feat!(): add custom execution context

lib/utils/param-decorator.util.ts

@@ -0,0 +1,39 @@
+import { assignMetadata, PipeTransform, Type } from '@nestjs/common';
+import { TelegrafParamtype } from '../enums/telegraf-paramtype.enum';
+import { LISTENER_ARGS_METADATA } from '../telegraf.constants';
+
+export function createTelegrafParamDecorator(
+  paramtype: TelegrafParamtype,
+): (...pipes: (Type<PipeTransform> | PipeTransform)[]) => ParameterDecorator {
+  return (...pipes: (Type<PipeTransform> | PipeTransform)[]) => (
+    target,
+    key,
+    index,
+  ) => {
+    const args =
+      Reflect.getMetadata(LISTENER_ARGS_METADATA, target.constructor, key) ||
+      {};
+    Reflect.defineMetadata(
+      LISTENER_ARGS_METADATA,
+      assignMetadata(args, paramtype, index, undefined, ...pipes),
+      target.constructor,
+      key,
+    );
+  };
+}
+
+export const createPipesTelegrafParamDecorator = (
+  paramtype: TelegrafParamtype,
+) => (
+  ...pipes: (Type<PipeTransform> | PipeTransform)[]
+): ParameterDecorator => (target, key, index) => {
+  const args =
+    Reflect.getMetadata(LISTENER_ARGS_METADATA, target.constructor, key) || {};
+
+  Reflect.defineMetadata(
+    LISTENER_ARGS_METADATA,
+    assignMetadata(args, paramtype, index, undefined, ...pipes),
+    target.constructor,
+    key,
+  );
+};