DeleteKeystoreHandler.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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 com.motorolamobility.studio.android.certmanager.command;

import java.util.List;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler2;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialogWithToggle;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

import com.motorolamobility.studio.android.certmanager.i18n.CertificateManagerNLS;
import com.motorolamobility.studio.android.certmanager.ui.model.ITreeNode;
import com.motorolamobility.studio.android.certmanager.ui.model.KeyStoreNode;
import com.motorolamobility.studio.android.certmanager.ui.model.SigningAndKeysModelManager;
import com.motorolamobility.studio.android.certmanager.views.KeystoreManagerView;

/**
 * This class deletes the keystore from the tree of the {@link KeystoreManagerView}
 * */
public class DeleteKeystoreHandler extends AbstractHandler2 implements IHandler2
{

    private static boolean toggleState = false;

    /*
     * Question dialog confirming deletion of the keystore with a toggle
     * asking if the keystore should also be deleted from the filesystem
     * @return true if the deletion is confirmed, false otherwise and true in the
     * toggleState if it can also be deleted from the filesystem, false otherwise
     */
    private boolean showQuestion(List<ITreeNode> nodesToDelete)
    {

        final Boolean[] reply = new Boolean[2];

        final String keystoreName =
                nodesToDelete.size() == 1 ? nodesToDelete.get(0).getName() : null;

        PlatformUI.getWorkbench().getDisplay().syncExec(new Runnable()
        {
            @Override
            public void run()
            {
                IWorkbench workbench = PlatformUI.getWorkbench();
                IWorkbenchWindow ww = workbench.getActiveWorkbenchWindow();
                Shell shell = ww.getShell();

                MessageDialogWithToggle dialog =
                        MessageDialogWithToggle
                                .openYesNoQuestion(
                                        shell,
                                        CertificateManagerNLS.DeleteKeystoreHandler_ConfirmationQuestionDialog_Title,
                                        keystoreName != null
                                                ? CertificateManagerNLS
                                                        .bind(CertificateManagerNLS.DeleteKeystoreHandler_ConfirmationQuestionDialog_Description,
                                                                keystoreName)
                                                : CertificateManagerNLS.DeleteKeystoreHandler_Delete_Selected_Keystores,
                                        CertificateManagerNLS.DeleteKeystoreHandler_ConfirmationQuestionDialog_Toggle,
                                        false, null, null);
                reply[0] = (dialog.getReturnCode() == IDialogConstants.YES_ID);
                reply[1] = dialog.getToggleState();
            }
        });

        toggleState = reply[1];

        return reply[0];
    }

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException
    {
        List<ITreeNode> nodesToDelete = getSelection();

        if (!nodesToDelete.isEmpty())
        {
            boolean shouldProceed = showQuestion(nodesToDelete);
            if (shouldProceed)
            {
                for (ITreeNode node2Delete : nodesToDelete)
                {
                    KeyStoreNode keyStoreNode = (KeyStoreNode) node2Delete;

                    // remove from the tree
                    SigningAndKeysModelManager.getInstance().unmapKeyStore(keyStoreNode);

                    if (toggleState)
                    {
                        keyStoreNode.getFile().delete();
                    }
                }
            }
        }

        nodesToDelete.clear();

        return null;
    }

}