box: Add searchoptions for BoxRetriever, documentation for BoxRetriever as agent tool (#26181)

Thank you for contributing to LangChain!

- [x] **PR title**: "package: description"
- Where "package" is whichever of langchain, community, core,
experimental, etc. is being modified. Use "docs: ..." for purely docs
changes, "templates: ..." for template changes, "infra: ..." for CI
changes.
  - Example: "community: add foobar LLM"


Added search options for BoxRetriever and added documentation to
demonstrate how to use BoxRetriever as an agent tool - @BoxPlatform


- [x] **Add tests and docs**: If you're adding a new integration, please
include
1. a test for the integration, preferably unit tests that do not rely on
network access,
2. an example notebook showing its use. It lives in
`docs/docs/integrations` directory.


- [x] **Lint and test**: Run `make format`, `make lint` and `make test`
from the root of the package(s) you've modified. See contribution
guidelines for more: https://python.langchain.com/docs/contributing/

Additional guidelines:
- Make sure optional dependencies are imported within a function.
- Please do not add dependencies to pyproject.toml files (even optional
ones) unless they are required for unit tests.
- Most PRs should not touch more than one package.
- Changes should be backwards compatible.
- If you are adding something to community, do not re-import it in
langchain.

If no one reviews your PR within a few days, please @-mention one of
baskaryan, efriis, eyurtsev, ccurme, vbarda, hwchase17.

libs/partners/box/langchain_box/__init__.py

@@ -2,7 +2,14 @@ from importlib import metadata
 
 from langchain_box.document_loaders import BoxLoader
 from langchain_box.retrievers import BoxRetriever
-from langchain_box.utilities import BoxAuth, BoxAuthType, _BoxAPIWrapper
+from langchain_box.utilities.box import (
+    BoxAuth,
+    BoxAuthType,
+    BoxSearchOptions,
+    DocumentFiles,
+    SearchTypeFilter,
+    _BoxAPIWrapper,
+)
 
 try:
     __version__ = metadata.version(__package__)
@@ -16,6 +23,9 @@ __all__ = [
     "BoxRetriever",
     "BoxAuth",
     "BoxAuthType",
+    "BoxSearchOptions",
+    "DocumentFiles",
+    "SearchTypeFilter",
     "_BoxAPIWrapper",
     "__version__",
 ]

libs/partners/box/langchain_box/retrievers/box.py

@@ -6,7 +6,7 @@ from langchain_core.retrievers import BaseRetriever
 from pydantic import ConfigDict, model_validator
 from typing_extensions import Self
 
-from langchain_box.utilities import BoxAuth, _BoxAPIWrapper
+from langchain_box.utilities import BoxAuth, BoxSearchOptions, _BoxAPIWrapper
 
 
 class BoxRetriever(BaseRetriever):
@@ -128,7 +128,10 @@ class BoxRetriever(BaseRetriever):
     """character_limit is an int that caps the number of characters to
        return per document."""
 
-    _box: Optional[_BoxAPIWrapper] = None
+    box_search_options: Optional[BoxSearchOptions] = None
+    """Search options to configure BoxRetriever to narrow search results."""
+
+    _box: Optional[_BoxAPIWrapper]
 
     model_config = ConfigDict(
         arbitrary_types_allowed=True,
@@ -150,6 +153,7 @@ class BoxRetriever(BaseRetriever):
             box_developer_token=self.box_developer_token,
             box_auth=self.box_auth,
             character_limit=self.character_limit,
+            box_search_options=self.box_search_options,
         )
 
         self._box = _box

libs/partners/box/langchain_box/utilities/__init__.py

@@ -1,5 +1,19 @@
 """Box API Utilities."""
 
-from langchain_box.utilities.box import BoxAuth, BoxAuthType, _BoxAPIWrapper
+from langchain_box.utilities.box import (
+    BoxAuth,
+    BoxAuthType,
+    BoxSearchOptions,
+    DocumentFiles,
+    SearchTypeFilter,
+    _BoxAPIWrapper,
+)
 
