project_rag/relations/storage/
lance_store.rs

1//! LanceDB-based storage for code relationships.
2
3use anyhow::{Context, Result};
4use async_trait::async_trait;
5use std::path::PathBuf;
6use std::sync::Arc;
7use tokio::sync::RwLock;
8
9use super::{RelationsStats, RelationsStore};
10use crate::relations::types::{CallEdge, Definition, Reference};
11
12/// LanceDB-based relations store.
13///
14/// Stores definitions and references in separate LanceDB tables for efficient querying.
15pub struct LanceRelationsStore {
16    /// Path to the database directory
17    db_path: PathBuf,
18    /// Database connection (lazy initialized)
19    db: Arc<RwLock<Option<lancedb::Connection>>>,
20}
21
22impl LanceRelationsStore {
23    /// Create a new LanceDB relations store
24    pub async fn new(db_path: PathBuf) -> Result<Self> {
25        // Ensure directory exists
26        tokio::fs::create_dir_all(&db_path)
27            .await
28            .context("Failed to create relations database directory")?;
29
30        Ok(Self {
31            db_path,
32            db: Arc::new(RwLock::new(None)),
33        })
34    }
35
36    /// Get or create the database connection
37    async fn get_connection(&self) -> Result<lancedb::Connection> {
38        let mut db_guard = self.db.write().await;
39
40        if let Some(ref db) = *db_guard {
41            return Ok(db.clone());
42        }
43
44        let db = lancedb::connect(self.db_path.to_string_lossy().as_ref())
45            .execute()
46            .await
47            .context("Failed to connect to LanceDB")?;
48
49        *db_guard = Some(db.clone());
50        Ok(db)
51    }
52
53    /// Ensure definitions table exists
54    async fn ensure_definitions_table(&self) -> Result<()> {
55        let _db = self.get_connection().await?;
56        // Table will be created on first insert
57        // LanceDB creates tables lazily
58        Ok(())
59    }
60
61    /// Ensure references table exists
62    async fn ensure_references_table(&self) -> Result<()> {
63        let _db = self.get_connection().await?;
64        // Table will be created on first insert
65        Ok(())
66    }
67}
68
69#[async_trait]
70impl RelationsStore for LanceRelationsStore {
71    async fn store_definitions(
72        &self,
73        definitions: Vec<Definition>,
74        _root_path: &str,
75    ) -> Result<usize> {
76        if definitions.is_empty() {
77            return Ok(0);
78        }
79
80        self.ensure_definitions_table().await?;
81
82        // TODO: Implement actual LanceDB storage
83        // For now, just return the count
84        let count = definitions.len();
85
86        tracing::debug!("Stored {} definitions", count);
87        Ok(count)
88    }
89
90    async fn store_references(&self, references: Vec<Reference>, _root_path: &str) -> Result<usize> {
91        if references.is_empty() {
92            return Ok(0);
93        }
94
95        self.ensure_references_table().await?;
96
97        // TODO: Implement actual LanceDB storage
98        let count = references.len();
99
100        tracing::debug!("Stored {} references", count);
101        Ok(count)
102    }
103
104    async fn find_definition_at(
105        &self,
106        _file_path: &str,
107        _line: usize,
108        _column: usize,
109    ) -> Result<Option<Definition>> {
110        // TODO: Implement query
111        Ok(None)
112    }
113
114    async fn find_definitions_by_name(&self, _name: &str) -> Result<Vec<Definition>> {
115        // TODO: Implement query
116        Ok(Vec::new())
117    }
118
119    async fn find_references(&self, _target_symbol_id: &str) -> Result<Vec<Reference>> {
120        // TODO: Implement query
121        Ok(Vec::new())
122    }
123
124    async fn get_callers(&self, _symbol_id: &str) -> Result<Vec<CallEdge>> {
125        // TODO: Implement call graph query
126        Ok(Vec::new())
127    }
128
129    async fn get_callees(&self, _symbol_id: &str) -> Result<Vec<CallEdge>> {
130        // TODO: Implement call graph query
131        Ok(Vec::new())
132    }
133
134    async fn delete_by_file(&self, _file_path: &str) -> Result<usize> {
135        // TODO: Implement deletion
136        Ok(0)
137    }
138
139    async fn clear(&self) -> Result<()> {
140        // TODO: Drop and recreate tables
141        Ok(())
142    }
143
144    async fn get_stats(&self) -> Result<RelationsStats> {
145        // TODO: Query actual counts
146        Ok(RelationsStats::default())
147    }
148}
149
150#[cfg(test)]
151mod tests {
152    use super::*;
153    use tempfile::TempDir;
154
155    #[tokio::test]
156    async fn test_store_creation() {
157        let temp_dir = TempDir::new().unwrap();
158        let store = LanceRelationsStore::new(temp_dir.path().to_path_buf())
159            .await
160            .unwrap();
161
162        let stats = store.get_stats().await.unwrap();
163        assert_eq!(stats.definition_count, 0);
164    }
165
166    #[tokio::test]
167    async fn test_store_empty_definitions() {
168        let temp_dir = TempDir::new().unwrap();
169        let store = LanceRelationsStore::new(temp_dir.path().to_path_buf())
170            .await
171            .unwrap();
172
173        let count = store.store_definitions(Vec::new(), "/test").await.unwrap();
174        assert_eq!(count, 0);
175    }
176}
project_rag/relations/storage/lance_store.rs

project_rag/relations/storage/
lance_store.rs
