WIP expense items

app/components/add-reimbursement/component.js

@@ -4,19 +4,37 @@ import { alias } from '@ember/object/computed';
 import { inject as service } from '@ember/service';
 import { action } from '@ember/object';
 import { A } from '@ember/array';
+import Reimbursement from 'kredits-web/models/reimbursement';
+import Expense from 'kredits-web/models/expense';
 
 export default class AddReimbursementComponent extends Component {
   @service kredits;
 
   @tracked recipientId = null;
-  @tracked title = "";
-  @tracked total = "0";
+  @tracked title = '';
+  @tracked total = '0';
   @tracked expenses = A([]);;
+  @tracked newExpense = Expense.create();
+
+  // TODO fetch/apply exchange rate to (W)BTC
+  currencies = [
+    { code: 'EUR' },
+    { code: 'USD' },
+    { code: 'GBP' }
+  ];
 
   get typeofTotal() {
     return typeof this.total;
   }
 
+  get submitButtonEnabled() {
+    return this.expenses.length > 0;
+  }
+
+  get submitButtonDisabled() {
+    return !this.submitButtonEnabled;
+  }
+
   @alias('kredits.contributorsSorted') contributors;
 
   @action