-__all__ = ["BoxAuth", "BoxAuthType", "_BoxAPIWrapper"]
+__all__ = [
+    "BoxAuth",
+    "BoxAuthType",
+    "BoxSearchOptions",
+    "DocumentFiles",
+    "SearchTypeFilter",
+    "_BoxAPIWrapper",
+]

libs/partners/box/langchain_box/utilities/box.py

@@ -470,6 +470,128 @@ class BoxAuth(BaseModel):
         return self._box_client
 
 
+class SearchTypeFilter(Enum):
+    """SearchTypeFilter.
+
+    Enum to limit the what we search.
+    """
+
+    NAME = "name"
+    """The name of the item, as defined by its ``name`` field."""
+
+    DESCRIPTION = "description"
+    """The description of the item, as defined by its ``description`` field."""
+
+    FILE_CONTENT = "file_content"
+    """The actual content of the file."""
+
+    COMMENTS = "comments"
+    """The content of any of the comments on a file or folder."""
+
+    TAGS = "tags"
+    """Any tags that are applied to an item, as defined by its ``tags`` field."""
+
+
+class BoxSearchOptions(BaseModel):
+    ancestor_folder_ids: Optional[List[str]] = None
+    """Limits the search results to items within the given list of folders, 
+       defined as a comma separated lists of folder IDs."""
+
+    search_type_filter: Optional[List[SearchTypeFilter]] = None
+    """Limits the search results to any items that match the search query for a 
+       specific part of the file, for example the file description.
+
+       Content types are defined as a comma separated lists of Box recognized 
+       content types. The allowed content types are as follows. Default is all."""
+
+    created_date_range: Optional[List[str]] = None
+    """Limits the search results to any items created within a given date range.
+
+       Date ranges are defined as comma separated RFC3339 timestamps.
+
+       If the the start date is omitted (,2014-05-17T13:35:01-07:00) anything 
+       created before the end date will be returned.
+
+       If the end date is omitted (2014-05-15T13:35:01-07:00,) the current 
+       date will be used as the end date instead."""
+
+    file_extensions: Optional[List[DocumentFiles]] = None
+    """Limits the search results to any files that match any of the provided 
+        file extensions. This list is a comma-separated list of 
+        ``langchain_box.utilities.DocumentFiles`` entries"""
+
+    k: Optional[int] = 100
+    """Defines the maximum number of items to return. Defaults to 100, maximum 
+        is 200."""
+
+    size_range: Optional[List[int]] = None
+    """Limits the search results to any items with a size within a given file 
+        size range. This applied to files and folders.
+
+        Size ranges are defined as comma separated list of a lower and upper 
+        byte size limit (inclusive).
+
+        The upper and lower bound can be omitted to create open ranges."""
+
+    updated_date_range: Optional[List[str]] = None
+    """Limits the search results to any items updated within a given date range.
+
+        Date ranges are defined as comma separated RFC3339 timestamps.
+
+        If the start date is omitted (,2014-05-17T13:35:01-07:00) anything 
+        updated before the end date will be returned.
+
+        If the end date is omitted (2014-05-15T13:35:01-07:00,) the current 
+        date will be used as the end date instead."""
+
+    class Config:
+        arbitrary_types_allowed = True
+        use_enum_values = True
+        extra = "allow"
+
+    @model_validator(mode="after")
+    def validate_search_options(self) -> Self:
+        """Validate k is between 1 and 200"""
+        if self.k > 200 or self.k < 1:  # type: ignore[operator]
+            raise ValueError(
+                f"Invalid setting of k {self.k}. " "Value must be between 1 and 200."
+            )
+
+        """Validate created_date_range start date is before end date"""
+        if self.created_date_range:
+            if (
+                self.created_date_range[0] is None  # type: ignore[index]
+                or self.created_date_range[0] == ""  # type: ignore[index]
+                or self.created_date_range[1] is None  # type: ignore[index]
+                or self.created_date_range[1] == ""  # type: ignore[index]
+            ):
+                pass
+            else:
+                if (
+                    self.created_date_range[0]  # type: ignore[index]
+                    > self.created_date_range[1]  # type: ignore[index]
+                ):
+                    raise ValueError("Start date must be before end date.")
+
+        """Validate updated_date_range start date is before end date"""
+        if self.updated_date_range:
+            if (
+                self.updated_date_range[0] is None  # type: ignore[index]
+                or self.updated_date_range[0] == ""  # type: ignore[index]
+                or self.updated_date_range[1] is None  # type: ignore[index]
+                or self.updated_date_range[1] == ""  # type: ignore[index]
+            ):
+                pass
+            else:
+                if (
+                    self.updated_date_range[0]  # type: ignore[index]
+                    > self.updated_date_range[1]  # type: ignore[index]
+                ):
+                    raise ValueError("Start date must be before end date.")
+
+        return self
+
+
 class _BoxAPIWrapper(BaseModel):
     """Wrapper for Box API."""
 
