@sanity/form-builder/lib/inputs/common/fileTarget/utils/extractFiles.js

Sanity form builder

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.extractDroppedFiles = extractDroppedFiles;
exports.extractPastedFiles = extractPastedFiles;
var _flatten2 = _interopRequireDefault(require("lodash/flatten"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
/**
 * Utilities for extracting files from dataTransfer in a predictable cross-browser fashion.
 * Also recursively extracts files from a directory
 * Inspired by https://github.com/component/normalized-upload
 */

function extractPastedFiles(dataTransfer) {
  if (dataTransfer.files && dataTransfer.files.length > 0) {
    return Promise.resolve(Array.from(dataTransfer.files || []));
  }
  return normalizeItems(Array.from(dataTransfer.items || [])).then(_flatten2.default);
}
function extractDroppedFiles(dataTransfer) {
  var files = Array.from(dataTransfer.files || []);
  var items = Array.from(dataTransfer.items || []);
  if (files && files.length > 0) {
    return Promise.resolve(files);
  }
  return normalizeItems(items).then(_flatten2.default);
}
function toArray(v) {
  return v === null ? [] : [v];
}
function normalizeItems(items) {
  return Promise.all(items.map(item => {
    // directory
    if (item.kind === 'file' && item.webkitGetAsEntry) {
      var entry;
      // Edge throws
      try {
        entry = item.webkitGetAsEntry();
      } catch (err) {
        return toArray(item.getAsFile());
      }
      if (!entry) {
        return [];
      }
      return entry.isDirectory ? walk(entry) : toArray(item.getAsFile());
    }
    if (item.kind === 'file') {
      var _file = item.getAsFile();
      return Promise.resolve(_file ? [_file] : []);
    }
    if (item.kind === 'string') {
      // We previously had support for reading datatransfer of strings here but decided to remove it since we don't handle it in higher up in the stack yet.
      // If one day we want to support data transfer from a string value (e.g. copy+paste from a field to another), an earlier
      // version of this file includes an implementation that uses DataTransferItem.getAsString to read the string value into a File
      console.warn('DataTransfer with kind="string" is currently not supported');
      return Promise.resolve([]);
    }
    console.warn('Unknown DataTransferItem.kind: %s', item.kind);
    return Promise.resolve([]);
  }));
}

// Warning: experimental API: https://wicg.github.io/entries-api

function walk(entry) {
  if (entry.isFile) {
    return new Promise((resolve, reject) => entry.file(resolve, reject)).then(file => [file]);
  }
  if (entry.isDirectory) {
    var dir = entry.createReader();
    return new Promise((resolve, reject) => dir.readEntries(resolve, reject)).then(entries => entries.filter(entr => !entr.name.startsWith('.'))).then(entries => Promise.all(entries.map(walk)).then(_flatten2.default));
  }
  return Promise.resolve([]);
}