refactor: move eventmanager to common package

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

internal/common/eventscheduler.go

@@ -0,0 +1,43 @@
+// Copyright (C) 2019-2022  Nicola Murino
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package common
+
+import (
+	"time"
+
+	"github.com/robfig/cron/v3"
+
+	"github.com/drakkan/sftpgo/v2/internal/util"
+)
+
+var (
+	eventScheduler *cron.Cron
+)
+
+func stopEventScheduler() {
+	if eventScheduler != nil {
+		eventScheduler.Stop()
+		eventScheduler = nil
+	}
+}
+
+func startEventScheduler() {
+	stopEventScheduler()
+
+	eventScheduler = cron.New(cron.WithLocation(time.UTC))
+	_, err := eventScheduler.AddFunc("@every 10m", eventManager.loadRules)
+	util.PanicOnError(err)
+	eventScheduler.Start()
+}