# All files / src/components CityPicker.js

88.64% Statements 78/88
73.53% Branches 25/34
90.91% Functions 20/22
91.89% Lines 68/74

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     import '../styles/icons.styl'
    import '../styles/city.styl'

    import { srcProvince, srcCity } from '../formatted'
    import selector from '../mixins/selector'
    import search from '../mixins/selectorWithSearch'
    import dropdown from 'v-dropdown'

    export default {
      name: 'CityPicker',
      mixins: [search, selector],
      inheritAttrs: false,
      components: { dropdown },
      props: {
        i18n: {
          type: String,
          default: 'cn'
        },
        value: Array
      },
      data () {
        return {
          /**
           * data list to display
           * [{
           *   province: { key: '', value: ''},
           *   citys: [
           *     {key: '', value: ''},
           *     {key: '', value: ''},
           *     ...
           *   ]
           * }]
           */
          list: [],
          // converted data list
          listBuilt: [],
          query: '',
          picked: []
        }
      },
      computed: {
        selectedText () {
          return this.picked.map(val => val.value).join(',')
        }
      },
      watch: {
        /**
         * region search
         * search region description first, if no result, then search region key
         * @param value
         */
        query (value) {
          const keyword = value.trim()
          if (keyword) {
            const list = []
            this.listBuilt.forEach(val => {
              const citys = val.citys.filter(city => new RegExp(keyword).test(city.value))
              if (citys.length) list.push({ province: val.province, citys: citys })
            })
            this.list = list
          } else {
            this.list = this.listBuilt.slice()
          }
        },
        /**
         * initialize selected citys
         */
        value: {
          handler (val) {
            Eif (Array.isArray(val)) {
              Iif (this.equal(val)) return

              Eif (val.length) {
                const provincialCity = srcProvince.filter(item => val.includes(item.key))
                // marge province and city
                this.picked = [
                  ...provincialCity,
                  ...srcCity.filter(item => val.includes(item.key))
                ]
              } else this.picked = []

              this.emit(false)
            }
          },
          immediate: true
        }
      },
      render (h) {
        const child = []

        child.push(this.buildCaller(h))

        // search bar
        child.push(h('div', { class: 'rg-search-bar' }, [
          h('input', {
            ref: 'search',
            class: 'rg-input',
            attrs: {
              type: 'text',
              autocomplete: 'off'
            },
            domProps: {
              value: this.query.trim()
            },
            on: {
              input: e => {
                this.query = e.target.value.trim()
              }
            }
          })
        ]))

        // province grouped city list
        child.push(h('div', { class: 'rg-picker' }, this.list.map(val => {
          return h('div', {
            class: 'rg-picker__row',
            key: val.province.key
          }, [
            h('dl', [
              h('dt', val.province.value),
              h('dd', [
                h('ul', val.citys.map(city => {
                  return h('li', {
                    key: city.key,
                    class: {
                      selected: this.inPicked(city)
                    },
                    on: {
                      click: () => {
                        this.pick(city)
                      }
                    }
                  }, city.value)
                }))
              ])
            ])
          ])
        })))

        return h('dropdown', {
          ref: 'drop',
          props: {
            border: false
          },
          on: {
            show: this.showChange
          }
        }, child)
      },
      methods: {
        prepared () {
          // beijing, tianjin, shanghai, chongqing
          const municipalitys = ['110000', '120000', '310000', '500000']
          const municipality = '000000'
          // hongkong, macao
          const specials = ['810000', '820000']
          const special = '000010'
          const listTmp = []
          const municipalityObj = {
            province: { key: municipality, value: '直辖市' },
            citys: []
          }
          const specialObj = {
            province: { key: special, value: '特别行政区' },
            citys: []
          }
          // set provinces
          srcProvince.forEach(val => {
            if (municipalitys.includes(val.key)) municipalityObj.citys.push(val)
            else if (specials.includes(val.key)) specialObj.citys.push(val)
            else listTmp.push({ province: val, citys: [] })
          })
          listTmp.forEach(val => {
            val.citys = srcCity.filter(value => {
              const num = Number.parseInt(val.province.key)
              return (value.key - num) < 1e4 && (value.key % num) < 1e4
            })
          })
          this.listBuilt = [...[municipalityObj], ...listTmp, ...[specialObj]]
        },
        // dropdown position adjust
        adjust () {
          this.$nextTick(() => {
            this.$refs.drop.adjust()
          })
        },
        emit (input = true) {
          if (input) this.$emit('input', this.picked.map(val => val.key))
          this.$emit('values', this.picked)
        },
        /**
         * v-model/value(keys) whether equal to picked keys
         *
         * @param {array} keys
         * @returns
         */
        equal (keys) {
          Iif (keys.length === this.picked.length) {
            if (!keys.length) return true
            this.picked.forEach(val => {
              if (!keys.includes(val.key)) return false
            })
            return true
          } else return false
        },
        clear () {
          this.picked = []
          this.close()
          this.emit()
        },
        pick (item) {
          Iif (this.inPicked(item)) {
            this.picked.splice(this.picked.findIndex(val => val.key === item.key), 1)
          } else {
            this.picked.push(item)
          }
          this.emit()
          this.adjust()
        },
        inPicked (city) {
          if (!city || !this.picked.length) return false
          return this.picked.some(val => val.key === city.key)
        }
      },
      created () {
        this.prepared()
        this.list = this.listBuilt.slice()
      }
    }