# Storage Implementation Checklist

## Core Services

### 1. Storage Service Layer
- [x] Create base `PlatformService` interface
  - [x] Define common methods for all platforms
  - [x] Add platform-specific method signatures
  - [x] Include error handling types
  - [x] Add migration support methods

- [x] Implement platform-specific services
  - [x] `AbsurdSqlDatabaseService` (web)
    - [x] Database initialization
    - [x] VFS setup with IndexedDB backend
    - [x] Connection management
    - [x] Operation queuing
  - [ ] `NativeSQLiteService` (iOS/Android) (planned)
    - [ ] SQLCipher integration
    - [ ] Native bridge setup
    - [ ] File system access
  - [ ] `ElectronSQLiteService` (planned)
    - [ ] Node SQLite integration
    - [ ] IPC communication
    - [ ] File system access

### 2. Migration Services
- [x] Implement basic migration support
  - [x] Dual-storage pattern (SQLite + Dexie)
  - [x] Basic data verification
  - [ ] Rollback procedures (planned)
  - [ ] Progress tracking (planned)
- [ ] Create `MigrationUI` components (planned)
  - [ ] Progress indicators
  - [ ] Error handling
  - [ ] User notifications
  - [ ] Manual triggers

### 3. Security Layer
- [x] Basic data integrity
- [ ] Implement `EncryptionService` (planned)
  - [ ] Key management
  - [ ] Encryption/decryption
  - [ ] Secure storage
- [ ] Add `BiometricService` (planned)
  - [ ] Platform detection
  - [ ] Authentication flow
  - [ ] Fallback mechanisms

## Platform-Specific Implementation

### Web Platform
- [x] Setup absurd-sql
  - [x] Install dependencies
    ```json
    {
      "@jlongster/sql.js": "^1.8.0",
      "absurd-sql": "^1.8.0"
    }
    ```
  - [x] Configure VFS with IndexedDB backend
  - [x] Setup worker threads
  - [x] Implement operation queuing
  - [x] Configure database pragmas
  
    ```sql
    PRAGMA journal_mode=MEMORY;
    PRAGMA synchronous=NORMAL;
    PRAGMA foreign_keys=ON;
    PRAGMA busy_timeout=5000;
    ```

- [x] Update build configuration
  - [x] Modify `vite.config.ts`
  - [x] Add worker configuration
  - [x] Update chunk splitting
  - [x] Configure asset handling

- [x] Implement IndexedDB backend
  - [x] Create database service
  - [x] Add operation queuing
  - [x] Handle initialization
  - [x] Implement atomic operations

### iOS Platform (Planned)
- [ ] Setup SQLCipher
  - [ ] Install pod dependencies
  - [ ] Configure encryption
  - [ ] Setup keychain access
  - [ ] Implement secure storage

- [ ] Update Capacitor config
  - [ ] Modify `capacitor.config.ts`
  - [ ] Add iOS permissions
  - [ ] Configure backup
  - [ ] Setup app groups

### Android Platform (Planned)
- [ ] Setup SQLCipher
  - [ ] Add Gradle dependencies
  - [ ] Configure encryption
  - [ ] Setup keystore
  - [ ] Implement secure storage

- [ ] Update Capacitor config
  - [ ] Modify `capacitor.config.ts`
  - [ ] Add Android permissions
  - [ ] Configure backup
  - [ ] Setup file provider

### Electron Platform (Planned)
- [ ] Setup Node SQLite
  - [ ] Install dependencies
  - [ ] Configure IPC
  - [ ] Setup file system access
  - [ ] Implement secure storage

- [ ] Update Electron config
  - [ ] Modify `electron.config.ts`
  - [ ] Add security policies
  - [ ] Configure file access
  - [ ] Setup auto-updates

## Data Models and Types

### 1. Database Schema
- [x] Define tables

  ```sql
  -- Accounts table
  CREATE TABLE accounts (
    did TEXT PRIMARY KEY,
    public_key_hex TEXT NOT NULL,
    created_at INTEGER NOT NULL,
    updated_at INTEGER NOT NULL
  );

  -- Settings table
  CREATE TABLE settings (
    key TEXT PRIMARY KEY,
    value TEXT NOT NULL,
    updated_at INTEGER NOT NULL
  );

  -- Contacts table
  CREATE TABLE contacts (
    id TEXT PRIMARY KEY,
    did TEXT NOT NULL,
    name TEXT,
    created_at INTEGER NOT NULL,
    updated_at INTEGER NOT NULL,
    FOREIGN KEY (did) REFERENCES accounts(did)
  );

  -- Indexes for performance
  CREATE INDEX idx_accounts_created_at ON accounts(created_at);
  CREATE INDEX idx_contacts_did ON contacts(did);
  CREATE INDEX idx_settings_updated_at ON settings(updated_at);
  ```

