Choose / Edit / Create customers during billing.

bookie/src/app/customers/customer.service.ts

@@ -1,4 +1,4 @@
-import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
 import { Injectable } from '@angular/core';
 import { Observable } from 'rxjs/internal/Observable';
 import { catchError } from 'rxjs/operators';
@@ -55,4 +55,13 @@ export class CustomerService {
       .delete<Customer>(`${url}/${id}`, httpOptions)
       .pipe(catchError(this.log.handleError(serviceName, 'delete'))) as Observable<Customer>;
   }
+
+  autocomplete(query: string): Observable<Customer[]> {
+    const options = { params: new HttpParams().set('q', query) };
+    return this.http
+      .get<Customer[]>(`${url}/query`, options)
+      .pipe(catchError(this.log.handleError(serviceName, 'autocomplete'))) as Observable<
+      Customer[]
+    >;
+  }
 }