refactor: make cypher query optional (#1418)

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## Description
Make Cypher search optional

## Type of Change
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- [ ] Bug fix (non-breaking change that fixes an issue)
- [ ] New feature (non-breaking change that adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [ ] Code refactoring
- [ ] Performance improvement
- [x] Other (please specify):
Security upgrade

## Changes Made
Made cypher search optional for security reasons

## Testing
Tried running cypher queries with feature turned on and off

## Screenshots/Videos (if applicable)
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## Pre-submission Checklist
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- [ ] **I have tested my changes thoroughly before submitting this PR**
- [ ] **This PR contains minimal changes necessary to address the
issue/feature**
- [ ] My code follows the project's coding standards and style
guidelines
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have added necessary documentation (if applicable)
- [ ] All new and existing tests pass
- [ ] I have searched existing PRs to ensure this change hasn't been
submitted already
- [ ] I have linked any relevant issues in the description
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## Related Issues
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#issue_number" -->

## Additional Notes
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## DCO Affirmation
I affirm that all code in every commit of this pull request conforms to
the terms of the Topoteretes Developer Certificate of Origin.

.env.template

@@ -121,6 +121,9 @@ ACCEPT_LOCAL_FILE_PATH=True
 # This protects against Server Side Request Forgery when proper infrastructure is not in place.
 ALLOW_HTTP_REQUESTS=True
 
+# When set to false don't allow cypher search to be used in Cognee.
+ALLOW_CYPHER_QUERY=True
+
 # When set to False errors during data processing will be returned as info but not raised to allow handling of faulty documents
 RAISE_INCREMENTAL_LOADING_ERRORS=True
 

cognee/modules/search/methods/get_search_type_tools.py

@@ -1,3 +1,4 @@
+import os
 from typing import Callable, List, Optional, Type
 
 from cognee.modules.engine.models.node_set import NodeSet
@@ -160,6 +161,12 @@ async def get_search_type_tools(
     if query_type is SearchType.FEELING_LUCKY:
         query_type = await select_search_type(query_text)
 
+    if (
+        query_type in [SearchType.CYPHER, SearchType.NATURAL_LANGUAGE]
+        and os.getenv("ALLOW_CYPHER_QUERY", "true").lower() == "false"
+    ):
+        raise UnsupportedSearchTypeError("Cypher query search types are disabled.")
+
     search_type_tools = search_tasks.get(query_type)
 
     if not search_type_tools: