feature(modal): support lazy loading of modal pages

src/components/modal/modal-component.ts

@@ -5,6 +5,7 @@ import { NavParams } from '../../navigation/nav-params';
 import { NavOptions } from '../../navigation/nav-util';
 import { ViewController } from '../../navigation/view-controller';
 import { GestureController, BlockerDelegate, GESTURE_MENU_SWIPE, GESTURE_GO_BACK_SWIPE } from '../../gestures/gesture-controller';
+import { ModuleLoader } from '../../util/module-loader';
 import { assert } from '../../util/util';
 
 /**
@@ -31,7 +32,9 @@ export class ModalCmp {
     public _renderer: Renderer,
     public _navParams: NavParams,
     public _viewCtrl: ViewController,
-    gestureCtrl: GestureController
+    gestureCtrl: GestureController,
+    public moduleLoader: ModuleLoader
+
   ) {
     let opts = _navParams.get('opts');
     assert(opts, 'modal data must be valid');
@@ -49,7 +52,12 @@ export class ModalCmp {
   /** @private */
   _load(component: any) {
     if (component) {
-      const componentFactory = this._cfr.resolveComponentFactory(component);
+
+      let cfr = this.moduleLoader.getComponentFactoryResolver(component);
+      if (!cfr) {
+        cfr = this._cfr;
+      }
+      const componentFactory = cfr.resolveComponentFactory(component);
 
       // ******** DOM WRITE ****************
       const componentRef = this._viewport.createComponent(componentFactory, this._viewport.length, this._viewport.parentInjector, []);

src/components/modal/modal-controller.ts

@@ -4,6 +4,7 @@ import { App } from '../app/app';
 import { Config } from '../../config/config';
 import { Modal } from './modal';
 import { ModalOptions } from './modal-options';
+import { DeepLinker } from '../../navigation/deep-linker';
 
 /**
  * @name ModalController
@@ -116,7 +117,7 @@ import { ModalOptions } from './modal-options';
 @Injectable()
 export class ModalController {
 
-  constructor(private _app: App, public config: Config) { }
+  constructor(private _app: App, public config: Config, private deepLinker: DeepLinker) { }
 
   /**
    * Create a modal to display. See below for options.
@@ -126,6 +127,6 @@ export class ModalController {
    * @param {object} opts Modal options
    */
   create(component: any, data: any = {}, opts: ModalOptions = {}) {
-    return new Modal(this._app, component, data, opts, this.config);
+    return new Modal(this._app, component, data, opts, this.config, this.deepLinker);
   }
 }

src/components/modal/modal-impl.ts

@@ -0,0 +1,69 @@
+import { App } from '../app/app';
+import { Config } from '../../config/config';
+import { isPresent } from '../../util/util';
+import { PORTAL_MODAL } from '../app/app-constants';
+import { ModalCmp } from './modal-component';
+import { ModalOptions } from './modal-options';
+import { ModalSlideIn, ModalSlideOut, ModalMDSlideIn, ModalMDSlideOut } from './modal-transitions';
+import { NavOptions } from '../../navigation/nav-util';
+import { ViewController } from '../../navigation/view-controller';
+
+/**
+ * @private
+ */
+export class ModalImpl extends ViewController {
+  private _app: App;
+  private _enterAnimation: string;
+  private _leaveAnimation: string;
+
+  constructor(app: App, component: any, data: any, opts: ModalOptions = {}, config: Config) {
+    data = data || {};
+    data.component = component;
+    opts.showBackdrop = isPresent(opts.showBackdrop) ? !!opts.showBackdrop : true;
+    opts.enableBackdropDismiss = isPresent(opts.enableBackdropDismiss) ? !!opts.enableBackdropDismiss : true;
+    data.opts = opts;
+
+    super(ModalCmp, data, null);
+    this._app = app;
+    this._enterAnimation = opts.enterAnimation;
+    this._leaveAnimation = opts.leaveAnimation;
+
+    this.isOverlay = true;
+
+    config.setTransition('modal-slide-in', ModalSlideIn);
+    config.setTransition('modal-slide-out', ModalSlideOut);
+    config.setTransition('modal-md-slide-in', ModalMDSlideIn);
+    config.setTransition('modal-md-slide-out', ModalMDSlideOut);
+  }
+
+  /**
+   * @private
+   */
+  getTransitionName(direction: string): string {
+    let key: string;
+    if (direction === 'back') {
+      if (this._leaveAnimation) {
+        return this._leaveAnimation;
+      }
+      key = 'modalLeave';
+    } else {
+      if (this._enterAnimation) {
+        return this._enterAnimation;
+      }
+      key = 'modalEnter';
+    }
+    return this._nav && this._nav.config.get(key);
+  }
+
+  /**
+   * Present the action sheet instance.
+   *
+   * @param {NavOptions} [opts={}] Nav options to go with this transition.
+   * @returns {Promise} Returns a promise which is resolved when the transition has completed.
+   */
+  present(navOptions: NavOptions = {}) {
+    navOptions.minClickBlockDuration = navOptions.minClickBlockDuration || 400;
+    return this._app.present(this, navOptions, PORTAL_MODAL);
+  }
+
+}

