docs: Update migration documentation with fence definition and security checklist - Add comprehensive migration fence definition with clear boundaries - Update migration guide to reflect current Phase 2 status - Create security audit checklist for migration process - Update README with migration status and architecture details - Document migration fence enforcement and guidelines - Add security considerations and compliance requirements
This commit is contained in:
Matthew Raymer
@@ -4,6 +4,8 @@
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This document outlines the migration process from Dexie.js to absurd-sql for the TimeSafari app's storage implementation. The migration aims to provide a consistent SQLite-based storage solution across all platforms while maintaining data integrity and ensuring a smooth transition for users.
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**Current Status**: The migration is in **Phase 2** with a well-defined migration fence in place. Core settings and account data have been migrated, with contact migration in progress.
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## Migration Goals
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1. **Data Integrity**
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@@ -26,6 +28,17 @@ This document outlines the migration process from Dexie.js to absurd-sql for the
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- Minimal downtime
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- Automatic migration where possible
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## Migration Fence
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The migration is controlled by a **migration fence** that separates legacy Dexie code from the new SQLite implementation. See [Migration Fence Definition](./migration-fence-definition.md) for complete details.
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### Key Fence Components
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1. **Configuration Control**: `USE_DEXIE_DB = false` (default)
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2. **Service Layer**: All database operations go through `PlatformService`
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3. **Migration Tools**: Exclusive access to both databases during migration
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4. **Code Boundaries**: Clear separation between legacy and new code
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## Prerequisites
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1. **Backup Requirements**
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@@ -62,6 +75,26 @@ This document outlines the migration process from Dexie.js to absurd-sql for the
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- Android: Android 5+ with SQLite support
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- Electron: Latest version with SQLite support
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## Current Migration Status
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### ✅ Completed
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- **SQLite Database Service**: Fully implemented with absurd-sql
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- **Platform Service Layer**: Unified database interface
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- **Migration Tools**: Data comparison and transfer utilities
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- **Settings Migration**: Core user settings transferred
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- **Account Migration**: Identity and key management
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- **Schema Migration**: Complete table structure migration
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### 🔄 In Progress
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- **Contact Migration**: User contact data (via import interface)
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- **Data Verification**: Comprehensive integrity checks
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- **Performance Optimization**: Query optimization and indexing
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### 📋 Planned
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- **Code Cleanup**: Remove unused Dexie imports
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- **Documentation Updates**: Complete migration guides
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- **Testing**: Comprehensive migration testing
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## Migration Process
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### 1. Preparation
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@@ -72,70 +105,7 @@ import initSqlJs from '@jlongster/sql.js';
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import { SQLiteFS } from 'absurd-sql';
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import IndexedDBBackend from 'absurd-sql/dist/indexeddb-backend';
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export class MigrationService {
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private static instance: MigrationService;
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private backup: MigrationBackup | null = null;
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private sql: any = null;
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private db: any = null;
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async prepare(): Promise<void> {
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try {
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// 1. Check prerequisites
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await this.checkPrerequisites();
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// 2. Create backup
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this.backup = await this.createBackup();
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// 3. Verify backup integrity
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await this.verifyBackup();
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// 4. Initialize absurd-sql
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await this.initializeAbsurdSql();
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} catch (error) {
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throw new StorageError(
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'Migration preparation failed',
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StorageErrorCodes.MIGRATION_FAILED,
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error
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);
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}
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}
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private async initializeAbsurdSql(): Promise<void> {
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// Initialize SQL.js
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this.sql = await initSqlJs({
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locateFile: (file: string) => {
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return new URL(`/node_modules/@jlongster/sql.js/dist/${file}`, import.meta.url).href;
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}
