Cloud Identity APIでGoogleグループのメンバーリストの取得、メンバー追加・削除をするGoogle Apps Script

GoogleGroup.js

/**
 * ユーザーリストを返す
 * @param {string} groupEmail - グループのEmail
 * @return {string[]} - ユーザーEmailのリスト
 */
function listMembers(groupEmail) {
  let memberships = listMemberships(groupEmail);
  var members = [];
  for (const membership of memberships) {
    // ロールがオブジェクトかつ配列になっているので「,」でジョインした文字列にする
    var roles = [];
    membership['roles'].forEach(function (value) {
      var property = Object.entries(value);
      property.forEach(function (v) {
        roles.push(v[1]);
      });
    });
    members.push([membership['preferredMemberKey']['id'], roles.join()]);
  }
  return members;
}

/**
 * ユーザーをグループに追加
 * @param {string} userEmail  - ユーザーのEmail
 * @param {string} groupEmail - グループのEmail
 * @return {string} - 実行結果
 */
function insertMember(userEmail, groupEmail) {
  const url = `https://cloudidentity.googleapis.com/v1/${getGroupId(groupEmail)}/memberships`;
  let body = {
    "preferredMemberKey": { "id": userEmail },
    "roles": {
      "name": "MEMBER"
    }
  }
  let response = UrlFetchApp.fetch(url, {
    headers: {
      Authorization: `Bearer ${getToken()}`
    },
    method: "POST",
    contentType: "application/json",
    payload: JSON.stringify(body),
    muteHttpExceptions: true
  });
  console.log(response.getContentText());
  return response.getContentText();
}

/**
 * ユーザーをグループから削除
 * @param {string} userEmail  - ユーザーのEmail
 * @param {string} groupEmail - グループのEmail
 * @return {string} - 実行結果
 */
function deleteMember(userEmail, groupEmail) {
  const url = `https://cloudidentity.googleapis.com/v1/${getMembershipId(userEmail, groupEmail)}`
  let response = UrlFetchApp.fetch(url, {
    headers: {
      Authorization: `Bearer ${getToken()}`
    },
    method: "DELETE",
    muteHttpExceptions: true
  });
  console.log(response.getContentText());
  return response.getContentText();
}

function listMemberships(groupEmail) {
  let memberships = [];
  let response;
  let nextPageToken;
  do {
    response = listMembershipByPageToken(groupEmail, nextPageToken);
    memberships = memberships.concat(response["memberships"]);
    // debug
    console.log(memberships);
    nextPageToken = response["nextPageToken"];
    if (typeof nextPageToken === 'undefined') {
      return memberships;
    }
  } while (true);
}

function listMembershipByPageToken(groupEmail, pageToken) {
  let url = `https://cloudidentity.googleapis.com/v1/${getGroupId(groupEmail)}/memberships`;
  if (typeof pageToken !== 'undefined') {
    url += `?pageToken=${pageToken}`
  }
  // debug
  // console.log(url);
  let response = UrlFetchApp.fetch(url, {
    headers: {
      Authorization: `Bearer ${getToken()}`
    }
  });
  return JSON.parse(response.getContentText());
}


function getToken() {
  return ScriptApp.getOAuthToken();
}

function getGroupId(groupEmail) {
  const url = "https://cloudidentity.googleapis.com/v1/groups:lookup";
  let response = UrlFetchApp.fetch(url + "?groupKey.id=" + groupEmail, {
    headers: {
      Authorization: `Bearer ${getToken()}`
    }
  });
  let res_json = JSON.parse(response.getContentText());
  return res_json["name"];
}

function getMembershipId(userEmail, groupEmail) {
  const memberships = listMemberships(groupEmail);
  for (const membership of memberships) {
    if (membership['preferredMemberKey']['id'] == userEmail) {
      return membership['name'];
    }
  }
  return null;
}

# example
function myFunction() {
  const groupEmail = "foo-group@example.com";
  const userEmail = "bar-member@example.com";

  // メンバーリストの取得
  var members = listMembers(groupEmail);
  console.log(members);

  // メンバーをGoogleグループに追加
  insertMember(userEmail, groupEmail);

  // Googleグループからメンバーを削除
  deleteMember(userEmail, groupEmail);
}