src/components/modal/modal.ts

@@ -1,70 +1,25 @@
 import { App } from '../app/app';
 import { Config } from '../../config/config';
-import { isPresent } from '../../util/util';
-import { PORTAL_MODAL } from '../app/app-constants';
-import { ModalCmp } from './modal-component';
+
 import { ModalOptions } from './modal-options';
-import { ModalSlideIn, ModalSlideOut, ModalMDSlideIn, ModalMDSlideOut } from './modal-transitions';
-import { NavOptions } from '../../navigation/nav-util';
-import { ViewController } from '../../navigation/view-controller';
+import { DeepLinker } from '../../navigation/deep-linker';
 
+import { Overlay } from '../../navigation/overlay';
+import { OverlayProxy } from '../../navigation/overlay-proxy';
+import { ModalImpl } from './modal-impl';
 
 /**
  * @private
  */
-export class Modal extends ViewController {
-  private _app: App;
-  private _enterAnimation: string;
-  private _leaveAnimation: string;
+export class Modal extends OverlayProxy {
 
-  constructor(app: App, component: any, data: any, opts: ModalOptions = {}, config: Config) {
-    data = data || {};
-    data.component = component;
-    opts.showBackdrop = isPresent(opts.showBackdrop) ? !!opts.showBackdrop : true;
-    opts.enableBackdropDismiss = isPresent(opts.enableBackdropDismiss) ? !!opts.enableBackdropDismiss : true;
-    data.opts = opts;
+  public isOverlay: boolean = true;
 
-    super(ModalCmp, data, null);
-    this._app = app;
-    this._enterAnimation = opts.enterAnimation;
-    this._leaveAnimation = opts.leaveAnimation;
-
-    this.isOverlay = true;
-
-    config.setTransition('modal-slide-in', ModalSlideIn);
-    config.setTransition('modal-slide-out', ModalSlideOut);
-    config.setTransition('modal-md-slide-in', ModalMDSlideIn);
-    config.setTransition('modal-md-slide-out', ModalMDSlideOut);
+  constructor(app: App, component: any, private data: any, private opts: ModalOptions = {}, config: Config, deepLinker: DeepLinker) {
+    super(app, component, config, deepLinker);
   }
 
-  /**
-   * @private
-   */
-  getTransitionName(direction: string): string {
-    let key: string;
-    if (direction === 'back') {
-      if (this._leaveAnimation) {
-        return this._leaveAnimation;
+  getImplementation(): Overlay {
+    return new ModalImpl(this._app, this._component, this.data, this.opts, this._config);
   }
-      key = 'modalLeave';
-    } else {
-      if (this._enterAnimation) {
-        return this._enterAnimation;
-      }
-      key = 'modalEnter';
-    }
-    return this._nav && this._nav.config.get(key);
-  }
-
-  /**
-   * Present the action sheet instance.
-   *
-   * @param {NavOptions} [opts={}] Nav options to go with this transition.
-   * @returns {Promise} Returns a promise which is resolved when the transition has completed.
-   */
-  present(navOptions: NavOptions = {}) {
-    navOptions.minClickBlockDuration = navOptions.minClickBlockDuration || 400;
-    return this._app.present(this, navOptions, PORTAL_MODAL);
-  }
-
 }

