src/main/java/com/primefactorsolutions/views/DocumentView.java

@@ -42,6 +42,7 @@ public class DocumentView extends BeanValidationForm<Document> implements HasUrl
     private final EmployeeService employeeService;
     private final AuthenticationContext authContext;
     private boolean fileUploaded = false;
+    private Button saveButton;
 
     public DocumentView(final DocumentService documentService,
                         final EmployeeService employeeService,
@@ -83,7 +84,7 @@ public class DocumentView extends BeanValidationForm<Document> implements HasUrl
     }
 
     protected  Button createSaveButton() {
-        Button saveButton = new Button("Save");
+        saveButton = new Button("Save");
         saveButton.addClickListener(event -> saveDocument());
         return saveButton;
     }
@@ -110,13 +111,18 @@ public class DocumentView extends BeanValidationForm<Document> implements HasUrl
 
     private void saveDocument() {
         if (isFormValid()) {
-            Document document = createDocument();
+            Document document = getEntity();  // Obtenemos el documento actual del formulario
+            document.setFileName(fileName.getValue());
+            document.setDocumentType(documentType.getValue());
             document.setEmployee(employeeComboBox.getValue());
+            document.setFileData(readFileData());  // Actualizamos el archivo si es necesario
+
             authContext.getAuthenticatedUser(UserDetails.class).ifPresent(user -> {
                 String creator = user.getUsername();
-                document.setCreator(creator);  // Asignar el nombre del creador al documento
+                document.setCreator(creator);  // Asignar el nombre del creador al documento si corresponde
             });
-            documentService.saveDocument(document);
+
+            documentService.saveDocument(document);  // Guardamos el documento actualizado
             Notification.show("File saved successfully.");
             clearForm();
         } else {
@@ -155,6 +161,18 @@ public class DocumentView extends BeanValidationForm<Document> implements HasUrl
         fileUploaded = false;
     }
 
+    private void checkFormModifications() {
+        boolean hasModifications = !fileName.isEmpty()
+                && documentType.getValue() != null
+                && employeeComboBox.getValue() != null;
+
+        if (hasModifications || fileUploaded) {
+            saveButton.setEnabled(true);
+        } else {
+            saveButton.setEnabled(false);
+        }
+    }
+
 
     @Override
     public void setParameter(final BeforeEvent beforeEvent, final String action) {
@@ -166,7 +184,8 @@ public class DocumentView extends BeanValidationForm<Document> implements HasUrl
         } else {
             UUID documentId = UUID.fromString(s);
             var document = documentService.getDocument(documentId);
-            setEntityWithEnabledSave(document);
+            setEntity(document);
+            employeeComboBox.setValue(document.getEmployee());
 
             if ("edit".equals(action) && !s.isEmpty()) {
                 setFieldsReadOnly(false);
@@ -174,6 +193,7 @@ public class DocumentView extends BeanValidationForm<Document> implements HasUrl
                 setFieldsReadOnly(true);
             }
         }
+        checkFormModifications();
     }
 
     private void setFieldsReadOnly(final boolean option) {

src/main/java/com/primefactorsolutions/views/DocumentsListView.java

@@ -8,16 +8,20 @@ import com.primefactorsolutions.service.EmployeeService;
 import com.vaadin.flow.component.button.Button;
 import com.vaadin.flow.component.combobox.ComboBox;
 import com.vaadin.flow.component.grid.GridSortOrder;
+import com.vaadin.flow.component.html.Anchor;
 import com.vaadin.flow.component.html.Main;
 import com.vaadin.flow.component.html.Span;
 import com.vaadin.flow.data.provider.SortDirection;
 import com.vaadin.flow.router.PageTitle;
 import com.vaadin.flow.router.Route;
+import com.vaadin.flow.server.StreamRegistration;
+import com.vaadin.flow.server.StreamResource;
 import com.vaadin.flow.spring.annotation.SpringComponent;
 import jakarta.annotation.security.PermitAll;
 import org.springframework.context.annotation.Scope;
 import org.vaadin.firitin.components.grid.PagingGrid;
 
+import java.io.ByteArrayInputStream;
 import java.util.Base64;
 import java.util.List;
 
@@ -138,23 +142,14 @@ public class DocumentsListView extends Main {
     }
 
     private void downloadDocument(final Document document) {
-        String base64Data = Base64.getEncoder().encodeToString(document.getFileData());
+        StreamResource resource = new StreamResource(document.getFileName(),
-        String jsCode = "var byteCharacters = atob('" + base64Data + "');"
+                () -> new ByteArrayInputStream(document.getFileData()));
-                + "var byteNumbers = new Array(byteCharacters.length);"
+        resource.setContentType("application/pdf");
-                + "for (var i = 0; i < byteCharacters.length; i++) {"
+        resource.setHeader("Content-Disposition", "attachment; filename=\"" + document.getFileName() + ".pdf\"");
-                + "    byteNumbers[i] = byteCharacters.charCodeAt(i);"
+        getUI().ifPresent(ui -> {
-                + "}"
+            StreamRegistration registration = ui.getSession().getResourceRegistry().registerResource(resource);
-                + "var byteArray = new Uint8Array(byteNumbers);"
+            ui.getPage().open(registration.getResourceUri().toString());
-                + "var blob = new Blob([byteArray], { type: 'application/pdf' });"
+        });
-                + "var url = URL.createObjectURL(blob);"
-                + "var a = document.createElement('a');"
-                + "a.href = url;"
-                + "a.download = '" + document.getFileName() + "';"
-                + "document.body.appendChild(a);"
-                + "a.click();"
-                + "document.body.removeChild(a);"
-                + "URL.revokeObjectURL(url);";
-        getElement().executeJs(jsCode);
     }
 
     @FunctionalInterface