[ADF-851] execute-outcome event for form service (#1989)

* execute-outcome event for form service

* readme updates

ng2-components/ng2-activiti-form/src/components/activiti-form.component.spec.ts

@@ -800,4 +800,18 @@ describe('ActivitiForm', () => {
         expect(formComponent.isOutcomeButtonEnabled(outcome)).toBeFalsy();
     });
 
+    it('should raise [executeOutcome] event for formService', (done) => {
+        formService.executeOutcome.subscribe(() => {
+            done();
+        });
+
+        let outcome = new FormOutcomeModel(new FormModel(), {
+            id: ActivitiForm.CUSTOM_OUTCOME_ID,
+            name: 'Custom'
+        });
+
+        formComponent.form = new FormModel();
+        formComponent.onOutcomeClicked(outcome);
+    });
+
 });

ng2-components/ng2-activiti-form/src/components/activiti-form.component.ts

@@ -211,9 +211,7 @@ export class ActivitiForm implements OnInit, AfterViewChecked, OnChanges {
     onOutcomeClicked(outcome: FormOutcomeModel): boolean {
         if (!this.readOnly && outcome && this.form) {
 
-            let args = new FormOutcomeEvent(outcome);
-            this.executeOutcome.emit(args);
-            if (args.defaultPrevented) {
+            if (!this.onExecuteOutcome(outcome)) {
                 return false;
             }
 
@@ -491,4 +489,20 @@ export class ActivitiForm implements OnInit, AfterViewChecked, OnChanges {
         this.handleError(error);
         this.formService.taskCompletedError.next(new FormErrorEvent(form, error));
     }
+
+    protected onExecuteOutcome(outcome: FormOutcomeModel): boolean {
+        let args = new FormOutcomeEvent(outcome);
+
+        this.formService.executeOutcome.next(args);
+        if (args.defaultPrevented) {
+            return false;
+        }
+
+        this.executeOutcome.emit(args);
+        if (args.defaultPrevented) {
+            return false;
+        }
+
+        return true;
+    }
 }