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| class SessionStore {
private db: Database;
private cache: Map<string, Session> = new Map();
constructor(dbPath: string) {
this.db = new Database(dbPath);
this.initSchema();
}
private initSchema(): void {
this.db.exec(`
CREATE TABLE IF NOT EXISTS sessions (
id TEXT PRIMARY KEY,
name TEXT,
status TEXT,
created_at TEXT,
updated_at TEXT,
context TEXT,
config TEXT,
metadata TEXT,
stats TEXT
)
`);
this.db.exec(`
CREATE TABLE IF NOT EXISTS messages (
id TEXT PRIMARY KEY,
session_id TEXT,
role TEXT,
content TEXT,
timestamp TEXT,
tool_calls TEXT,
tool_results TEXT,
metadata TEXT,
FOREIGN KEY (session_id) REFERENCES sessions(id)
)
`);
this.db.exec(`
CREATE INDEX IF NOT EXISTS idx_messages_session
ON messages(session_id, timestamp)
`);
}
async create(session: Session): Promise<void> {
await this.db.run(`
INSERT INTO sessions (
id, name, status, created_at, updated_at,
context, config, metadata, stats
) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
`, [
session.id,
session.name,
session.status,
session.createdAt.toISOString(),
session.updatedAt.toISOString(),
JSON.stringify(session.context),
JSON.stringify(session.config),
JSON.stringify(session.metadata),
JSON.stringify(session.stats),
]);
this.cache.set(session.id, session);
}
async get(sessionId: string): Promise<Session | null> {
const cached = this.cache.get(sessionId);
if (cached) {
return cached;
}
const sessionRow = await this.db.get(
'SELECT * FROM sessions WHERE id = ?',
[sessionId]
);
if (!sessionRow) {
return null;
}
const messages = await this.getMessages(sessionId);
const session: Session = {
id: sessionRow.id,
name: sessionRow.name,
status: sessionRow.status,
createdAt: new Date(sessionRow.created_at),
updatedAt: new Date(sessionRow.updated_at),
context: JSON.parse(sessionRow.context),
config: JSON.parse(sessionRow.config),
metadata: JSON.parse(sessionRow.metadata),
stats: JSON.parse(sessionRow.stats),
messages,
};
this.cache.set(sessionId, session);
return session;
}
async update(session: Session): Promise<void> {
session.updatedAt = new Date();
await this.db.run(`
UPDATE sessions SET
name = ?,
status = ?,
updated_at = ?,
context = ?,
config = ?,
metadata = ?,
stats = ?
WHERE id = ?
`, [
session.name,
session.status,
session.updatedAt.toISOString(),
JSON.stringify(session.context),
JSON.stringify(session.config),
JSON.stringify(session.metadata),
JSON.stringify(session.stats),
session.id,
]);
this.cache.set(session.id, session);
}
async addMessage(sessionId: string, message: Message): Promise<void> {
await this.db.run(`
INSERT INTO messages (
id, session_id, role, content, timestamp,
tool_calls, tool_results, metadata
) VALUES (?, ?, ?, ?, ?, ?, ?, ?)
`, [
message.id,
sessionId,
message.role,
message.content,
message.timestamp.toISOString(),
JSON.stringify(message.toolCalls),
JSON.stringify(message.toolResults),
JSON.stringify(message.metadata),
]);
await this.db.run(`
UPDATE sessions SET updated_at = ? WHERE id = ?
`, [new Date().toISOString(), sessionId]);
const session = this.cache.get(sessionId);
if (session) {
session.messages.push(message);
session.stats.messageCount++;
}
}
private async getMessages(sessionId: string): Promise<Message[]> {
const rows = await this.db.all(
'SELECT * FROM messages WHERE session_id = ? ORDER BY timestamp ASC',
[sessionId]
);
return rows.map(row => ({
id: row.id,
role: row.role,
content: row.content,
timestamp: new Date(row.timestamp),
toolCalls: JSON.parse(row.tool_calls || '[]'),
toolResults: JSON.parse(row.tool_results || '[]'),
metadata: JSON.parse(row.metadata || '{}'),
}));
}
async list(filter?: SessionFilter): Promise<SessionSummary[]> {
let query = `
SELECT
id, name, status, created_at, updated_at,
stats
FROM sessions
`;
const params: any[] = [];
const conditions: string[] = [];
if (filter?.status) {
conditions.push('status = ?');
params.push(filter.status);
}
if (filter?.search) {
conditions.push('name LIKE ?');
params.push(`%${filter.search}%`);
}
if (filter?.startTime) {
conditions.push('created_at >= ?');
params.push(filter.startTime.toISOString());
}
if (conditions.length > 0) {
query += ' WHERE ' + conditions.join(' AND ');
}
query += ' ORDER BY updated_at DESC';
if (filter?.limit) {
query += ` LIMIT ${filter.limit}`;
}
const rows = await this.db.all(query, params);
return rows.map(row => ({
id: row.id,
name: row.name,
status: row.status,
createdAt: new Date(row.created_at),
updatedAt: new Date(row.updated_at),
messageCount: JSON.parse(row.stats).messageCount,
}));
}
async delete(sessionId: string): Promise<void> {
await this.db.run('DELETE FROM messages WHERE session_id = ?', [sessionId]);
await this.db.run('DELETE FROM sessions WHERE id = ?', [sessionId]);
this.cache.delete(sessionId);
}
}
interface SessionSummary {
id: string;
name: string;
status: string;
createdAt: Date;
updatedAt: Date;
messageCount: number;
}
interface SessionFilter {
status?: string;
search?: string;
startTime?: Date;
endTime?: Date;
limit?: number;
}
|