Add lifecycle event source to audit log tags (#17248)

cmd/bucket-lifecycle-audit.go

@@ -0,0 +1,88 @@
+// Copyright (c) 2023 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// 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, 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 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 <http://www.gnu.org/licenses/>.
+
+package cmd
+
+import "github.com/minio/minio/internal/bucket/lifecycle"
+
+//go:generate stringer -type lcEventSrc -trimprefix lcEventSrc_ $GOFILE
+type lcEventSrc uint8
+
+//revive:disable:var-naming Underscores is used here to indicate where common prefix ends and the enumeration name begins
+const (
+	lcEventSrc_None lcEventSrc = iota
+	lcEventSrc_Scanner
+	lcEventSrc_Decom
+	lcEventSrc_Rebal
+	lcEventSrc_s3HeadObject
+	lcEventSrc_s3GetObject
+	lcEventSrc_s3ListObjects
+	lcEventSrc_s3PutObject
+	lcEventSrc_s3CopyObject
+	lcEventSrc_s3CompleteMultipartUpload
+)
+
+//revive:enable:var-naming
+type lcAuditEvent struct {
+	lifecycle.Event
+	source lcEventSrc
+}
+
+func (lae lcAuditEvent) Tags() map[string]interface{} {
+	event := lae.Event
+	src := lae.source
+	const (
+		ilmSrc                     = "ilm-src"
+		ilmAction                  = "ilm-action"
+		ilmDue                     = "ilm-due"
+		ilmRuleID                  = "ilm-rule-id"
+		ilmTier                    = "ilm-tier"
+		ilmNewerNoncurrentVersions = "ilm-newer-noncurrent-versions"
+		ilmNoncurrentDays          = "ilm-noncurrent-days"
+	)
+	tags := make(map[string]interface{}, 5)
+	if src > lcEventSrc_None {
+		tags[ilmSrc] = src.String()
+	}
+	tags[ilmAction] = event.Action.String()
+	tags[ilmRuleID] = event.RuleID
+
+	if !event.Due.IsZero() {
+		tags[ilmDue] = event.Due
+	}
+
+	// rule with Transition/NoncurrentVersionTransition in effect
+	if event.StorageClass != "" {
+		tags[ilmTier] = event.StorageClass
+	}
+
+	// rule with NewernoncurrentVersions in effect
+	if event.NewerNoncurrentVersions > 0 {
+		tags[ilmNewerNoncurrentVersions] = event.NewerNoncurrentVersions
+	}
+	if event.NoncurrentDays > 0 {
+		tags[ilmNoncurrentDays] = event.NoncurrentDays
+	}
+	return tags
+}
+
+func newLifecycleAuditEvent(src lcEventSrc, event lifecycle.Event) lcAuditEvent {
+	return lcAuditEvent{
+		Event:  event,
+		source: src,
+	}
+}