mirror of
https://github.com/ProtonMail/proton-bridge.git
synced 2025-12-10 04:36:43 +00:00
88 lines
2.4 KiB
Go
88 lines
2.4 KiB
Go
// Copyright (c) 2021 Proton Technologies AG
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//
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// This file is part of ProtonMail Bridge.
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//
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// ProtonMail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// ProtonMail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package id
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import (
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imapid "github.com/ProtonMail/go-imap-id"
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imapserver "github.com/emersion/go-imap/server"
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)
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type currentClientSetter interface {
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SetClient(name, version string)
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}
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// Extension for IMAP server.
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type extension struct {
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extID imapserver.ConnExtension
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clientSetter currentClientSetter
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}
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func (ext *extension) Capabilities(conn imapserver.Conn) []string {
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return ext.extID.Capabilities(conn)
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}
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func (ext *extension) Command(name string) imapserver.HandlerFactory {
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newIDHandler := ext.extID.Command(name)
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if newIDHandler == nil {
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return nil
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}
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return func() imapserver.Handler {
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if hdlrID, ok := newIDHandler().(*imapid.Handler); ok {
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return &handler{
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hdlrID: hdlrID,
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clientSetter: ext.clientSetter,
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}
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}
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return nil
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}
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}
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func (ext *extension) NewConn(conn imapserver.Conn) imapserver.Conn {
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return ext.extID.NewConn(conn)
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}
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type handler struct {
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hdlrID *imapid.Handler
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clientSetter currentClientSetter
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}
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func (hdlr *handler) Parse(fields []interface{}) error {
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return hdlr.hdlrID.Parse(fields)
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}
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func (hdlr *handler) Handle(conn imapserver.Conn) error {
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err := hdlr.hdlrID.Handle(conn)
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if err == nil {
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id := hdlr.hdlrID.Command.ID
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hdlr.clientSetter.SetClient(id[imapid.FieldName], id[imapid.FieldVersion])
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}
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return err
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}
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// NewExtension returns extension which is adding RFC2871 ID capability, with
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// direct interface to set information about email client to backend.
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func NewExtension(serverID imapid.ID, clientSetter currentClientSetter) imapserver.Extension {
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if conExtID, ok := imapid.NewExtension(serverID).(imapserver.ConnExtension); ok {
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return &extension{
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extID: conExtID,
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clientSetter: clientSetter,
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}
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}
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return nil
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}
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