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});
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// Setup SQLiteFS with IndexedDB backend
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const sqlFS = new SQLiteFS(this.sql.FS, new IndexedDBBackend());
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this.sql.register_for_idb(sqlFS);
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// Create and mount filesystem
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this.sql.FS.mkdir('/sql');
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this.sql.FS.mount(sqlFS, {}, '/sql');
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// Open database
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const path = '/sql/db.sqlite';
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if (typeof SharedArrayBuffer === 'undefined') {
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let stream = this.sql.FS.open(path, 'a+');
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await stream.node.contents.readIfFallback();
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this.sql.FS.close(stream);
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}
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this.db = new this.sql.Database(path, { filename: true });
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if (!this.db) {
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throw new StorageError(
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'Database initialization failed',
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StorageErrorCodes.INITIALIZATION_FAILED
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);
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}
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// Configure database
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await this.db.exec(`PRAGMA journal_mode=MEMORY;`);
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}
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class MigrationService {
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private async checkPrerequisites(): Promise<void> {
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// Check IndexedDB availability
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if (!window.indexedDB) {
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@@ -186,428 +156,259 @@ export class MigrationService {
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```typescript
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// src/services/storage/migration/DataMigration.ts
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export class DataMigration {
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async migrate(backup: MigrationBackup): Promise<void> {
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try {
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// 1. Create new database schema
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await this.createSchema();
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// 2. Migrate accounts
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await this.migrateAccounts(backup.accounts);
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// 3. Migrate settings
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await this.migrateSettings(backup.settings);
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// 4. Migrate contacts
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await this.migrateContacts(backup.contacts);
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// 5. Verify migration
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await this.verifyMigration(backup);
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} catch (error) {
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// 6. Handle failure
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await this.handleMigrationFailure(error, backup);
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}
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}
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class DataMigration {
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async migrateAccounts(): Promise<MigrationResult> {
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const result: MigrationResult = {
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success: true,
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accountsMigrated: 0,
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errors: [],
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warnings: []
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};
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private async migrateAccounts(accounts: Account[]): Promise<void> {
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// Use transaction for atomicity
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await this.db.exec('BEGIN TRANSACTION;');
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try {
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for (const account of accounts) {
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await this.db.run(`
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INSERT INTO accounts (did, public_key_hex, created_at, updated_at)
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VALUES (?, ?, ?, ?)
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`, [
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account.did,
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account.publicKeyHex,
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account.createdAt,
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account.updatedAt
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]);
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const dexieAccounts = await this.getDexieAccounts();
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for (const account of dexieAccounts) {
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try {
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await this.migrateAccount(account);
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result.accountsMigrated++;
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} catch (error) {
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result.errors.push(`Failed to migrate account ${account.did}: ${error}`);
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result.success = false;
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}
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}
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await this.db.exec('COMMIT;');
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} catch (error) {
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await this.db.exec('ROLLBACK;');
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throw error;
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result.errors.push(`Account migration failed: ${error}`);
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result.success = false;
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}
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return result;
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}
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private async verifyMigration(backup: MigrationBackup): Promise<void> {
