forked from Silverfish/proton-bridge
110 lines
3.2 KiB
Go
110 lines
3.2 KiB
Go
// Copyright (c) 2022 Proton AG
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//
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// This file is part of Proton Mail Bridge.
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//
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// Proton Mail 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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// Proton Mail 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package user
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import (
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"fmt"
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"github.com/ProtonMail/gluon/imap"
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"github.com/ProtonMail/go-proton-api"
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"github.com/ProtonMail/gopenpgp/v2/crypto"
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"github.com/ProtonMail/proton-bridge/v3/pkg/message"
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)
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type result[T any] struct {
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v T
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e error
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}
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func resOk[T any](v T) result[T] {
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return result[T]{v: v}
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}
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func resErr[T any](e error) result[T] {
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return result[T]{e: e}
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}
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func (r *result[T]) unwrap() T {
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if r.e != nil {
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panic(r.err)
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}
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return r.v
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}
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func (r *result[T]) unpack() (T, error) {
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return r.v, r.e
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}
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func (r *result[T]) err() error {
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return r.e
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}
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type buildRes struct {
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messageID string
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addressID string
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update result[*imap.MessageCreated]
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}
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func defaultJobOpts() message.JobOptions {
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return message.JobOptions{
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IgnoreDecryptionErrors: true, // Whether to ignore decryption errors and create a "custom message" instead.
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SanitizeDate: true, // Whether to replace all dates before 1970 with RFC822's birthdate.
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AddInternalID: true, // Whether to include MessageID as X-Pm-Internal-Id.
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AddExternalID: true, // Whether to include ExternalID as X-Pm-External-Id.
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AddMessageDate: true, // Whether to include message time as X-Pm-Date.
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AddMessageIDReference: true, // Whether to include the MessageID in References.
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}
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}
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func buildRFC822(apiLabels map[string]proton.Label, full proton.FullMessage, addrKR *crypto.KeyRing) *buildRes {
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var update result[*imap.MessageCreated]
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if literal, err := message.BuildRFC822(addrKR, full.Message, full.AttData, defaultJobOpts()); err != nil {
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update = resErr[*imap.MessageCreated](fmt.Errorf("failed to build RFC822 for message %s: %w", full.ID, err))
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} else if created, err := newMessageCreatedUpdate(apiLabels, full.MessageMetadata, literal); err != nil {
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update = resErr[*imap.MessageCreated](fmt.Errorf("failed to create IMAP update for message %s: %w", full.ID, err))
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} else {
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update = resOk(created)
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}
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return &buildRes{
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messageID: full.ID,
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addressID: full.AddressID,
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update: update,
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}
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}
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func newMessageCreatedUpdate(
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apiLabels map[string]proton.Label,
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message proton.MessageMetadata,
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literal []byte,
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) (*imap.MessageCreated, error) {
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parsedMessage, err := imap.NewParsedMessage(literal)
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if err != nil {
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return nil, err
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}
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return &imap.MessageCreated{
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Message: toIMAPMessage(message),
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Literal: literal,
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MailboxIDs: mapTo[string, imap.MailboxID](wantLabels(apiLabels, message.LabelIDs)),
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ParsedMessage: parsedMessage,
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}, nil
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}
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