mirror of
https://github.com/ProtonMail/proton-bridge.git
synced 2025-12-15 22:56:48 +00:00
92 lines
2.1 KiB
Go
92 lines
2.1 KiB
Go
// Copyright (c) 2020 Proton Technologies AG
|
|
//
|
|
// This file is part of ProtonMail Bridge.
|
|
//
|
|
// ProtonMail Bridge is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// ProtonMail Bridge is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
package transfer
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"io"
|
|
"os"
|
|
"strings"
|
|
)
|
|
|
|
type stringSet map[string]bool
|
|
|
|
const xGmailLabelsHeader = "X-Gmail-Labels"
|
|
|
|
func getGmailLabelsFromMboxFile(filePath string) (stringSet, error) {
|
|
f, err := os.Open(filePath) //nolint[gosec]
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return getGmailLabelsFromMboxReader(f)
|
|
}
|
|
|
|
func getGmailLabelsFromMboxReader(f io.Reader) (stringSet, error) {
|
|
allLabels := map[string]bool{}
|
|
|
|
r := bufio.NewReader(f)
|
|
for {
|
|
b, isPrefix, err := r.ReadLine()
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if isPrefix {
|
|
for !isPrefix {
|
|
_, isPrefix, err = r.ReadLine()
|
|
if err != nil {
|
|
break
|
|
}
|
|
}
|
|
continue
|
|
}
|
|
if bytes.HasPrefix(b, []byte(xGmailLabelsHeader)) {
|
|
for label := range getGmailLabelsFromValue(string(b)) {
|
|
allLabels[label] = true
|
|
}
|
|
}
|
|
}
|
|
|
|
return allLabels, nil
|
|
}
|
|
|
|
func getGmailLabelsFromMessage(body []byte) (stringSet, error) {
|
|
header, err := getMessageHeader(body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
labels := header.Get(xGmailLabelsHeader)
|
|
return getGmailLabelsFromValue(labels), nil
|
|
}
|
|
|
|
func getGmailLabelsFromValue(value string) stringSet {
|
|
value = strings.TrimPrefix(value, xGmailLabelsHeader+":")
|
|
labels := map[string]bool{}
|
|
for _, label := range strings.Split(value, ",") {
|
|
label = strings.TrimSpace(label)
|
|
if label == "" {
|
|
continue
|
|
}
|
|
labels[label] = true
|
|
}
|
|
return labels
|
|
}
|