利用微搭搭建答题小程序

const Joi = require('joi');
const { LcapContainer } = require('@cloudbase/lcap-business-sdk');
const DEFAULT_COVER_URL = 'https://tva1.sinaimg.cn/large/008i3skNgy1gs8bk2v5wdj305k05kweb.jpg';


/**
 * 数据源方法主体逻辑
 */
async function main(params, context) {
  const { services } = new LcapContainer({
    lcDatasourceCtx: context,
  });
  const { tcbService: { db }, utilService } = services;

  const schema = Joi.object({
    name: Joi.string()
      .min(1)
      .max(200)
      .required(),
    // 1: 顺序出题；2：随机出题
    type: Joi.number()
      .valid(1, 2)
      .required(),
    cover: Joi.string()
      .valid()
      .default(DEFAULT_COVER_URL),
    description: Joi.string()
      .allow('', null)
      .default(''),
    libraryId: Joi.string()
      .valid()
      .required(),
    total: Joi.number()
      .min(1)
      .max(200)
      .integer()
      .required(),
    difficultyLevel: Joi.number()
      .min(1)
      .max(5)
      .integer()
      .required(),
  });

  const validParams = utilService.checkParams(params || {}, schema);
  validParams.createTime = utilService.getLocalDayjs().valueOf();
  validParams.updateTime = validParams.createTime;
  validParams.shareInfo = {
    enable: false,
    updateTime: validParams.createTime,
    shortId: '',
    qrcodeUrl: '',
  };

  // 检查：题库是否存在
  const libCol = db.collection('lcap-business-edu-question-lib');
  const libRes = await libCol.doc(validParams.libraryId).get();
  if (!(Array.isArray(libRes.data) && libRes.data.length > 0)) {
    throw new Error('题库不存在，请重新选择');
  }
  const libraryInfo = libRes.data[0];

  // 检查：题库中是否有这么多题目
  const questionCol = db.collection('lcap-business-edu-questions');
  const { total: libQuestionTotal } = await questionCol.where({ libraryId: validParams.libraryId }).count();
  if (libQuestionTotal < validParams.total) {
    throw new Error(`题库中共 ${libQuestionTotal} 道题目，题目数量不足`);
  }

  // 创建练习
  const practiceCol = db.collection('lcap-business-edu-practice');
  const { id } = await practiceCol.add(validParams);
  if (!id) {
    throw new Error('创建失败');
  }
  return {
    _id: id,
    libraryInfo,
    ...validParams,
  };
};

/**
 * 本地测试逻辑
 */
if ((new LcapContainer()).services.configService.isLocalDev()) {
  main({
    name: 'yuanxin-0720-测试练习册',
    type: 1, // 顺序出题
    libraryId: 'b00064a760e65f9825cf43203c0422ac',
    total: 12,
    difficultyLevel: 1,
  }).then((res) => {
    console.log('>>> res is', res);
  });
}
module.exports = main;