New mappers added: LowerCaseMapper and UpperCaseMapper

docs/as-a-resource/mapping-property-names.md

@@ -80,3 +80,36 @@ And a transformed version of the data object will look like this:
     'record_company' => 'RCA Records',
 ]
 ```
+
+### Available mappers:
+
+```php
+class ContractData extends Data
+{
+    public function __construct(
+        #[MapName(CamelCaseMapper::class)]
+        public string $name,
+        #[MapName(SnakeCaseMapper::class)]
+        public string $recordCompany,
+        #[MapName(new ProvidedNameMapper('country field'))]
+        public string $country,
+        #[MapName(StudlyCaseMapper::class)]
+        public string $cityName,
+        #[MapName(LowerCaseMapper::class)]
+        public string $addressLine1,
+        #[MapName(UpperCaseMapper::class)]
+        public string $addressLine2,
+    ) {
+    }
+}
+```
+```php
+[
+    'name' => 'Rick Astley',
+    'record_company' => 'RCA Records',
+    'country field' => 'Belgium',
+    'CityName' => 'Antwerp',
+    'addressline1' => 'some address line 1',
+    'ADDRESSLINE2' => 'some address line 2',
+]
+```

src/Mappers/LowerCaseMapper.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Spatie\LaravelData\Mappers;
+
+use Illuminate\Support\Str;
+
+class LowerCaseMapper implements NameMapper
+{
+    public function map(int|string $name): string|int
+    {
+        return Str::lower($name);
+    }
+}

src/Mappers/UpperCaseMapper.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Spatie\LaravelData\Mappers;
+
+use Illuminate\Support\Str;
+
+class UpperCaseMapper implements NameMapper
+{
+    public function map(int|string $name): string|int
+    {
+        return Str::upper($name);
+    }
+}

tests/MappingTest.php

@@ -6,9 +6,11 @@
 use Spatie\LaravelData\Attributes\MapOutputName;
 use Spatie\LaravelData\Data;
 use Spatie\LaravelData\Mappers\CamelCaseMapper;
+use Spatie\LaravelData\Mappers\LowerCaseMapper;
 use Spatie\LaravelData\Mappers\ProvidedNameMapper;
 use Spatie\LaravelData\Mappers\SnakeCaseMapper;
 use Spatie\LaravelData\Mappers\StudlyCaseMapper;
+use Spatie\LaravelData\Mappers\UpperCaseMapper;
 use Spatie\LaravelData\Support\Transformation\TransformationContextFactory;
 use Spatie\LaravelData\Tests\Fakes\DataWithMapper;
 use Spatie\LaravelData\Tests\Fakes\SimpleData;
@@ -328,6 +330,12 @@ public function __construct(
         #[MapName(StudlyCaseMapper::class)]
         public string $studly_case = 'StudlyCase';
 
+        #[MapName(LowerCaseMapper::class)]
+        public string $lowercase = 'lowercase';
+
+        #[MapName(UpperCaseMapper::class)]
+        public string $uppercase = 'UPPERCASE';
+
         #[MapName(new ProvidedNameMapper('i_provided'))]
         public string $provided = 'provided';
     };
@@ -336,17 +344,23 @@ public function __construct(
         'camelCase' => 'camelCase',
         'snake_case' => 'snake_case',
         'StudlyCase' => 'StudlyCase',
+        'lowercase' => 'lowercase',
+        'UPPERCASE' => 'UPPERCASE',
         'i_provided' => 'provided',
     ]);
 
     expect($data::from([
         'camelCase' => 'camelCase',
         'snake_case' => 'snake_case',
         'StudlyCase' => 'StudlyCase',
+        'lowercase' => 'lowercase',
+        'UPPERCASE' => 'UPPERCASE',
         'i_provided' => 'provided',
     ]))
         ->camel_case->toBe('camelCase')
         ->snakeCase->toBe('snake_case')
         ->studly_case->toBe('StudlyCase')
+        ->lowercase->toBe('lowercase')
+        ->uppercase->toBe('UPPERCASE')
         ->provided->toBe('provided');
 });