Adding CGREvent

utils/cgrevent.go

@@ -0,0 +1,91 @@
+/*
+Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
+Copyright (C) ITsysCOM GmbH
+
+This program 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.
+
+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 PURPOev.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>
+*/
+
+package utils
+
+import (
+	"fmt"
+	"time"
+)
+
+// CGREvent is a generic event processed by CGR services
+type CGREvent struct {
+	Tenant string
+	ID     string
+	Event  map[string]interface{}
+}
+
+func (ev *CGREvent) CheckMandatoryFields(fldNames []string) error {
+	for _, fldName := range fldNames {
+		if _, has := ev.Event[fldName]; !has {
+			return NewErrMandatoryIeMissing(fldName)
+		}
+	}
+	return nil
+}
+
+// AnswerTime returns the AnswerTime of CGREvent
+func (ev *CGREvent) FieldAsString(fldName string) (val string, err error) {
+	iface, has := ev.Event[fldName]
+	if !has {
+		return "", ErrNotFound
+	}
+	val, canCast := CastFieldIfToString(iface)
+	if !canCast {
+		return "", fmt.Errorf("cannot cast %s to string", fldName)
+	}
+	return val, nil
+}
+
+// FieldAsTime returns the a field as Time instance
+func (ev *CGREvent) FieldAsTime(fldName string, timezone string) (t time.Time, err error) {
+	iface, has := ev.Event[fldName]
+	if !has {
+		err = ErrNotFound
+		return
+	}
+	var canCast bool
+	if t, canCast = iface.(time.Time); canCast {
+		return
+	}
+	s, canCast := iface.(string)
+	if !canCast {
+		err = fmt.Errorf("cannot cast %s to string", fldName)
+		return
+	}
+	return ParseTimeDetectLayout(s, timezone)
+}
+
+// FieldAsTime returns the a field as Time instance
+func (ev *CGREvent) FieldAsDuration(fldName string) (d time.Duration, err error) {
+	iface, has := ev.Event[fldName]
+	if !has {
+		err = ErrNotFound
+		return
+	}
+	var canCast bool
+	if d, canCast = iface.(time.Duration); canCast {
+		return
+	}
+	s, canCast := iface.(string)
+	if !canCast {
+		err = fmt.Errorf("cannot cast %s to string", fldName)
+		return
+	}
+	return ParseDurationWithNanosecs(s)
+}