react-native-surveys/Forms/api/react-dropzone/file-selector/file.js

Build your own forms, surveys and polls for your React Native apps.

export const COMMON_MIME_TYPES = new Map([
  ["avi", "video/avi"],
  ["gif", "image/gif"],
  ["ico", "image/x-icon"],
  ["jpeg", "image/jpeg"],
  ["jpg", "image/jpeg"],
  ["mkv", "video/x-matroska"],
  ["mov", "video/quicktime"],
  ["mp4", "video/mp4"],
  ["pdf", "application/pdf"],
  ["png", "image/png"],
  ["zip", "application/zip"],
  ["doc", "application/msword"],
  [
    "docx",
    "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
  ]
]);
export function toFileWithPath(file, path) {
  const f = withMimeType(file);

  if (typeof f.path !== "string") {
    // on electron, path is already set to the absolute path
    const { webkitRelativePath } = file;
    Object.defineProperty(f, "path", {
      value:
        typeof path === "string"
          ? path // If <input webkitdirectory> is set,
          : // the File will have a {webkitRelativePath} property
          // https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/webkitdirectory
          typeof webkitRelativePath === "string" &&
            webkitRelativePath.length > 0
          ? webkitRelativePath
          : file.name,
      writable: false,
      configurable: false,
      enumerable: true
    });
  }

  return f;
}

function withMimeType(file) {
  const { name } = file;
  const hasExtension = name && name.lastIndexOf(".") !== -1;

  if (hasExtension && !file.type) {
    const ext = name
      .split(".")
      .pop()
      .toLowerCase();
    const type = COMMON_MIME_TYPES.get(ext);

    if (type) {
      Object.defineProperty(file, "type", {
        value: type,
        writable: false,
        configurable: false,
        enumerable: true
      });
    }
  }

  return file;
}