feat: activity log backend foundation

internal/infrastructure/auditing/recorder.go

@@ -0,0 +1,57 @@
+package auditing
+
+import (
+	"RenewCMS/internal/domain/audit"
+	"context"
+	"log"
+	"time"
+)
+
+type Recorder struct {
+	repository audit.Repository
+	now        func() time.Time
+	logger     *log.Logger
+}
+
+var _ audit.Recorder = &Recorder{}
+
+func NewRecorder(repository audit.Repository, now func() time.Time, logger *log.Logger) *Recorder {
+	return &Recorder{repository, now, logger}
+}
+
+func (r *Recorder) Record(ctx context.Context, event audit.Event) {
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			r.logger.Printf("audit: writing the %s event panicked: %v", event.Action, recovered)
+		}
+	}()
+
+	event = r.complete(ctx, event).Truncated()
+	if err := event.Validate(); err != nil {
+		r.logger.Printf("audit: dropped the %s event: %v", event.Action, err)
+		return
+	}
+	if _, err := r.repository.Append(event); err != nil {
+		r.logger.Printf("audit: failed to write the %s event: %v", event.Action, err)
+	}
+}
+
+func (r *Recorder) complete(ctx context.Context, event audit.Event) audit.Event {
+	origin, _ := audit.OriginFrom(ctx)
+	if event.Actor.Type == "" {
+		event.Actor = origin.Actor
+	}
+	if event.Source == "" {
+		event.Source = origin.Source
+	}
+	if event.IP == nil && origin.IP != "" {
+		ip := origin.IP
+		event.IP = &ip
+	}
+	if event.UserAgent == nil && origin.UserAgent != "" {
+		userAgent := origin.UserAgent
+		event.UserAgent = &userAgent
+	}
+	event.CreatedAt = r.now().UTC()
+	return event
+}