src/components/modal/test/modal.spec.ts

@@ -1,19 +1,16 @@
-import { mockApp, mockConfig } from '../../../util/mock-providers';
+import { mockApp, mockConfig, mockDeepLinker } from '../../../util/mock-providers';
 import { Component } from '@angular/core';
 import { ModalController } from '../modal-controller';
 import { ModalCmp } from '../modal-component';
-import { ViewController } from '../../../navigation/view-controller';
 
 describe('Modal', () => {
 
   describe('create', () => {
 
-    it('should have the correct properties on modal view controller instance', () => {
-      let modalCtrl = new ModalController(mockApp(), mockConfig());
-      let modalViewController = modalCtrl.create(ComponentToPresent);
-      expect(modalViewController.component).toEqual(ModalCmp);
-      expect(modalViewController.isOverlay).toEqual(true);
-      expect(modalViewController instanceof ViewController).toEqual(true);
+    it('should have the correct properties on modal view controller proxy instance', () => {
+      let modalCtrl = new ModalController(mockApp(), mockConfig(), mockDeepLinker());
+      let modalViewControllerProxy = modalCtrl.create(ComponentToPresent);
+      expect(modalViewControllerProxy._component).toEqual(ModalCmp);
     });
   });
 

src/navigation/deep-linker.ts

@@ -125,8 +125,6 @@ export class DeepLinker {
   _history: string[] = [];
   /** @internal */
   _indexAliasUrl: string;
-  /** @internal */
-  _cfrMap = new Map<any, ComponentFactoryResolver>();
 
 
   constructor(
@@ -277,12 +275,9 @@ export class DeepLinker {
     if (link.loadChildren) {
       // awesome, looks like we'll lazy load this component
       // using loadChildren as the URL to request
-      return this._moduleLoader.load(link.loadChildren).then(loadedModule => {
-        // kerpow!! we just lazy loaded a component!!
-        // update the existing link with the loaded component
-        link.component = loadedModule.component;
-        this._cfrMap.set(link.component, loadedModule.componentFactoryResolver);
-        return link.component;
+      return this._moduleLoader.load(link.loadChildren).then((response) => {
+        link.component = response.component;
+        return response.component;
       });
     }
 
@@ -294,7 +289,8 @@ export class DeepLinker {
    * @internal
    */
   resolveComponent(component: any): ComponentFactory<any> {
-    let cfr = this._cfrMap.get(component);
+
+    let cfr = this._moduleLoader.getComponentFactoryResolver(component);
     if (!cfr) {
       cfr = this._baseCfr;
     }

src/navigation/overlay-proxy.ts

@@ -0,0 +1,77 @@
+import { App } from '../components/app/app';
+import { Config } from '../config/config';
+import { isString } from '../util/util';
+
+
+import { DeepLinker } from './deep-linker';
+import { NavOptions } from './nav-util';
+import { Overlay } from './overlay';
+
+
+export class OverlayProxy {
+
+  overlay: Overlay;
+  _onWillDismiss: Function;
+  _onDidDismiss: Function;
+
+
+  constructor(public _app: App, public _component: any, public _config: Config, public _deepLinker: DeepLinker) {
+  }
+
+  getImplementation(): Overlay {
+    throw new Error('Child class must implement "getImplementation" method');
+  }
+
+  /**
+   * Present the modal instance.
+   *
+   * @param {NavOptions} [opts={}] Nav options to go with this transition.
+   * @returns {Promise} Returns a promise which is resolved when the transition has completed.
+   */
+  present(navOptions: NavOptions = {}) {
+    // check if it's a lazy loaded component, or not
+    const isLazyLoaded = isString(this._component);
+    if (isLazyLoaded) {
+
+      return this._deepLinker.getComponentFromName(this._component).then((loadedComponent: any) => {
+        this._component = loadedComponent;
+        return this.createAndPresentOverlay(navOptions);
+      });
+    } else {
+      return this.createAndPresentOverlay(navOptions);
+    }
+  }
+
+  dismiss(data?: any, role?: any, navOptions?: NavOptions): Promise<any> {
+    if (this.overlay) {
+      return this.overlay.dismiss();
+    }
+  }
+
+  /**
+   * Called when the current viewController has be successfully dismissed
+   */
+  onDidDismiss(callback: Function) {
+    this._onDidDismiss = callback;
+    if (this.overlay) {
+      this.overlay.onDidDismiss(this._onDidDismiss);
+    }
+  }
+
+  createAndPresentOverlay(navOptions: NavOptions) {
+    this.overlay = this.getImplementation();
+    this.overlay.onWillDismiss(this._onWillDismiss);
+    this.overlay.onDidDismiss(this._onDidDismiss);
+    return this.overlay.present(navOptions);
+  }
+
+  /**
+   * Called when the current viewController will be dismissed
+   */
+  onWillDismiss(callback: Function) {
+    this._onWillDismiss = callback;
+    if (this.overlay) {
+      this.overlay.onWillDismiss(this._onWillDismiss);
+    }
+  }
+}

