Add services

src/service/customer.service.ts

@@ -0,0 +1,50 @@
+import { HttpClient } from '@angular/common/http';
+import { Injectable } from '@angular/core';
+
+export interface Country {
+    name?: string;
+    code?: string;
+}
+
+export interface Representative {
+    name?: string;
+    image?: string;
+}
+
+export interface Customer {
+    id?: number;
+    name?: string;
+    country?: Country;
+    company?: string;
+    date?: string;
+    status?: string;
+    activity?: number;
+    representative?: Representative;
+}
+
+@Injectable()
+export class CustomerService {
+
+    constructor(private http: HttpClient) { }
+
+    getCustomersSmall() {
+        return this.http.get<any>('assets/demo/data/customers-small.json')
+            .toPromise()
+            .then(res => res.data as Customer[])
+            .then(data => data);
+    }
+
+    getCustomersMedium() {
+        return this.http.get<any>('assets/demo/data/customers-medium.json')
+            .toPromise()
+            .then(res => res.data as Customer[])
+            .then(data => data);
+    }
+
+    getCustomersLarge() {
+        return this.http.get<any>('assets/demo/data/customers-large.json')
+            .toPromise()
+            .then(res => res.data as Customer[])
+            .then(data => data);
+    }
+}