Extend a Core Component extend-component

$ git clone git@github.com:adobe/aem-guides-wknd-spa.git
$ cd aem-guides-wknd-spa
$ git checkout Angular/extend-component-start

$ mvn clean install -PautoInstallSinglePackage

$ mvn clean install -PautoInstallSinglePackage -Pclassic

<?xml version="1.0" encoding="UTF-8"?>
<jcr:root xmlns:sling="http://sling.apache.org/jcr/sling/1.0" xmlns:cq="http://www.day.com/jcr/cq/1.0" xmlns:jcr="http://www.jcp.org/jcr/1.0"
    jcr:primaryType="cq:Component"
    jcr:title="Card"
    sling:resourceSuperType="wknd-spa-angular/components/image"
    componentGroup="WKND SPA Angular - Content"/>

<?xml version="1.0" encoding="UTF-8"?>
<jcr:root xmlns:sling="http://sling.apache.org/jcr/sling/1.0" xmlns:cq="http://www.day.com/jcr/cq/1.0" xmlns:jcr="http://www.jcp.org/jcr/1.0"
    jcr:primaryType="cq:Component"
    jcr:title="Image"
    sling:resourceSuperType="core/wcm/components/image/v2/image"
    componentGroup="WKND SPA Angular - Content"/>

<parameters
    jcr:primaryType="nt:unstructured"
    sling:resourceType="wknd-spa-angular/components/card"
    imageCrop=""
    imageMap=""
    imageRotate=""/>

MapTo('wknd-spa-angular/components/card')(CardComponent, CardEditConfig);

<div class="card"  *ngIf="hasContent">
    <app-image class="card__image" [src]="src" [alt]="alt" [title]="title"></app-image>
</div>

$ cd aem-guides-wknd-spa
$ mvn clean install -PautoInstallSinglePackage

@ProviderType
public interface Card extends Image {

    /***
    * The URL to populate the CTA button as part of the card.
    * The link should be based on the cardPath property that points to a page.
    * @return String URL
    */
    public String getCtaLinkURL();

    /***
    * The text to display on the CTA button of the card.
    * @return String CTA text
    */
    public String getCtaText();



    /***
    * The date to be displayed as part of the card.
    * This is based on the last modified date of the page specified by the cardPath
    * @return
    */
    public Calendar getCardLastModified();


    /**
    * Return the title of the page specified by cardPath if `titleFromPage` is set to true.
    * Otherwise return the value of `cardTitle`
    * @return
    */
    public String getCardTitle();
}

@Self
@Via(type = ResourceSuperType.class)
private Image image;

@Override
public String getSrc() {
    return null != image ? image.getSrc() : null;
}

@PostConstruct
public void initModel() {
    if(StringUtils.isNotBlank(cardPath) && pageManager != null) {
        cardPage = pageManager.getPage(this.cardPath);
    }
}

@ValueMapValue
private String cardPath;

@ValueMapValue
private String ctaText;

@ValueMapValue
private boolean titleFromPage;

@ValueMapValue
private String cardTitle;

@Override
public String getCtaLinkURL() {
    if(cardPage != null) {
        return cardPage.getPath() + ".html";
    }
    return null;
}

@Override
public String getCtaText() {
    return ctaText;
}

@Override
public Calendar getCardLastModified() {
   if(cardPage != null) {
       return cardPage.getLastModified();
   }
   return null;
}

@Override
public String getCardTitle() {
    if(titleFromPage) {
        return cardPage != null ? cardPage.getTitle() : null;
    }
    return cardTitle;
}

$ cd core/
$ mvn clean install -PautoInstallBundle

"card": {
    "ctaText": "Read More",
    "cardTitle": "Page 1",
    "title": "Woman chillaxing with river views in Australian bushland",
    "src": "/content/wknd-spa-angular/us/en/home/_jcr_content/root/responsivegrid/card.coreimg.jpeg/1595190732886/adobestock-216674449.jpeg",
    "alt": "Female sitting on a large rock relaxing in afternoon dappled light the Australian bushland with views over the river",
    "cardLastModified": 1591360492414,
    "ctaLinkURL": "/content/wknd-spa-angular/us/en/home/page-1.html",
    ":type": "wknd-spa-angular/components/card"
}

$ cd ui.frontend
$ npm install
$ npm start

export class CardComponent implements OnInit {

     @Input() src: string;
     @Input() alt: string;
     @Input() title: string;
+    @Input() cardTitle: string;
+    @Input() cardLastModified: number;
+    @Input() ctaLinkURL: string;
+    @Input() ctaText: string;

export class CardComponent implements OnInit {
    ...
    get hasCTA(): boolean {
        return this.ctaLinkURL && this.ctaLinkURL.trim().length > 0 && this.ctaText && this.ctaText.trim().length > 0;
    }

    get lastModifiedDate(): string {
        const lastModifiedDate = this.cardLastModified ? new Date(this.cardLastModified) : null;

        if (lastModifiedDate) {
        return lastModifiedDate.toLocaleDateString();
        }
        return null;
    }
    ...
}

<div class="card"  *ngIf="hasContent">
    <app-image class="card__image" [src]="src" [alt]="alt" [title]="title"></app-image>
    <div class="card__content">
        <h2 class="card__title">
            {{cardTitle}}
            <span class="card__lastmod" *ngIf="lastModifiedDate">{{lastModifiedDate}}</span>
        </h2>
        <div class="card__action-container" *ngIf="hasCTA">
            <a [routerLink]="ctaLinkURL" class="card__action-link" [title]="ctaText">
                {{ctaText}}
            </a>
        </div>
    </div>
</div>

$ cd aem-guides-wknd-spa
$ mvn clean install -PautoInstallSinglePackage