),
+                new ListingNotCancelled(),
             ],
         ];
     }

src/Rules/ListingNotCancelled.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Enjin\Platform\Marketplace\Rules;
+
+use Closure;
+use Enjin\Platform\Marketplace\Enums\ListingState;
+use Enjin\Platform\Marketplace\Models\Laravel\MarketplaceListing;
+use Illuminate\Contracts\Validation\ValidationRule;
+
+class ListingNotCancelled implements ValidationRule
+{
+    /**
+     * Run the validation rule.
+     *
+     * @param  \Closure(string): \Illuminate\Translation\PotentiallyTranslatedString  $fail
+     */
+    public function validate(string $attribute, mixed $value, Closure $fail): void
+    {
+        if (!$listing = MarketplaceListing::where('listing_id', $value)->with('state')->first()) {
+            $fail('validation.exists')->translate();
+
+            return;
+        }
+
+        if ($listing->state?->state === ListingState::CANCELLED->name) {
+            $fail('enjin-platform-marketplace::validation.listing_not_cancelled')->translate();
+        }
+    }
+}

tests/Feature/GraphQL/Mutations/CancelListingTest.php

@@ -2,6 +2,9 @@
 
 namespace Enjin\Platform\Marketplace\Tests\Feature\GraphQL\Mutations;
 
+use Enjin\Platform\Marketplace\Enums\ListingState;
+use Enjin\Platform\Marketplace\Models\MarketplaceListing;
+use Enjin\Platform\Marketplace\Models\MarketplaceState;
 use Enjin\Platform\Marketplace\Tests\Feature\GraphQL\TestCaseGraphQL;
 use Illuminate\Support\Str;
 
@@ -66,5 +69,20 @@ public function test_it_will_fail_with_invalid_parameter_listing_id(): void
             ['listingId' => ['The selected listing id is invalid.']],
             $response['error']
         );
+
+        $listing = MarketplaceListing::factory()->create(['seller_wallet_id' => $this->wallet->id]);
+        MarketplaceState::create([
+            'state' => ListingState::CANCELLED->name,
+            'marketplace_listing_id' => $listing->id,
+        ]);
+        $response = $this->graphql(
+            $this->method,
+            ['listingId' => $listing->listing_id],
+            true
+        );
+        $this->assertArraySubset(
+            ['listingId' => ['The listing is already cancelled.']],
+            $response['error']
+        );
     }
 }