fix: add validator

Author: giancarloromeo

packages/models-library/src/models_library/api_schemas_webserver/storage.py

@@ -1,7 +1,7 @@
 from pathlib import Path
-from typing import Annotated
+from typing import Annotated, Final
 
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, BeforeValidator, Field
 
 from ..api_schemas_storage.storage_schemas import (
     DEFAULT_NUMBER_OF_PATHS_PER_PAGE,
@@ -11,6 +11,7 @@
 from ..rest_pagination import CursorQueryParameters
 from ._base import InputSchema
 
+MIN_NON_WILDCARD_CHARS: Final[int] = 3
 
 class StorageLocationPathParams(BaseModel):
     location_id: LocationID
@@ -44,5 +45,20 @@ class DataExportPost(InputSchema):
     paths: list[PathToExport]
 
 
+def validate_pattern_has_enough_characters(v: str) -> str:
+    non_wildcard_chars = len([c for c in v if c not in ("*", "?")])
+
+    if non_wildcard_chars < MIN_NON_WILDCARD_CHARS:
+        msg = f"Name pattern must contain at least {MIN_NON_WILDCARD_CHARS} non-wildcard characters (not * or ?), got {non_wildcard_chars}"
+        raise ValueError(msg)
+    return v
+
+
 class SearchBodyParams(InputSchema):
-    name_pattern: str
+    name_pattern: Annotated[
+         str,
+         BeforeValidator(validate_pattern_has_enough_characters),
+         Field(
+              description="Name pattern with wildcard support (* and ?). Minimum of {MIN_NON_WILDCARD_CHARS} non-wildcard characters required.",
+         )
+]