add:partial functionality

internal/services/storage.go

@@ -0,0 +1,52 @@
+package services
+
+import (
+	"fmt"
+	"strings"
+)
+
+// StorageService executes file operations against a single server's storage.
+type StorageService struct {
+	server Server
+}
+
+func NewStorageService(s Server) *StorageService {
+	return &StorageService{server: s}
+}
+
+// Check returns the list of files currently in the remote storage directory.
+func (s *StorageService) Check() ([]string, error) {
+	cmd := SSHCmd(s.server,
+		"find "+defaultStoragePath+" -type f -printf '%f\n' 2>/dev/null",
+	)
+	out, err := cmd.Output()
+	if err != nil {
+		return nil, fmt.Errorf("check failed: %w", err)
+	}
+	raw := strings.TrimSpace(string(out))
+	if raw == "" {
+		return []string{}, nil
+	}
+	return strings.Split(raw, "\n"), nil
+}
+
+// Send transfers one or more local files to the remote storage.
+// Multiple files are archived into a temp tarball first.
+func (s *StorageService) Send(localPaths []string) error {
+	// TODO: implement
+	return fmt.Errorf("send: not yet implemented")
+}
+
+// Get downloads one or more files from remote storage to destDir.
+// Multiple files are archived server-side, transferred, then extracted.
+func (s *StorageService) Get(remoteFiles []string, destDir string) error {
+	// TODO: implement
+	return fmt.Errorf("get: not yet implemented")
+}
+
+// Clean removes specific files from remote storage.
+// Pass a nil or empty slice to remove all files.
+func (s *StorageService) Clean(remoteFiles []string) error {
+	// TODO: implement
+	return fmt.Errorf("clean: not yet implemented")
+}