Feature/optimize admin control panel endpoint using promise.all (#3741)

* Optimize by using Promise.all()

* Update changelog

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Optimized the asynchronous operations using `Promise.all()` in the info service
+- Optimized the asynchronous operations using `Promise.all()` in the admin control panel endpoint
 - Extracted the users from the admin control panel endpoint to a dedicated endpoint
 - Improved the language localization for Italian (`it`)
 

apps/api/src/app/admin/admin.service.ts

@@ -108,8 +108,7 @@ export class AdminService {
   }
 
   public async get(): Promise<AdminData> {
-    return {
-      exchangeRates: this.exchangeRateDataService
+    const exchangeRates = this.exchangeRateDataService
       .getCurrencies()
       .filter((currency) => {
         return currency !== DEFAULT_CURRENCY;
@@ -132,10 +131,19 @@ export class AdminService {
             currency
           )
         };
-        }),
-      settings: await this.propertyService.get(),
-      transactionCount: await this.prismaService.order.count(),
-      userCount: await this.prismaService.user.count(),
+      });
+
+    const [settings, transactionCount, userCount] = await Promise.all([
+      this.propertyService.get(),
+      this.prismaService.order.count(),
+      this.prismaService.user.count()
+    ]);
+
+    return {
+      exchangeRates,
+      settings,
+      transactionCount,
+      userCount,
       version: environment.version
     };
   }