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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package userutil
import (
"errors"
"fmt"
"strings"
"github.com/matrix-org/gomatrixserverlib"
)
// ParseUsernameParam extracts localpart from usernameParam.
// usernameParam can either be a user ID or just the localpart/username.
// If serverName is passed, it is verified against the domain obtained from usernameParam (if present)
// Returns error in case of invalid usernameParam.
func ParseUsernameParam(usernameParam string, expectedServerName *gomatrixserverlib.ServerName) (string, error) {
localpart := usernameParam
if strings.HasPrefix(usernameParam, "@") {
lp, domain, err := gomatrixserverlib.SplitID('@', usernameParam)
if err != nil {
return "", errors.New("invalid username")
}
if expectedServerName != nil && domain != *expectedServerName {
return "", errors.New("user ID does not belong to this server")
}
localpart = lp
}
return localpart, nil
}
// MakeUserID generates user ID from localpart & server name
func MakeUserID(localpart string, server gomatrixserverlib.ServerName) string {
return fmt.Sprintf("@%s:%s", localpart, string(server))
}
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