feat(decorators): TelegrafSettings added

lib/decorators/telegraf-settings.decorator.ts

@@ -0,0 +1,11 @@
+import { SetMetadata } from '@nestjs/common';
+import { DECORATORS } from '../telegraf.constants';
+
+/**
+ * Handler for /settings command.
+ *
+ * https://telegraf.js.org/#/?id=settings
+ */
+export function TelegrafSettings(): MethodDecorator {
+  return SetMetadata(DECORATORS.SETTINGS, {});
+}

lib/telegraf-metadata.accessor.ts

@@ -60,4 +60,11 @@ export class TelegrafMetadataAccessor {
     }
     return !!this.reflector.get(DECORATORS.HELP, target);
   }
+
+  isTelegrafSettings(target: Type<any> | Function): boolean {
+    if (!target) {
+      return false;
+    }
+    return !!this.reflector.get(DECORATORS.SETTINGS, target);
+  }
 }

lib/telegraf.constants.ts

@@ -9,4 +9,5 @@ export const DECORATORS = {
   COMMAND: `${DECORATORS_PREFIX}/COMMAND`,
   START: `${DECORATORS_PREFIX}/START`,
   HELP: `${DECORATORS_PREFIX}/HELP`,
+  SETTINGS: `${DECORATORS_PREFIX}/SETTINGS`,
 };

lib/telegraf.explorer.ts

@@ -60,6 +60,8 @@ export class TelegrafExplorer implements OnModuleInit {
             this.handleTelegrafStart(instance, key, telegraf);
           } else if (this.metadataAccessor.isTelegrafHelp(instance[key])) {
             this.handleTelegrafHelp(instance, key, telegraf);
+          } else if (this.metadataAccessor.isTelegrafSettings(instance[key])) {
+            this.handleTelegrafSettings(instance, key, telegraf);
           }
         },
       );
@@ -116,4 +118,13 @@ export class TelegrafExplorer implements OnModuleInit {
   ) {
     telegraf.help(instance[key].bind(instance));
   }
+
+  handleTelegrafSettings(
+    instance: object,
+    key: string,
+    telegraf: Telegraf<ContextMessageUpdate>,
+  ) {
+    // @ts-ignore
+    telegraf.settings(instance[key].bind(instance));
+  }
 }