feat: add activity logs

local/service/activity_log.go

@@ -0,0 +1,62 @@
+package service
+
+import (
+	"acc-server-manager/local/model"
+	"acc-server-manager/local/repository"
+	"acc-server-manager/local/utl/logging"
+	"context"
+	"encoding/json"
+	"fmt"
+)
+
+type ActivityLogService struct {
+	repo *repository.ActivityLogRepository
+}
+
+func NewActivityLogService(repo *repository.ActivityLogRepository) *ActivityLogService {
+	return &ActivityLogService{repo: repo}
+}
+
+// Log persists an activity log entry. Errors are logged but not returned so
+// callers can treat this as fire-and-forget.
+func (s *ActivityLogService) Log(ctx context.Context, entry *model.ActivityLog) error {
+	if err := s.repo.Insert(ctx, entry); err != nil {
+		logging.Error("Failed to insert activity log: %v", err)
+		return err
+	}
+	return nil
+}
+
+func (s *ActivityLogService) GetAll(ctx context.Context, filter *model.ActivityLogFilter) (*[]model.ActivityLog, error) {
+	return s.repo.GetAll(ctx, filter)
+}
+
+// BuildConfigDetails produces a JSON string summarising which top-level keys
+// changed between oldJSON and newJSON.
+func BuildConfigDetails(file string, oldJSON, newJSON []byte) string {
+	var oldMap, newMap map[string]interface{}
+
+	if err := json.Unmarshal(oldJSON, &oldMap); err != nil {
+		oldMap = map[string]interface{}{}
+	}
+	if err := json.Unmarshal(newJSON, &newMap); err != nil {
+		newMap = map[string]interface{}{}
+	}
+
+	var changedKeys []string
+	for key, newVal := range newMap {
+		oldVal, exists := oldMap[key]
+		if !exists {
+			changedKeys = append(changedKeys, key)
+			continue
+		}
+		oldBytes, _ := json.Marshal(oldVal)
+		newBytes, _ := json.Marshal(newVal)
+		if string(oldBytes) != string(newBytes) {
+			changedKeys = append(changedKeys, key)
+		}
+	}
+
+	keysJSON, _ := json.Marshal(changedKeys)
+	return fmt.Sprintf(`{"file":%q,"changed_keys":%s}`, file, string(keysJSON))
+}