src/navigation/overlay.ts

@@ -0,0 +1,8 @@
+import { NavOptions } from './nav-util';
+
+export interface Overlay {
+  present(opts?: NavOptions): Promise<any>;
+  dismiss(data?: any, role?: any, navOptions?: NavOptions): Promise<any>;
+  onDidDismiss(callback: Function): void;
+  onWillDismiss(callback: Function): void;
+}

src/navigation/test/overlay-proxy.spec.ts

@@ -0,0 +1,119 @@
+import { OverlayProxy } from '../overlay-proxy';
+
+import { mockApp, mockConfig, mockDeepLinker, mockOverlay } from '../../util/mock-providers';
+
+describe('Overlay Proxy', () => {
+  describe('dismiss', () => {
+    it('should call dismiss if overlay is loaded', (done: Function) => {
+
+      const instance = new OverlayProxy(mockApp(), 'my-component', mockConfig(), mockDeepLinker());
+      instance.overlay = mockOverlay();
+      spyOn(instance.overlay, instance.overlay.dismiss.name).and.returnValue(Promise.resolve());
+
+      const promise = instance.dismiss(null, null, null);
+
+      promise.then(() => {
+        expect(instance.overlay.dismiss).toHaveBeenCalled();
+        done();
+      }).catch((err: Error) => {
+        done(err);
+      });
+    });
+  });
+
+  describe('onWillDismiss', () => {
+    it('should update the handler on the overlay object', () => {
+      const instance = new OverlayProxy(mockApp(), 'my-component', mockConfig(), mockDeepLinker());
+      instance.overlay = mockOverlay();
+      spyOn(instance.overlay, instance.overlay.onWillDismiss.name);
+
+      const handler = () => { };
+      instance.onWillDismiss(handler);
+
+      expect(instance.overlay.onWillDismiss).toHaveBeenCalledWith(handler);
+    });
+  });
+
+  describe('onDidDismiss', () => {
+    it('should update the handler on the overlay object', () => {
+      const instance = new OverlayProxy(mockApp(), 'my-component', mockConfig(), mockDeepLinker());
+      instance.overlay = mockOverlay();
+      spyOn(instance.overlay, instance.overlay.onDidDismiss.name);
+
+      const handler = () => { };
+      instance.onDidDismiss(handler);
+
+      expect(instance.overlay.onDidDismiss).toHaveBeenCalledWith(handler);
+    });
+  });
+
+  describe('createAndPresentOverlay', () => {
+    it('should set onWillDismiss and onDidDismiss handlers', (done: Function) => {
+      const instance = new OverlayProxy(mockApp(), 'my-component', mockConfig(), mockDeepLinker());
+      const handler = () => { };
+      instance.onWillDismiss(handler);
+      instance.onDidDismiss(handler);
+      const knownOptions = {};
+      const knownOverlay = mockOverlay();
+
+      spyOn(knownOverlay, knownOverlay.present.name).and.returnValue(Promise.resolve());
+      spyOn(knownOverlay, knownOverlay.onDidDismiss.name);
+      spyOn(knownOverlay, knownOverlay.onWillDismiss.name);
+      spyOn(instance, 'getImplementation').and.returnValue(knownOverlay);
+
+      const promise = instance.createAndPresentOverlay(knownOptions);
+
+      promise.then(() => {
+        expect(knownOverlay.present).toHaveBeenCalledWith(knownOptions);
+        expect(knownOverlay.onDidDismiss).toHaveBeenCalledWith(handler);
+        expect(knownOverlay.onWillDismiss).toHaveBeenCalledWith(handler);
+        done();
+      }).catch((err: Error) => {
+        done(err);
+      });
+    });
+  });
+
+  describe('present', () => {
+    it('should use present the overlay immediately if the component is not a string', (done: Function) => {
+      const knownComponent = { };
+      const deepLinker = mockDeepLinker();
+      const knownOverlay = mockOverlay();
+      const instance = new OverlayProxy(mockApp(), knownComponent, mockConfig(), deepLinker);
+      const knownOptions = {};
+
+      spyOn(instance, 'getImplementation').and.returnValue(knownOverlay);
+      spyOn(deepLinker, 'getComponentFromName');
+
+      const promise = instance.present(knownOptions);
+
+      promise.then(() => {
+        expect(deepLinker.getComponentFromName).not.toHaveBeenCalled();
+        done();
+      }).catch((err: Error) => {
+        done(err);
+      });
+    });
+
+    it('should load the component if its a string before using it', (done: Function) => {
+      const knownComponent = { };
+      const deepLinker = mockDeepLinker();
+      const knownOverlay = mockOverlay();
+      const componentName = 'my-component';
+      const instance = new OverlayProxy(mockApp(), componentName, mockConfig(), deepLinker);
+      const knownOptions = {};
+
+      spyOn(instance, 'getImplementation').and.returnValue(knownOverlay);
+      spyOn(deepLinker, 'getComponentFromName').and.returnValue(Promise.resolve(knownComponent));
+
+      const promise = instance.present(knownOptions);
+
+      promise.then(() => {
+        expect(deepLinker.getComponentFromName).toHaveBeenCalledWith(componentName);
+        done();
+      }).catch((err: Error) => {
+        done(err);
+      });
+    });
+  });
+});

