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| <template>
<div class="wheel-uploader">
<div @click="onClickUpload">
<slot></slot>
</div>
<ol class="wheel-uploader-fileList">
<li v-for="file in fileList" :key="file.name">
<template v-if="file.status === 'uploading'">
<w-icon name="loading" class="wheel-uploader-spin"></w-icon>
</template>
<template v-else-if="file.type.indexOf('image') === 0">
<img class="wheel-uploader-image" :src="file.url" width="32" height="32" alt="">
</template>
<temaplte v-else>
<div class="wheel-uploader-defaultImage"></div>
</temaplte>
<span class="wheel-uploader-name" :class="{[file.status]: file.status}">{{file.name}}</span>
<button class="wheel-uploader-remove" @click="onRemoveFile(file)">x</button>
</li>
</ol>
<div ref="temp" style="width: 0; height: 0; overflow: hidden;"></div>
</div>
</template>
<script>
import WIcon from '../icon/icon'
import http from '../http'
export default {
name: "WheelUploader",
components: {WIcon},
props: {
name: {type: String, required: true},
action: {type: String, required: true},
method: {type: String, default: 'POST'},
parseResponse: {type: Function, required: true},
fileList: {type: Array, default: () => []},
sizeLimit: {type: Number}
},
data () {
return {
url: 'about:blank'
}
},
methods: {
onClickUpload () {
let input = this.createInput()
input.addEventListener('change', (e) => {
this.uploadFiles(input.files) // 单文件
input.remove()
})
input.click()
},
onRemoveFile (file) {
let answer = window.confirm('你确定要删除这玩意吗')
if (answer) {
let copy = [...this.fileList]
let index = copy.indexOf(file)
copy.splice(index, 1)
this.$emit('update:fileList', copy)
}
},
beforeUploadFiles (rawFiles, newNames) {
rawFiles = Array.from(rawFiles)
for (let i = 0; i < rawFiles.length; i++) {
let {size, type} = rawFiles[i]
I if (size > this.sizeLimit) {
this.$emit('error', '文件大于2MB')
return false
}
}
let x = rawFiles.map((rawFile, i) => {
let {type, size} = rawFile
return {name: newNames[i], type, size, status: 'uploading'}
})
this.$emit('update:fileList', [...this.fileList, ...x])
return true
},
afterUploadFiles (newName, url) {
let file = this.fileList.filter(f => f.name === newName)[0]
let index = this.fileList.indexOf(file)
let fileCopy = JSON.parse(JSON.stringify(file))
fileCopy.url = url
fileCopy.status = 'success'
let fileListCopy = [...this.fileList]
fileListCopy.splice(index, 1, fileCopy)
this.$emit('update:fileList', fileListCopy)
this.$emit('uploaded')
},
uploadFiles (rawFiles) {
let newNames = []
for (let i = 0; i < rawFiles.length; i++) {
let rawFile = rawFiles[i]
let {name, size, type} = rawFile
let newName = this.generateName(name)
newNames[i] = newName
}
I if (!this.beforeUploadFiles(rawFiles, newNames)) {return}
for (let i = 0; i < rawFiles.length; i++) {
let rawFile = rawFiles[i]
let newName = newNames[i]
let formData = new FormData()
formData.append(this.name, rawFile)
this.doUploadFiles(formData, (response) => {
let url = this.parseResponse(response)
this.url = url
this.afterUploadFiles(newName, url)
}, (xhr) => {
this.uploadError(xhr, newName)
})
}
},
uploadError (xhr, newName) {
let file = this.fileList.filter(f => f.name === newName)[0]
let index = this.fileList.indexOf(file)
let fileCopy = JSON.parse(JSON.stringify(file))
fileCopy.status = 'fail'
// fileCopy.failMessage = '尺寸过大'
let fileListCopy = [...this.fileList]
fileListCopy.splice(index, 1, fileCopy)
this.$emit('update:fileList', fileListCopy)
let error = ''
if (xhr.status === 0) {
error = '网络无法连接'
}
this.$emit('error', error)
},
generateName (name) {
while (this.fileList.filter(f => f.name === name).length > 0) {
let dotIndex = name.lastIndexOf('.')
let nameWithoutExtension = name.substring(0, dotIndex)
let extension = name.substring(dotIndex)
name = nameWithoutExtension + '(1)' + extension
}
return name
},
doUploadFiles (formData, success, fail) {
http[this.method.toLowerCase()](this.action, {success, fail, data: formData})
},
createInput () {
this.$refs.temp.innerHTML = ''
let input = document.createElement('input')
input.accept = "image/png"
input.type = 'file'
input.multiple = true
this.$refs.temp.appendChild(input)
return input
}
}
}
</script>
<style scoped lang="scss">
@import "var";
.wheel-uploader {
&-fileList {
list-style: none;
> li {
display: flex;
align-items: center;
margin: 8px 0;
border: 1px solid darken($grey, 10%);
}
}
&-defaultImage {
width: 32px;
height: 32px;
margin-right: 8px;
}
&-image {
margin-right: 8px;
border: none;
}
&-name {
margin-right: auto;
&.success {
color: green;
}
&.fail {
color: red;
}
}
&-remove {
width: 32px;
height: 32px;
}
&-spin {
width: 32px;
height: 32px;
@include spin;
}
}
</style> |