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139 lines
4.5 KiB
139 lines
4.5 KiB
<template>
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<!-- 聊天虚拟列表 -->
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<z-paging
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ref="pagingRef"
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v-model="messageList"
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use-chat-record-mode
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use-virtual-list
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cell-height-mode="dynamic"
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default-page-size="20"
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:auto-clean-list-when-reload="false"
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safe-area-inset-bottom
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bottom-bg-color="#f8f8f8"
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:back-to-top-style="backToTopStyle"
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:auto-show-back-to-top="showNewMessageTip"
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@backToTopClick="onBackToTopClick"
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@scrolltoupper="onScrollToUpper"
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@query="queryList"
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>
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<template #top>
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<!-- 撑一下顶部导航 -->
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<view :style="{ height: sys_navBar + 'px' }"></view>
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</template>
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<!-- style="transform: scaleY(-1)"必须写，否则会导致列表倒置！！！ -->
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<!-- 注意不要直接在chat-item组件标签上设置style，因为在微信小程序中是无效的，请包一层view -->
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<template #cell="{ item, index }">
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<view style="transform: scaleY(-1)">
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<!-- 消息渲染 -->
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<MessageListItem
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:message="item"
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:message-index="index"
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:message-list="messageList"
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></MessageListItem>
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</view>
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</template>
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<!-- 底部聊天输入框 -->
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<template #bottom>
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<slot name="bottom"></slot>
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</template>
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<!-- 查看最新消息 -->
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<template #backToTop>
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<text>有新消息</text>
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</template>
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</z-paging>
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</template>
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<script setup>
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import MessageListItem from '@/pages/chat/components/messageListItem.vue';
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import { reactive, ref } from 'vue';
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import KeFuApi from '@/sheep/api/promotion/kefu';
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import { isEmpty } from '@/sheep/helper/utils';
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import sheep from '@/sheep';
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import { formatDate } from '@/sheep/util';
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const sys_navBar = sheep.$platform.navbar;
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const messageList = ref([]); // 消息列表
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const showNewMessageTip = ref(false); // 显示有新消息提示
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const refreshMessage = ref(false); // 更新消息列表
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const backToTopStyle = reactive({
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width: '100px',
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'background-color': '#fff',
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'border-radius': '30px',
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'box-shadow': '0 2px 4px rgba(0, 0, 0, 0.1)',
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display: 'flex',
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justifyContent: 'center',
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alignItems: 'center',
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}); // 返回顶部样式
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const queryParams = reactive({
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no: 1, // 查询次数，只用于触底计算
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limit: 20,
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createTime: undefined,
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});
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const pagingRef = ref(null); // 虚拟列表
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const queryList = async (no, limit) => {
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// 组件加载时会自动触发此方法，因此默认页面加载时会自动触发，无需手动调用
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queryParams.no = no;
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queryParams.limit = limit;
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await getMessageList();
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};
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// 获得消息分页列表
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const getMessageList = async () => {
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const { data } = await KeFuApi.getKefuMessageList(queryParams);
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if (isEmpty(data)) {
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pagingRef.value.completeByNoMore([], true);
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return;
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}
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if (queryParams.no > 1 && refreshMessage.value) {
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const newMessageList = [];
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for (const message of data) {
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if (messageList.value.some((val) => val.id === message.id)) {
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continue;
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}
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newMessageList.push(message);
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}
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// 新消息追加到开头
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messageList.value = [...newMessageList, ...messageList.value];
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pagingRef.value.updateCache(); // 更新缓存
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refreshMessage.value = false; // 更新好后重置状态
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return;
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}
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if (data.slice(-1).length > 0) {
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// 设置最后一次历史查询的最后一条消息的 createTime
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queryParams.createTime = formatDate(data.slice(-1)[0].createTime);
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}
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pagingRef.value.completeByNoMore(data, false);
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};
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/** 刷新消息列表 */
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const refreshMessageList = async (message = undefined) => {
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if (typeof message !== 'undefined') {
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// 追加数据
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pagingRef.value.addChatRecordData([message], false);
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} else {
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queryParams.createTime = undefined;
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refreshMessage.value = true;
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await getMessageList();
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}
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// 若已是第一页则不做处理
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if (queryParams.no > 1) {
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showNewMessageTip.value = true;
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} else {
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onScrollToUpper();
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}
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};
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/** 滚动到最新消息 */
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const onBackToTopClick = (event) => {
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event(false); // 禁用默认操作
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pagingRef.value.scrollToBottom();
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};
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/** 监听滚动到底部事件（因为 scroll 翻转了顶就是底） */
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const onScrollToUpper = () => {
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// 若已是第一页则不做处理
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if (queryParams.no === 1) {
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return;
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}
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showNewMessageTip.value = false;
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};
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defineExpose({ getMessageList, refreshMessageList });
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</script>
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