Synnefo » Pithos Web Client

/*

 * Copyright 2011-2012 GRNET S.A. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

 * conditions are met:

 *

 *   1. Redistributions of source code must retain the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer.

 *

 *   2. Redistributions in binary form must reproduce the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer in the documentation and/or other materials

 *      provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * The views and conclusions contained in the software and

 * documentation are those of the authors and should not be

 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 */

package gr.grnet.pithos.web.client;

import com.google.gwt.core.client.GWT;

import com.google.gwt.core.client.Scheduler;

import com.google.gwt.dom.client.NativeEvent;

import com.google.gwt.event.dom.client.*;

import com.google.gwt.http.client.Response;

import com.google.gwt.i18n.client.DateTimeFormat;

import com.google.gwt.user.client.Command;

import com.google.gwt.user.client.Event.NativePreviewEvent;

import com.google.gwt.user.client.ui.*;

import gr.grnet.pithos.web.client.foldertree.Folder;

import gr.grnet.pithos.web.client.rest.PutRequest;

import gr.grnet.pithos.web.client.rest.RestException;

/**

 * The 'Folder properties' dialog box implementation.

 */

public class FolderPropertiesDialog extends DialogBox {

    protected Pithos app;

    /**

     * The widget that holds the folderName of the folder.

     */

    TextBox folderName = new TextBox();

    /**

     * A flag that denotes whether the dialog will be used to create or modify a

     * folder.

     */

    private final boolean create;

    final Folder folder;

    final VerticalPanel inner;

    /**

     * The widget's constructor.

     */

    public FolderPropertiesDialog(final Pithos app, boolean _create, Folder selected) {

        this.app = app;

        Anchor close = new Anchor("close");

        close.addStyleName("close");

        close.addClickHandler(new ClickHandler() {

            @Override

            public void onClick(ClickEvent event) {

                hide();

            }

        });

        setGlassEnabled(true);

        setStyleName("pithos-DialogBox");

        // Enable IE selection for the dialog (must disable it upon closing it)

        Pithos.enableIESelection();

        create = _create;

        folder = selected;

        // Use this opportunity to set the dialog's caption.

        if(create) {

            setText("Create folder");

        }

        else {

            setText("Folder properties");

        }

        // Outer contains inner and buttons

        VerticalPanel outer = new VerticalPanel();

        outer.add(close);

        // Inner contains generalPanel and permPanel

        inner = new VerticalPanel();

        inner.addStyleName("inner");

        VerticalPanel generalPanel = new VerticalPanel();

        FlexTable generalTable = new FlexTable();

        generalTable.setText(0, 0, "Name");

        generalTable.setText(1, 0, "Parent");

        generalTable.setText(2, 0, "Creator");

        generalTable.setText(3, 0, "Last modified");

        folderName.setText(create ? "" : folder.getName());

        folderName.setReadOnly(folder.isContainer() && !create);

        generalTable.setWidget(0, 1, folderName);

        final Label folderNameNote = new Label("Please note that slashes ('/') are not allowed in folder names.", true);

        folderNameNote.setVisible(false);

        folderNameNote.setStylePrimaryName("gss-readForAllNote");

        generalTable.setWidget(0, 2, folderNameNote);

        if(create) {

            generalTable.setText(1, 1, folder.getName());

        }

        else {

            generalTable.setText(1, 1, folder.getParent().getName());

        }

        if(create) {

            generalTable.setText(2, 1, app.getCurrentUserDisplayNameOrID());

        }

        else {

            final String ownerID = folder.getOwnerID();

            final String displayName = app.getUserDisplayNameByID(ownerID);

            final String ownerDisplayName;

            if(displayName == null) {

                // FIXME: Get the actual display name and do not use the id

                ownerDisplayName = ownerID;

            }

            else {

                ownerDisplayName = displayName;

            }

            generalTable.setText(2, 1, ownerDisplayName);

        }

        DateTimeFormat formatter = DateTimeFormat.getFormat("d/M/yyyy h:mm a");

        if(folder.getLastModified() != null) {

            generalTable.setText(3, 1, formatter.format(folder.getLastModified()));

        }

        generalTable.getFlexCellFormatter().setStyleName(0, 0, "props-labels");

        generalTable.getFlexCellFormatter().setStyleName(1, 0, "props-labels");

        generalTable.getFlexCellFormatter().setStyleName(2, 0, "props-labels");

        generalTable.getFlexCellFormatter().setStyleName(3, 0, "props-labels");

        generalTable.getFlexCellFormatter().setStyleName(0, 1, "props-values");

        generalTable.getFlexCellFormatter().setStyleName(1, 1, "props-values");

        generalTable.getFlexCellFormatter().setStyleName(2, 1, "props-values");

        generalTable.getFlexCellFormatter().setStyleName(3, 1, "props-values");

        generalTable.setCellSpacing(4);

        generalPanel.add(generalTable);

        inner.add(generalPanel);

        outer.add(inner);

        // Create the 'Create/Update' button, along with a listener that hides the dialog

        // when the button is clicked and quits the application.

