Import/Export backend prep

internal/transfer/provider_local_source.go

@@ -0,0 +1,42 @@
+// 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 (
+	"sync"
+)
+
+// TransferTo exports messages based on rules to channel.
+func (p *LocalProvider) TransferTo(rules transferRules, progress *Progress, ch chan<- Message) {
+	log.Info("Started transfer from EML and MBOX to channel")
+	defer log.Info("Finished transfer from EML and MBOX to channel")
+
+	var wg sync.WaitGroup
+	wg.Add(2)
+
+	go func() {
+		defer wg.Done()
+		p.emlProvider.TransferTo(rules, progress, ch)
+	}()
+	go func() {
+		defer wg.Done()
+		p.mboxProvider.TransferTo(rules, progress, ch)
+	}()
+
+	wg.Wait()
+}