src/util/mock-providers.ts

@@ -12,6 +12,7 @@ import { Haptic } from '../tap-click/haptic';
 import { IonicApp } from '../components/app/app-root';
 import { Keyboard } from '../platform/keyboard';
 import { Menu } from '../components/menu/menu';
+import { NavOptions } from '../navigation/nav-util';
 import { NavControllerBase } from '../navigation/nav-controller-base';
 import { OverlayPortal } from '../components/nav/overlay-portal';
 import { PageTransition } from '../transitions/page-transition';
@@ -528,3 +529,12 @@ export function noop(): any { return 'noop'; };
 export function mockModuleLoader() {
   return { };
 }
+
+export function mockOverlay() {
+  return {
+    present: (opts?: NavOptions) => { return Promise.resolve(); },
+    dismiss: (data?: any, role?: any, navOptions?: NavOptions) => { return Promise.resolve(); },
+    onDidDismiss: (callback: Function) => { },
+    onWillDismiss: (callback: Function) => { }
+  };
+}

src/util/module-loader.ts

@@ -4,12 +4,17 @@ import { NgModuleLoader } from './ng-module-loader';
 
 export const LAZY_LOADED_TOKEN = new OpaqueToken('LZYCMP');
 
+
+
 /**
  * @private
  */
 @Injectable()
 export class ModuleLoader {
 
+  /** @internal */
+  _cfrMap = new Map<any, ComponentFactoryResolver>();
+
   constructor(
     private _ngModuleLoader: NgModuleLoader,
     private _injector: Injector) {}
@@ -20,17 +25,24 @@ export class ModuleLoader {
 
     const splitString = modulePath.split(SPLITTER);
 
-    return this._ngModuleLoader.load(splitString[0], splitString[1])
-      .then(loadedModule => {
+    return this._ngModuleLoader.load(splitString[0], splitString[1]).then(loadedModule => {
       console.timeEnd(`ModuleLoader, load: ${modulePath}'`);
       const ref = loadedModule.create(this._injector);
 
+      const component = ref.injector.get(LAZY_LOADED_TOKEN);
+
+      this._cfrMap.set(component, ref.componentFactoryResolver);
+
       return {
         componentFactoryResolver: ref.componentFactoryResolver,
-          component: ref.injector.get(LAZY_LOADED_TOKEN)
+        component: component
       };
     });
   }
+
+  getComponentFactoryResolver(component: Type<any>) {
+    return this._cfrMap.get(component);
+  }
 }
 
 const SPLITTER = '#';