feat(core): Support higher-order operators (#1984)

Co-authored-by: 谨欣 <echo.cmy@antgroup.com>

dbgpt/serve/file/api/schemas.py

@@ -1,7 +1,13 @@
 # Define your Pydantic schemas here
-from typing import Any, Dict
+from typing import Any, Dict, List, Optional
 
-from dbgpt._private.pydantic import BaseModel, ConfigDict, Field, model_to_dict
+from dbgpt._private.pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    model_to_dict,
+    model_validator,
+)
 
 from ..config import SERVE_APP_NAME_HUMP
 
@@ -41,3 +47,41 @@ class UploadFileResponse(BaseModel):
     def to_dict(self, **kwargs) -> Dict[str, Any]:
         """Convert the model to a dictionary"""
         return model_to_dict(self, **kwargs)
+
+
+class _BucketFilePair(BaseModel):
+    """Bucket file pair model"""
+
+    bucket: str = Field(..., title="The bucket of the file")
+    file_id: str = Field(..., title="The ID of the file")
+
+
+class FileMetadataBatchRequest(BaseModel):
+    """File metadata batch request model"""
+
+    uris: Optional[List[str]] = Field(None, title="The URIs of the files")
+    bucket_file_pairs: Optional[List[_BucketFilePair]] = Field(
+        None, title="The bucket file pairs"
+    )
+
+    @model_validator(mode="after")
+    def check_uris_or_bucket_file_pairs(self):
+        # Check if either uris or bucket_file_pairs is provided
+        if not (self.uris or self.bucket_file_pairs):
+            raise ValueError("Either uris or bucket_file_pairs must be provided")
+        # Check only one of uris or bucket_file_pairs is provided
+        if self.uris and self.bucket_file_pairs:
+            raise ValueError("Only one of uris or bucket_file_pairs can be provided")
+        return self
+
+
+class FileMetadataResponse(BaseModel):
+    """File metadata model"""
+
+    file_name: str = Field(..., title="The name of the file")
+    file_id: str = Field(..., title="The ID of the file")
+    bucket: str = Field(..., title="The bucket of the file")
+    uri: str = Field(..., title="The URI of the file")
+    file_size: int = Field(..., title="The size of the file")
+    user_name: Optional[str] = Field(None, title="The user name")
+    sys_code: Optional[str] = Field(None, title="The system code")