workbench, tests

src/Config.php

@@ -4,15 +4,60 @@ declare(strict_types=1);
 
 namespace Icefox\DTO;
 
+use Icefox\DTO\Support\RuleFactory;
+use Illuminate\Support\Collection;
+use phpDocumentor\Reflection\PseudoTypes\Generic;
+
 class Config
 {
-    public static function getCaster(string $className): ?callable
+    /**
+     * @param class-string $class
+    **/
+    public static function getCaster(string $class): ?callable
     {
-        return config('dto.cast.' . $className, null);
+        return config('dto.cast.' . $class, null);
     }
 
-    public static function getRules(string $className): ?callable
+    /**
+     * @param class-string $class
+    **/
+    public static function getRules(string $class): ?callable
     {
-        return config('dto.rules.' . $className, null);
+        if ($userDefined = config('dto.rules.' . $class, null)) {
+            return $userDefined;
+        }
+        return match ($class) {
+            Collection::class => static::rulesIlluminateCollection(...),
+            default => null,
+        };
+    }
+
+
+    /**
+     * @return array<string,string[]>
+     */
+    private static function rulesIlluminateCollection(ParameterMeta $parameter, RuleFactory $factory): array
+    {
+        if (is_null($parameter->tag)) {
+            return [];
+        }
+
+        $type = $parameter->tag->getType();
+        if (!$type instanceof Generic) {
+            return [];
+        }
+
+        $subtypes = $type->getTypes();
+
+        if (count($subtypes) == 0) {
+            return ['' => ['array']];
+        }
+
+        $subtype = count($subtypes) == 1 ? $subtypes[0] : $subtypes[1];
+
+        return $factory->mergeRules(
+            ['' => ['array']],
+            $factory->getRulesFromDocBlock($subtype, '.*'),
+        );
     }
 }