# TASK-007A: LocalSQL Adapter - Progress

**Status:** ✅ Core Implementation Complete  
**Branch:** `feature/task-007a-localsql-adapter`  
**Started:** 2026-01-15  
**Last Updated:** 2026-01-15

---

## What Was Built

### Files Created

```
packages/noodl-runtime/src/api/adapters/
├── index.js                    # Adapter registry & exports
├── types.js                    # JSDoc type definitions
└── local-sql/
    ├── index.js                # Module exports
    ├── LocalSQLAdapter.js      # Main adapter (implements CloudStore interface)
    ├── QueryBuilder.js         # Parse-style query → SQL translation
    └── SchemaManager.js        # Table creation, migrations, export

packages/noodl-runtime/test/adapters/
└── QueryBuilder.test.js        # Unit tests for query builder
```

### Features Implemented

#### LocalSQLAdapter

- ✅ Implements same API as existing `CloudStore` class
- ✅ Uses `better-sqlite3` for local SQLite storage
- ✅ WAL mode for better concurrent access
- ✅ Event emission (create, save, delete, fetch)
- ✅ Auto-create tables on first access
- ✅ Auto-add columns for new fields

#### QueryBuilder

- ✅ Translates Parse-style queries to SQL
- ✅ All operators: `$eq`, `$ne`, `$gt`, `$gte`, `$lt`, `$lte`
- ✅ Collection operators: `$in`, `$nin`
- ✅ Existence: `$exists`
- ✅ Logical: `$and`, `$or`
- ✅ Relation support: `$relatedTo`
- ✅ Parse types: Date, Pointer
- ✅ SQL injection prevention
- ✅ Value serialization/deserialization

#### SchemaManager

- ✅ Create tables from Noodl schemas
- ✅ Add columns dynamically
- ✅ Junction tables for relations
- ✅ Export to PostgreSQL SQL
- ✅ Export to Supabase SQL (with RLS policies)
- ✅ JSON schema export/import
- ✅ Schema tracking in `_Schema` table

### CloudStore Interface Methods

| Method             | Status | Notes                   |
| ------------------ | ------ | ----------------------- |
| `query()`          | ✅     | Full Parse query syntax |
| `fetch()`          | ✅     | Single record by ID     |
| `create()`         | ✅     | With auto ID generation |
| `save()`           | ✅     | Update existing         |
| `delete()`         | ✅     | By objectId             |
| `count()`          | ✅     | With where filter       |
| `aggregate()`      | ✅     | sum, avg, max, min      |
| `distinct()`       | ✅     | Unique values           |
| `increment()`      | ✅     | Atomic increment        |
| `addRelation()`    | ✅     | Via junction tables     |
| `removeRelation()` | ✅     | Via junction tables     |
| `on()` / `off()`   | ✅     | Event subscription      |

---

## Testing Status

### Unit Tests

- ✅ QueryBuilder tests written (56 test cases)
- ⚠️ Runtime package has dependency issues (`terminal-link` missing)
- Tests need `npm install` at repo root to run

### Manual Testing

- 🔲 Pending - requires `better-sqlite3` installation

---

## What's Next

### Remaining for TASK-007A

1. Install missing test dependencies
2. Run and verify all tests pass
3. Manual integration test with real database

### Next Steps (TASK-007B: Backend Server)

- Express server implementation
- REST endpoints matching CloudStore API
- WebSocket for realtime updates
- IPC handlers for Electron main process

---

## Usage Example

```javascript
const { LocalSQLAdapter } = require('@noodl/runtime/src/api/adapters');

// Create adapter
const adapter = new LocalSQLAdapter('/path/to/database.db');
await adapter.connect();

// Create a record
adapter.create({
  collection: 'todos',
  data: { title: 'Learn Noodl', completed: false },
  success: (record) => console.log('Created:', record),
  error: (err) => console.error(err)
});

// Query records
adapter.query({
  collection: 'todos',
  where: { completed: { $eq: false } },
  sort: '-createdAt',
  limit: 10,
  success: (results) => console.log('Todos:', results),
  error: (err) => console.error(err)
});

// Export schema to PostgreSQL
const pgSQL = adapter.getSchemaManager().generatePostgresSQL();
console.log(pgSQL);
```

---

## Notes

- The adapter matches the callback-based API of CloudStore for compatibility
- `better-sqlite3` is required but not added to package.json yet
- Will be added when integrating with Backend Server (TASK-007B)
- ESLint warnings about `require()` are expected (CommonJS package)