Used shareReplay instead cache service (#44)

src/app/thrift/checkout-cache.service.ts

@@ -1,29 +0,0 @@
-import { Injectable } from '@angular/core';
-import { Subject, Observable, BehaviorSubject } from 'rxjs';
-
-import { DomainService } from './domain.service';
-import { toGenReference } from './converters';
-import { Snapshot } from '../gen-damsel/domain_config';
-
-@Injectable()
-export class CheckoutCacheService {
-    private cache: Snapshot;
-    private isLoading = false;
-    private snapshot$: Subject<Snapshot> = new BehaviorSubject(null);
-
-    constructor(private dmtService: DomainService) {}
-
-    checkout(): Observable<Snapshot> {
-        if (this.cache) {
-            this.snapshot$.next(this.cache);
-        } else if (!this.isLoading) {
-            this.isLoading = true;
-            this.dmtService.checkout(toGenReference()).subscribe(s => {
-                this.cache = s;
-                this.isLoading = false;
-                this.snapshot$.next(s);
-            });
-        }
-        return this.snapshot$;
-    }
-}

src/app/thrift/domain-typed-manager.ts

@@ -1,7 +1,6 @@
 import { Injectable } from '@angular/core';
 import { Observable, combineLatest } from 'rxjs';
-import { map, switchMap } from 'rxjs/internal/operators';
-import { filter } from 'rxjs/operators';
+import { shareReplay, map, switchMap } from 'rxjs/operators';
 
 import {
     Domain,
@@ -16,7 +15,6 @@ import { findDomainObject, findDomainObjects } from '../claim/domain-typed-manag
 import { createShopTerminal } from '../claim/domain-typed-manager/create-shop-terminal';
 import { toGenReference } from './converters';
 import { DomainService } from './domain.service';
-import { CheckoutCacheService } from './checkout-cache.service';
 
 const findBusinessScheduleObjects = (domain: Domain): BusinessScheduleObject[] =>
     findDomainObjects(domain, 'business_schedule');
@@ -49,13 +47,10 @@ const filterByTerminalSelector = (
 export class DomainTypedManager {
     private domain: Observable<Domain>;
 
-    constructor(
-        private dmtService: DomainService,
-        private checkoutCacheService: CheckoutCacheService
-    ) {
-        this.domain = this.checkoutCacheService.checkout().pipe(
-            filter(s => s !== null),
-            map(s => s.domain)
+    constructor(private dmtService: DomainService) {
+        this.domain = this.dmtService.checkout(toGenReference()).pipe(
+            map(s => s.domain),
+            shareReplay(1)
         );
     }
 

src/app/thrift/thrift.module.ts

@@ -4,15 +4,13 @@ import { DomainService } from './domain.service';
 import { PaymentProcessingService } from './payment-processing.service';
 import { MerchantStatisticsService } from './merchant-statistics.service';
 import { DomainTypedManager } from './domain-typed-manager';
-import { CheckoutCacheService } from './checkout-cache.service';
 
 @NgModule({
     providers: [
         DomainService,
         DomainTypedManager,
         PaymentProcessingService,
-        MerchantStatisticsService,
-        CheckoutCacheService
+        MerchantStatisticsService
     ]
 })
 export class ThriftModule {}