Update prune.py

backend/open_webui/routers/prune.py

@@ -7,6 +7,7 @@ import re
 import sqlite3
 from typing import Optional, Set, Union
 from pathlib import Path
+from abc import ABC, abstractmethod
 
 from fastapi import APIRouter, Depends, HTTPException, status
 from pydantic import BaseModel
@@ -84,6 +85,276 @@ class JSONFileIDExtractor:
         return validated_ids
 
 
+class VectorDatabaseCleaner(ABC):
+    """
+    Abstract base class for vector database cleanup operations.
+    
+    This interface defines the contract that all vector database implementations
+    must follow. Community contributors can implement support for new vector
+    databases by extending this class.
+    
+    Supported operations:
+    - Count orphaned collections (for dry-run preview)
+    - Cleanup orphaned collections (actual deletion)  
+    - Delete individual collections by name
+    """
+    
+    @abstractmethod
+    def count_orphaned_collections(self, active_file_ids: Set[str], active_kb_ids: Set[str]) -> int:
+        """
+        Count how many orphaned vector collections would be deleted.
+        
+        Args:
+            active_file_ids: Set of file IDs that are still referenced
+            active_kb_ids: Set of knowledge base IDs that are still active
+            
+        Returns:
+            Number of orphaned collections that would be deleted
+        """
+        pass
+    
+    @abstractmethod
+    def cleanup_orphaned_collections(self, active_file_ids: Set[str], active_kb_ids: Set[str]) -> int:
+        """
+        Actually delete orphaned vector collections.
+        
+        Args:
+            active_file_ids: Set of file IDs that are still referenced  
+            active_kb_ids: Set of knowledge base IDs that are still active
+            
+        Returns:
+            Number of collections that were actually deleted
+        """
+        pass
+    
+    @abstractmethod
+    def delete_collection(self, collection_name: str) -> bool:
+        """
+        Delete a specific vector collection by name.
+        
+        Args:
+            collection_name: Name of the collection to delete
+            
+        Returns:
+            True if deletion was successful, False otherwise
+        """
+        pass
+
+
+class ChromaDatabaseCleaner(VectorDatabaseCleaner):
+    """
+    ChromaDB-specific implementation of vector database cleanup.
+    
+    Handles ChromaDB's specific storage structure including:
+    - SQLite metadata database (chroma.sqlite3)
+    - Physical vector storage directories
+    - Collection name to UUID mapping
+    - Segment-based storage architecture
+    """
+    
+    def __init__(self):
+        self.vector_dir = Path(CACHE_DIR).parent / "vector_db"
+        self.chroma_db_path = self.vector_dir / "chroma.sqlite3"
+    
+    def count_orphaned_collections(self, active_file_ids: Set[str], active_kb_ids: Set[str]) -> int:
+        """Count orphaned ChromaDB collections for preview."""
+        if not self.chroma_db_path.exists():
+            return 0
+            
+        expected_collections = self._build_expected_collections(active_file_ids, active_kb_ids)
+        uuid_to_collection = self._get_collection_mappings()
+        
+        count = 0
+        try:
+            for collection_dir in self.vector_dir.iterdir():
+                if not collection_dir.is_dir() or collection_dir.name.startswith("."):
+                    continue
+                    
+                dir_uuid = collection_dir.name
+                collection_name = uuid_to_collection.get(dir_uuid)
+                
+                if collection_name is None or collection_name not in expected_collections:
+                    count += 1
+        except Exception as e:
+            log.debug(f"Error counting orphaned ChromaDB collections: {e}")
+            
+        return count
+    
+    def cleanup_orphaned_collections(self, active_file_ids: Set[str], active_kb_ids: Set[str]) -> int:
+        """Actually delete orphaned ChromaDB collections."""
+        if not self.chroma_db_path.exists():
+            return 0
+            
+        expected_collections = self._build_expected_collections(active_file_ids, active_kb_ids)
+        uuid_to_collection = self._get_collection_mappings()
+        
+        deleted_count = 0
+        
+        try:
+            for collection_dir in self.vector_dir.iterdir():
+                if not collection_dir.is_dir() or collection_dir.name.startswith("."):
+                    continue
+                    
+                dir_uuid = collection_dir.name
+                collection_name = uuid_to_collection.get(dir_uuid)
+                
+                # Delete if no corresponding collection name or collection is not expected
+                if collection_name is None:
+                    try:
+                        shutil.rmtree(collection_dir)
+                        deleted_count += 1
+                        log.debug(f"Deleted orphaned ChromaDB directory: {dir_uuid}")
+                    except Exception as e:
+                        log.error(f"Failed to delete orphaned directory {dir_uuid}: {e}")
+                        
+                elif collection_name not in expected_collections:
+                    try:
+                        shutil.rmtree(collection_dir)
+                        deleted_count += 1
+                        log.debug(f"Deleted orphaned ChromaDB collection: {collection_name}")
+                    except Exception as e:
+                        log.error(f"Failed to delete collection directory {dir_uuid}: {e}")
+                        
+        except Exception as e:
+            log.error(f"Error cleaning ChromaDB collections: {e}")
+            
+        if deleted_count > 0:
+            log.info(f"Deleted {deleted_count} orphaned ChromaDB collections")
+            
+        return deleted_count
+    
+    def delete_collection(self, collection_name: str) -> bool:
+        """Delete a specific ChromaDB collection by name."""
