feat: add @error context annotation

src/decorators/context.ts

@@ -28,3 +28,7 @@ export function response(target: Class, propertyKey: string, parameterIndex: num
 }
 
 export const res = response
+
+export function error(target: Class, propertyKey: string, parameterIndex: number): void {
+  Reflect.defineMetadata(REFLECT_METADATA.CONTEXT_ERROR, parameterIndex, target, propertyKey)
+}

src/dependencies/Injector.ts

@@ -18,6 +18,7 @@ import { BodyContextAction } from './InjectorAction/BodyContextAction'
 import type { Class } from 'type-fest'
 import type { Context } from '../http/Context'
 import { CookieContextAction } from './InjectorAction/CookieContextAction'
+import { ErrorContextAction } from './InjectorAction/ErrorContextAction'
 import type { ModuleContext } from './ModuleContext'
 import { QueryContextAction } from './InjectorAction/QueryContextAction'
 import { RequestContextAction } from './InjectorAction/RequestContextAction'
@@ -59,6 +60,7 @@ export class Injector {
       new CookieContextAction(this, context),
       new RequestContextAction(this, context),
       new ResponseContextAction(this, context),
+      new ErrorContextAction(this, context),
     ]
     let params: InjectorFunctionParameter[] = []
 

src/dependencies/InjectorAction/ErrorContextAction.ts

@@ -0,0 +1,29 @@
+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 ErrorContextAction 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_ERROR, instance, method)) {
+      return
+    }
+
+    const metadata = Reflect.getMetadata(REFLECT_METADATA.CONTEXT_ERROR, instance, method) as number
+
+    return {
+      index: metadata,
+      value: this.context.error,
+    }
+  }
+}

src/types/enums.ts

@@ -32,6 +32,7 @@ export enum REFLECT_METADATA {
   AUTH_PROVIDER = 'authProvider',
   CONTEXT_BODY = 'contextBody',
   CONTEXT_COOKIE = 'contextCookie',
+  CONTEXT_ERROR = 'contextError',
   CONTEXT_QUERY = 'contextQuery',
   CONTEXT_PARAMS = 'contextParams',
   CONTEXT_REQUEST = 'contextRequest',