NestJS pagination Decorator

pagination.decorator.ts

import { ExecutionContext, createParamDecorator } from '@nestjs/common';
import { ApiQuery } from '@nestjs/swagger';

export interface IPagination {
  page: number;
  limit: number;
}

export interface IPaginationResponse<T> {
  items: T[];
  totalItems: number;
  currentPage: number;
  totalPages: number;
  itemsPerPage: number;
}

export const Paginate = createParamDecorator(
  (_data: unknown, context: ExecutionContext) => {
    const req = context.switchToHttp().getRequest();
    const { page, limit } = req.query;

    return {
      page: page ? Number(page) : 1,
      limit: limit ? Number(limit) : 10,
    };
  },
  [
    (target: any, key: string) => {
      ApiQuery({
        name: 'page',
        schema: { default: 1, type: 'number', minimum: 1 },
        required: false,
      })(target, key, Object.getOwnPropertyDescriptor(target, key));
      ApiQuery({
        name: 'limit',
        schema: { default: 10, type: 'number', minimum: 1 },
        required: false,
      })(target, key, Object.getOwnPropertyDescriptor(target, key));
    },
  ],
);