@classmethod

    def extract(cls, val):

        if isinstance(val, cls):

            return val.getval()

        return val

def get_user_or_error(userid):

    """

    Get user by id or name or return JsonRPCError if not found

    :param userid:

    """

    user = UserModel().get_user(userid)

    if user is None:

        raise JSONRPCError("user `%s` does not exist" % userid)

    return user

def get_repo_or_error(repoid):

    """

    Get repo by id or name or return JsonRPCError if not found

    """

    repo = RepoModel().get_repo(repoid)

    if repo is None:

        raise JSONRPCError('repository `%s` does not exist' % (repoid))

    return repo

def get_users_group_or_error(usersgroupid):

    """

    Get user group by id or name or return JsonRPCError if not found

    :param userid:

    """

    users_group = UserGroupModel().get_group(usersgroupid)

    if users_group is None:

        raise JSONRPCError('user group `%s` does not exist' % usersgroupid)

    return users_group

def get_perm_or_error(permid):

    """

    Get permission by id or name or return JsonRPCError if not found

    :param userid:

        :param apiuser:

        :param remove_obsolete:

        """

        try:

            rm_obsolete = Optional.extract(remove_obsolete)

            added, removed = repo2db_mapper(ScmModel().repo_scan(),

                                            remove_obsolete=rm_obsolete)

            return {'added': added, 'removed': removed}

        except Exception:

            log.error(traceback.format_exc())

            raise JSONRPCError(

                'Error occurred during rescan repositories action'

            )

    def invalidate_cache(self, apiuser, repoid):

        """

        Dispatch cache invalidation action on given repo

        :param apiuser:

        :param repoid:

        """

        repo = get_repo_or_error(repoid)

            # check if we have admin permission for this repo !

            if HasRepoPermissionAnyApi('repository.admin',

                                       'repository.write')(user=apiuser,

                                            repo_name=repo.repo_name) is False:

                raise JSONRPCError('repository `%s` does not exist' % (repoid))

        try:

            ScmModel().mark_for_invalidation(repo.repo_name)

            return ('Caches of repository `%s` was invalidated' % repoid)

        except Exception:

            log.error(traceback.format_exc())

            raise JSONRPCError(

                'Error occurred during cache invalidation action'

            )

    def lock(self, apiuser, repoid, locked=Optional(None),

             userid=Optional(OAttr('apiuser'))):

        """

        Set locking state on particular repository by given user, if

        this command is runned by non-admin account userid is set to user

        who is calling this method

        :param apiuser:

        :param repoid:

        :param userid:

        :param locked:

        """

        repo = get_repo_or_error(repoid)

        if HasPermissionAnyApi('hg.admin')(user=apiuser):

            pass

        elif HasRepoPermissionAnyApi('repository.admin',

                                     'repository.write')(user=apiuser,

                                                         repo_name=repo.repo_name):

            #make sure normal user does not pass someone else userid,

            #he is not allowed to do that

            if not isinstance(userid, Optional) and userid != apiuser.user_id:

                raise JSONRPCError(

                    'userid is not the same as your user'

                )

                _d = {

                    'repo': repo.repo_name,

                    'locked': locked,

                    'locked_since': lock_time,

                    'locked_by': user.username,

                    'msg': ('User `%s` set lock state for repo `%s` to `%s`'

                            % (user.username, repo.repo_name, locked))

                }

                return _d

            except Exception:

                log.error(traceback.format_exc())

                raise JSONRPCError(

                    'Error occurred locking repository `%s`' % repo.repo_name

                )

    def get_locks(self, apiuser, userid=Optional(OAttr('apiuser'))):

        """

        Get all locks for given userid, if

        this command is runned by non-admin account userid is set to user

        who is calling this method, thus returning locks for himself

        :param apiuser:

        :param userid:

        """

            #make sure normal user does not pass someone else userid,

            #he is not allowed to do that

            if not isinstance(userid, Optional) and userid != apiuser.user_id:

                raise JSONRPCError(

                    'userid is not the same as your user'

                )

        ret = []

        if isinstance(userid, Optional):

            user = None

        else:

            user = get_user_or_error(userid)

        #show all locks

        for r in Repository.getAll():

            userid, time_ = r.locked

            if time_:

                _api_data = r.get_api_data()

                # if we use userfilter just show the locks for this user

                if user:

                    if safe_int(userid) == user.user_id:

                        ret.append(_api_data)

                else:

                    ret.append(_api_data)

    @HasPermissionAllDecorator('hg.admin')

    def show_ip(self, apiuser, userid):

        """

        Shows IP address as seen from RhodeCode server, together with all

        defined IP addresses for given user

        :param apiuser:

        :param userid:

        """

        user = get_user_or_error(userid)

        ips = UserIpMap.query().filter(UserIpMap.user == user).all()

        return dict(

            ip_addr_server=self.ip_addr,

            user_ips=ips

        )

    def get_user(self, apiuser, userid=Optional(OAttr('apiuser'))):

        """"

        Get a user by username, or userid, if userid is given

        :param apiuser:

        :param userid:

        """

            #make sure normal user does not pass someone else userid,

            #he is not allowed to do that

            if not isinstance(userid, Optional) and userid != apiuser.user_id:

                raise JSONRPCError(

                    'userid is not the same as your user'

                )

        if isinstance(userid, Optional):

            userid = apiuser.user_id

        user = get_user_or_error(userid)

        data = user.get_api_data()

        data['permissions'] = AuthUser(user_id=user.user_id).permissions

        return data

    @HasPermissionAllDecorator('hg.admin')

    def get_users(self, apiuser):

        """"

        Get all users

        :param apiuser:

        """

        result = []

                                                               user)

            msg = 'removed member `%s` from user group `%s`' % (

                        user.username, users_group.users_group_name

                    )

            msg = msg if success else "User wasn't in group"

            Session().commit()

            return dict(success=success, msg=msg)

        except Exception:

            log.error(traceback.format_exc())

            raise JSONRPCError(

                'failed to remove member from user group `%s`' % (

                        users_group.users_group_name

                    )

            )

    def get_repo(self, apiuser, repoid):

        """"

        Get repository by name

        :param apiuser:

        :param repoid:

        """

        repo = get_repo_or_error(repoid)

            # check if we have admin permission for this repo !

                raise JSONRPCError('repository `%s` does not exist' % (repoid))

        members = []

        followers = []

        for user in repo.repo_to_perm:

            perm = user.permission.permission_name

            user = user.user

            user_data = user.get_api_data()

            user_data['type'] = "user"

            user_data['permission'] = perm

            members.append(user_data)

        for users_group in repo.users_group_to_perm:

            perm = users_group.permission.permission_name

            users_group = users_group.users_group

            users_group_data = users_group.get_api_data()

            users_group_data['type'] = "users_group"

            users_group_data['permission'] = perm

            members.append(users_group_data)

        for user in repo.followers:

            followers.append(user.user.get_api_data())

        data = repo.get_api_data()

        data['members'] = members

        data['followers'] = followers

        return data

    def get_repos(self, apiuser):

        """"

        Get all repositories

        :param apiuser:

        """

        result = []

        if HasPermissionAnyApi('hg.admin')(user=apiuser) is False:

            repos = RepoModel().get_all_user_repos(user=apiuser)

        else:

            repos = RepoModel().get_all()

        for repo in repos:

            result.append(repo.get_api_data())

        return result

    @HasPermissionAllDecorator('hg.admin')

    def get_repo_nodes(self, apiuser, repoid, revision, root_path,

                       ret_type='all'):

        """

        returns a list of nodes and it's children

        for a given path at given revision. It's possible to specify ret_type

        to show only files or dirs