# Adapters

Database adapters provide persistent storage capabilities for SONA agents. They handle memory storage, relationship tracking, and knowledge management across different database backends.

## Implementation Notes:

Each adapter optimizes these methods for their specific database backend:

* **MongoDB**: Uses aggregation pipelines for vector operations
* **PostgreSQL**: Leverages pgvector extension
* **SQLite**: Implements BLOB storage for vectors
* **Qdrant**: Optimizes with HNSW indexing
* **Supabase**: Adds real-time capabilities

All adapters provide

```typescript
interface IDatabaseAdapter {
    // Memory Management
    createMemory(memory: Memory, tableName: string): Promise<void>;
    getMemories(params: { roomId: UUID; count?: number }): Promise<Memory[]>;
    searchMemories(params: SearchParams): Promise<Memory[]>;
    removeMemory(memoryId: UUID): Promise<void>;
    
    // Account & Room Management
    createAccount(account: Account): Promise<boolean>;
    getAccountById(userId: UUID): Promise<Account>;
    createRoom(roomId?: UUID): Promise<UUID>;
    getRoom(roomId: UUID): Promise<UUID>;
    
    // Participant Management
    addParticipant(userId: UUID, roomId: UUID): Promise<boolean>;
    getParticipantsForRoom(roomId: UUID): Promise<UUID[]>;
    
    // Knowledge Management
    createKnowledge(knowledge: RAGKnowledgeItem): Promise<void>;
    searchKnowledge(params: SearchParams): Promise<RAGKnowledgeItem[]>;
    
    // Goal Management
    createGoal(goal: Goal): Promise<void>;
    updateGoalStatus(params: { goalId: UUID; status: GoalStatus }): Promise<void>;
}
```

## Adapter Implementaion:

```typescript
// MongoDB
import { MongoDBAdapter } from '@sona/adapter-mongodb';
const mongoAdapter = new MongoDBAdapter({
    uri: process.env.MONGODB_URI,
    dbName: process.env.MONGODB_DB_NAME
});

// PostgreSQL
import { PostgresAdapter } from '@sona/adapter-postgres';
const pgAdapter = new PostgresAdapter({
    connectionString: process.env.POSTGRES_URI
});

// SQLite
import { SqliteDatabaseAdapter } from '@sona/adapter-sqlite';
const sqliteAdapter = new SqliteDatabaseAdapter('path/to/database.db');

// Supabase
import { SupabaseAdapter } from '@sona/adapter-supabase';
const supabaseAdapter = new SupabaseAdapter({
    url: process.env.SUPABASE_URL,
    apiKey: process.env.SUPABASE_API_KEY
});
```


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