import { Injectable, Type, ViewContainerRef, ApplicationRef, ComponentFactory, ComponentFactoryResolver, ComponentRef } from '@angular/core'; import { ModalModel, ButtonModel } from 'app/models'; import { ModalComponent } from 'app/ng2/components/modal/modal.component'; @Injectable() export class ModalService { currentModal: ComponentRef; constructor(private componentFactoryResolver: ComponentFactoryResolver, private applicationRef: ApplicationRef) { } /* Shortcut method to open an alert modal with title, message, and close button that simply closes the modal. */ public openAlertModal(title: string, message: string, closeButtonText?:string) { let closeButton: ButtonModel = new ButtonModel(closeButtonText || 'Close', 'grey', this.closeCurrentModal); let modalModel: ModalModel = new ModalModel('sm', title, message, [closeButton], 'alert'); this.createCustomModal(modalModel).instance.open(); } /** * Shortcut method to open a basic modal with title, message, and an action button with callback, as well as close button. * NOTE: To close the modal from within the callback, use modalService.closeCurrentModal() //if you run into zone issues with callbacks see:https://stackoverflow.com/questions/36566698/how-to-dynamically-create-bootstrap-modals-as-angular2-components * NOTE: To add dynamic content to the modal, use modalService.addDynamicContentToModal(). First param is the return value of this function -- componentRef. * @param title Heading for modal * @param message Message for modal * @param actionButtonText Blue call to action button * @param actionButtonCallback function to invoke when button is clicked * @param cancelButtonText text for close/cancel button */ public createActionModal = (title: string, message: string, actionButtonText: string, actionButtonCallback: Function, cancelButtonText: string): ComponentRef => { let actionButton: ButtonModel = new ButtonModel(actionButtonText, 'blue', actionButtonCallback); let cancelButton: ButtonModel = new ButtonModel(cancelButtonText, 'grey', this.closeCurrentModal); let modalModel: ModalModel = new ModalModel('sm', title, message, [actionButton, cancelButton]); let modalInstance: ComponentRef = this.createCustomModal(modalModel); return modalInstance; } public createErrorModal = (closeButtonText?: string, errorMessage?: string):ComponentRef => { let closeButton: ButtonModel = new ButtonModel(closeButtonText || 'Close', 'grey', this.closeCurrentModal); let modalModel: ModalModel = new ModalModel('sm', 'Error', errorMessage, [closeButton], 'error'); let modalInstance: ComponentRef = this.createCustomModal(modalModel); return modalInstance; } /* Use this method to create a modal with title, message, and completely custom buttons. Use response.instance.open() to open */ public createCustomModal = (customModalData: ModalModel): ComponentRef => { let customModal: ComponentRef = this.createDynamicComponent(ModalComponent); customModal.instance.input = customModalData; this.currentModal = customModal; return customModal; } public closeCurrentModal = () => { if (!this.currentModal) return; this.currentModal.instance.close(); this.currentModal.destroy(); } public addDynamicContentToModal = (modalInstance: ComponentRef, dynamicComponentType: Type, dynamicComponentInput: any) => { let dynamicContent = this.createDynamicComponent(dynamicComponentType, modalInstance.instance.dynamicContentContainer); dynamicContent.instance.input = dynamicComponentInput; modalInstance.instance.dynamicContent = dynamicContent; return modalInstance; } //Creates a component dynamically (aka during runtime). If a view container is not specified, it will append the new component to the app root. //To subscribe to an event from invoking component: componentRef.instance.clicked.subscribe((m) => console.log(m.name)); private createDynamicComponent(componentType: Type, viewContainerRef?:ViewContainerRef): ComponentRef { viewContainerRef = viewContainerRef || this.getRootViewContainerRef(); viewContainerRef.clear(); let factory: ComponentFactory = this.componentFactoryResolver.resolveComponentFactory(componentType); //Ref: https://angular.io/guide/dynamic-component-loader let componentRef = viewContainerRef.createComponent(factory); return componentRef; } private getRootViewContainerRef(): ViewContainerRef { return this.applicationRef.components[0].instance.viewContainerRef; } }