@@ -485,7 +607,10 @@ class _BoxAPIWrapper(BaseModel):
     """character_limit is an int that caps the number of characters to
        return per document."""
 
-    _box: Optional[box_sdk_gen.BoxClient] = None
+    box_search_options: Optional[BoxSearchOptions] = None
+    """Search options to configure BoxRetriever to narrow search results."""
+
+    _box: Optional[box_sdk_gen.BoxClient]
 
     model_config = ConfigDict(
         arbitrary_types_allowed=True,
@@ -636,9 +761,25 @@ class _BoxAPIWrapper(BaseModel):
         files = []
 
         try:
-            results = self._box.search.search_for_content(  #  type: ignore[union-attr]
+            results = None
-                query=query, fields=["id", "type", "extension"]
+
-            )
+            if self.box_search_options is None:
+                results = self._box.search.search_for_content(  #  type: ignore[union-attr]
+                    query=query, fields=["id", "type", "extension"], type="file"
+                )
+            else:
+                results = self._box.search.search_for_content(  #  type: ignore[union-attr]
+                    query=query,
+                    fields=["id", "type", "extension"],
+                    type="file",
+                    ancestor_folder_ids=self.box_search_options.ancestor_folder_ids,  #  type: ignore[union-attr]
+                    content_types=self.box_search_options.search_type_filter,  #  type: ignore[union-attr]
+                    created_at_range=self.box_search_options.created_date_range,  #  type: ignore[union-attr]
+                    file_extensions=self.box_search_options.file_extensions,  #  type: ignore[union-attr]
+                    limit=self.box_search_options.k,  #  type: ignore[union-attr]
+                    size_range=self.box_search_options.size_range,  #  type: ignore[union-attr]
+                    updated_at_range=self.box_search_options.updated_date_range,  #  type: ignore[union-attr]
+                )
 
             if results.entries is None or len(results.entries) <= 0:
                 return None  #  type: ignore[return-value]

libs/partners/box/tests/unit_tests/retrievers/test_box_retriever.py

@@ -3,7 +3,13 @@ from langchain_core.documents import Document
 from pytest_mock import MockerFixture
 
 from langchain_box.retrievers import BoxRetriever
-from langchain_box.utilities import BoxAuth, BoxAuthType
+from langchain_box.utilities import (
+    BoxAuth,
+    BoxAuthType,
+    BoxSearchOptions,
+    DocumentFiles,
+    SearchTypeFilter,
+)
 
 
 # Test auth types
@@ -62,6 +68,44 @@ def test_search(mocker: MockerFixture) -> None:
     ]
 
 
+# test search options
+def test_search_options(mocker: MockerFixture) -> None:
+    mocker.patch(
+        "langchain_box.utilities._BoxAPIWrapper.search_box",
+        return_value=(
+            [
+                Document(
+                    page_content="Test file mode\ndocument contents",
+                    metadata={"title": "Testing Files"},
+                )
+            ]
+        ),
+    )
+
+    box_search_options = BoxSearchOptions(
+        ancestor_folder_ids=["box_folder_id"],
+        search_type_filter=[SearchTypeFilter.FILE_CONTENT],
+        created_date_range=["2023-01-01T00:00:00-07:00", "2024-08-01T00:00:00-07:00,"],
+        file_extensions=[DocumentFiles.DOCX, DocumentFiles.PDF],
+        k=200,
+        size_range=[1, 1000000],
+        updated_date_range=None,
+    )
+
+    retriever = BoxRetriever(  # type: ignore[call-arg]
+        box_developer_token="box_developer_token", box_search_options=box_search_options
+    )
+
+    documents = retriever.invoke("query")
+
+    assert documents == [
+        Document(
+            page_content="Test file mode\ndocument contents",
+            metadata={"title": "Testing Files"},
+        )
+    ]
+
+
 # test ai retrieval
 def test_ai(mocker: MockerFixture) -> None:
     mocker.patch(

libs/partners/box/tests/unit_tests/test_imports.py

@@ -5,6 +5,9 @@ EXPECTED_ALL = [
     "BoxRetriever",
     "BoxAuth",
     "BoxAuthType",
+    "BoxSearchOptions",
+    "DocumentFiles",
+    "SearchTypeFilter",
     "_BoxAPIWrapper",
     "__version__",
 ]