A quick experiment - adding the remaining quota and/or number of files limit to the /storageDriver API, if present.

Author: landreev

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

@@ -110,6 +110,7 @@
 import static jakarta.ws.rs.core.Response.Status.BAD_REQUEST;
 import static jakarta.ws.rs.core.Response.Status.NOT_FOUND;
 import static jakarta.ws.rs.core.Response.Status.FORBIDDEN;
+import java.math.BigDecimal;
 
 @Path("datasets")
 public class Datasets extends AbstractApiBean {
@@ -3662,7 +3663,37 @@ public Response getFileStore(@Context ContainerRequestContext crc, @PathParam("i
             return error(Response.Status.NOT_FOUND, "No such dataset");
         }
 
-        return ok(JsonPrinter.jsonStorageDriver(dataset.getEffectiveStorageDriverId(), dataset));
+        JsonObjectBuilder output = JsonPrinter.jsonStorageDriver(dataset.getEffectiveStorageDriverId(), dataset); 
+        
+        // Add optional elements - storage size and file count limits, if present:
+        
+        Long storageSizeQuotaRemaining = null; 
+        
+        if (systemConfig.isStorageQuotasEnforced()) {            
+            UploadSessionQuotaLimit uploadSessionQuota = fileService.getUploadSessionQuotaLimit(dataset);
+            if (uploadSessionQuota != null) {
+                storageSizeQuotaRemaining = uploadSessionQuota.getRemainingQuotaInBytes();
+            }
+        }
+        
+        Integer numberOfFilesRemaining = null; 
+        
+        Integer effectiveFileCountLimit = dataset.getEffectiveDatasetFileCountLimit();
+        
+        if (effectiveFileCountLimit != null) {
+            numberOfFilesRemaining = effectiveFileCountLimit - datasetService.getDataFileCountByOwner(dataset.getId());
+        }
+        
+        if (storageSizeQuotaRemaining != null) {
+            output.add("storageQuotaRemaining", storageSizeQuotaRemaining);
+        }
+        
+        if (numberOfFilesRemaining != null) {
+            output.add("numberOfFilesRemaining", numberOfFilesRemaining);
+        }
+        
+        
+        return ok(output);
     }
 
     @PUT