doT.js模版中添加方法 {{=function(value.xxx)}}

本文介绍了一种简单的方法来过滤字符串中的NULL值,并提供了一个实用的JavaScript函数实现。该函数能够有效地将NULL字符串替换为空字符串,确保数据处理过程的顺利进行。

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{{? it && it.length>0}}
    {{~ it:value:index}} //index——索引
        <div>{{= filterFunc(value.xxx)}}</div>
    {{~}}
{{?}}


function fiterFunc(val){
    return val=="NULL"?"":val;
}

过滤掉NULL字符串

转载于:https://my.oschina.net/OriginLeon/blog/768396

<script setup lang="ts"> import { nextTick, ref } from 'vue'; // @ts-ignore - These variables are used in the template import { marked as originalMarked } from 'marked'; // @ts-ignore - These variables are used in the template import hljs from 'highlight.js'; import 'highlight.js/styles/github.css'; import { useMessage, useToast } from 'wot-design-uni'; import send from '/static/icons/send.svg'; import { onLoad } from '@dcloudio/uni-app'; // 添加页面生命周期钩子 // @ts-ignore - These variables are used in the template import { getModellist } from '@/api/user.js'; const marked: any = originalMarked; const inputBottom = ref('15rpx'); // 输入框底部间距 const keyboardHeight = ref(0); // 键盘高度 const message = useMessage(); const toast = useToast(); const picker = ref<any>(null); // 添加选择器引用 // 监听键盘高度变化 uni.onKeyboardHeightChange((res) => { keyboardHeight.value = res.height; // 转换为px单位(小程序环境使用px) inputBottom.value = `${res.height}px`; }); // 在组件卸载时取消监听 onUnmounted(() => { uni.offKeyboardHeightChange(); }); // 配置marked选项 marked.setOptions({ highlight: (code: string, lang: string) => { if (lang && hljs.getLanguage(lang)) { try { return hljs.highlight(code, { language: lang }).value; } catch (err) { console.warn('代码高亮失败:', err); return code; } } return code; }, gfm: true, breaks: true, headerIds: false, mangle: false }); function renderMarkdown(content: string) { try { // 在小程序中,我们需要确保返回的是字符串 const html = marked(content); // 处理代码块的样式类,确保返回字符串 return String(html).replace(/<pre><code/g, '<pre><code class="hljs"'); } catch (err) { console.error('Markdown渲染失败:', err); return content; } } interface Message { role: 'user' | 'assistant'; content: string; typing?: boolean; } const messages = ref<Message[]>([ { role: 'assistant', content: '你好,我是你的智能助手。有什么问题我可以帮你解答吗?' } ]); const inputMessage = ref(''); const loading = ref(false); const scrollTop = ref(0); const messageListRef = ref<HTMLElement | null>(null); // 防抖函数 function debounce(fn: Function, delay: number) { let timer: number | null = null; return function (this: any, ...args: any[]) { if (timer) clearTimeout(timer); timer = setTimeout(() => { fn.apply(this, args); }, delay); }; } // 节流函数 function throttle(fn: Function, delay: number) { let lastTime = 0; let timer: number | null = null; return function (this: any, ...args: any[]) { const now = Date.now(); const remaining = delay - (now - lastTime); if (remaining <= 0) { if (timer) { clearTimeout(timer); timer = null; } fn.apply(this, args); lastTime = now; } else if (!timer) { timer = setTimeout(() => { fn.apply(this, args); lastTime = Date.now(); timer = null; }, remaining); } }; } // 滚动到底部的函数 const scrollToBottom = throttle(async () => { if (!messageListRef.value) return; const lastMessage = messages.value[messages.value.length - 1]; if (lastMessage?.typing) return; // 打字过程中不触发滚动 await nextTick(); const query = uni.createSelectorQuery(); query .select('.message-list') .boundingClientRect((data: any) => { if (data) { scrollTop.value = data.height; } }) .exec(); }, 200); // 增加节流时间,减少滚动更新频率 // 监听消息列表变化,自动滚动到底部 watch( () => messages.value.length, () => { if (messages.value[messages.value.length - 1]?.typing) return; scrollToBottom(); } ); // 监听最后一条消息的内容变化(用于打字效果) watch( () => messages.value[messages.value.length - 1]?.content, async () => { const lastMessage = messages.value[messages.value.length - 1]; if (lastMessage?.typing) { // 在打字过程中,每次内容变化都尝试滚动 await nextTick(); const query = uni.createSelectorQuery(); query .select('.message-list') .boundingClientRect((data: any) => { if (data && data.height > scrollTop.value) { scrollTop.value = data.height; } }) .exec(); } } ); // 模拟打字效果的函数 async function typeMessage(fullContent: string) { try { // 获取最后一条消息的引用 const lastMessage = messages.value[messages.value.length - 1]; // 初始化内容并标记为正在输入 lastMessage.content = ''; lastMessage.typing = true; // 确保滚动到底部 await nextTick(); await scrollToBottom(); // 逐步更新内容 const chars = Array.from(fullContent); let currentContent = ''; const batchSize = 1; for (let i = 0; i < chars.length; i += batchSize) { currentContent += chars.slice(i, i + batchSize).join(''); lastMessage.content = currentContent; // 直接更新最后一条消息 await new Promise((resolve) => setTimeout(resolve, 10)); await scrollToBottom(); } // 最终状态更新 lastMessage.content = fullContent; lastMessage.typing = false; await nextTick(); await scrollToBottom(); } catch (error) { console.error('打字效果执行失败:', error); const lastMessage = messages.value[messages.value.length - 1]; lastMessage.content = fullContent; lastMessage.typing = false; await scrollToBottom(); } } async function sendMessage() { if (!inputMessage.value.trim()) return; const userContent = inputMessage.value; // 添加用户消息 messages.value.push({ role: 'user', content: userContent }); // 清空输入框 inputMessage.value = ''; loading.value = true; try { // 创建初始的助手消息 const assistantMessage: Message = { role: 'assistant', content: '', typing: true }; messages.value.push(assistantMessage); await nextTick(); const token = uni.getStorageSync('token'); // 发送请求 const { data } = await uni.request({ url: 'https://qa.mini.xmaas.cn/chat/completions', method: 'POST', header: { logic: 'check', Authorization: `${token}`, 'Content-Type': 'application/json' }, data: { position: 0, model: pickerValue.value, stream: true, messages: [{ role: 'user', content: userContent }] } }); // 处理流式数据 const streamData = data as string; const chunks = streamData .split('\n\n') // 分割事件 .filter((chunk) => chunk.trim().startsWith('data:')); // 过滤有效数据 let fullContent = ''; for (const chunk of chunks) { try { const jsonStr = chunk.replace(/^data:/, '').trim(); if (!jsonStr) continue; const eventData = JSON.parse(jsonStr); const contentChunk = eventData.choices[0]?.delta?.content || ''; // 处理Unicode转义字符 const decodedContent = unescape(contentChunk.replace(/\\u/g, '%u')); fullContent += decodedContent; } catch (err) { console.error('解析数据块失败:', err); } } // 更新最后一条消息内容,并触发打字效果 messages.value[messages.value.length - 1].content = fullContent; await typeMessage(fullContent); // 使用逐字打印效果 // 结束打字状态 messages.value[messages.value.length - 1].typing = false; } catch (error) { console.error('请求失败:', error); messages.value[messages.value.length - 1].content = '回答生成失败,请稍后重试'; } finally { loading.value = false; await scrollToBottom(); } } function loadMoreMessages() { // TODO: 实现加载更多历史消息 console.log('加载更多消息'); } // ... existing code ... function handleBack() { uni.navigateBack({ delta: 1, fail: () => { // 如果返回失败(比如没有上一页),则跳转到首页 uni.switchTab({ url: '/pages/index' }); } }); } //清空对话 // 修改 handClear 函数 async function handClear() { const token = uni.getStorageSync('token'); try { // 1. 调用清空接口 await uni.request({ url: 'https://qa.mini.xmaas.cn/message/deleteByChatId', method: 'DELETE', header: { 'Content-Type': 'application/json', Authorization: `${token}` } }); // 2. 重置本地消息状态为初始欢迎消息 messages.value = [ { role: 'assistant', content: '你好,我是你的智能助手。有什么问题我可以帮你解答吗?' } ]; // 3. 重置滚动位置到顶部 scrollTop.value = 0; // 4. 显示成功提示(已经在 beforeConfirm 中处理) } catch (error) { console.error('清空消息失败:', error); toast.error('清空消息失败'); } } function beforeConfirm() { message .confirm({ msg: '是否删除', title: '提示', beforeConfirm: ({ resolve }) => { toast.loading('删除中...'); setTimeout(() => { toast.close(); handClear(); resolve(true); toast.success('删除成功'); }, 2000); } }) .then(() => {}) .catch((error) => { console.log(error); }); } const columns = ref<Record<string, any>>([]); const pickerValue = ref<string>(''); // 添加获取模型列表的函数 async function fetchModelList() { try { const data = await getModellist(); if (data && data.models && data.models.length > 0) { // 将接口数据映射为选择器需要的格式 columns.value = data.models.map((model: any) => ({ value: model.name, label: model.name })); // 设置默认选中第一个模型 if (columns.value.length > 0) { pickerValue.value = columns.value[0].value; } } } catch (error) {} } function handleChange({ value }: any) { pickerValue.value = value; } // 添加按钮点击处理函数 function handleButtonClick() { picker.value?.open(); } function pauseLoading() { console.log(22222222222); } // 添加历史消息获取函数 async function fetchHistoryMessages() { const token = uni.getStorageSync('token'); try { loading.value = true; const { data }: any = await uni.request({ url: 'https://qa.mini.xmaas.cn/message/findByChatId', method: 'GET', header: { 'Content-Type': 'application/json', Authorization: `${token}` } }); // 处理接口返回的数据 if (data && data.messages && data.messages.length > 0) { // 按时间排序(确保消息顺序正确) const sortedMessages = data.messages.sort((a: any, b: any) => a.created_time - b.created_time); messages.value = []; // 转换为需要的格式 sortedMessages.forEach((msg: any) => { messages.value.push({ role: msg.model_id === 0 ? 'user' : 'assistant', content: msg.content, typing: false // 历史消息不需要打字效果 }); }); // 滚动到底部 await nextTick(); scrollToBottom(); } else { // 没有历史消息时显示欢迎语 setWelcomeMessage(); } } catch (error) { console.error('获取历史消息失败:', error); toast.error('加载历史消息失败'); // 请求失败时也显示欢迎语 setWelcomeMessage(); } finally { loading.value = false; } } function setWelcomeMessage() { messages.value = [ { role: 'assistant', content: '你好,我是你的智能助手。有什么问题我可以帮你解答吗?' } ]; } // 在页面加载时获取历史消息 onLoad(() => { fetchHistoryMessages(); fetchModelList(); }); //长按复制 function handleCopy(e: any) { // 确保是复制操作 if (e.detail.action === 'copy') { // 获取消息内容 const content = e.currentTarget.dataset.content; // 复制到剪贴板 uni.setClipboardData({ data: content, success: () => { // 使用您现有的 toast 组件 toast.success('复制成功'); }, fail: () => { toast.error('复制失败'); } }); } } // +++ 添加长按事件处理 +++ function handleLongPress(e: any, content: string) { console.log('长按事件触发', content); } </script> <template> <view class="chat-container"> <wd-navbar safe-area-inset-top placeholder left-arrow fixed :bordered="false" @click-left="handleBack"> <template #right> <view class="custom-right"> <wd-icon name="clear" size="22px" @click="beforeConfirm" /> </view> </template> </wd-navbar> <scroll-view ref="messageListRef" scroll-y class="chat-messages" :scroll-top="scrollTop" :scroll-with-animation="false" :scroll-anchoring="true" :enhanced="true" :bounces="false" @scrolltoupper="loadMoreMessages" > <view class="message-list"> <view v-for="(message, index) in messages" :key="index" class="message-item" :class="[message.role, { typing: message.typing }]" > <view v-if="message.role === 'assistant'" class="message-avatar"> <image src="/static/svg/Hara.svg" mode="aspectFill" style="width: 44rpx; height: 44rpx" /> <text>Hara</text> </view> <view class="message-content"> <!-- 统一使用rich-text渲染Markdown --> <view v-if="!message.typing" @longpress="(e) => handleLongPress(e, message.content)" > <rich-text :nodes="renderMarkdown(message.content)" :data-content="message.content" /> </view> <rich-text v-else :nodes="renderMarkdown(message.content)" /> <view v-if="message.typing" class="typing-indicator"> <view class="dot" /> <view class="dot" /> <view class="dot" /> </view> </view> </view> </view> </scroll-view> <wd-select-picker ref="picker" v-model="pickerValue" :columns="columns" @change="handleChange" custom-class="hidden-picker" custom-style="z-index:120" type="radio" :show-confirm="false" ></wd-select-picker> <view class="button_picker" style="margin-bottom: 45rpx; margin-left: 25rpx"> <wd-button type="success" @click="handleButtonClick" custom-class="handbtn"> <text style="font-family: PingFang SC">{{ pickerValue }}</text> <wd-icon name="arrow-down" size="16px" custom-style="transform: translateY(3rpx)"></wd-icon> </wd-button> </view> <view class="chat-input safe-area-bottom" :style="{ bottom: inputBottom }"> <input v-model="inputMessage" type="text" placeholder="向你的专属知识库提问吧~" :rows="2" class="message-textarea" :disabled="loading" :adjust-position="false" @keypress.enter.prevent="sendMessage" /> <!