Dynamic Modals (#417)

* Move backdrop and click handler to modal service since they should not be used in web

* Add support for opening modals using ViewContainerRef

angular/src/components/modal/dynamic-modal.component.ts

@@ -0,0 +1,57 @@
+import {
+    AfterViewInit,
+    ChangeDetectorRef,
+    Component,
+    ComponentFactoryResolver,
+    ComponentRef,
+    ElementRef,
+    OnDestroy,
+    Type,
+    ViewChild,
+    ViewContainerRef
+} from '@angular/core';
+
+import { ModalRef } from './modal.ref';
+
+@Component({
+    selector: 'app-modal',
+    template: '<ng-template #modalContent></ng-template>',
+})
+export class DynamicModalComponent implements AfterViewInit, OnDestroy {
+    componentRef: ComponentRef<any>;
+
+    @ViewChild('modalContent', { read: ViewContainerRef, static: true }) modalContentRef: ViewContainerRef;
+
+    childComponentType: Type<any>;
+    setComponentParameters: (component: any) => void;
+
+    constructor(private componentFactoryResolver: ComponentFactoryResolver, private cd: ChangeDetectorRef,
+        private el: ElementRef<HTMLElement>, public modalRef: ModalRef) {}
+
+    ngAfterViewInit() {
+        this.loadChildComponent(this.childComponentType);
+        if (this.setComponentParameters != null) {
+            this.setComponentParameters(this.componentRef.instance);
+        }
+        this.cd.detectChanges();
+
+        this.modalRef.created(this.el.nativeElement);
+    }
+
+    loadChildComponent(componentType: Type<any>) {
+        const componentFactory = this.componentFactoryResolver.resolveComponentFactory(componentType);
+
+        this.modalContentRef.clear();
+        this.componentRef = this.modalContentRef.createComponent(componentFactory);
+    }
+
+    ngOnDestroy() {
+        if (this.componentRef) {
+            this.componentRef.destroy();
+        }
+    }
+
+    close() {
+        this.modalRef.close();
+    }
+}

angular/src/components/modal/modal-injector.ts

@@ -0,0 +1,15 @@
+import {
+    InjectFlags,
+    InjectionToken,
+    Injector,
+    Type
+} from '@angular/core';
+
+export class ModalInjector implements Injector {
+    constructor(private _parentInjector: Injector, private _additionalTokens: WeakMap<any, any>) {}
+
+    get<T>(token: Type<T> | InjectionToken<T>, notFoundValue?: T, flags?: InjectFlags): T;
+    get(token: any, notFoundValue?: any, flags?: any) {
+        return this._additionalTokens.get(token) ?? this._parentInjector.get<any>(token, notFoundValue);
+    }
+}

angular/src/components/modal/modal.ref.ts

@@ -0,0 +1,51 @@
+import { Observable, Subject } from 'rxjs';
+import { first } from 'rxjs/operators';
+
+export class ModalRef {
+
+    onCreated: Observable<HTMLElement>; // Modal added to the DOM.
+    onClose: Observable<any>;           // Initiated close.
+    onClosed: Observable<any>;          // Modal was closed (Remove element from DOM)
+    onShow: Observable<any>;            // Start showing modal
+    onShown: Observable<any>;           // Modal is fully visible
+
+    private readonly _onCreated = new Subject<HTMLElement>();
+    private readonly _onClose = new Subject<any>();
+    private readonly _onClosed = new Subject<any>();
+    private readonly _onShow = new Subject<any>();
+    private readonly _onShown = new Subject<any>();
+    private lastResult: any;
+
+    constructor() {
+        this.onCreated = this._onCreated.asObservable();
+        this.onClose = this._onClose.asObservable();
+        this.onClosed = this._onClosed.asObservable();
+        this.onShow = this._onShow.asObservable();
+        this.onShown = this._onShow.asObservable();
+    }
+
+    show() {
+        this._onShow.next();
+    }
+
+    shown() {
+        this._onShown.next();
+    }
+
+    close(result?: any) {
+        this.lastResult = result;
+        this._onClose.next(result);
+    }
+
+    closed() {
+        this._onClosed.next(this.lastResult);
+    }
+
+    created(el: HTMLElement) {
+        this._onCreated.next(el);
+    }
+
+    onClosedPromise(): Promise<any> {
+        return this.onClosed.pipe(first()).toPromise();
+    }
+}