package org.dashbuilder.common.client.editor.file;
import com.google.gwt.editor.client.EditorError;
import com.google.gwt.editor.client.HasEditorErrors;
import com.google.gwt.editor.client.LeafValueEditor;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.gwt.user.client.ui.Widget;
import org.dashbuilder.common.client.editor.LeafAttributeEditor;
import org.dashbuilder.common.client.resources.i18n.DashbuilderCommonConstants;
import org.gwtbootstrap3.client.ui.constants.Placement;
import org.uberfire.client.mvp.UberView;
import org.uberfire.workbench.events.NotificationEvent;
import javax.annotation.PostConstruct;
import javax.enterprise.context.Dependent;
import javax.enterprise.event.Event;
import javax.inject.Inject;
import java.util.List;
import static org.uberfire.workbench.events.NotificationEvent.NotificationType.ERROR;
import static org.uberfire.workbench.events.NotificationEvent.NotificationType.SUCCESS;
/**
* <p>Presenter for editor component that wraps a gwt bootstrap file upload component an additionally provides:</p>
* <ul>
* <li>Error messages - Show validation error messages.</li>
* <li>Dashbuilder File Upload Servlet integration - It uses the UF Dashbuilder servlet for uploading files and provides a listener to obtain the uploaded file path.</li>
* </ul>
*
* @since 0.4.0
*/
@Dependent
public class FileUploadEditor implements IsWidget, LeafAttributeEditor<String> {
public interface View extends UberView<FileUploadEditor> {
View addHelpContent(final String title, final String content, final Placement placement);
View setFileUploadName(String name);
View setFileUploadVisible(boolean visible);
View setFileLabelText(String text);
View setFileLabelVisible(boolean visible);
View setLoadingImageVisible(boolean visible);
String getFileName();
View setFormAction(String action);
View submit();
View showError(final SafeHtml message);
View clearError();
}
public interface FileUploadEditorCallback {
String getUploadFileName();
String getUploadFileUrl();
}
Event<NotificationEvent> workbenchNotification;
Event<org.dashbuilder.common.client.event.ValueChangeEvent<String>> valueChangeEvent;
public View view;
String value;
FileUploadEditorCallback callback;
@Inject
public FileUploadEditor(final Event<org.dashbuilder.common.client.event.ValueChangeEvent<String>> valueChangeEvent,
final Event<NotificationEvent> workbenchNotification,
final View view) {
this.valueChangeEvent = valueChangeEvent;
this.workbenchNotification = workbenchNotification;
this.view = view;
}
@PostConstruct
public void init() {
view.init(this);
view.setLoadingImageVisible(false);
view.setFileUploadName("fileUpload");
}
public void configure(final String fileUploadName, final FileUploadEditorCallback callback) {
view.setFileUploadName(fileUploadName);
this.callback = callback;
}
public void addHelpContent(final String title, final String content, final Placement placement) {
view.addHelpContent(title, content, placement);
}
@Override
public void showErrors(List<EditorError> errors) {
StringBuilder sb = new StringBuilder();
for (EditorError error : errors) {
if (error.getEditor() == this) {
sb.append("\n").append(error.getMessage());
}
}
boolean hasErrors = sb.length() > 0;
if (!hasErrors) {
view.clearError();
return;
}
// Show the errors.
view.showError(new SafeHtmlBuilder().appendEscaped(sb.substring(1)).toSafeHtml());
}
@Override
public Widget asWidget() {
return view.asWidget();
}
@Override
public void setValue(final String value) {
this.value = value;
if ( !isNullOrEmpty( view.getFileName() ) ) {
view.setFileLabelVisible(false);
} else if ( !isNullOrEmpty( value ) ) {
int slash = value.lastIndexOf( "/" ) != -1 ? value.lastIndexOf( "/" ) : value.lastIndexOf( "\\" );
if ( slash == -1 ) {
view.setFileLabelText( value );
} else {
view.setFileLabelText( value.substring( slash + 1 ) );
}
view.setFileLabelVisible(true);
}
}
@Override
public String getValue() {
return value;
}
String getUploadFileName() {
assert callback != null;
return callback.getUploadFileName();
}
String getUploadFileUrl() {
assert callback != null;
return callback.getUploadFileUrl();
}
boolean onSubmit() {
final String fileName = view.getFileName();
if ( isNullOrEmpty( fileName ) ) {
return false;
} else {
view.setFileUploadVisible(false);
view.setLoadingImageVisible(true);
}
return true;
}
void onSubmitComplete(final String results) {
view.clearError();
view.setFileUploadVisible(true);
view.setLoadingImageVisible(false);
onValueChanged(view.getFileName());
// Show wb notification.
if ( "OK".equalsIgnoreCase( results ) ) {
workbenchNotification.fire(new NotificationEvent(DashbuilderCommonConstants.INSTANCE.uploadSuccessful(), SUCCESS));
} else if ( "FAIL".equalsIgnoreCase( results ) ) {
workbenchNotification.fire(new NotificationEvent(DashbuilderCommonConstants.INSTANCE.uploadFailed(), ERROR));
} else if ( "FAIL - ALREADY EXISTS".equalsIgnoreCase( results ) ) {
workbenchNotification.fire(new NotificationEvent(DashbuilderCommonConstants.INSTANCE.uploadFailedAlreadyExists(), ERROR));
}
}
void fileUploadHandler() {
final String _f = getUploadFileName();
final String _a = getUploadFileUrl();
view.setFormAction( _a );
setValue( _f );
view.setFileLabelVisible(false);
view.submit();
}
private boolean isNullOrEmpty( final String fileName ) {
return fileName == null || "".equals( fileName );
}
void onValueChanged(final String value) {
// Check value is not same one as current.
if (this.value != null && this.value.equals(value)) return;
// Clear error messages on the view.
view.clearError();
// Set the new value.
String before = this.value;
this.value = value;
// Fire the value change event.
valueChangeEvent.fire(new org.dashbuilder.common.client.event.ValueChangeEvent<String>(this, before, this.value));
}
}