<template>
  <div>
    <el-upload
      ref="upload"
      :multiple="true"
      :http-request="uploadFile"
      :file-list="fileList"
      action
      :auto-upload="false"
      :before-upload="beforeAvatarUpload"
    >
      <i class="el-icon-plus fileUpload"></i>
    </el-upload>
    <el-button
      style="margin-left: 10px"
      size="small"
      type="success"
      @click="submitUpload"
      >上传到服务器</el-button
    >
  </div>
</template>

<script>
export default {
  props:{
    fileList:{
      type:Array,
      default:[]
    },
  },
  data() {
    return {
      filedata: [],
      fileArr: [],
    };
  },
  mounted(){
  },
  methods: {
    submitUpload() {
      this.filedata = new FormData(); //  用FormData存放上传文件
      this.$refs.upload.submit(); // 会循环调用uploadFile方法，多个文件调用多次

      let _this = this;
      _this
        .$https(
          {
            method: "post",
            url: "file/datum/upload",
            authType: this.backToken,
          },
          this.filedata
        )
        .then((res) => {
          let resData = res.data;
          if (resData.resultCode == "200") {
            const data = resData.data.fileList;
            let newArray = data.map((item) => item.id);
            let editArray =[]
            if(this.fileList.length){
              editArray = this.fileList.map(item=>item.id)
            }
            this.$emit("datumList", [...newArray,...editArray]);
          } else {
            _this.$message.error(resData.msg || resData.message);
          }
        })
        .catch((err) => {
          console.log(err);
          _this.$message.error(err.msg || err.message);
        });
    },
    uploadFile(file) {
      this.filedata.append("file", file.file);
    },
    beforeAvatarUpload(file) {
      const isLt10G = file.size / 1024 / 1024 / 1024 < 10;
      if (!isLt10G) {
        this.$message.error("上传文件大小不能超过 10GB!");
      }
      return isLt10G;
    }
  }
};
</script>

<style>
.fileUpload {
  width: 148px;
  height: 148px;
  line-height: 148px;
  margin: 0 auto;
  border: 1px dashed #c0ccda;
  font-size: 24px;
  font: #ccc;
}
</style>