-- <wd-button type="primary" size="small" :loading="loading" :disabled="!inputMessage.trim()" @click="sendMessage"> 发送 </wd-button> --> <image :src="loading ? '/static/icons/Pause.svg' : !inputMessage.trim() ? '/static/icons/ic_send.svg' : '/static/icons/arrow.svg'" @click="loading ? pauseLoading() : inputMessage.trim() ? sendMessage() : null" style="width: 56rpx; height: 56rpx" /> </view> </view> </template> <style lang="scss" scoped> :deep(.handbtn) { background-color: #d8f2f3 !important; color: #14c3c9 !important; width: auto !important; border-radius: 16rpx !important; font-family: 'PingFang SC'; display: flex; align-items: center; } .button_picker { margin-bottom: 90rpx; margin-left: 80rpx; } /* 隐藏原生选择器控件 */ :deep(.hidden-picker) { .wd-select-picker__field { display: none !important; } .data-v-d4a8410a.wd-icon.wd-icon-check { color: #14c3c9 !important; } .data-v-aa3a6253.wd-button.is-primary.is-large.is-round.is-block { background-color: #7f6ce0 !important; } } .custom-right { display: flex; align-items: center; /* 垂直居中 */ gap: 10rpx; /* 元素间距 */ padding-right: 160rpx; /* 右侧距离 */ margin-right: 20rpx; } :deep(.wd-navbar) { background-color: #f4f4f5 !important; // 添加背景色 } :deep(.wd-navbar__title) { color: #000000 !important; } :deep(.wd-icon-arrow-left) { color: #000000 !important; } .chat-container { display: flex; flex-direction: column; height: 100vh; background-color: #f4f4f5; position: relative; } .chat-messages { flex: 0.9; box-sizing: border-box; padding: 20rpx 0 20rpx 20rpx; overflow-y: auto; -webkit-overflow-scrolling: touch; } .message-list { padding-bottom: 20rpx; } .message-item { display: flex; flex-direction: column; margin-bottom: 48rpx; opacity: 1; transform: translateY(0); transition: opacity 0.3s, transform 0.3s; // padding: 0 20rpx; &.typing { .message-content { min-width: 120rpx; } } &.user { flex-direction: row-reverse; .message-content { background-color: #272727; border-radius: 24rpx 24rpx 24rpx 24rpx; padding: 20rpx; color: #fff; box-shadow: 0 2rpx 12rpx rgba(0, 0, 0, 0.1); max-width: 80%; :deep(pre), :deep(code) { background-color: rgba(255, 255, 255, 0.1); color: #fff; } } } &.assistant .message-content { max-width: 100%; // background-color: #fff; padding: 0 !important; // border-radius: 4rpx 20rpx 20rpx 20rpx; } } .message-avatar { width: 140rpx; flex-shrink: 0; margin: 0; display: flex; align-items: center; image { width: 100%; height: 100%; border-radius: 50%; } text { margin-left: 8rpx; color: 737373; font-weight: 400; font-size: 28rpx; } } .message-content { // max-width: 80%; margin: 0 20rpx; font-size: 28rpx; word-break: break-word; overflow-wrap: break-word; :deep(pre) { background-color: #f6f8fa; padding: 16rpx; border-radius: 6rpx; overflow-x: auto; margin: 16rpx 0; white-space: pre-wrap; word-wrap: break-word; } :deep(code) { font-family: Consolas, Monaco, 'Andale Mono', monospace; font-size: 24rpx; padding: 4rpx 8rpx; background-color: #f6f8fa; border-radius: 4rpx; white-space: pre-wrap; word-wrap: break-word; } :deep(p) { margin: 16rpx 0; } :deep(ul), :deep(ol) { padding-left: 32rpx; margin: 16rpx 0; } :deep(table) { border-collapse: collapse; margin: 16rpx 0; width: 100%; } :deep(th), :deep(td) { border: 2rpx solid #dfe2e5; padding: 12rpx 16rpx; } :deep(th) { background-color: #f6f8fa; } :deep(a) { color: #0366d6; text-decoration: none; &:hover { text-decoration: underline; } } :deep(img) { max-width: 100%; height: auto; } :deep(blockquote) { margin: 16rpx 0; padding: 0 16rpx; color: #6a737d; border-left: 4rpx solid #dfe2e5; } } .chat-input { padding: 24rpx 40rpx; position: fixed; left: 20rpx; right: 20rpx; bottom: 15rpx; display: flex; align-items: center; gap: 20rpx; z-index: 100; transition: bottom 0.3s ease; // 添加过渡动画 border-radius: 16rpx; border: 2rpx solid var(--Extra-Shallow-Theme, #f4f3fc); background: var(--White, #fff); box-shadow: 0px 8rpx 20rpx 0px rgba(62, 46, 136, 0.17); margin-bottom: 45rpx; .message-textarea { flex: 1; } } .typing-indicator { display: flex; align-items: center; gap: 8rpx; padding: 8rpx 0; .dot { width: 8rpx; height: 8rpx; background-color: #999; border-radius: 50%; animation: typing 1.4s infinite; &:nth-child(2) { animation-delay: 0.2s; } &:nth-child(3) { animation-delay: 0.4s; } } } @keyframes typing { 0%, 60%, 100% { transform: translateY(0); opacity: 0.3; } 30% { transform: translateY(-4rpx); opacity: 1; } } </style> markdown 输出的消息不能复制咋办
最新发布
07-23
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