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//! Database list and retrieval operations.
use rusqlite::Result as SqliteResult;
use super::{Error, Result, map_row_to_memory};
impl super::Database {
/// List memories for a project, ordered by creation time (newest first).
///
/// # Arguments
///
/// * `project_id` - Project identifier
/// * `limit` - Maximum number of results to return
/// * `memory_types` - Optional filter for memory types (None = no filter by type)
/// * `statuses` - Optional filter for lifecycle statuses (None = default to 'active')
///
/// # Errors
///
/// Returns error if the limit is invalid or the query fails.
pub fn list(
&self,
project_id: &str,
limit: usize,
memory_types: Option<&[&str]>,
statuses: Option<&[&str]>,
) -> Result<Vec<super::Memory>> {
let mut where_clauses = vec!["project_id = ?1".to_string()];
let mut param_index = 2usize;
// Status filter (default to active if None)
if let Some(statuses) = statuses {
if !statuses.is_empty() {
let placeholders: Vec<String> = (0..statuses.len())
.map(|i| format!("?{}", param_index + i))
.collect();
where_clauses.push(format!("status IN ({})", placeholders.join(", ")));
param_index += statuses.len();
}
} else {
where_clauses.push(format!("status = ?{}", param_index));
param_index += 1;
}
// Type filter (only if explicitly provided)
if let Some(types) = memory_types {
if !types.is_empty() {
let placeholders: Vec<String> = (0..types.len())
.map(|i| format!("?{}", param_index + i))
.collect();
where_clauses.push(format!("type IN ({})", placeholders.join(", ")));
param_index += types.len();
}
}
let where_clause = where_clauses.join(" AND ");
let query = format!(
"SELECT id, project_id, content, metadata, embedding, created_at, updated_at, type, status, superseded_by, retrieval_count, last_retrieved_at
FROM memories WHERE {} ORDER BY created_at DESC LIMIT ?{}",
where_clause, param_index
);
let mut stmt = self.conn.prepare(&query)?;
let mut params: Vec<&dyn rusqlite::ToSql> = vec![&project_id];
if let Some(statuses) = statuses {
if statuses.is_empty() {
// explicit empty = no status filter, but we didn't add a clause
} else {
for s in statuses {
params.push(s);
}
}
} else {
params.push(&"active");
}
if let Some(types) = memory_types {
for t in types {
params.push(t);
}
}
let limit_param = limit as i64;
params.push(&limit_param);
let memories: SqliteResult<Vec<super::Memory>> = stmt
.query_map(params.as_slice(), map_row_to_memory)?
.collect();
Ok(memories?)
}
/// List memories for a project created since a given timestamp.
///
/// Returns memories with `created_at > since_timestamp`, ordered by creation time (newest first).
/// The timestamp comparison is exclusive (does not include memories created exactly at the timestamp).
///
/// # Arguments
///
/// * `project_id` - Project identifier
/// * `since_timestamp` - RFC3339-formatted timestamp (exclusive lower bound)
/// * `limit` - Maximum number of results to return
/// * `memory_types` - Optional filter for memory types (None = no filter by type)
/// * `statuses` - Optional filter for lifecycle statuses (None = default to 'active')
///
/// # Errors
///
/// Returns error if:
/// - The timestamp is not valid RFC3339
/// - The limit is invalid
/// - The database query fails
///
/// # Examples
///
/// ```ignore
/// use chrono::Utc;
/// let one_hour_ago = (Utc::now() - chrono::Duration::hours(1)).to_rfc3339();
/// let recent = db.list_since("project", &one_hour_ago, 10, None, None)?;
/// ```
#[allow(dead_code)] // Public API for library consumers (e.g., kide)
pub fn list_since(
&self,
project_id: &str,
since_timestamp: &str,
limit: usize,
memory_types: Option<&[&str]>,
statuses: Option<&[&str]>,
) -> Result<Vec<super::Memory>> {
// Validate timestamp format by parsing it
let _parsed = chrono::DateTime::parse_from_rfc3339(since_timestamp)
.map_err(|e| Error::Sqlite(format!("Invalid RFC3339 timestamp: {}", e)))?;
let mut where_clauses = vec!["project_id = ?1".to_string(), "created_at > ?2".to_string()];
let mut param_index = 3usize;
// Status filter (default to active if None)
if let Some(statuses) = statuses {
if !statuses.is_empty() {
let placeholders: Vec<String> = (0..statuses.len())
.map(|i| format!("?{}", param_index + i))
.collect();
where_clauses.push(format!("status IN ({})", placeholders.join(", ")));
param_index += statuses.len();
}
} else {
where_clauses.push(format!("status = ?{}", param_index));
param_index += 1;
}
// Type filter (only if explicitly provided)
if let Some(types) = memory_types {
if !types.is_empty() {
let placeholders: Vec<String> = (0..types.len())
.map(|i| format!("?{}", param_index + i))
.collect();
where_clauses.push(format!("type IN ({})", placeholders.join(", ")));
param_index += types.len();
}
}
let where_clause = where_clauses.join(" AND ");
let query = format!(
"SELECT id, project_id, content, metadata, embedding, created_at, updated_at, type, status, superseded_by, retrieval_count, last_retrieved_at
FROM memories WHERE {} ORDER BY created_at DESC LIMIT ?{}",
where_clause, param_index
);
let mut stmt = self.conn.prepare(&query)?;
let mut params: Vec<&dyn rusqlite::ToSql> = vec![&project_id, &since_timestamp];
if let Some(statuses) = statuses {
if statuses.is_empty() {
// explicit empty = no status filter, but we didn't add a clause
} else {
for s in statuses {
params.push(s);
}
}
} else {
params.push(&"active");
}
if let Some(types) = memory_types {
for t in types {
params.push(t);
}
}
let limit_param = limit as i64;
params.push(&limit_param);
let memories: SqliteResult<Vec<super::Memory>> = stmt
.query_map(params.as_slice(), map_row_to_memory)?
