long-list-page.uvue

<template>
  <list-view class="list" ref="listView" @scrolltolower="loadData" scroll-y = true>
    <!-- TODO 暂时这样写才能保证 loading 在 list 底部 -->
    <template v-for="(item, index) in dataList" :key="index">
      <list-item class="list-item">
        <view class="list-item-icon">
          <image class="list-item-icon-image" :src="item.plugin_img_link"></image>
        </view>
        <view class="list-item-fill">
          <view class="flex-row">
            <text class="title">{{item.plugin_name}}</text>
          </view>
          <view class="description">
            <text class="description-text">{{item.plugin_intro}}</text>
          </view>
          <text class="icon-star star">{{convertToStarUnicode(item.score)}}</text>
          <view class="tag-list">
            <text class="tag-item" v-for="(item2, index2) in item.tags" :key="index2">{{item2}}</text>
          </view>
          <view class="flex-row update-date">
            <text class="update-date-text">更新日期</text>
            <text class="update-date-value">{{item.update_date}}</text>
            <text class="author">{{item.author_name}}</text>
          </view>
        </view>
      </list-item>
      <list-item key="loading" v-if="index==dataList.length-1">
        <text class="loading">{{loadingText}}</text>
      </list-item>
    </template>
  </list-view>
</template>

<script>
  const SERVER_URL = "https://ext.dcloud.net.cn/plugin/uniappx-plugin-list"
  const PAGE_SIZE = 10; // 最大值 10

  type ListItem = {
    plugin_id : number,
    plugin_img_link : string,
    plugin_name : string,
    plugin_intro : string,
    score : number,
    tags : Array<string>,
    update_date : string,
    author_name : string,
  }

  type ResponseDataType = {
    code : number,
    data : ListItem[]
  }

  export default {
    props: {
      type: {
        type: String,
        default: ''
      },
      preload: {
        type: Boolean,
        default: false
      }
    },
    data() {
      return {
        loading: false,
        dataList: [] as ListItem[],
        isEnded: false,
        loadingError: '',
        $currentPage: 0
      }
    },
    computed: {
      loadingText() : string {
        if (this.loading) {
          return "加载中..."
        } else if (this.isEnded) {
          return "没有更多了"
        } else if (this.loadingError.length > 0) {
          return this.loadingError
        } else {
          return ""
        }
      }
    },
    created() {
      uni.loadFontFace({
        global: false,
        family: 'UtsIconsFontFamily',
        source: '/static/fonts/icon-star.ttf'
      })

      if (this.preload) {
        this.loadData()
      }
    },
    methods: {
      loadData() {
        if (this.loading || this.isEnded) {
          return
        }
        this.loading = true

        // TODO request data 没有拼接到 url 中，暂时手动拼接
        uni.request({
          url: `${SERVER_URL}?type=${this.type}&page=${this.$currentPage}&page_size=${PAGE_SIZE}`,
          data: {
            type: this.type,
            page: this.$currentPage,
            page_size: PAGE_SIZE
          },
          dataType: '',
          success: (res) => {
            const responseData = JSON.parse<ResponseDataType>(res.data as string)
            if (responseData == null) {
              return
            }

            this.dataList.push(...responseData.data)

            if (responseData.data.length == 0) {
              this.isEnded = true
            } else {
              this.$currentPage++
            }
          },
          fail: (err) => {
            this.loadingError = err.errMsg
          },
          complete: () => {
            this.loading = false
          }
        })
      },
      // score 0 ~ 50
      convertToStarUnicode(score : Number) : string {
        const fill_code = '\ue879'
        const half_code = '\ue87a'
        const null_code = '\ue87b'

        const fillStarCount = parseInt(score / 10 % 10 + '')
        const halfStarCount = score % 10 >= 5 ? 1 : 0
        const nullStarCount = 5 - fillStarCount - halfStarCount

        let result = ''
        if (fillStarCount > 0) { result += fill_code.repeat(fillStarCount) }
        if (halfStarCount > 0) { result += half_code.repeat(halfStarCount) }
        if (nullStarCount > 0) { result += null_code.repeat(nullStarCount) }

        return result
      }
    }
  }
</script>

<style>
  .list {
    flex: 1;
    background-color: #ffffff;
  }

  .list-item {
    flex-direction: row;
    margin-top: 10px;
    padding: 10px;
  }

  .list-item-icon {
    position: relative;
  }

  .list-item-icon-image {
    width: 80px;
    height: 80px;
  }

  .list-item-fill {
    flex: 1;
    margin-left: 15px;
  }

  .description {
    line-height: 14px;
  }

  .description-text {
    font-size: 13px;
    color: #666;
    line-height: 19px;
  }

  .icon-star {
    font-family: "UtsIconsFontFamily";
    font-size: 16px;
    font-style: normal;
    color: #ffca3e;
    letter-spacing: 3px;
  }

  .tag-list {
    flex-direction: row;
    margin-top: 5px;
  }

  .tag-item {
    font-size: 14px;
    background-color: #EFF9F0;
    color: #639069;
    border-radius: 20px;
    margin-right: 5px;
    padding: 2px 5px;
  }

  .update-date {
    margin-top: 10px;
  }

  .update-date-text {
    font-size: 12px;
    color: #888888;
  }

  .update-date-value {
    font-size: 12px;
    color: #777777;
    margin-left: 5px;
  }

  .author {
    font-size: 12px;
    color: #008000;
    margin-left: auto;
  }

  .loading {
    padding: 20px;
    text-align: center;
    background-color: #f8f8f8;
  }
</style>