feat!(): add custom execution context

sample/common/decorators/from.decorator.ts

@@ -0,0 +1,7 @@
+import { createParamDecorator, ExecutionContext } from '@nestjs/common';
+import { TelegrafExecutionContext } from '../../../lib/execution-context';
+
+export const From = createParamDecorator(
+  (_, ctx: ExecutionContext) =>
+    TelegrafExecutionContext.create(ctx).getContext().from,
+);

sample/common/filters/telegraf-exception.filter.ts

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+import { ArgumentsHost, Catch, ExceptionFilter } from '@nestjs/common';
+import { TelegrafArgumentsHost, TelegrafException } from '../../../lib';
+
+@Catch()
+export class TelegrafExceptionFilter<T> implements ExceptionFilter {
+  catch(exception: T, host: ArgumentsHost) {
+    const tgHost = TelegrafArgumentsHost.create(host);
+    console.log(tgHost);
+    return exception;
+  }
+}

sample/common/guards/admin.guard.ts

@@ -0,0 +1,21 @@
+import { CanActivate, ExecutionContext, Injectable } from '@nestjs/common';
+import { TelegrafExecutionContext } from '../../../lib/execution-context/telegraf-execution-context';
+import { Context } from '../../interfaces/context.interface';
+import { TelegrafException } from '../../../lib/errors';
+
+@Injectable()
+export class AdminGuard implements CanActivate {
+  private readonly ADMIN_IDS = [];
+
+  canActivate(context: ExecutionContext): boolean {
+    const ctx = TelegrafExecutionContext.create(context);
+    const { from } = ctx.getContext<Context>();
+
+    const isAdmin = this.ADMIN_IDS.includes(from.id);
+    if (!isAdmin) {
+      throw new TelegrafException('You are not admin >:(');
+    }
+
+    return true;
+  }
+}

sample/common/interceptors/response-time.interceptor.ts

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+import {
+  CallHandler,
+  ExecutionContext,
+  Injectable,
+  NestInterceptor,
+} from '@nestjs/common';
+import { Observable } from 'rxjs';
+import { tap } from 'rxjs/operators';
+
+@Injectable()
+export class ResponseTimeInterceptor implements NestInterceptor {
+  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
+    console.log('Before...');
+
+    const start = Date.now();
+    return next
+      .handle()
+      .pipe(tap(() => console.log(`Response time: ${Date.now() - start}ms`)));
+  }
+}

sample/common/middleware/session.middleware.ts

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+import { session } from 'telegraf';
+
+export const sessionMiddleware = session();

sample/common/pipes/reverse-text.pipe.ts

@@ -0,0 +1,8 @@
+import { Injectable, PipeTransform } from '@nestjs/common';
+
+@Injectable()
+export class ReverseTextPipe implements PipeTransform {
+  transform(value: string): string {
+    return value.split('').reverse().join('');
+  }
+}