Move parsing functions for CC licenses to a utility file

Author: abelgomez

src/app/item-page/simple/field-components/specific-field/cc-license/item-page-cc-license-field.component.ts

@@ -10,6 +10,7 @@ import {
 import { TranslateModule } from '@ngx-translate/core';
 import { Item } from 'src/app/core/shared/item.model';
 import { MetadataFieldWrapperComponent } from 'src/app/shared/metadata-field-wrapper/metadata-field-wrapper.component';
+import { parseCcCode } from 'src/app/shared/utils/license.utils';
 
 @Component({
   selector: 'ds-item-page-cc-license-field',
@@ -59,23 +60,12 @@ export class ItemPageCcLicenseFieldComponent implements OnInit {
   showImage = true;
   imgSrc: string;
 
-  /**
-   * Parse a URI an return its CC code. URIs pointing to non-CC licenses will return null.
-   * @param uri
-   * @returns the CC code or null if uri is not a valid CC URI
-   */
-  public static parseCcCode(uri: string): string {
-    const regex = /.*creativecommons.org\/(licenses|publicdomain)\/([^/]+)/gm;
-    const matches = regex.exec(uri ?? '') ?? [];
-    return matches.length > 2 ? matches[2] : null;
-  }
-
   ngOnInit() {
     this.uri = this.item.firstMetadataValue(this.ccLicenseUriField);
     this.name = this.item.firstMetadataValue(this.ccLicenseNameField);
 
     // Extracts the CC license code from the URI
-    const ccCode = ItemPageCcLicenseFieldComponent.parseCcCode(this.uri);
+    const ccCode = parseCcCode(this.uri);
     this.imgSrc = ccCode ? `assets/images/cc-licenses/${ccCode}.png` : null;
   }
 }

src/app/item-page/simple/field-components/specific-field/license/item-page-license-field.component.ts

@@ -26,6 +26,7 @@ import {
 } from 'src/app/core/shared/operators';
 import { ItemPageCcLicenseFieldComponent } from 'src/app/item-page/simple/field-components/specific-field/cc-license/item-page-cc-license-field.component';
 import { MetadataFieldWrapperComponent } from 'src/app/shared/metadata-field-wrapper/metadata-field-wrapper.component';
+import { isCcLicense } from 'src/app/shared/utils/license.utils';
 
 @Component({
   selector: 'ds-item-page-license-field',
@@ -77,7 +78,7 @@ export class ItemPageLicenseFieldComponent implements OnInit, OnDestroy {
       getRemoteDataPayload(),
     ).subscribe((remoteData: ConfigurationProperty) => {
       const ccLicenseUriField = remoteData?.values && remoteData?.values?.length > 0 ? remoteData.values[0] : 'dc.rights.uri';
-      this.hasCcLicenseUri$ = of(!!ItemPageCcLicenseFieldComponent.parseCcCode(this.item.firstMetadataValue(ccLicenseUriField)));
+      this.hasCcLicenseUri$ = of(isCcLicense(this.item.firstMetadataValue(ccLicenseUriField)));
     }),
     );
 

src/app/shared/utils/license.utils.ts

@@ -0,0 +1,19 @@
+/**
+   * Parse a URI an return its CC code. URIs pointing to non-CC licenses will return null.
+   * @param uri
+   * @returns the CC code or null if uri is not a valid CC URI
+   */
+export function parseCcCode(uri: string): string {
+  const regex = /.*creativecommons.org\/(licenses|publicdomain)\/([^/]+)/gm;
+  const matches = regex.exec(uri ?? '') ?? [];
+  return matches.length > 2 ? matches[2] : null;
+}
+
+/**
+   * Returns whether a URI denotes a valid URI for CC licenses.
+   * @param uri
+   * @returns true if the URI corresponds to a reconigzable CC license URI or false otherwise
+   */
+export function isCcLicense(uri: string): boolean {
+  return !!parseCcCode(uri);
+}