feat: add cookie value decorator

Co-authored-by: imdudu1 <cd80@kakao.com>

Author: jbl428

README.md

@@ -95,6 +95,10 @@ export class AppModule {
 - `@RequestHeader(key?: string, defaultValue?: string)`: Specifies the request header, requiring the key of the header
   optionally.
 
+- `@Bearer()`: Specifies the bearer token using the `Authorization` header.
+
+- `@Cookie(key: string)`: Specifies the cookie using the `Cookie` header, requiring the key of the cookie.
+
 - `@RequestBody(key?: string, defalutValue?: unkown)`: Specifies the request body using `application/json` as the
   content type, requiring the key of the body optionally.
 

lib/decorators/utils/cookie-value.decorator.spec.ts

@@ -0,0 +1,27 @@
+import { describe, expect, test } from 'vitest';
+import { CookieValue } from './cookie-value.decorator';
+import { type RequestHeaderBuilder } from '../../builders/request-header.builder';
+import { REQUEST_HEADER_METADATA } from '../constants';
+
+describe('CookieValue', () => {
+  test('should set request header metadata with key', () => {
+    // given
+    class TestService {
+      request(@CookieValue('foo') bar: string): string {
+        return bar;
+      }
+    }
+
+    // when
+    const result: RequestHeaderBuilder = Reflect.getMetadata(
+      REQUEST_HEADER_METADATA,
+      TestService.prototype,
+      'request',
+    );
+
+    // then
+    expect(result.metadata).toHaveLength(1);
+    expect(result.metadata[0].key).toBe('Cookie');
+    expect(result.metadata[0].transform?.('bar')).toBe('foo=bar');
+  });
+});

lib/decorators/utils/cookie-value.decorator.ts

@@ -0,0 +1,7 @@
+import { RequestHeader } from '../request-header.decorator';
+
+export function CookieValue(key: string): ParameterDecorator {
+  return RequestHeader('Cookie', {
+    transform: (value) => `${key}=${value}`,
+  });
+}

lib/decorators/utils/index.ts

@@ -1 +1,2 @@
 export * from './bearer.decorator';
+export * from './cookie-value.decorator';