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async migrateSettings(): Promise<MigrationResult> {
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const result: MigrationResult = {
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success: true,
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settingsMigrated: 0,
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errors: [],
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warnings: []
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};
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try {
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const dexieSettings = await this.getDexieSettings();
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for (const setting of dexieSettings) {
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try {
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await this.migrateSetting(setting);
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result.settingsMigrated++;
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} catch (error) {
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result.errors.push(`Failed to migrate setting ${setting.id}: ${error}`);
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result.success = false;
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}
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}
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} catch (error) {
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result.errors.push(`Settings migration failed: ${error}`);
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result.success = false;
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}
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return result;
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}
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async migrateContacts(): Promise<MigrationResult> {
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// Contact migration is handled through the contact import interface
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// This provides better user control and validation
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const result: MigrationResult = {
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success: true,
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contactsMigrated: 0,
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errors: [],
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warnings: []
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};
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try {
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const dexieContacts = await this.getDexieContacts();
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// Redirect to contact import view with pre-populated data
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await this.redirectToContactImport(dexieContacts);
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result.contactsMigrated = dexieContacts.length;
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} catch (error) {
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result.errors.push(`Contact migration failed: ${error}`);
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result.success = false;
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}
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return result;
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}
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}
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```
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### 3. Verification
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```typescript
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class MigrationVerification {
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async verifyMigration(dexieData: MigrationData): Promise<boolean> {
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// Verify account count
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const result = await this.db.exec('SELECT COUNT(*) as count FROM accounts');
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const accountCount = result[0].values[0][0];
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if (accountCount !== backup.accounts.length) {
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throw new StorageError(
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'Account count mismatch',
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StorageErrorCodes.VERIFICATION_FAILED
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);
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const accountResult = await this.sqliteDB.exec('SELECT COUNT(*) as count FROM accounts');
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const accountCount = accountResult[0].values[0][0];
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if (accountCount !== dexieData.accounts.length) {
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return false;
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}
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// Verify settings count
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const settingsResult = await this.sqliteDB.exec('SELECT COUNT(*) as count FROM settings');
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const settingsCount = settingsResult[0].values[0][0];
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if (settingsCount !== dexieData.settings.length) {
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return false;
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}
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// Verify data integrity
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await this.verifyDataIntegrity(backup);
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}
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}
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```
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### 3. Rollback Strategy
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```typescript
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// src/services/storage/migration/RollbackService.ts
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export class RollbackService {
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async rollback(backup: MigrationBackup): Promise<void> {
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try {
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// 1. Stop all database operations
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await this.stopDatabaseOperations();
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// 2. Restore from backup
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await this.restoreFromBackup(backup);
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// 3. Verify restoration
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await this.verifyRestoration(backup);
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// 4. Clean up absurd-sql
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await this.cleanupAbsurdSql();
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} catch (error) {
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throw new StorageError(
