add some changes

backend/internal/object_storage/service.go

@@ -4,23 +4,24 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"sort"
 	"strings"
 	"time"
 
 	"github.com/atlasos/calypso/internal/common/logger"
+	madmin "github.com/minio/madmin-go/v3"
 	"github.com/minio/minio-go/v7"
 	"github.com/minio/minio-go/v7/pkg/credentials"
-	madmin "github.com/minio/madmin-go/v3"
 )
 
 // Service handles MinIO object storage operations
 type Service struct {
-	client     *minio.Client
+	client      *minio.Client
 	adminClient *madmin.AdminClient
-	logger     *logger.Logger
-	endpoint   string
-	accessKey  string
-	secretKey  string
+	logger      *logger.Logger
+	endpoint    string
+	accessKey   string
+	secretKey   string
 }
 
 // NewService creates a new MinIO service
@@ -54,8 +55,8 @@ func NewService(endpoint, accessKey, secretKey string, log *logger.Logger) (*Ser
 type Bucket struct {
 	Name         string    `json:"name"`
 	CreationDate time.Time `json:"creation_date"`
-	Size         int64     `json:"size"`         // Total size in bytes
-	Objects      int64     `json:"objects"`      // Number of objects
+	Size         int64     `json:"size"`          // Total size in bytes
+	Objects      int64     `json:"objects"`       // Number of objects
 	AccessPolicy string    `json:"access_policy"` // private, public-read, public-read-write
 }
 
@@ -153,7 +154,6 @@ func (s *Service) getBucketPolicy(ctx context.Context, bucketName string) string
 	return "private"
 }
 
-
 // CreateBucket creates a new bucket
 func (s *Service) CreateBucket(ctx context.Context, bucketName string) error {
 	err := s.client.MakeBucket(ctx, bucketName, minio.MakeBucketOptions{})
@@ -177,6 +177,82 @@ func (s *Service) GetBucketStats(ctx context.Context, bucketName string) (*Bucke
 	return s.getBucketInfo(ctx, bucketName)
 }
 
+// Object represents a MinIO object (file or folder)
+type Object struct {
+	Name         string    `json:"name"`
+	Key          string    `json:"key"`  // Full path/key
+	Size         int64     `json:"size"` // Size in bytes (0 for folders)
+	LastModified time.Time `json:"last_modified"`
+	IsDir        bool      `json:"is_dir"` // True if this is a folder/prefix
+	ETag         string    `json:"etag,omitempty"`
+}
+
+// ListObjects lists objects in a bucket with optional prefix (folder path)
+func (s *Service) ListObjects(ctx context.Context, bucketName, prefix string) ([]*Object, error) {
+	// Ensure prefix ends with / if it's not empty and doesn't already end with /
+	if prefix != "" && !strings.HasSuffix(prefix, "/") {
+		prefix += "/"
+	}
+
+	// List objects with prefix
+	objectCh := s.client.ListObjects(ctx, bucketName, minio.ListObjectsOptions{
+		Prefix:    prefix,
+		Recursive: false, // Don't recurse, show folders as separate items
+	})
+
+	var objects []*Object
+	seenFolders := make(map[string]bool)
+
+	for object := range objectCh {
+		if object.Err != nil {
+			s.logger.Warn("Error listing object", "bucket", bucketName, "prefix", prefix, "error", object.Err)
+			continue
+		}
+
+		// Extract folder name from object key
+		relativeKey := strings.TrimPrefix(object.Key, prefix)
+
+		// Check if this is a folder (has / in relative path)
+		if strings.Contains(relativeKey, "/") {
+			// Extract folder name (first part before /)
+			folderName := strings.Split(relativeKey, "/")[0]
+			folderKey := prefix + folderName + "/"
+
+			// Only add folder once
+			if !seenFolders[folderKey] {
+				seenFolders[folderKey] = true
+				objects = append(objects, &Object{
+					Name:         folderName,
+					Key:          folderKey,
+					Size:         0,
+					LastModified: time.Time{},
+					IsDir:        true,
+				})
+			}
+		} else {
+			// This is a file in the current directory
+			objects = append(objects, &Object{
+				Name:         relativeKey,
+				Key:          object.Key,
+				Size:         object.Size,
+				LastModified: object.LastModified,
+				IsDir:        false,
+				ETag:         object.ETag,
+			})
+		}
+	}
+
+	// Sort: folders first, then files, both alphabetically
+	sort.Slice(objects, func(i, j int) bool {
+		if objects[i].IsDir != objects[j].IsDir {
+			return objects[i].IsDir // Folders first
+		}
+		return objects[i].Name < objects[j].Name
+	})
+
+	return objects, nil
+}
+
 // User represents a MinIO IAM user
 type User struct {
 	AccessKey string    `json:"access_key"`
@@ -229,11 +305,11 @@ func (s *Service) DeleteUser(ctx context.Context, accessKey string) error {
 
 // ServiceAccount represents a MinIO service account (access key)
 type ServiceAccount struct {
-	AccessKey    string    `json:"access_key"`
-	SecretKey    string    `json:"secret_key,omitempty"` // Only returned on creation
-	ParentUser   string    `json:"parent_user"`
-	Expiration   time.Time `json:"expiration,omitempty"`
-	CreatedAt    time.Time `json:"created_at"`
+	AccessKey  string    `json:"access_key"`
+	SecretKey  string    `json:"secret_key,omitempty"` // Only returned on creation
+	ParentUser string    `json:"parent_user"`
+	Expiration time.Time `json:"expiration,omitempty"`
+	CreatedAt  time.Time `json:"created_at"`
 }
 
 // ListServiceAccounts lists all service accounts in MinIO