@codai/memorai
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Universal Database & Storage Service for CODAI Ecosystem - CBD Backend
359 lines • 14.1 kB
JavaScript
/**
* Sync Service - Production Implementation
* Handles real-time data synchronization between apps and services
*/
import { EventEmitter } from 'events';
export class SyncService extends EventEmitter {
constructor(config) {
super();
this.config = config;
this.isInitialized = false;
this.syncQueues = new Map(); // keyed by userId
this.statusMap = new Map();
this.isOnline = true;
}
async initialize() {
try {
if (this.config.enabled) {
// Initialize real-time connection based on provider
await this.initializeRealtimeProvider();
// Start processing queue
this.startProcessingQueue();
// Start heartbeat to check online status
this.startHeartbeat();
}
this.isInitialized = true;
this.emit('initialized');
console.log('🔄 Sync Service initialized');
}
catch (error) {
console.error('Failed to initialize sync service:', error);
this.emit('error', error);
throw error;
}
}
async shutdown() {
if (this.isInitialized) {
// Stop processing
if (this.processInterval) {
clearInterval(this.processInterval);
}
// Clean up queues
this.syncQueues.clear();
this.statusMap.clear();
this.isInitialized = false;
this.emit('shutdown');
console.log('🔄 Sync Service shutdown');
}
}
async scheduleOperation(operation) {
if (!this.isInitialized) {
throw new Error('Sync service not initialized');
}
try {
// Get or create sync queue for user
const queue = this.getOrCreateQueue(operation.userId);
// Add operation to queue
queue.operations.set(operation.id, {
...operation,
status: 'pending',
createdAt: new Date(),
updatedAt: new Date()
});
// Update status
this.updateSyncStatus(operation.userId, operation.appId);
this.emit('sync:scheduled', { operation });
// Process immediately if high priority
if (operation.priority >= 50) {
await this.processOperation(operation);
}
}
catch (error) {
console.error('Sync schedule error:', error);
this.emit('sync:error', { operation, error });
throw error;
}
}
async getSyncStatus(userId, appId) {
if (!appId) {
// Return all app statuses for user
return Array.from(this.statusMap.values()).filter(status => status.appId.startsWith(userId));
}
const statusKey = `${userId}:${appId}`;
const status = this.statusMap.get(statusKey);
return status ? [status] : [];
}
async resolveConflict(conflictId, resolution, resolvedData, userId) {
try {
// Find conflict across all queues
for (const [queueUserId, queue] of this.syncQueues.entries()) {
const conflict = queue.conflicts.get(conflictId);
if (conflict) {
// Apply resolution
conflict.resolution = resolution;
conflict.resolvedData = resolvedData;
conflict.resolvedAt = new Date();
conflict.resolvedBy = userId;
conflict.updatedAt = new Date();
// Remove from conflicts
queue.conflicts.delete(conflictId);
// Create new sync operation based on resolution
if (resolution === 'use_local' || resolution === 'use_remote' || resolution === 'merge') {
const data = resolution === 'use_local' ? conflict.localData :
resolution === 'use_remote' ? conflict.remoteData :
resolvedData || conflict.localData;
const newOperation = {
id: `sync_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`,
userId: queueUserId,
appId: conflict.syncOperationId.split(':')[0], // Extract app from operation ID
operation: 'update',
table: 'resolved_conflict',
recordId: conflict.id,
data,
status: 'pending',
retryCount: 0,
priority: 75, // High priority for conflict resolution
createdAt: new Date(),
updatedAt: new Date(),
version: 1,
metadata: {
resolvedConflict: conflictId,
resolution
}
};
await this.scheduleOperation(newOperation);
}
this.emit('sync:conflict_resolved', { conflict, resolution });
return true;
}
}
return false;
}
catch (error) {
console.error('Conflict resolution error:', error);
this.emit('sync:conflict_error', { conflictId, resolution, error });
return false;
}
}
async pauseSync(userId, appId) {
const statusKey = appId ? `${userId}:${appId}` : userId;
for (const [key, status] of this.statusMap.entries()) {
if (key.startsWith(statusKey)) {
status.syncInProgress = false;
this.emit('sync:paused', { userId, appId });
}
}
}
async resumeSync(userId, appId) {
const statusKey = appId ? `${userId}:${appId}` : userId;
for (const [key, status] of this.statusMap.entries()) {
if (key.startsWith(statusKey)) {
status.syncInProgress = true;
this.emit('sync:resumed', { userId, appId });
// Process pending operations
const queue = this.syncQueues.get(userId);
if (queue) {
for (const operation of queue.operations.values()) {
if (operation.status === 'pending' && (!appId || operation.appId === appId)) {
await this.processOperation(operation);
}
}
}
}
}
}
async getHealth() {
if (!this.isInitialized) {
return { status: 'unhealthy', details: { initialized: false } };
}
try {
const totalOperations = Array.from(this.syncQueues.values())
.reduce((total, queue) => total + queue.operations.size, 0);
const totalConflicts = Array.from(this.syncQueues.values())