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'Rollback failed',
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StorageErrorCodes.ROLLBACK_FAILED,
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error
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for (const account of dexieData.accounts) {
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const result = await this.sqliteDB.exec(
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'SELECT * FROM accounts WHERE did = ?',
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[account.did]
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);
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const migratedAccount = result[0]?.values[0];
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if (!migratedAccount ||
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migratedAccount[1] !== account.publicKeyHex) {
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return false;
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}
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}
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}
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private async restoreFromBackup(backup: MigrationBackup): Promise<void> {
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const dexieDB = new Dexie('TimeSafariDB');
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// Restore accounts
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await dexieDB.accounts.bulkPut(backup.accounts);
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// Restore settings
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await dexieDB.settings.bulkPut(backup.settings);
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// Restore contacts
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await dexieDB.contacts.bulkPut(backup.contacts);
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return true;
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}
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}
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```
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## Migration UI
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## Using the Migration Interface
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```vue
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<!-- src/components/MigrationProgress.vue -->
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<template>
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<div class="migration-progress">
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<h2>Database Migration</h2>
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<div class="progress-container">
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<div class="progress-bar" :style="{ width: `${progress}%` }" />
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<div class="progress-text">{{ progress }}%</div>
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</div>
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<div class="status-message">{{ statusMessage }}</div>
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<div v-if="error" class="error-message">
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{{ error }}
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<button @click="retryMigration">Retry</button>
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</div>
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</div>
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</template>
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### Accessing Migration Tools
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<script setup lang="ts">
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import { ref, onMounted } from 'vue';
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import { MigrationService } from '@/services/storage/migration/MigrationService';
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1. Navigate to the **Account** page in the TimeSafari app
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2. Scroll down to find the **Database Migration** link
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3. Click the link to open the migration interface
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const progress = ref(0);
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const statusMessage = ref('Preparing migration...');
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const error = ref<string | null>(null);
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### Migration Steps
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const migrationService = MigrationService.getInstance();
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1. **Compare Databases**
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- Click "Compare Databases" to see differences
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- Review the comparison results
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- Identify data that needs migration
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async function startMigration() {
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try {
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// 1. Preparation
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statusMessage.value = 'Creating backup...';
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await migrationService.prepare();
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progress.value = 20;
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// 2. Data migration
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statusMessage.value = 'Migrating data...';
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await migrationService.migrate();
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progress.value = 80;
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// 3. Verification
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statusMessage.value = 'Verifying migration...';
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await migrationService.verify();
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progress.value = 100;
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statusMessage.value = 'Migration completed successfully!';
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} catch (err) {
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error.value = err instanceof Error ? err.message : 'Migration failed';
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statusMessage.value = 'Migration failed';
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}
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}
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2. **Migrate Settings**
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- Click "Migrate Settings" to transfer user settings
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- Verify settings are correctly transferred
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- Check application functionality
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async function retryMigration() {
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error.value = null;
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progress.value = 0;