.collect();
Ok(memories?)
}
/// Get multiple memories by their IDs.
///
/// Returns results in the same order as the input IDs. Missing IDs are represented as `None`.
///
/// # Arguments
///
/// * `ids` - Slice of memory IDs to retrieve
///
/// # Returns
///
/// Vector of `Option<Memory>` with the same length as `ids`. Each position corresponds
/// to the ID at the same index in the input. `Some(memory)` if found, `None` if not found.
///
/// # Errors
///
/// Returns error if any database query fails (individual not-found cases are handled via `None`).
///
/// # Examples
///
/// ```ignore
/// let results = db.get_many(&["id1", "id2", "missing-id"])?;
/// assert_eq!(results.len(), 3);
/// assert!(results[0].is_some()); // Found id1
/// assert!(results[1].is_some()); // Found id2
/// assert!(results[2].is_none()); // Missing ID
/// ```
#[allow(dead_code)] // Public API for library consumers (e.g., kide)
pub fn get_many(&self, ids: &[&str]) -> Result<Vec<Option<super::Memory>>> {
if ids.is_empty() {
return Ok(Vec::new());
}
let placeholders = ids
.iter()
.enumerate()
.map(|(i, _)| format!("?{}", i + 1))
.collect::<Vec<_>>()
.join(", ");
let query = format!(
r#"
SELECT id, project_id, content, metadata, embedding, created_at, updated_at, type, status, superseded_by, retrieval_count, last_retrieved_at
FROM memories
WHERE id IN ({})
"#,
placeholders
);
let mut stmt = self.conn.prepare(&query)?;
let params: Vec<&dyn rusqlite::ToSql> =
ids.iter().map(|id| id as &dyn rusqlite::ToSql).collect();
let rows: SqliteResult<Vec<(String, super::Memory)>> = stmt
.query_map(params.as_slice(), |row| {
let blob: Vec<u8> = row.get(4)?;
let embedding = super::blob_to_vec(&blob).map_err(|e| {
rusqlite::Error::FromSqlConversionFailure(
4,
rusqlite::types::Type::Blob,
Box::new(e),
)
})?;
Ok((
row.get::<_, String>(0)?,
super::Memory {
id: row.get(0)?,
project_id: row.get(1)?,
content: row.get(2)?,
metadata: row.get(3)?,
embedding,
similarity: None,
created_at: row.get(5)?,
updated_at: row.get(6)?,
memory_type: row.get(7)?,
status: row.get(8)?,
superseded_by: row.get(9)?,
retrieval_count: row.get(10)?,
last_retrieved_at: row.get(11)?,
},
))
})?
.collect();
let found_memories: std::collections::HashMap<String, super::Memory> =
rows?.into_iter().collect();
// Preserve input ordering
let results: Vec<Option<super::Memory>> = ids
.iter()
.map(|id| found_memories.get(*id).cloned())
.collect();
Ok(results)
}
/// Increment retrieval_count and set last_retrieved_at for given memory IDs.
///
/// Called by CLI handlers and MCP handlers after retrieving memories via search/get.
/// This method is NOT called internally by supersede or other operations that don't
/// represent user-initiated retrieval.
#[allow(dead_code)] // Library API: unused when MCP feature is disabled
pub fn touch_memories(&self, ids: &[&str]) -> Result<()> {
if ids.is_empty() {
return Ok(());
}
let now = chrono::Utc::now().to_rfc3339();
let placeholders: Vec<String> = (0..ids.len()).map(|i| format!("?{}", i + 2)).collect();
let sql = format!(
"UPDATE memories SET retrieval_count = retrieval_count + 1, last_retrieved_at = ?1 WHERE id IN ({})",
placeholders.join(", ")
);
let params: Vec<&dyn rusqlite::types::ToSql> =
std::iter::once(&now as &dyn rusqlite::types::ToSql)
.chain(ids.iter().map(|id| id as &dyn rusqlite::types::ToSql))
.collect();
self.conn.execute(&sql, params.as_slice())?;
Ok(())
}
}