DefaultPreferenceForm.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.uberfire.ext.preferences.client.central.form;

import java.util.Map;
import javax.enterprise.event.Observes;
import javax.inject.Inject;

import org.jboss.errai.ui.client.local.api.IsElement;
import org.jboss.errai.ui.client.local.spi.TranslationService;
import org.uberfire.client.annotations.WorkbenchPartTitle;
import org.uberfire.client.annotations.WorkbenchPartView;
import org.uberfire.client.annotations.WorkbenchScreen;
import org.uberfire.client.mvp.UberElement;
import org.uberfire.ext.preferences.client.event.HierarchyItemFormInitializationEvent;
import org.uberfire.ext.preferences.client.event.PreferencesCentralSaveEvent;
import org.uberfire.ext.preferences.client.event.PreferencesCentralUndoChangesEvent;
import org.uberfire.ext.properties.editor.model.PropertyEditorCategory;
import org.uberfire.ext.properties.editor.model.PropertyEditorChangeEvent;
import org.uberfire.ext.properties.editor.model.PropertyEditorEvent;
import org.uberfire.ext.properties.editor.model.PropertyEditorFieldInfo;
import org.uberfire.ext.properties.editor.model.PropertyEditorType;
import org.uberfire.lifecycle.OnStartup;
import org.uberfire.mvp.PlaceRequest;
import org.uberfire.preferences.shared.PropertyFormType;
import org.uberfire.preferences.shared.bean.BasePreferencePortable;
import org.uberfire.preferences.shared.bean.PreferenceHierarchyElement;

@WorkbenchScreen(identifier = DefaultPreferenceForm.IDENTIFIER)
public class DefaultPreferenceForm {

    public static final String IDENTIFIER = "org.uberfire.ext.preferences.client.central.form.DefaultPreferenceForm";
    private final View view;
    private TranslationService translationService;
    private String id;
    private String title;
    private BasePreferencePortable<?> preference;
    private PropertyEditorCategory category;
    private PreferenceHierarchyElement<?> hierarchyElement;

    @Inject
    public DefaultPreferenceForm(final View view,
                                 final TranslationService translationService) {
        this.view = view;
        this.translationService = translationService;
    }

    @OnStartup
    public void onStartup(final PlaceRequest placeRequest) {
        id = placeRequest.getParameter("id",
                                       null);
        title = placeRequest.getParameter("title",
                                          null);
    }

    @WorkbenchPartTitle
    public String getTitle() {
        return title;
    }

    @WorkbenchPartView
    public IsElement getView() {
        return view;
    }

    public void hierarchyItemFormInitializationEvent(@Observes HierarchyItemFormInitializationEvent event) {
        if (preference == null && event.getItemId().equals(id)) {
            preference = event.getPreference();
            hierarchyElement = event.getHierarchyElement();
            view.init(this);
        }
    }

    public PropertyEditorEvent generatePropertyEditorEvent() {
        if (category == null) {
            createPropertiesEditorCategory();
        }

        PropertyEditorEvent event = new PropertyEditorEvent(id,
                                                            category);
        return event;
    }

    private void createPropertiesEditorCategory() {
        category = new PropertyEditorCategory("Properties");
        category.setIdEvent(id);

        for (Map.Entry<String, PropertyFormType> property : preference.getPropertiesTypes().entrySet()) {
            final String propertyName = property.getKey();
            final PropertyEditorType propertyType = getPropertyEditorType(property.getValue());
            final Object propertyValue = preference.get(propertyName);

            final PropertyEditorFieldInfo fieldInfo = new PropertyEditorFieldInfo(translationService.format(hierarchyElement.getBundleKeyByProperty().get(property.getKey())),
                                                                                  propertyValue != null ? propertyValue.toString() : "",
                                                                                  propertyType);
            category.withField(fieldInfo.withKey(propertyName));
        }
    }

    public void propertyChanged(@Observes PropertyEditorChangeEvent event) {
        if (event.getProperty().getEventId().equals(id)) {
            final String propertyName = event.getProperty().getKey();
            final PropertyFormType propertyType = preference.getPropertyType(propertyName);
            final Object newValue = propertyType.fromString(event.getNewValue());

            preference.set(propertyName,
                           newValue);
        }
    }

    public void saveEvent(@Observes PreferencesCentralSaveEvent event) {
        createPropertiesEditorCategory();
        view.init(this);
    }

    public void undoEvent(@Observes PreferencesCentralUndoChangesEvent event) {
        category.undo();
        view.init(this);
    }

    public BasePreferencePortable<?> getPreference() {
        return preference;
    }

    public PropertyEditorType getPropertyEditorType(PropertyFormType propertyFormType) {
        return PropertyEditorType.valueOf(propertyFormType.name());
    }

    public interface View extends UberElement<DefaultPreferenceForm>,
                                  IsElement {

    }
}