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await startMigration();
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}
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3. **Migrate Contacts**
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- Click "Migrate Contacts" to open contact import
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- Review and confirm contact data
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- Complete the import process
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onMounted(() => {
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startMigration();
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});
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</script>
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4. **Verify Migration**
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- Run comparison again to verify completion
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- Test application functionality
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- Export backup data if needed
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<style scoped>
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.migration-progress {
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padding: 2rem;
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max-width: 600px;
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margin: 0 auto;
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}
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## Error Handling
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.progress-container {
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position: relative;
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height: 20px;
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background: #eee;
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border-radius: 10px;
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overflow: hidden;
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margin: 1rem 0;
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}
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### Common Issues
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.progress-bar {
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position: absolute;
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height: 100%;
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background: #4CAF50;
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transition: width 0.3s ease;
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}
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1. **Dexie Database Not Enabled**
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- **Error**: "Dexie database is not enabled"
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- **Solution**: Set `USE_DEXIE_DB = true` in `constants/app.ts` temporarily
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.progress-text {
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position: absolute;
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width: 100%;
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text-align: center;
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line-height: 20px;
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color: #000;
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}
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2. **Database Connection Issues**
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- **Error**: "Failed to retrieve data"
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- **Solution**: Check database initialization and permissions
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||||
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||||
.status-message {
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text-align: center;
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margin: 1rem 0;
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}
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3. **Migration Failures**
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- **Error**: "Migration failed: [specific error]"
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- **Solution**: Review error details and check data integrity
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||||
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.error-message {
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color: #f44336;
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text-align: center;
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margin: 1rem 0;
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}
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### Error Recovery
|
||||
|
||||
button {
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margin-top: 1rem;
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||||
padding: 0.5rem 1rem;
|
||||
background: #2196F3;
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color: white;
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border: none;
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border-radius: 4px;
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cursor: pointer;
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||||
}
|
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1. **Review** error messages carefully
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2. **Check** browser console for additional details
|
||||
3. **Verify** database connectivity and permissions
|
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4. **Retry** the operation if appropriate
|
||||
5. **Export** comparison data for manual review if needed
|
||||
|
||||
button:hover {
|
||||
background: #1976D2;
|
||||
}
|
||||
</style>
|
||||
```
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## Best Practices
|
||||
|
||||
### Before Migration
|
||||
|
||||
1. **Backup** your data if possible
|
||||
2. **Test** the migration on a small dataset first
|
||||
3. **Verify** that both databases are accessible
|
||||
4. **Review** the comparison results before migrating
|
||||
|
||||
### During Migration
|
||||
|
||||
1. **Don't** interrupt the migration process
|
||||
2. **Monitor** the progress and error messages
|
||||
3. **Note** any warnings or skipped records
|
||||
4. **Export** comparison data for reference
|
||||
|
||||
### After Migration
|
||||
|
||||
1. **Verify** that data was migrated correctly
|
||||
2. **Test** the application functionality
|
||||
3. **Disable** Dexie database (`USE_DEXIE_DB = false`)
|
||||
4. **Clean up** any temporary files or exports
|
||||
|
||||
## Performance Considerations
|
||||
|
||||
### 1. Migration Performance
|
||||
- Use transactions for bulk data transfer
|
||||
- Implement progress indicators
|
||||
- Process data in background when possible
|
||||
|
||||
### 2. Application Performance
|
||||
- Optimize SQLite queries
|
||||
- Maintain proper database indexes
|
||||
- Use efficient memory management
|
||||
|
||||
## Security Considerations
|
||||
|
||||
### 1. Data Protection
|
||||
- Maintain encryption standards across migration
|
||||
- Preserve user privacy during migration
|
||||
- Log all migration operations
|
||||
|
||||
### 2. Error Handling
|
||||