+        try:
+            # Attempt to delete via ChromaDB client first
+            try:
+                VECTOR_DB_CLIENT.delete_collection(collection_name=collection_name)
+                log.debug(f"Deleted ChromaDB collection via client: {collection_name}")
+            except Exception as e:
+                log.debug(f"Collection {collection_name} may not exist in ChromaDB: {e}")
+            
+            # Also clean up physical directory if it exists
+            # Note: ChromaDB uses UUID directories, so we'd need to map collection name to UUID
+            # For now, let the cleanup_orphaned_collections method handle physical cleanup
+            return True
+            
+        except Exception as e:
+            log.error(f"Error deleting ChromaDB collection {collection_name}: {e}")
+            return False
+    
+    def _build_expected_collections(self, active_file_ids: Set[str], active_kb_ids: Set[str]) -> Set[str]:
+        """Build set of collection names that should exist."""
+        expected_collections = set()
+        
+        # File collections use "file-{id}" pattern
+        for file_id in active_file_ids:
+            expected_collections.add(f"file-{file_id}")
+            
+        # Knowledge base collections use the KB ID directly
+        for kb_id in active_kb_ids:
+            expected_collections.add(kb_id)
+            
+        return expected_collections
+    
+    def _get_collection_mappings(self) -> dict:
+        """Get mapping from ChromaDB directory UUID to collection name."""
+        uuid_to_collection = {}
+        
+        try:
+            with sqlite3.connect(str(self.chroma_db_path)) as conn:
+                # First, get collection ID to name mapping
+                collection_id_to_name = {}
+                cursor = conn.execute("SELECT id, name FROM collections")
+                for collection_id, collection_name in cursor.fetchall():
+                    collection_id_to_name[collection_id] = collection_name
+                
+                # Then, get segment ID to collection mapping (segments are the directory UUIDs)
+                cursor = conn.execute("SELECT id, collection FROM segments WHERE scope = 'VECTOR'")
+                for segment_id, collection_id in cursor.fetchall():
+                    if collection_id in collection_id_to_name:
+                        collection_name = collection_id_to_name[collection_id]
+                        uuid_to_collection[segment_id] = collection_name
+                        
+            log.debug(f"Found {len(uuid_to_collection)} ChromaDB vector segments")
+            
+        except Exception as e:
+            log.error(f"Error reading ChromaDB metadata: {e}")
+            
+        return uuid_to_collection
+
+
+class PGVectorDatabaseCleaner(VectorDatabaseCleaner):
+    """
+    Placeholder implementation for PGVector database cleanup.
+    
+    This is a stub implementation that can be extended by the community
+    to support PGVector-specific cleanup operations.
+    
+    According to PR feedback, PGVector stores data in document_chunk table
+    and cleanup should involve finding rows with matching file IDs.
+    """
+    
+    def count_orphaned_collections(self, active_file_ids: Set[str], active_kb_ids: Set[str]) -> int:
+        """Count orphaned PGVector collections - to be implemented by community."""
+        log.debug("PGVector collection counting not yet implemented")
+        return 0
+    
+    def cleanup_orphaned_collections(self, active_file_ids: Set[str], active_kb_ids: Set[str]) -> int:
+        """Cleanup orphaned PGVector collections - to be implemented by community."""
+        log.debug("PGVector collection cleanup not yet implemented")
+        return 0
+    
+    def delete_collection(self, collection_name: str) -> bool:
+        """Delete PGVector collection - to be implemented by community."""
+        log.debug(f"PGVector collection deletion not yet implemented: {collection_name}")
+        return True
+
+
+class NoOpVectorDatabaseCleaner(VectorDatabaseCleaner):
+    """
+    No-operation implementation for unsupported vector databases.
+    
+    This implementation does nothing and is used when the configured
+    vector database is not supported by the cleanup system.
+    """
+    
+    def count_orphaned_collections(self, active_file_ids: Set[str], active_kb_ids: Set[str]) -> int:
+        """No orphaned collections to count for unsupported databases."""
+        return 0
+    
+    def cleanup_orphaned_collections(self, active_file_ids: Set[str], active_kb_ids: Set[str]) -> int:
+        """No collections to cleanup for unsupported databases."""
+        return 0
+    
+    def delete_collection(self, collection_name: str) -> bool:
+        """No collection to delete for unsupported databases."""
+        return True
+
+
+def get_vector_database_cleaner() -> VectorDatabaseCleaner:
+    """
+    Factory function to get the appropriate vector database cleaner.
+    
+    This function detects the configured vector database type and returns
+    the appropriate cleaner implementation. Community contributors can
+    extend this function to support additional vector databases.
+    
+    Returns:
+        VectorDatabaseCleaner: Appropriate implementation for the configured database
+    """
+    vector_db_type = VECTOR_DB.lower()
+    
+    if "chroma" in vector_db_type:
+        log.debug("Using ChromaDB cleaner")
+        return ChromaDatabaseCleaner()
+    elif "pgvector" in vector_db_type:
+        log.debug("Using PGVector cleaner (placeholder implementation)")
+        return PGVectorDatabaseCleaner()
+    else:
+        log.debug(f"No specific cleaner for vector database type: {VECTOR_DB}, using no-op cleaner")
+        return NoOpVectorDatabaseCleaner()
+
+
 class PruneDataForm(BaseModel):
     days: Optional[int] = None
     exempt_archived_chats: bool = False
@@ -284,55 +555,6 @@ def count_orphaned_uploads(active_file_ids: Set[str]) -> int:
     return count
 
