Import/Export metrics

internal/importexport/importexport.go

@@ -120,7 +120,7 @@ func (ie *ImportExport) GetLocalImporter(address, path string) (*transfer.Transf
 	if err != nil {
 		return nil, err
 	}
-	return transfer.New(ie.panicHandler, ie.config.GetTransferDir(), source, target)
+	return transfer.New(ie.panicHandler, newImportMetricsManager(ie), ie.config.GetTransferDir(), source, target)
 }
 
 // GetRemoteImporter returns transferrer from remote IMAP to ProtonMail account.
@@ -133,7 +133,7 @@ func (ie *ImportExport) GetRemoteImporter(address, username, password, host, por
 	if err != nil {
 		return nil, err
 	}
-	return transfer.New(ie.panicHandler, ie.config.GetTransferDir(), source, target)
+	return transfer.New(ie.panicHandler, newImportMetricsManager(ie), ie.config.GetTransferDir(), source, target)
 }
 
 // GetEMLExporter returns transferrer from ProtonMail account to local EML structure.
@@ -143,7 +143,7 @@ func (ie *ImportExport) GetEMLExporter(address, path string) (*transfer.Transfer
 		return nil, err
 	}
 	target := transfer.NewEMLProvider(path)
-	return transfer.New(ie.panicHandler, ie.config.GetTransferDir(), source, target)
+	return transfer.New(ie.panicHandler, newExportMetricsManager(ie), ie.config.GetTransferDir(), source, target)
 }
 
 // GetMBOXExporter returns transferrer from ProtonMail account to local MBOX structure.
@@ -153,7 +153,7 @@ func (ie *ImportExport) GetMBOXExporter(address, path string) (*transfer.Transfe
 		return nil, err
 	}
 	target := transfer.NewMBOXProvider(path)
-	return transfer.New(ie.panicHandler, ie.config.GetTransferDir(), source, target)
+	return transfer.New(ie.panicHandler, newExportMetricsManager(ie), ie.config.GetTransferDir(), source, target)
 }
 
 func (ie *ImportExport) getPMAPIProvider(address string) (*transfer.PMAPIProvider, error) {

internal/importexport/metrics.go

@@ -0,0 +1,64 @@
+// 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
+
+import (
+	"strconv"
+
+	"github.com/ProtonMail/proton-bridge/internal/metrics"
+)
+
+type metricsManager struct {
+	ie       *ImportExport
+	category metrics.Category
+}
+
+func newImportMetricsManager(ie *ImportExport) *metricsManager {
+	return &metricsManager{
+		ie:       ie,
+		category: metrics.Import,
+	}
+}
+
+func newExportMetricsManager(ie *ImportExport) *metricsManager {
+	return &metricsManager{
+		ie:       ie,
+		category: metrics.Export,
+	}
+}
+
+func (m *metricsManager) Load(numberOfMailboxes int) {
+	label := strconv.Itoa(numberOfMailboxes)
+	m.ie.SendMetric(metrics.New(m.category, metrics.TransferLoad, metrics.Label(label)))
+}
+
+func (m *metricsManager) Start() {
+	m.ie.SendMetric(metrics.New(m.category, metrics.TransferStart, metrics.NoLabel))
+}
+
+func (m *metricsManager) Complete() {
+	m.ie.SendMetric(metrics.New(m.category, metrics.TransferComplete, metrics.NoLabel))
+}
+
+func (m *metricsManager) Cancel() {
+	m.ie.SendMetric(metrics.New(m.category, metrics.TransferCancel, metrics.NoLabel))
+}
+
+func (m *metricsManager) Fail() {
+	m.ie.SendMetric(metrics.New(m.category, metrics.TransferFail, metrics.NoLabel))
+}