- Handle migration failures gracefully
|
||||
- Provide clear user messaging
|
||||
- Maintain rollback capabilities
|
||||
|
||||
## Testing Strategy
|
||||
|
||||
1. **Unit Tests**
|
||||
```typescript
|
||||
// src/services/storage/migration/__tests__/MigrationService.spec.ts
|
||||
describe('MigrationService', () => {
|
||||
it('should initialize absurd-sql correctly', async () => {
|
||||
const service = MigrationService.getInstance();
|
||||
await service.initializeAbsurdSql();
|
||||
|
||||
expect(service.isInitialized()).toBe(true);
|
||||
expect(service.getDatabase()).toBeDefined();
|
||||
});
|
||||
### 1. Migration Testing
|
||||
```typescript
|
||||
describe('Database Migration', () => {
|
||||
it('should migrate data without loss', async () => {
|
||||
// 1. Enable Dexie
|
||||
// 2. Create test data
|
||||
// 3. Run migration
|
||||
// 4. Verify data integrity
|
||||
// 5. Disable Dexie
|
||||
});
|
||||
});
|
||||
```
|
||||
|
||||
it('should create valid backup', async () => {
|
||||
const service = MigrationService.getInstance();
|
||||
const backup = await service.createBackup();
|
||||
|
||||
expect(backup).toBeDefined();
|
||||
expect(backup.accounts).toBeInstanceOf(Array);
|
||||
expect(backup.settings).toBeInstanceOf(Array);
|
||||
expect(backup.contacts).toBeInstanceOf(Array);
|
||||
});
|
||||
### 2. Application Testing
|
||||
```typescript
|
||||
describe('Feature with Database', () => {
|
||||
it('should work with SQLite only', async () => {
|
||||
// Test with USE_DEXIE_DB = false
|
||||
// Verify all operations use PlatformService
|
||||
});
|
||||
});
|
||||
```
|
||||
|
||||
it('should migrate data correctly', async () => {
|
||||
const service = MigrationService.getInstance();
|
||||
const backup = await service.createBackup();
|
||||
|
||||
await service.migrate(backup);
|
||||
|
||||
// Verify migration
|
||||
const accounts = await service.getMigratedAccounts();
|
||||
expect(accounts).toHaveLength(backup.accounts.length);
|
||||
});
|
||||
## Conclusion
|
||||
|
||||
it('should handle rollback correctly', async () => {
|
||||
const service = MigrationService.getInstance();
|
||||
const backup = await service.createBackup();
|
||||
|
||||
// Simulate failed migration
|
||||
await service.migrate(backup);
|
||||
await service.simulateFailure();
|
||||
|
||||
// Perform rollback
|
||||
await service.rollback(backup);
|
||||
|
||||
// Verify rollback
|
||||
const accounts = await service.getOriginalAccounts();
|
||||
expect(accounts).toHaveLength(backup.accounts.length);
|
||||
});
|
||||
});
|
||||
```
|
||||
The migration from Dexie to absurd-sql provides:
|
||||
- **Better Performance**: Improved query performance and storage efficiency
|
||||
- **Cross-Platform Consistency**: Unified database interface across platforms
|
||||
- **Enhanced Security**: Better encryption and access controls
|
||||
- **Future-Proof Architecture**: Modern SQLite-based storage system
|
||||
|
||||
2. **Integration Tests**
|
||||
```typescript
|
||||
// src/services/storage/migration/__tests__/integration/Migration.spec.ts
|
||||
describe('Migration Integration', () => {
|
||||
it('should handle concurrent access during migration', async () => {
|
||||
const service = MigrationService.getInstance();
|
||||
|
||||
// Start migration
|
||||
const migrationPromise = service.migrate();
|
||||
|
||||
// Simulate concurrent access
|
||||
const accessPromises = Array(5).fill(null).map(() =>
|
||||
service.getAccount('did:test:123')
|
||||
);
|
||||
|
||||
// Wait for all operations
|
||||
const [migrationResult, ...accessResults] = await Promise.allSettled([
|
||||
migrationPromise,
|
||||
...accessPromises
|
||||
]);
|
||||
|
||||
// Verify results
|
||||
expect(migrationResult.status).toBe('fulfilled');
|
||||
expect(accessResults.some(r => r.status === 'rejected')).toBe(true);
|
||||
});
|
||||
|
||||
it('should maintain data integrity during platform transition', async () => {
|
||||
const service = MigrationService.getInstance();
|
||||
|
||||
// Simulate platform change
|
||||
await service.simulatePlatformChange();
|
||||
|
||||
// Verify data
|
||||
const accounts = await service.getAllAccounts();
|
||||
const settings = await service.getAllSettings();
|
||||
const contacts = await service.getAllContacts();
|
||||
|
||||
expect(accounts).toBeDefined();
|
||||
expect(settings).toBeDefined();
|
||||
expect(contacts).toBeDefined();
|
||||
});
|
||||
});
|
||||
```
|
||||
|
||||
## Success Criteria
|
||||
|
||||
1. **Data Integrity**
|
||||
- [ ] All accounts migrated successfully
|
||||
- [ ] All settings preserved
|
||||
- [ ] All contacts transferred
|
||||
- [ ] No data corruption
|
||||
|
||||
2. **Performance**
|
||||
- [ ] Migration completes within acceptable time
|
||||
- [ ] No significant performance degradation
|
||||
- [ ] Efficient storage usage
|
||||
- [ ] Smooth user experience
|
||||
|
||||
3. **Security**
|
||||
- [ ] Encrypted data remains secure
|
||||
- [ ] Access controls maintained
|
||||
- [ ] No sensitive data exposure
|
||||
- [ ] Secure backup process
|
||||
|
||||
4. **User Experience**
|
||||
- [ ] Clear migration progress
|
||||
- [ ] Informative error messages
|
||||
- [ ] Automatic recovery from failures
|
||||
- [ ] No data loss
|
||||
|
||||
## Rollback Plan
|
||||
|
||||
1. **Automatic Rollback**
|
||||
- Triggered by migration failure
|
||||
- Restores from verified backup
|
||||
- Maintains data consistency
|
||||
- Logs rollback reason
|
||||
|
||||
2. **Manual Rollback**
|
||||
- Available through settings
|
||||
- Requires user confirmation
|
||||
- Preserves backup data
|
||||
- Provides rollback status
|
||||
|
||||
3. **Emergency Recovery**
|
||||
- Manual backup restoration
|
||||
- Database repair tools
|
||||
- Data recovery procedures
|
||||
- Support contact information
|
||||
|
||||
## Post-Migration
|
||||
|
||||
1. **Verification**
|
||||
- Data integrity checks
|
||||
- Performance monitoring
|
||||
- Error rate tracking
|
||||
- User feedback collection
|
||||
|
||||
2. **Cleanup**
|
||||
- Remove old database
|
||||
- Clear migration artifacts
|
||||
- Update application state
|
||||
- Archive backup data
|
||||
|
||||
3. **Monitoring**
|
||||
- Track migration success rate
|
||||
- Monitor performance metrics
|
||||
- Collect error reports
|
||||
- Gather user feedback
|
||||
|
||||
## Support
|
||||
|
||||
For assistance with migration:
|
||||
1. Check the troubleshooting guide
|
||||
2. Review error logs
|
||||
3. Contact support team
|
||||
4. Submit issue report
|
||||
|
||||
## Timeline
|
||||
|
||||
1. **Preparation Phase** (1 week)
|
||||
- Backup system implementation
|
||||
- Migration service development
|
||||
- Testing framework setup
|
||||
|
||||
2. **Testing Phase** (2 weeks)
|
||||
- Unit testing
|
||||
- Integration testing
|
||||
- Performance testing
|
||||
- Security testing
|
||||
|
||||
3. **Deployment Phase** (1 week)
|
||||
- Staged rollout
|
||||
- Monitoring
|
||||
- Support preparation
|
||||
- Documentation updates
|
||||
|
||||
4. **Post-Deployment** (2 weeks)
|
||||
- Monitoring
|
||||
- Bug fixes
|
||||
- Performance optimization
|
||||
- User feedback collection
|
||||
The migration fence ensures a controlled and safe transition while maintaining data integrity and application stability.
|
||||
Reference in New Issue
Block a user