feat(routerDirection): refactors goBack

angular/src/directives/index.ts

@@ -5,7 +5,7 @@ export { RadioValueAccessor } from './control-value-accessors/radio-value-access
 export { SelectValueAccessor } from './control-value-accessors/select-value-accessor';
 export { TextValueAccessor } from './control-value-accessors/text-value-accessor';
 
-export { GoBack } from './navigation/go-back';
+export { RouterDirection } from './navigation/router-direction';
 export { IonBackButton } from './navigation/ion-back-button';
 export { NavDelegate } from './navigation/nav-delegate';
 export { TabDelegate } from './navigation/tab-delegate';

angular/src/directives/navigation/go-back.ts

@@ -1,17 +0,0 @@
-import { Directive, HostListener } from '@angular/core';
-import { NavController, NavIntent } from '../../providers/nav-controller';
-
-@Directive({
-  selector: '[goBack]',
-})
-export class GoBack {
-
-  constructor(
-    private navCtrl: NavController,
-  ) {}
-
-  @HostListener('click')
-  onClick() {
-    this.navCtrl.setIntent(NavIntent.Back);
-  }
-}

angular/src/directives/navigation/router-direction.ts

@@ -0,0 +1,28 @@
+import { Directive, HostListener, Input } from '@angular/core';
+import { NavController, NavIntent } from '../../providers/nav-controller';
+
+@Directive({
+  selector: '[routerDirection]',
+})
+export class RouterDirection {
+
+  @Input() routerDirection: string;
+
+  constructor(
+    private navCtrl: NavController,
+  ) {}
+
+  @HostListener('click')
+  onClick() {
+    this.navCtrl.setIntent(textToIntent(this.routerDirection));
+  }
+}
+
+function textToIntent(direction: string) {
+  switch (direction) {
+    case 'forward': return NavIntent.Forward;
+    case 'back': return NavIntent.Back;
+    case 'root': return NavIntent.Root;
+    default: return NavIntent.Auto;
+  }
+}

angular/src/module.ts

@@ -94,9 +94,9 @@ const DECLARATIONS = [
   c.TextValueAccessor,
 
   // navigation
-  c.GoBack,
   c.IonBackButton,
   c.IonRouterOutlet,
+  c.RouterDirection,
   c.NavDelegate,
   c.TabDelegate,
   c.TabsDelegate,