started refactor of data-sync-service

apps/data-sync-service/src/handlers/exchanges/operations/exchange-stats.operations.ts

@@ -0,0 +1,28 @@
+import { getLogger } from '@stock-bot/logger';
+import { getPostgreSQLClient } from '@stock-bot/postgres-client';
+import type { JobPayload } from '../../../types/job-payloads';
+
+const logger = getLogger('enhanced-sync-exchange-stats');
+
+export async function getExchangeStats(payload: JobPayload): Promise<any> {
+  logger.info('Getting exchange statistics...');
+
+  try {
+    const postgresClient = getPostgreSQLClient();
+    const query = `
+      SELECT 
+        COUNT(*) as total_exchanges,
+        COUNT(CASE WHEN active = true THEN 1 END) as active_exchanges,
+        COUNT(DISTINCT country) as countries,
+        COUNT(DISTINCT currency) as currencies
+      FROM exchanges
+    `;
+    const result = await postgresClient.query(query);
+    
+    logger.info('Retrieved exchange statistics');
+    return result.rows[0];
+  } catch (error) {
+    logger.error('Failed to get exchange statistics', { error });
+    throw error;
+  }
+}