feat: add @response and @res context annotation

src/decorators/context.ts

@@ -22,3 +22,9 @@ export function request(target: Class, propertyKey: string, parameterIndex: numb
 }
 
 export const req = request
+
+export function response(target: Class, propertyKey: string, parameterIndex: number): void {
+  Reflect.defineMetadata(REFLECT_METADATA.CONTEXT_RESPONSE, parameterIndex, target, propertyKey)
+}
+
+export const res = response

src/dependencies/Injector.ts

@@ -21,6 +21,7 @@ import { CookieContextAction } from './InjectorAction/CookieContextAction'
 import type { ModuleContext } from './ModuleContext'
 import { QueryContextAction } from './InjectorAction/QueryContextAction'
 import { RequestContextAction } from './InjectorAction/RequestContextAction'
+import { ResponseContextAction } from './InjectorAction/ResponseContextAction'
 import type { Session } from '../security/Session'
 
 export class Injector {
@@ -57,6 +58,7 @@ export class Injector {
       new QueryContextAction(this, context),
       new CookieContextAction(this, context),
       new RequestContextAction(this, context),
+      new ResponseContextAction(this, context),
     ]
     let params: InjectorFunctionParameter[] = []
 

src/dependencies/InjectorAction/ResponseContextAction.ts

@@ -0,0 +1,33 @@
+import type { GenericControllerInstance, InjectorFunctionParameter } from '../../types/interfaces'
+
+import { AbstractAction } from './AbstractAction'
+import type { Context } from '../../http/Context'
+import type { Injector } from '../Injector'
+import { REFLECT_METADATA } from '../../types'
+
+export class ResponseContextAction extends AbstractAction {
+  protected readonly context: Context
+
+  constructor(injector: Injector, context: Context) {
+    super(injector)
+
+    this.context = context
+  }
+
+  public run(instance: GenericControllerInstance, method: string): InjectorFunctionParameter {
+    if (!Reflect.hasMetadata(REFLECT_METADATA.CONTEXT_RESPONSE, instance, method)) {
+      return
+    }
+
+    const metadata = Reflect.getMetadata(
+      REFLECT_METADATA.CONTEXT_RESPONSE,
+      instance,
+      method,
+    ) as number
+
+    return {
+      index: metadata,
+      value: this.context.response,
+    }
+  }
+}

src/types/enums.ts

@@ -35,6 +35,7 @@ export enum REFLECT_METADATA {
   CONTEXT_QUERY = 'contextQuery',
   CONTEXT_PARAMS = 'contextParams',
   CONTEXT_REQUEST = 'contextRequest',
+  CONTEXT_RESPONSE = 'contextResponse',
   CONTROLLER_KEY = 'controllerKey',
   DATABASE_CONNECTION = 'database:connection',
   DATABASE_EM = 'database:em',