todo.controller.ts

// Copyright IBM Corp. 2018,2020. All Rights Reserved.
// Node module: @loopback/example-todo
// This file is licensed under the MIT License.
// License text available at https://opensource.org/licenses/MIT

import { inject } from '@loopback/core';
import { Filter, repository } from '@loopback/repository';
import { Server } from 'socket.io';
import { del, get, getModelSchemaRef, HttpErrors, param, patch, post, put, requestBody, } from '@loopback/rest';
import { Todo } from '../models';
import { TodoRepository } from '../repositories';
import { Geocoder } from '../services';
import { ws } from "../websockets/decorators/websocket.decorator";

export class TodoController {
  constructor(
    @repository(TodoRepository) protected todoRepository: TodoRepository,
    @inject('services.Geocoder') protected geoService: Geocoder,
  ) {
  }

  @post('/todos', {
    responses: {
      '200': {
        description: 'Todo model instance',
        content: { 'application/json': { schema: getModelSchemaRef(Todo) } },
      },
    },
  })
  async createTodo(
    @requestBody({
      content: {
        'application/json': {
          schema: getModelSchemaRef(Todo, { title: 'NewTodo', exclude: ['id'] }),
        },
      },
    })
      todo: Omit<Todo, 'id'>,
  ): Promise<Todo> {
    if (todo.remindAtAddress) {
      const geo = await this.geoService.geocode(todo.remindAtAddress);

      if (!geo[0]) {
        // address not found
        throw new HttpErrors.BadRequest(
          `Address not found: ${todo.remindAtAddress}`,
        );
      }
      // Encode the coordinates as "lat,lng" (Google Maps API format). See also
      // https://stackoverflow.com/q/7309121/69868
      // https://gis.stackexchange.com/q/7379
      todo.remindAtGeo = `${geo[0].y},${geo[0].x}`;
    }
    return this.todoRepository.create(todo);
  }

  @get('/todos/{id}', {
    responses: {
      '200': {
        description: 'Todo model instance',
        content: { 'application/json': { schema: getModelSchemaRef(Todo) } },
      },
    },
  })
  async findTodoById(
    @param.path.number('id') id: number,
    @param.query.boolean('items') items?: boolean,
  ): Promise<Todo> {
    return this.todoRepository.findById(id);
  }

  @get('/todos', {
    responses: {
      '200': {
        description: 'Array of Todo model instances',
        content: {
          'application/json': {
            schema: { type: 'array', items: getModelSchemaRef(Todo) },
          },
        },
      },
    },
  })
  async findTodos(
    @param.filter(Todo)
      filter?: Filter<Todo>,
  ): Promise<Todo[]> {
    return this.todoRepository.find(filter);
  }

  @put('/todos/{id}', {
    responses: {
      '204': {
        description: 'Todo PUT success',
      },
    },
  })
  async replaceTodo(
    @param.path.number('id') id: number,
    @requestBody() todo: Todo,
  ): Promise<void> {
    await this.todoRepository.replaceById(id, todo);
  }

  @patch('/todos/{id}', {
    responses: {
      '204': {
        description: 'Todo PATCH success',
      },
    },
  })
  async updateTodo(
    @param.path.number('id') id: number,
    @requestBody({
      content: {
        'application/json': {
          schema: getModelSchemaRef(Todo, { partial: true }),
        },
      },
    })
      todo: Partial<Todo>,
  ): Promise<void> {
    await this.todoRepository.updateById(id, todo);
  }

  @del('/todos/{id}', {
    responses: {
      '204': {
        description: 'Todo DELETE success',
      },
    },
  })
  async deleteTodo(
    @param.path.number('id') id: number
  ): Promise<void> {
    await this.todoRepository.deleteById(id);
  }

  @post('/todos/room/example/emit')
  async exampleRoomEmmit(
    @ws.namespace('chatNsp') nsp: Server
  ): Promise<any> {
    nsp.to('some room').emit('some room event', `time: ${new Date().getTime()}`);
    console.log('exampleRoomEmmit');
    return 'room event emitted';
  }
}