src/app/core: add citation_doi tag to head meta

alanorth · alanorth · commit 8d7b4cd101c0 · 2025-03-05T16:40:12.000+03:00
This is used by harvesters like Altmetric and was present in DSpace
version 6 and previous.
diff --git a/src/app/core/metadata/metadata.service.ts b/src/app/core/metadata/metadata.service.ts
@@ -161,6 +161,7 @@ export class MetadataService {
     this.setCitationKeywordsTag();
 
     this.setCitationAbstractUrlTag();
+    this.setCitationDoiTag();
     this.setCitationPdfUrlTag();
     this.setCitationPublisherTag();
 
@@ -294,6 +295,18 @@ export class MetadataService {
     }
   }
 
+  /**
+   * Add <meta name="citation_doi" ... >  to the <head>
+   */
+  private setCitationDoiTag(): void {
+    if (this.currentObject.value instanceof Item) {
+      let doi = this.getMetaTagValue('dc.identifier.doi');
+      if (hasValue(doi)) {
+        this.addMetaTag('citation_doi', doi);
+      }
+    }
+  }
+
   /**
    * Add <meta name="citation_pdf_url" ... >  to the <head>
    */