 
-def count_orphaned_vector_collections(active_file_ids: Set[str], active_kb_ids: Set[str]) -> int:
-    """Count orphaned vector collections."""
-    if "chroma" not in VECTOR_DB.lower():
-        return 0
-        
-    vector_dir = Path(CACHE_DIR).parent / "vector_db"
-    if not vector_dir.exists():
-        return 0
-        
-    chroma_db_path = vector_dir / "chroma.sqlite3"
-    if not chroma_db_path.exists():
-        return 0
-        
-    expected_collections = set()
-    for file_id in active_file_ids:
-        expected_collections.add(f"file-{file_id}")
-    for kb_id in active_kb_ids:
-        expected_collections.add(kb_id)
-        
-    count = 0
-    try:
-        uuid_to_collection = {}
-        with sqlite3.connect(str(chroma_db_path)) as conn:
-            collection_id_to_name = {}
-            cursor = conn.execute("SELECT id, name FROM collections")
-            for collection_id, collection_name in cursor.fetchall():
-                collection_id_to_name[collection_id] = collection_name
-                
-            cursor = conn.execute("SELECT id, collection FROM segments WHERE scope = 'VECTOR'")
-            for segment_id, collection_id in cursor.fetchall():
-                if collection_id in collection_id_to_name:
-                    collection_name = collection_id_to_name[collection_id]
-                    uuid_to_collection[segment_id] = collection_name
-                    
-        for collection_dir in vector_dir.iterdir():
-            if not collection_dir.is_dir() or collection_dir.name.startswith("."):
-                continue
-                
-            dir_uuid = collection_dir.name
-            collection_name = uuid_to_collection.get(dir_uuid)
-            
-            if collection_name is None or collection_name not in expected_collections:
-                count += 1
-    except Exception as e:
-        log.debug(f"Error counting orphaned vector collections: {e}")
-        
-    return count
-
-
 def count_audio_cache_files(max_age_days: Optional[int]) -> int:
     """Count audio cache files that would be deleted."""
     if max_age_days is None:
@@ -469,29 +691,6 @@ def get_active_file_ids() -> Set[str]:
     return active_file_ids
 
