preact-arco-design/es/Upload/util.js

Arco Design React UI Library.

import { isArray } from "../_util/is";
export var isAcceptFile = function isAcceptFile(file, accept) {
  if (accept && file) {
    var accepts = isArray(accept) ? accept : accept.split(',').map(function (x) {
      return x.trim();
    }).filter(function (x) {
      return x;
    });
    var fileExtension_1 = file.name.indexOf('.') > -1 ? file.name.split('.').pop() : '';
    return accepts.some(function (type) {
      var text = type && type.toLowerCase();
      var fileType = (file.type || '').toLowerCase();

      if (text === fileType) {
        // 类似excel文件这种
        // 比如application/vnd.ms-excel和application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
        // 本身就带有.字符的，不能走下面的.jpg等文件扩展名判断处理
        // 所以优先对比input的accept类型和文件对象的type值
        return true;
      }

      if (/\/\*/.test(text)) {
        // image/* 这种通配的形式处理
        return fileType.replace(/\/.*$/, '') === text.replace(/\/.*$/, '');
      }

      if (/\..*/.test(text)) {
        // .jpg 等后缀名
        return text === ".".concat(fileExtension_1 && fileExtension_1.toLowerCase());
      }

      return false;
    });
  }

  return !!file;
};
export var getFiles = function getFiles(fileList, accept) {
  if (!fileList) {
    return;
  }

  var files = [].slice.call(fileList);

  if (accept) {
    files = files.filter(function (file) {
      return isAcceptFile(file, accept);
    });
  }

  return files;
};
export var loopDirectory = function loopDirectory(items, accept, callback) {
  var files = [];
  var restFileCount = 0; // 剩余上传文件的数量

  var onFinish = function onFinish() {
    !restFileCount && callback(files);
  };

  var _loopDirectory = function _loopDirectory(item) {
    restFileCount += 1;

    if (item.isFile) {
      item.file(function (file) {
        restFileCount -= 1;

        if (isAcceptFile(file, accept)) {
          Object.defineProperty(file, 'webkitRelativePath', {
            value: item.fullPath.replace(/^\//, '')
          });
          files.push(file);
        }

        onFinish();
      });
      return;
    }

    if (item.isDirectory) {
      // item 是个文件夹
      var reader_1 = item.createReader();
      var flag_1 = false;

      var readEntries_1 = function readEntries_1() {
        reader_1.readEntries(function (entries) {
          if (!flag_1) {
            restFileCount -= 1;
            flag_1 = true;
          }

          if (entries.length === 0) {
            onFinish();
          } else {
            readEntries_1(); // the maximum files read using readEntries is 100

            entries.forEach(_loopDirectory);
          }
        });
      };

      readEntries_1();
      return;
    }

    restFileCount -= 1;
    onFinish();
  };

  var list = [].slice.call(items);
  list.forEach(function (item) {
    if (item.webkitGetAsEntry) {
      _loopDirectory(item.webkitGetAsEntry());
    }
  });
};