- [x] Create indexes
- [x] Define constraints
- [ ] Add triggers (planned)
- [ ] Setup migrations (planned)

### 2. Type Definitions

- [x] Create interfaces
  ```typescript
  interface Account {
    did: string;
    publicKeyHex: string;
    createdAt: number;
    updatedAt: number;
  }

  interface Setting {
    key: string;
    value: string;
    updatedAt: number;
  }

  interface Contact {
    id: string;
    did: string;
    name?: string;
    createdAt: number;
    updatedAt: number;
  }
  ```

- [x] Add validation
- [x] Create DTOs
- [x] Define enums
- [x] Add type guards

## UI Components

### 1. Migration UI (Planned)
- [ ] Create components
  - [ ] `MigrationProgress.vue`
  - [ ] `MigrationError.vue`
  - [ ] `MigrationSettings.vue`
  - [ ] `MigrationStatus.vue`

### 2. Settings UI (Planned)
- [ ] Update components
  - [ ] Add storage settings
  - [ ] Add migration controls
  - [ ] Add backup options
  - [ ] Add security settings

### 3. Error Handling UI (Planned)
- [ ] Create components
  - [ ] `StorageError.vue`
  - [ ] `QuotaExceeded.vue`
  - [ ] `MigrationFailed.vue`
  - [ ] `RecoveryOptions.vue`

## Testing

### 1. Unit Tests
- [x] Basic service tests
  - [x] Platform service tests
  - [x] Database operation tests
  - [ ] Security service tests (planned)
  - [ ] Platform detection tests (planned)

### 2. Integration Tests (Planned)
- [ ] Test migrations
  - [ ] Web platform tests
  - [ ] iOS platform tests
  - [ ] Android platform tests
  - [ ] Electron platform tests

### 3. E2E Tests (Planned)
- [ ] Test workflows
  - [ ] Account management
  - [ ] Settings management
  - [ ] Contact management
  - [ ] Migration process

## Documentation

### 1. Technical Documentation
- [x] Update architecture docs
- [x] Add API documentation
- [ ] Create migration guides (planned)
- [ ] Document security measures (planned)

### 2. User Documentation (Planned)
- [ ] Update user guides
- [ ] Add troubleshooting guides
- [ ] Create FAQ
- [ ] Document new features

## Deployment

### 1. Build Process
- [x] Update build scripts
- [x] Add platform-specific builds
- [ ] Configure CI/CD (planned)
- [ ] Setup automated testing (planned)

### 2. Release Process (Planned)
- [ ] Create release checklist
- [ ] Add version management
- [ ] Setup rollback procedures
- [ ] Configure monitoring

## Monitoring and Analytics (Planned)

### 1. Error Tracking
- [ ] Setup error logging
- [ ] Add performance monitoring
- [ ] Configure alerts
- [ ] Create dashboards

### 2. Usage Analytics
- [ ] Add storage metrics
- [ ] Track migration success
- [ ] Monitor performance
- [ ] Collect user feedback

## Security Audit (Planned)

### 1. Code Review
- [ ] Review encryption
- [ ] Check access controls
- [ ] Verify data handling
- [ ] Audit dependencies

### 2. Penetration Testing
- [ ] Test data access
- [ ] Verify encryption
- [ ] Check authentication
- [ ] Review permissions

## Success Criteria

### 1. Performance
- [x] Query response time < 100ms
- [x] Operation queuing for thread safety
- [x] Proper initialization handling
- [ ] Migration time < 5s per 1000 records (planned)
- [ ] Storage overhead < 10% (planned)
- [ ] Memory usage < 50MB (planned)

### 2. Reliability
- [x] Basic data integrity
- [x] Operation queuing
- [ ] Automatic recovery (planned)
- [ ] Backup verification (planned)
- [ ] Transaction atomicity (planned)
- [ ] Data consistency (planned)

### 3. Security
- [x] Basic data integrity
- [ ] AES-256 encryption (planned)
- [ ] Secure key storage (planned)
- [ ] Access control (planned)
- [ ] Audit logging (planned)

### 4. User Experience
- [x] Basic database operations
- [ ] Smooth migration (planned)
- [ ] Clear error messages (planned)
- [ ] Progress indicators (planned)
- [ ] Recovery options (planned)