 
-def safe_delete_vector_collection(collection_name: str) -> bool:
-    """
-    Safely delete a vector collection, handling both logical and physical cleanup.
-    """
-    try:
-        try:
-            VECTOR_DB_CLIENT.delete_collection(collection_name=collection_name)
-        except Exception as e:
-            log.debug(f"Collection {collection_name} may not exist in DB: {e}")
-
-        if "chroma" in VECTOR_DB.lower():
-            vector_dir = Path(CACHE_DIR).parent / "vector_db" / collection_name
-            if vector_dir.exists() and vector_dir.is_dir():
-                shutil.rmtree(vector_dir)
-                return True
-
-        return True
-
-    except Exception as e:
-        log.error(f"Error deleting vector collection {collection_name}: {e}")
-        return False
-
-
 def safe_delete_file_by_id(file_id: str) -> bool:
     """
     Safely delete a file record and its associated vector collection.
@@ -501,11 +700,12 @@ def safe_delete_file_by_id(file_id: str) -> bool:
         if not file_record:
             return True
 
+        # Use modular vector database cleaner
+        vector_cleaner = get_vector_database_cleaner()
         collection_name = f"file-{file_id}"
-        safe_delete_vector_collection(collection_name)
+        vector_cleaner.delete_collection(collection_name)
 
         Files.delete_file_by_id(file_id)
-
         return True
 
     except Exception as e:
@@ -560,97 +760,6 @@ def cleanup_orphaned_uploads(active_file_ids: Set[str]) -> None:
         log.info(f"Deleted {deleted_count} orphaned upload files")
 
 
-def cleanup_orphaned_vector_collections(
-    active_file_ids: Set[str], active_kb_ids: Set[str]
-) -> None:
-    """
-    Clean up orphaned vector collections by querying ChromaDB metadata.
-    """
-    if "chroma" not in VECTOR_DB.lower():
-        return
-
-    vector_dir = Path(CACHE_DIR).parent / "vector_db"
-    if not vector_dir.exists():
-        return
-
-    chroma_db_path = vector_dir / "chroma.sqlite3"
-    if not chroma_db_path.exists():
-        return
-
-    expected_collections = set()
-
-    for file_id in active_file_ids:
-        expected_collections.add(f"file-{file_id}")
-
-    for kb_id in active_kb_ids:
-        expected_collections.add(kb_id)
-
-    uuid_to_collection = {}
-    try:
-
-        with sqlite3.connect(str(chroma_db_path)) as conn:
-            collection_id_to_name = {}
-            cursor = conn.execute("SELECT id, name FROM collections")
-            rows = cursor.fetchall()
-
-            for row in rows:
-                collection_id, collection_name = row
-                collection_id_to_name[collection_id] = collection_name
-
-            cursor = conn.execute(
-                "SELECT id, collection FROM segments WHERE scope = 'VECTOR'"
-            )
-            segment_rows = cursor.fetchall()
-
-            for row in segment_rows:
-                segment_id, collection_id = row
-                if collection_id in collection_id_to_name:
-                    collection_name = collection_id_to_name[collection_id]
-                    uuid_to_collection[segment_id] = collection_name
-
-        log.info(
-            f"Found {len(uuid_to_collection)} vector segments in ChromaDB metadata"
-        )
-
-    except Exception as e:
-        log.error(f"Error reading ChromaDB metadata: {e}")
-        return
-
-    deleted_count = 0
-
-    try:
-        for collection_dir in vector_dir.iterdir():
-            if not collection_dir.is_dir():
-                continue
-
-            dir_uuid = collection_dir.name
-
-            if dir_uuid.startswith("."):
-                continue
-
-            collection_name = uuid_to_collection.get(dir_uuid)
-
-            if collection_name is None:
-                try:
-                    shutil.rmtree(collection_dir)
-                    deleted_count += 1
-                except Exception as e:
-                    log.error(f"Failed to delete orphaned directory {dir_uuid}: {e}")
-
-            elif collection_name not in expected_collections:
-                try:
-                    shutil.rmtree(collection_dir)
-                    deleted_count += 1
-                except Exception as e:
-                    log.error(f"Failed to delete collection directory {dir_uuid}: {e}")
-
-    except Exception as e:
-        log.error(f"Error cleaning vector collections: {e}")
-
-    if deleted_count > 0:
-        log.info(f"Deleted {deleted_count} orphaned vector collections")
-
-
 def delete_inactive_users(
     inactive_days: int, 
     exempt_admin: bool = True, 
@@ -755,6 +864,9 @@ async def prune_data(form_data: PruneDataForm, user=Depends(get_admin_user)):
     If dry_run=False, performs actual deletion and returns True on success.
     """
     try:
+        # Get vector database cleaner based on configuration
+        vector_cleaner = get_vector_database_cleaner()
+        
         if form_data.dry_run:
             log.info("Starting data pruning preview (dry run)")
             
