Import/Export backend prep

internal/importexport/importexport.go

@@ -0,0 +1,113 @@
+// 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 importexport provides core functionality of Import/Export app.
+package importexport
+
+import (
+	"github.com/ProtonMail/proton-bridge/internal/transfer"
+	"github.com/ProtonMail/proton-bridge/internal/users"
+
+	"github.com/ProtonMail/proton-bridge/pkg/listener"
+	logrus "github.com/sirupsen/logrus"
+)
+
+var (
+	log = logrus.WithField("pkg", "importexport") //nolint[gochecknoglobals]
+)
+
+type ImportExport struct {
+	*users.Users
+
+	config        Configer
+	panicHandler  users.PanicHandler
+	clientManager users.ClientManager
+}
+
+func New(
+	config Configer,
+	panicHandler users.PanicHandler,
+	eventListener listener.Listener,
+	clientManager users.ClientManager,
+	credStorer users.CredentialsStorer,
+) *ImportExport {
+	u := users.New(config, panicHandler, eventListener, clientManager, credStorer, &storeFactory{}, false)
+	return &ImportExport{
+		Users: u,
+
+		config:        config,
+		panicHandler:  panicHandler,
+		clientManager: clientManager,
+	}
+}
+
+// GetLocalImporter returns transferrer from local EML or MBOX structure to ProtonMail account.
+func (ie *ImportExport) GetLocalImporter(address, path string) (*transfer.Transfer, error) {
+	source := transfer.NewLocalProvider(path)
+	target, err := ie.getPMAPIProvider(address)
+	if err != nil {
+		return nil, err
+	}
+	return transfer.New(ie.panicHandler, ie.config.GetTransferDir(), source, target)
+}
+
+// GetRemoteImporter returns transferrer from remote IMAP to ProtonMail account.
+func (ie *ImportExport) GetRemoteImporter(address, username, password, host, port string) (*transfer.Transfer, error) {
+	source, err := transfer.NewIMAPProvider(username, password, host, port)
+	if err != nil {
+		return nil, err
+	}
+	target, err := ie.getPMAPIProvider(address)
+	if err != nil {
+		return nil, err
+	}
+	return transfer.New(ie.panicHandler, ie.config.GetTransferDir(), source, target)
+}
+
+// GetEMLExporter returns transferrer from ProtonMail account to local EML structure.
+func (ie *ImportExport) GetEMLExporter(address, path string) (*transfer.Transfer, error) {
+	source, err := ie.getPMAPIProvider(address)
+	if err != nil {
+		return nil, err
+	}
+	target := transfer.NewEMLProvider(path)
+	return transfer.New(ie.panicHandler, ie.config.GetTransferDir(), source, target)
+}
+
+// GetMBOXExporter returns transferrer from ProtonMail account to local MBOX structure.
+func (ie *ImportExport) GetMBOXExporter(address, path string) (*transfer.Transfer, error) {
+	source, err := ie.getPMAPIProvider(address)
+	if err != nil {
+		return nil, err
+	}
+	target := transfer.NewMBOXProvider(path)
+	return transfer.New(ie.panicHandler, ie.config.GetTransferDir(), source, target)
+}
+
+func (ie *ImportExport) getPMAPIProvider(address string) (*transfer.PMAPIProvider, error) {
+	user, err := ie.Users.GetUser(address)
+	if err != nil {
+		return nil, err
+	}
+
+	addressID, err := user.GetAddressID(address)
+	if err != nil {
+		return nil, err
+	}
+
+	return transfer.NewPMAPIProvider(ie.clientManager, user.ID(), addressID)
+}