Extend the API for dataverse facets retrieval (#10727)

* Added: list dataverse facets API endpoint extended to include details

* Added: docs for listFacets dataverses API endpoint

* Added: API endpoint for getting all facetable field types

* Changed: API endpoint route for obtaining facetables dataset fields

* Changed: DatasetFieldServiceApi format reset

* Added: docs for #10726

* Added: release notes for #10726

* Added: IT test case for listing Dataverse facets

doc/release-notes/10726-dataverse-facets-api-extension.md

@@ -0,0 +1,3 @@
+New optional query parameter "returnDetails" added to "dataverses/{identifier}/facets/" endpoint to include detailed information of each DataverseFacet.
+
+New endpoint "datasetfields/facetables" that lists all facetable dataset fields defined in the installation.

doc/sphinx-guides/source/api/native-api.rst

@@ -224,6 +224,22 @@ The fully expanded example above (without environment variables) looks like this
 
   curl -H "X-Dataverse-key:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" "https://demo.dataverse.org/api/dataverses/root/facets"
 
+By default, this endpoint will return an array including the facet names. If more detailed information is needed, we can set the query parameter ``returnDetails`` to ``true``, which will return the display name and id in addition to the name for each facet:
+
+.. code-block:: bash
+
+  export API_TOKEN=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+  export SERVER_URL=https://demo.dataverse.org
+  export ID=root
+
+  curl -H "X-Dataverse-key:$API_TOKEN" "$SERVER_URL/api/dataverses/$ID/facets?returnDetails=true"
+
+The fully expanded example above (without environment variables) looks like this:
+
+.. code-block:: bash
+
+  curl -H "X-Dataverse-key:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" "https://demo.dataverse.org/api/dataverses/root/facets?returnDetails=true"
+
 Set Facets for a Dataverse Collection
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -4717,6 +4733,28 @@ The fully expanded example above (without environment variables) looks like this
 
   curl "https://demo.dataverse.org/api/metadatablocks/citation"
 
+.. _dataset-fields-api:
+
+Dataset Fields
+--------------
+
+List All Facetable Dataset Fields
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+List all facetable dataset fields defined in the installation.
+
+.. code-block:: bash
+
+  export SERVER_URL=https://demo.dataverse.org
+
+  curl "$SERVER_URL/api/datasetfields/facetables"
+
+The fully expanded example above (without environment variables) looks like this:
+
+.. code-block:: bash
+
+  curl "https://demo.dataverse.org/api/datasetfields/facetables"
+
 .. _Notifications:
 
 Notifications

src/main/java/edu/harvard/iq/dataverse/api/DatasetFields.java

@@ -0,0 +1,29 @@
+package edu.harvard.iq.dataverse.api;
+
+import edu.harvard.iq.dataverse.DatasetFieldServiceBean;
+import edu.harvard.iq.dataverse.DatasetFieldType;
+import jakarta.ejb.EJB;
+import jakarta.ws.rs.*;
+import jakarta.ws.rs.core.Response;
+
+import java.util.List;
+
+import static edu.harvard.iq.dataverse.util.json.JsonPrinter.jsonDatasetFieldTypes;
+
+/**
+ * Api bean for managing dataset fields.
+ */
+@Path("datasetfields")
+@Produces("application/json")
+public class DatasetFields extends AbstractApiBean {
+
+    @EJB
+    DatasetFieldServiceBean datasetFieldService;
+
+    @GET
+    @Path("facetables")
+    public Response listAllFacetableDatasetFields() {
+        List<DatasetFieldType> datasetFieldTypes = datasetFieldService.findAllFacetableFieldTypes();
+        return ok(jsonDatasetFieldTypes(datasetFieldTypes));
+    }
+}

src/main/java/edu/harvard/iq/dataverse/api/Dataverses.java

@@ -849,22 +849,29 @@ public Response setMetadataRoot(@Context ContainerRequestContext crc, @PathParam
     /**
      * return list of facets for the dataverse with alias `dvIdtf`
      */
-    public Response listFacets(@Context ContainerRequestContext crc, @PathParam("identifier") String dvIdtf) {
+    public Response listFacets(@Context ContainerRequestContext crc,
+                               @PathParam("identifier") String dvIdtf,
+                               @QueryParam("returnDetails") boolean returnDetails) {
         try {
-            User u = getRequestUser(crc);
-            DataverseRequest r = createDataverseRequest(u);
+            User user = getRequestUser(crc);
+            DataverseRequest request = createDataverseRequest(user);
             Dataverse dataverse = findDataverseOrDie(dvIdtf);
-            JsonArrayBuilder fs = Json.createArrayBuilder();
-            for (DataverseFacet f : execCommand(new ListFacetsCommand(r, dataverse))) {
-                fs.add(f.getDatasetFieldType().getName());
+            List<DataverseFacet> dataverseFacets = execCommand(new ListFacetsCommand(request, dataverse));
+
+            if (returnDetails) {
+                return ok(jsonDataverseFacets(dataverseFacets));
+            } else {
+                JsonArrayBuilder facetsBuilder = Json.createArrayBuilder();
+                for (DataverseFacet facet : dataverseFacets) {
+                    facetsBuilder.add(facet.getDatasetFieldType().getName());
+                }
+                return ok(facetsBuilder);
             }
-            return ok(fs);
         } catch (WrappedResponse e) {
             return e.getResponse();
         }
     }
 
-
     @GET
     @AuthRequired
     @Path("{identifier}/featured")