        String okLabel;

        if(create) {

            okLabel = "Create";

        }

        else {

            okLabel = "Update";

        }

        final Button ok = new Button(okLabel, new ClickHandler() {

            @Override

            public void onClick(ClickEvent event) {

                createOrUpdateFolder();

                closeDialog();

            }

        });

        ok.addStyleName("button");

        outer.add(ok);

        outer.setCellHorizontalAlignment(inner, HasHorizontalAlignment.ALIGN_CENTER);

        folderName.addChangeHandler(new ChangeHandler() {

            @Override

            public void onChange(ChangeEvent event) {

                if(folderName.getText().contains("/")) {

                    folderNameNote.setVisible(true);

                    ok.setEnabled(false);

                }

                else {

                    folderNameNote.setVisible(false);

                    ok.setEnabled(true);

                }

            }

        });

        setWidget(outer);

    }

    @Override

    public void center() {

        super.center();

        folderName.setFocus(true);

    }

    @Override

    protected void onPreviewNativeEvent(NativePreviewEvent preview) {

        super.onPreviewNativeEvent(preview);

        NativeEvent evt = preview.getNativeEvent();

        if(evt.getType().equals(KeyDownEvent.getType().getName()))

        // Use the popup's key preview hooks to close the dialog when either

        // enter or escape is pressed.

        {

            switch(evt.getKeyCode()) {

                case KeyCodes.KEY_ENTER:

                    createOrUpdateFolder();

                    closeDialog();

                    break;

                case KeyCodes.KEY_ESCAPE:

                    closeDialog();

                    break;

            }

        }

    }

    /**

     * Enables IE selection prevention and hides the dialog

     * (we disable the prevention on creation of the dialog)

     */

    public void closeDialog() {

        Pithos.preventIESelection();

        hide();

    }

    /**

     * Generate an RPC request to create a new folder.

     */

    private void createFolder() {

        String name = folderName.getText().trim();

        if(name.length() == 0) {

            return;

        }

        String path = folder.getUri() + "/" + name;

        PutRequest createFolder = new PutRequest(app.getApiPath(), folder.getOwnerID(), path) {

            @Override

            public void onSuccess(Resource result) {

                app.updateFolder(folder, true, new Command() {

                    @Override

                    public void execute() {

                        app.updateStatistics();

                    }

                }, true);

            }

            @Override

            public void onError(Throwable t) {

                GWT.log("", t);

                app.setError(t);

                if(t instanceof RestException) {

                    app.displayError("Unable to create folder:" + ((RestException) t).getHttpStatusText());

                }

                else {

                    app.displayError("System error creating folder:" + t.getMessage());

                }

            }

            @Override

            protected void onUnauthorized(Response response) {

                app.sessionExpired();

            }

        };

        createFolder.setHeader("X-Auth-Token", app.getUserToken());

        createFolder.setHeader("Accept", "*/*");

        createFolder.setHeader("Content-Length", "0");

        createFolder.setHeader("Content-Type", "application/directory");

        Scheduler.get().scheduleDeferred(createFolder);

    }

    /**

     * Upon closing the dialog by clicking OK or pressing ENTER this method does

     * the actual work of modifying folder properties or creating a new Folder

     * depending on the value of the create field

     */

    protected void createOrUpdateFolder() {

        if(create) {

            createFolder();

        }

        else {

            updateFolder();

        }

    }

    private void updateFolder() {

        final String newName = folderName.getText().trim();

        if(newName.length() == 0) {

            return;

        }

        if(!folder.isContainer() && !folder.getName().equals(newName)) {

            final String path = folder.getParent().getUri() + "/" + newName;

            app.copyFolder(folder, folder.getOwnerID(), path, true, new Command() {

                @Override

                public void execute() {

                    app.updateFolder(folder.getParent(), false, new Command() {

                        @Override

                        public void execute() {

                            app.updateMySharedRoot();

                        }

                    }, true);

                }

            });

        }

        else {

            app.updateFolder(folder.getParent(), false, new Command() {

                @Override

                public void execute() {

                    app.updateMySharedRoot();

                }

            }, true);

        }

    }

}