qianmu_ticket/miniprogram/js/Malls.js

import {
  getCities
} from './cities'
export default class Malls {
  constructor() {
    this.currentMall = null
    this.malls = []
  }
  async init() {
    const cities = await getCities()
    this.malls = cities.map(({
      name: city,
      malls
    }) => malls.map(({
      name,
      code
    }) => ({
      name,
      code,
      city
    }))).reduce((acc, nxt) => acc.concat(nxt), [])

    this.currentMall = this.malls[0]
  }
  async getCurrentMall() {
    if (!this.malls.length || !this.currentMall)
      await this.init()
    return this.currentMall
  }
  async getMallByCode(code) {
    if (!this.malls.length || !this.currentMall)
      await this.init()
    this.currentMall = this.malls.find((mall) => mall.code === code)
    return this.currentMall
  }
  setCurrentMall(mall) {
    this.currentMall = mall
  }
}