<template>
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<div class="upload-file">
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<el-upload
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ref="uploadRef"
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v-model:file-list="fileList"
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:action="uploadUrl"
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:auto-upload="autoUpload"
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:before-upload="beforeUpload"
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:disabled="disabled"
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:drag="drag"
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:http-request="httpRequest"
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:limit="props.limit"
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:multiple="props.limit > 1"
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:on-error="excelUploadError"
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:on-exceed="handleExceed"
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:on-preview="handlePreview"
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:on-remove="handleRemove"
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:on-success="handleFileSuccess"
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:show-file-list="true"
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class="upload-file-uploader"
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name="file"
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>
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<el-button v-if="!disabled" type="primary">
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<Icon icon="ep:upload-filled" />
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选取文件
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</el-button>
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<template v-if="isShowTip && !disabled" #tip>
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<div style="font-size: 8px">
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大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
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</div>
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<div style="font-size: 8px">
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格式为 <b style="color: #f56c6c">{{ fileType.join('/') }}</b> 的文件
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</div>
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</template>
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<!-- TODO @puhui999：1）表单展示的时候，位置会偏掉，已发微信；2）disable 的时候，应该把【删除】按钮也隐藏掉？ -->
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<template #file="row">
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<div class="flex items-center">
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<span>{{ row.file.name }}</span>
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<div class="ml-10px">
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<el-link
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:href="row.file.url"
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:underline="false"
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download
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target="_blank"
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type="primary"
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>
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下载
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</el-link>
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</div>
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<div class="ml-10px">
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<el-button link type="danger" @click="handleRemove(row.file)"> 删除</el-button>
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</div>
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</div>
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</template>
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</el-upload>
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</div>
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</template>
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<script lang="ts" setup>
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import { propTypes } from '@/utils/propTypes'
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import type { UploadInstance, UploadProps, UploadRawFile, UploadUserFile } from 'element-plus'
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import { isString } from '@/utils/is'
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import { useUpload } from '@/components/UploadFile/src/useUpload'
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import { UploadFile } from 'element-plus/es/components/upload/src/upload'
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defineOptions({ name: 'UploadFile' })
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const message = useMessage() // 消息弹窗
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const emit = defineEmits(['update:modelValue'])
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const props = defineProps({
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modelValue: propTypes.oneOfType<string | string[]>([String, Array<String>]).isRequired,
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fileType: propTypes.array.def(['doc', 'xls', 'ppt', 'txt', 'pdf']), // 文件类型, 例如['png', 'jpg', 'jpeg']
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fileSize: propTypes.number.def(5), // 大小限制(MB)
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limit: propTypes.number.def(5), // 数量限制
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autoUpload: propTypes.bool.def(true), // 自动上传
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drag: propTypes.bool.def(false), // 拖拽上传
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isShowTip: propTypes.bool.def(true), // 是否显示提示
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disabled: propTypes.bool.def(false) // 是否禁用上传组件 ==> 非必传（默认为 false）
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})
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// ========== 上传相关 ==========
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const uploadRef = ref<UploadInstance>()
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const uploadList = ref<UploadUserFile[]>([])
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const fileList = ref<UploadUserFile[]>([])
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const uploadNumber = ref<number>(0)
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const { uploadUrl, httpRequest } = useUpload()
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// 文件上传之前判断
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const beforeUpload: UploadProps['beforeUpload'] = (file: UploadRawFile) => {
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if (fileList.value.length >= props.limit) {
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message.error(`上传文件数量不能超过${props.limit}个!`)
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return false
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}
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let fileExtension = ''
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if (file.name.lastIndexOf('.') > -1) {
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fileExtension = file.name.slice(file.name.lastIndexOf('.') + 1)
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}
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const isImg = props.fileType.some((type: string) => {
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if (file.type.indexOf(type) > -1) return true
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return !!(fileExtension && fileExtension.indexOf(type) > -1)
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})
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const isLimit = file.size < props.fileSize * 1024 * 1024
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if (!isImg) {
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message.error(`文件格式不正确, 请上传${props.fileType.join('/')}格式!`)
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return false
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}
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if (!isLimit) {
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message.error(`上传文件大小不能超过${props.fileSize}MB!`)
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return false
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}
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message.success('正在上传文件，请稍候...')
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uploadNumber.value++
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}
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// 处理上传的文件发生变化
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// const handleFileChange = (uploadFile: UploadFile): void => {
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// uploadRef.value.data.path = uploadFile.name
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// }
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// 文件上传成功
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const handleFileSuccess: UploadProps['onSuccess'] = (res: any): void => {
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message.success('上传成功')
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// 删除自身
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const index = fileList.value.findIndex((item) => item.response?.data === res.data)
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fileList.value.splice(index, 1)
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uploadList.value.push({ name: res.data, url: res.data })
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if (uploadList.value.length == uploadNumber.value) {
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fileList.value.push(...uploadList.value)
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uploadList.value = []
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uploadNumber.value = 0
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emitUpdateModelValue()
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}
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}
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// 文件数超出提示
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const handleExceed: UploadProps['onExceed'] = (): void => {
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message.error(`上传文件数量不能超过${props.limit}个!`)
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}
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// 上传错误提示
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const excelUploadError: UploadProps['onError'] = (): void => {
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message.error('导入数据失败，请您重新上传！')
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}
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// 删除上传文件
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const handleRemove = (file: UploadFile) => {
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const index = fileList.value.map((f) => f.name).indexOf(file.name)
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if (index > -1) {
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fileList.value.splice(index, 1)
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emitUpdateModelValue()
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}
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}
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const handlePreview: UploadProps['onPreview'] = (uploadFile) => {
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console.log(uploadFile)
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}
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// 监听模型绑定值变动
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watch(
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() => props.modelValue,
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(val: string | string[]) => {
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if (!val) {
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fileList.value = [] // fix：处理掉缓存，表单重置后上传组件的内容并没有重置
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return
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}
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fileList.value = [] // 保障数据为空
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// 情况1：字符串
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if (isString(val)) {
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fileList.value.push(
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...val.split(',').map((url) => ({ name: url.substring(url.lastIndexOf('/') + 1), url }))
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)
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return
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}
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// 情况2：数组
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fileList.value.push(
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...(val as string[]).map((url) => ({ name: url.substring(url.lastIndexOf('/') + 1), url }))
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)
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},
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{ immediate: true, deep: true }
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)
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// 发送文件链接列表更新
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const emitUpdateModelValue = () => {
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// 情况1：数组结果
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let result: string | string[] = fileList.value.map((file) => file.url!)
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// 情况2：逗号分隔的字符串
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if (props.limit === 1 || isString(props.modelValue)) {
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result = result.join(',')
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}
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emit('update:modelValue', result)
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}
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</script>
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<style lang="scss" scoped>
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.upload-file-uploader {
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margin-bottom: 5px;
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}
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:deep(.upload-file-list .el-upload-list__item) {
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position: relative;
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margin-bottom: 10px;
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line-height: 2;
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border: 1px solid #e4e7ed;
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}
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:deep(.el-upload-list__item-file-name) {
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max-width: 250px;
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}
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:deep(.upload-file-list .ele-upload-list__item-content) {
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display: flex;
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justify-content: space-between;
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align-items: center;
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color: inherit;
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}
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:deep(.ele-upload-list__item-content-action .el-link) {
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margin-right: 10px;
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}
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</style>
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