AbstractToolbarCommand.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.kie.workbench.common.stunner.client.widgets.toolbar.command;

import org.gwtbootstrap3.client.ui.constants.IconRotate;
import org.kie.workbench.common.stunner.client.widgets.toolbar.Toolbar;
import org.kie.workbench.common.stunner.client.widgets.toolbar.ToolbarCommand;
import org.kie.workbench.common.stunner.core.client.session.ClientSession;
import org.kie.workbench.common.stunner.core.client.session.command.ClientSessionCommand;
import org.kie.workbench.common.stunner.core.util.UUID;
import org.uberfire.ext.widgets.common.client.common.popups.YesNoCancelPopup;
import org.uberfire.mvp.Command;

public abstract class AbstractToolbarCommand<S extends ClientSession, C extends ClientSessionCommand<S>>
        implements ToolbarCommand<S> {

    private final String uuid;
    private final C command;
    private Toolbar<S> toolbar;

    protected AbstractToolbarCommand(final C command) {
        this.uuid = UUID.uuid();
        this.command = command;
        this.command.listen(this::checkState);
    }

    protected abstract boolean requiresConfirm();

    public ToolbarCommand<S> initialize(final Toolbar<S> toolbar,
                                        final S session) {
        this.toolbar = toolbar;
        this.command.bind(session);
        checkState();
        return this;
    }

    @Override
    public void execute() {

        if (requiresConfirm()) {
            this.executeWithConfirm(noOpCallback);
        } else {
            this.executeWithNoConfirm(noOpCallback);
        }
    }

    public <V> void execute(final ClientSessionCommand.Callback<V> callback) {
        if (requiresConfirm()) {
            this.executeWithConfirm(callback);
        } else {
            this.executeWithNoConfirm(callback);
        }
    }

    // TODO: I18n.
    protected String getConfirmMessage() {
        return "Are you sure?";
    }

    private <V> void executeWithConfirm(final ClientSessionCommand.Callback<V> callback) {
        final Command yesCommand = () -> {
            this.executeWithNoConfirm(callback);
        };
        final Command noCommand = () -> {
        };
        final YesNoCancelPopup popup = YesNoCancelPopup.newYesNoCancelPopup(getConfirmMessage(),
                                                                            null,
                                                                            yesCommand,
                                                                            noCommand,
                                                                            noCommand);
        popup.show();
    }

    protected void checkState() {
        if (command.isEnabled()) {
            enable();
        } else {
            disable();
        }
    }

    public void refresh() {
        checkState();
    }

    protected void executeWithConfirm(final Command command) {
        final Command yesCommand = () -> {
            command.execute();
        };
        final Command noCommand = () -> {
        };
        // TODO: I18n.
        final YesNoCancelPopup popup = YesNoCancelPopup.newYesNoCancelPopup("Are you sure?",
                                                                            null,
                                                                            yesCommand,
                                                                            noCommand,
                                                                            noCommand);
        popup.show();
    }

    @Override
    public boolean equals(final Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof AbstractToolbarCommand)) {
            return false;
        }
        AbstractToolbarCommand that = (AbstractToolbarCommand) o;
        return uuid.equals(that.uuid);
    }

    @Override
    public int hashCode() {
        return uuid == null ? 0 : ~~uuid.hashCode();
    }

    public String getUuid() {
        return uuid;
    }

    @Override
    public IconRotate getIconRotate() {
        return IconRotate.NONE;
    }

    @Override
    public void destroy() {
        doDestroy();
        this.command.unbind();
    }

    protected void doDestroy() {
        command.unbind();
    }

    protected void enable() {
        toolbar.enable(this);
    }

    protected void disable() {
        toolbar.disable(this);
    }

    private <V> void executeWithNoConfirm(final ClientSessionCommand.Callback<V> callback) {
        this.command.execute(callback);
    }

    private final ClientSessionCommand.Callback<Object> noOpCallback = new ClientSessionCommand.Callback<Object>() {
        @Override
        public void onSuccess() {
        }

        @Override
        public void onError(final Object error) {
        }
    };
}