@@ -786,7 +898,7 @@ async def prune_data(form_data: PruneDataForm, user=Depends(get_admin_user)):
                 orphaned_notes=orphaned_counts["notes"],
                 orphaned_folders=orphaned_counts["folders"],
                 orphaned_uploads=count_orphaned_uploads(active_file_ids),
-                orphaned_vector_collections=count_orphaned_vector_collections(active_file_ids, active_kb_ids),
+                orphaned_vector_collections=vector_cleaner.count_orphaned_collections(active_file_ids, active_kb_ids),
                 audio_cache_files=count_audio_cache_files(form_data.audio_cache_max_age_days)
             )
             
@@ -877,7 +989,7 @@ async def prune_data(form_data: PruneDataForm, user=Depends(get_admin_user)):
         if form_data.delete_orphaned_knowledge_bases:
             for kb in knowledge_bases:
                 if kb.user_id not in active_user_ids:
-                    if safe_delete_vector_collection(kb.id):
+                    if vector_cleaner.delete_collection(kb.id):
                         Knowledges.delete_knowledge_by_id(kb.id)
                         deleted_kbs += 1
 
@@ -984,7 +1096,9 @@ async def prune_data(form_data: PruneDataForm, user=Depends(get_admin_user)):
         final_active_kb_ids = {kb.id for kb in Knowledges.get_knowledge_bases()}
 
         cleanup_orphaned_uploads(final_active_file_ids)
-        cleanup_orphaned_vector_collections(final_active_file_ids, final_active_kb_ids)
+        
+        # Use modular vector database cleanup
+        vector_cleaner.cleanup_orphaned_collections(final_active_file_ids, final_active_kb_ids)
 
         # Stage 5: Audio cache cleanup
         log.info("Cleaning audio cache")
@@ -999,13 +1113,12 @@ async def prune_data(form_data: PruneDataForm, user=Depends(get_admin_user)):
         except Exception as e:
             log.error(f"Failed to vacuum main database: {e}")
 
-        if "chroma" in VECTOR_DB.lower():
+        # Vector database-specific optimization
-            chroma_db_path = Path(CACHE_DIR).parent / "vector_db" / "chroma.sqlite3"
+        if isinstance(vector_cleaner, ChromaDatabaseCleaner):
-            if chroma_db_path.exists():
             try:
-
+                with sqlite3.connect(str(vector_cleaner.chroma_db_path)) as conn:
-                    with sqlite3.connect(str(chroma_db_path)) as conn:
                     conn.execute("VACUUM")
+                    log.info("Vacuumed ChromaDB database")
             except Exception as e:
                 log.error(f"Failed to vacuum ChromaDB database: {e}")