refactoring: balance sheet report.

refactoring: trial balance sheet report.
refactoring: general ledger report.
refactoring: journal report.
refactoring: P&L report.

server/src/repositories/TenantRepository.ts

@@ -1,16 +1,45 @@
 import { Container } from 'typedi';
 import TenancyService from 'services/Tenancy/TenancyService';
+import CachableRepository from './CachableRepository';
 
-export default class TenantRepository {
+export default class TenantRepository extends CachableRepository {
+  repositoryName: string;
   tenantId: number;
   tenancy: TenancyService;
-
+  modelsInstance: any;
+  repositoriesInstance: any;
+  cacheInstance: any;
+  
   /**
    * Constructor method.
    * @param {number} tenantId 
    */
   constructor(tenantId: number) {
+    super();
+
     this.tenantId = tenantId;
     this.tenancy = Container.get(TenancyService);
+    this.repositoryName = this.constructor.name;
+  }
+
+  get models() {
+    if (!this.modelsInstance) {
+      this.modelsInstance = this.tenancy.models(this.tenantId);
+    }
+    return this.modelsInstance;
+  }
+
+  get repositories() {
+    if (!this.repositoriesInstance) {
+      this.repositoriesInstance = this.tenancy.repositories(this.tenantId);
+    }
+    return this.repositoriesInstance;
+  }
+
+  get cache() {
+    if (!this.cacheInstance) {
+      this.cacheInstance = this.tenancy.cache(this.tenantId);
+    }
+    return this.cacheInstance;
   }
 }