从“群组”服务迁移到 Cloud Identity 群组高级服务

Cloud Identity Groups (CIG) Advanced Service 提供与 Groups Service API 相同的功能，并且可以替代后者使用。

请参阅提供的辅助方法，了解如何通过 CIG Advanced Service 实现等效功能。

设置

如需使用 CIG Advanced Service，请先在脚本项目中 启用它。

为缩短本指南中的部分方法签名，我们定义了以下变量：

const groups = CloudIdentityGroups.Groups;

GroupsApp 方法

以下辅助方法与 Groups Service GroupsApp 的辅助方法相对应。

在本指南中，术语群组是指群组 资源， 而不是群组类对象。 群组资源 是 JavaScript 对象，没有方法，但可以在 CIG Advanced Service 中使用，以检索与 群组 类对象中的信息类似的信息。

getGroupByEmail

/**
 * Given a group's email, returns that group's resource
 *
 * @param {String} email: The email address to lookup a group by
 * @return {Group} group: The group resource associated with the email
 */
function groupsAppGetGroupByEmail(email) {
  // Retrieve the name ID of the group
  const groupName = groups.lookup({
    'groupKey.id': email,
    'groupKey.namespace': ''  // Optional for google groups, dynamic groups, and security groups
                              // Necessary for identity-mapped groups (see https://developers.google.com/cloud-search/docs/guides/identity-mapping)
  }).name;

  // Retrieve the group resource
  return groups.get(groupName);
}

getGroups

以下辅助方法会返回成员资格资源列表。 访问元素的 group 字段即可找到其名称 ID。这对于 CIG Advanced Service 的许多方法都非常有用。同样，访问元素的 groupKey.id 即可找到其电子邮件地址。

/**
 * Retrieves all the membership relation resources to groups which you are a
 * direct member (or a pending member).
 *
 * @return {Array<MembershipRelation>} groups : List of direct memberships where
 * you are the member.
 */
function groupsAppGetGroups() {
  const myEmail = Session.getActiveUser().getEmail();
  let pageToken = '';
  let membershipList = [];

  do {
    const queryParams = {
      query:`member_key_id=='${myEmail}'`,
      pageToken:pageToken
    };
    const searchResult = groups.Memberships.searchDirectGroups('groups/-', queryParams);
    membershipList = membershipList.concat(searchResult.memberships);
    pageToken = searchResult.nextPageToken;
  } while (pageToken);

  return membershipList;
}

群组方法

以下辅助方法与 Groups Service Group Class 的辅助方法相对应。

getEmail

/**
 * Gets a group's email address
 *
 * @param {Object} group: A group resource
 * @return {String} email: The email associated with the group resource.
 */
function getEmail(group) {
  return group.groupKey.id;
}

getGroups

以下方法使用 Memberships.list， 该方法会提取给定群组的每个成员资格。包括用户和群组的成员资格。

为了更好地近似 Groups Service getGroups 方法，我们可以按成员资格的 Type过滤成员资格。 我们可以通过以下任一方式访问此字段：将 FULL View 作为查询参数提供给 Memberships.list ，或者为每个给定的成员资格执行单独的 Memberships.lookup 。

/**
 * Fetch a list of memberships with provided group as its parent
 *
 * @param {Group} group: A group resource
 * @return {Array<Membership>} membershipList: The memberships where the parent
 * is the provided group and member is a also a group.
 */
function getGroups(group) {
  let membershipList = [];
  let pageToken = '';

  do {
    // Fetch a page of memberships
    const queryParams = {
      view: 'FULL',
      pageToken: pageToken
    }
    const response = groups.Memberships.list(group.name, queryParams);

    // Filter non-group memberships
    const onlyGroupMemberships = response.memberships.filter(
      membership => membership.type == 'GROUP'
    );
    membershipList = membershipList.concat(onlyGroupMemberships);

    // Set up next page
    pageToken = response.nextPageToken;
  } while(pageToken);

  return membershipList;
}

getRole 和 getRoles

虽然 Groups Service 可能仅在 getRole 中返回优先级最高的角色，但成员资格资源中的 roles 字段包含成员有资格担任的每个角色的单独元素（例如：MEMBER、OWNER、ADMIN）。

/**
 * Retrieve the membership roles of a member to a group.
 *
 * @param {Group} containingGroup: The group whom the member belongs to
 * @param {String} email: The email address associated with a member that
 * belongs to the containingGroup
 * @return {Array<Role>} roles: List of roles the member holds with respect to
 * the containingGroup.
 */
function getRoleWithEmail(containingGroup, email) {
  // First fetch the membership
  const membershipName = groups.Memberships.lookup(containingGroup.name, { 'memberKey.id': email }).name;
  const membership = groups.Memberships.get(membershipName);

  // Then retrieve the role
  return membership.roles;
}

/**
 * Retrieve the membership roles of a member to a group.
 *
 * @param {Group} containingGroup: The group resource whom the member belongs to
 * @param {User} user: The user associated with a member that belongs to the
 * containingGroup
 * @return {Array<Role>} roles: List of roles the member holds with respect to
 * the containingGroup
 */
function getRoleWithUser(containingGroup, user) {
  return getRoleWithEmail(containingGroup, user.getEmail());
}

/**
 * Retrieve the membership roles of a group of members to a group
 *
 * @param {Group} containingGroup: The group resource to which roles are
 * relevant
 * @param {Array<User>} users: List of users to fetch roles from
 * @return {Array<Array<Role>>} roles: A list where every element is a list of
 * roles of member to the containingGroup
 */
function getRoles(containingGroup, users) {
  let roles = [];
  for (const user of users) {
    roles.push(getRoleWithUser(containingGroup, user));
  }
  return roles;
}

getUsers

与 getGroups 中的方法类似，我们可以使用 Memberships.list 提取群组的成员资格，并过滤结果以仅保留目标 Type。

/**
 * Given a group, retrieve its direct members and banned members of the group
 * that have a known corresponding Google Account.
 *
 * @param {Group} group: The group Resource whom the users being queried belong
 * to
 * @return {Array<String>} users: A list of emails associated with members of
 * the given group
 */
function getUsers(group) {
  let userList = [];
  let pageToken = '';

  do {
    // Fetch a page of memberships from the group
    const queryParams = {
      view: 'FULL',
      pageToken: pageToken
    }
    const listResponse = groups.Memberships.list(group.name, queryParams);

    // Filter non-users and keep member emails
    const users = listResponse.memberships
      .filter(membership => membership.type == 'USER')
      .map(membership => membership.preferredMemberKey.id);
    userList = userList.concat(users);

    // Prepare next page
    pageToken = listResponse.nextPageToken;
  } while (pageToken);

  return userList;
}

hasGroup 和 hasUser

Groups Service hasGroup 和 hasUser 都会确认实体是否为给定群组的成员。鉴于群组和用户都可以用电子邮件地址表示，因此可以使用以下方法确认两者是否属于给定群组。

/**
 * Tests if the given email has an associated direct member to the given group.
 *
 * @param {Group} group: Group resource to which the entity is checked as
 * a member
 * @param {String} email: Email that can represent a Group or User entity
 * @return {Boolean} isMember: Whether the entity is a direct member to the
 * group or not
 */
function checkDirectGroupMembership(group, email) {
  try {
    groups.Memberships.lookup(group.name, {'memberKey.id': email});

  } catch(e) {
    // Log failure if exception is not related to membership existence
    if (!e.message.includes('Membership does not exist.')) {
      console.error(e);
    }
    return false;
  }
  return true;
}