We build too many walls and not enough bridges

internal/frontend/autoconfig/applemail.go

@@ -0,0 +1,108 @@
+// 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/>.
+
+// +build darwin
+
+package autoconfig
+
+import (
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/ProtonMail/proton-bridge/internal/bridge"
+	"github.com/ProtonMail/proton-bridge/internal/frontend/types"
+	mobileconfig "github.com/ProtonMail/go-apple-mobileconfig"
+)
+
+func init() { //nolint[gochecknoinit]
+	available = append(available, &appleMail{})
+}
+
+type appleMail struct{}
+
+func (c *appleMail) Name() string {
+	return "Apple Mail"
+}
+
+func (c *appleMail) Configure(imapPort, smtpPort int, imapSSL, smtpSSL bool, user types.BridgeUser, addressIndex int) error { //nolint[funlen]
+	var addresses string
+	var displayName string
+
+	if user.IsCombinedAddressMode() {
+		displayName = user.GetPrimaryAddress()
+		addresses = strings.Join(user.GetAddresses(), ",")
+	} else {
+		for idx, address := range user.GetAddresses() {
+			if idx == addressIndex {
+				displayName = address
+				break
+			}
+		}
+		addresses = displayName
+	}
+
+	timestamp := strconv.FormatInt(time.Now().Unix(), 10)
+
+	mc := &mobileconfig.Config{
+		EmailAddress: addresses,
+		DisplayName:  displayName,
+		Identifier:   "protonmail " + displayName + timestamp,
+		Imap: &mobileconfig.Imap{
+			Hostname: bridge.Host,
+			Port:     imapPort,
+			Tls:      imapSSL,
+			Username: displayName,
+			Password: user.GetBridgePassword(),
+		},
+		Smtp: &mobileconfig.Smtp{
+			Hostname: bridge.Host,
+			Port:     smtpPort,
+			Tls:      smtpSSL,
+			Username: displayName,
+		},
+	}
+
+	dir, err := ioutil.TempDir("", "protonmail-autoconfig")
+	if err != nil {
+		return err
+	}
+
+	// Make sure the temporary file is deleted.
+	go (func() {
+		<-time.After(10 * time.Minute)
+		_ = os.RemoveAll(dir)
+	})()
+
+	// Make sure the file is only readable for the current user.
+	f, err := os.OpenFile(filepath.Join(dir, "protonmail.mobileconfig"), os.O_RDWR|os.O_CREATE, 0600)
+	if err != nil {
+		return err
+	}
+
+	if err := mc.WriteTo(f); err != nil {
+		_ = f.Close()
+		return err
+	}
+	_ = f.Close()
+
+	return exec.Command("open", f.Name()).Run() // nolint[gosec]
+}