.reduce((total, queue) => total + queue.conflicts.size, 0);
return {
status: this.isOnline ? 'healthy' : 'degraded',
details: {
initialized: true,
enabled: this.config.enabled,
provider: this.config.provider,
isOnline: this.isOnline,
totalQueues: this.syncQueues.size,
totalOperations,
totalConflicts,
activeUsers: this.syncQueues.size
}
};
}
catch (error) {
return {
status: 'unhealthy',
details: {
error: error instanceof Error ? error.message : 'Unknown error'
}
};
}
}
// ==================== PRIVATE METHODS ====================
async initializeRealtimeProvider() {
switch (this.config.provider) {
case 'socket.io':
await this.initializeSocketIO();
break;
case 'supabase':
await this.initializeSupabase();
break;
case 'pusher':
await this.initializePusher();
break;
default:
console.log('Using mock realtime provider');
}
}
async initializeSocketIO() {
// TODO: Initialize Socket.IO connection
console.log('Socket.IO realtime provider initialized');
}
async initializeSupabase() {
// TODO: Initialize Supabase realtime connection
console.log('Supabase realtime provider initialized');
}
async initializePusher() {
// TODO: Initialize Pusher connection
console.log('Pusher realtime provider initialized');
}
getOrCreateQueue(userId) {
if (!this.syncQueues.has(userId)) {
this.syncQueues.set(userId, {
operations: new Map(),
processing: new Set(),
conflicts: new Map()
});
}
return this.syncQueues.get(userId);
}
startProcessingQueue() {
// Process sync operations every 5 seconds
this.processInterval = setInterval(async () => {
await this.processAllQueues();
}, 5000);
}
async processAllQueues() {
if (!this.isOnline)
return;
for (const [userId, queue] of this.syncQueues.entries()) {
// Process pending operations
for (const operation of queue.operations.values()) {
if (operation.status === 'pending' && !queue.processing.has(operation.id)) {
await this.processOperation(operation);
}
}
// Retry failed operations
for (const operation of queue.operations.values()) {
if (operation.status === 'failed' && operation.retryCount < 3) {
await this.retryOperation(operation);
}
}
}
}
async processOperation(operation) {
const queue = this.getOrCreateQueue(operation.userId);
if (queue.processing.has(operation.id)) {
return; // Already processing
}
queue.processing.add(operation.id);
try {
// Mark as processing
operation.status = 'pending';
operation.updatedAt = new Date();
// Simulate sync operation
const success = await this.executeSync(operation);
if (success) {
operation.status = 'synced';
operation.syncedAt = new Date();
queue.operations.delete(operation.id);
this.emit('sync:completed', { operation });
}
else {
operation.status = 'failed';
operation.retryCount++;
this.emit('sync:failed', { operation });
}
}
catch (error) {
operation.status = 'failed';
operation.error = error instanceof Error ? error.message : 'Unknown error';
operation.retryCount++;
this.emit('sync:error', { operation, error });
}
finally {
queue.processing.delete(operation.id);
this.updateSyncStatus(operation.userId, operation.appId);
}
}
async retryOperation(operation) {
// Exponential backoff
const delay = Math.min(1000 * Math.pow(2, operation.retryCount), 30000);
setTimeout(async () => {
await this.processOperation(operation);
}, delay);
}
async executeSync(operation) {
// Mock sync execution - in production this would:
// 1. Send data to remote service/database
// 2. Handle conflicts
// 3. Update local state
// Simulate network delay
await new Promise(resolve => setTimeout(resolve, 100));
// Simulate success rate (95%)
return Math.random() > 0.05;
}
updateSyncStatus(userId, appId) {
const statusKey = `${userId}:${appId}`;
const queue = this.getOrCreateQueue(userId);
const pendingOps = Array.from(queue.operations.values())
.filter(op => op.appId === appId && op.status === 'pending').length;
const failedOps = Array.from(queue.operations.values())
.filter(op => op.appId === appId && op.status === 'failed').length;
const conflicts = queue.conflicts.size;
const syncInProgress = queue.processing.size > 0;
const status = {
appId,
lastSync: new Date(),
pendingOperations: pendingOps,
failedOperations: failedOps,
conflicts,
isOnline: this.isOnline,
syncInProgress
};
this.statusMap.set(statusKey, status);
this.emit('sync:status_updated', { userId, appId, status });
}
startHeartbeat() {
// Check online status every 30 seconds
setInterval(() => {
this.checkOnlineStatus();
}, 30000);
}
async checkOnlineStatus() {
// Simple connectivity check - in production this would ping the server
try {
// Simulate network check
const wasOnline = this.isOnline;
this.isOnline = true; // In production: await this.pingServer()
if (!wasOnline && this.isOnline) {
this.emit('sync:online');
console.log('🔄 Sync service back online');
}
else if (wasOnline && !this.isOnline) {
this.emit('sync:offline');
console.log('🔄 Sync service offline');
}
}
catch (error) {
this.isOnline = false;
this.emit('sync:offline');
}
}
}
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