Box: Delete Shared Link of File

function main() {
  const oauth2 = configs.getObject("conf_OAuth2");
  const fileId = decideFileId();
  checkExistingSharedLink(oauth2, fileId);
  deleteSharedLink(oauth2, fileId);
}

/**
 * ファイルのIDをconfigから読み出して出力する。
 * @return {String} fileId ファイルの ID
 */
function decideFileId() {
  let fileId = "";
  const fileIdDef = configs.getObject("conf_FileId");
  if (fileIdDef === null) {
    fileId = configs.get("conf_FileId");
  } else {
    fileId = engine.findData(fileIdDef);
  }
  if (fileId === "" || fileId === null) {
    throw "File ID is blank";
  }
  return fileId;
}

/**
 * ファイルに共有リンクが作成されているか調べ、無い場合はエラーにする
 * @param {AuthSettingWrapper} oauth2  OAuth2 認証設定
 * @param {String} fileId ファイルの ID
 */
function checkExistingSharedLink(oauth2, fileId) {
  const url = `https://api.box.com/2.0/files/${fileId}?fields=shared_link`;
  const response = httpClient.begin().authSetting(oauth2).get(url);

  const status = response.getStatusCode();
  const responseTxt = response.getResponseAsString();

  if (status !== 200) {
    engine.log(responseTxt);
    throw `Failed to get file information. status:${status}`;
  }
  const jsonRes = JSON.parse(responseTxt);

  if (jsonRes.shared_link === null) {
    throw `Failed to Delete Shared Link. \n The file(ID:${fileId}) doesn't have a Shared link.`;
  }
}

/**
 * Delete Shared Link to File on Box 共有リンク削除
 * @param {AuthSettingWrapper} oauth2  OAuth2 認証設定
 * @param {String} fileId 共有リンクを削除したいファイルのID
 */
function deleteSharedLink(oauth2, fileId) {
  const jsonBody = {};
  jsonBody["shared_link"] = null;

  const url = `https://api.box.com/2.0/files/${fileId}?fields=shared_link`;
  const response = httpClient
    .begin()
    .authSetting(oauth2)
    .body(JSON.stringify(jsonBody), "application/json; charset=UTF-8")
    .put(url);
  const status = response.getStatusCode();
  const responseTxt = response.getResponseAsString();
  if (status !== 200) {
    const error = `Failed to delete. status:${status}`;
    engine.log(responseTxt);
    throw error;
  }
  engine.log(`status: ${status} Shared Link was deleted, file ID: ${fileId}`);
}