Synnefo » Pithos

/*

 * Copyright 2011 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.Scheduler;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

import java.util.Iterator;

import java.util.Map;

/**

 * The 'Folder properties' dialog box implementation.

 */

public class FolderPropertiesDialog extends DialogBox {

    protected Pithos app;

        /**

         * The widget that holds the folderName of the folder.

         */

        private TextBox folderName = new TextBox();

        /**

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

         * folder.

         */

        private final boolean create;

        protected PermissionsList permList;

        final Folder folder;

        final TabPanel inner;

        /**

         * The widget's constructor.

         */

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

        this.app = app;

                setAnimationEnabled(true);

                // 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();

                // Inner contains generalPanel and permPanel

                inner = new DecoratedTabPanel();

                inner.setAnimationEnabled(true);

                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);

        if (create)

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

        else

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

        generalTable.setText(2, 1, "");

        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, "General");

        VerticalPanel permPanel = new VerticalPanel();

        FilePropertiesDialog.Images images = GWT.create(FilePropertiesDialog.Images.class);

        boolean permsReadonly = folder.getInheritedPermissionsFrom() != null || folder.existChildrenPermissions();

        permList = new PermissionsList(images, folder.getPermissions(), folder.getOwner(), permsReadonly);

        permPanel.add(permList);

        if (!permsReadonly) {

            HorizontalPanel permButtons = new HorizontalPanel();

            Button add = new Button("Add Group", new ClickHandler() {

                @Override

                public void onClick(@SuppressWarnings("unused") ClickEvent event) {

                    PermissionsAddDialog dlg = new PermissionsAddDialog(app, app.getAccount().getGroups(), permList, false);

                    dlg.center();

                }

            });

            permButtons.add(add);

            permButtons.setCellHorizontalAlignment(add, HasHorizontalAlignment.ALIGN_CENTER);

            Button addUser = new Button("Add User", new ClickHandler() {

                @Override

                public void onClick(@SuppressWarnings("unused") ClickEvent event) {

                    PermissionsAddDialog dlg = new PermissionsAddDialog(app, app.getAccount().getGroups(), permList, true);

                    dlg.center();

                }

            });

            addUser.getElement().setId("folderPropertiesDialog.button.addUser");

            permButtons.add(addUser);

            permButtons.setCellHorizontalAlignment(addUser, HasHorizontalAlignment.ALIGN_CENTER);

            permButtons.setSpacing(8);

            permButtons.addStyleName("gss-TabPanelBottom");

            permPanel.add(permButtons);

        }

        if (!create)

            inner.add(permPanel, "Sharing");

        inner.selectTab(0);

        outer.add(inner);

        HorizontalPanel buttons = new HorizontalPanel();

                // 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";

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

                        @Override

                        public void onClick(@SuppressWarnings("unused") ClickEvent event) {

                                createOrUpdateFolder();

                                closeDialog();

                        }

                });

                buttons.add(ok);

                buttons.setCellHorizontalAlignment(ok, HasHorizontalAlignment.ALIGN_CENTER);

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

                // dialog

                // when the button is clicked.

                Button cancel = new Button("Cancel", new ClickHandler() {

                        @Override

                        public void onClick(@SuppressWarnings("unused") ClickEvent event) {

                                closeDialog();

                        }

                });

                buttons.add(cancel);

                buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);

                buttons.setSpacing(8);

                buttons.addStyleName("pithos-TabPanelBottom");

        outer.add(buttons);

        outer.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);

        outer.addStyleName("pithos-TabPanelBottom");

        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();

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

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

            @Override

            public void onSuccess(@SuppressWarnings("unused") Resource result) {

                app.updateFolder(folder, true, null);

            }

            @Override

            public void onError(Throwable t) {

                                GWT.log("", t);

                                if (t instanceof RestException) {

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

                                }

                                else

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

            }

        };

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

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

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

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

        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 Map<String, Boolean[]> perms = (permList.hasChanges() ? permList.getPermissions() : null);

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

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

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

            PutRequest newFolder = new PutRequest(app.getApiPath(), app.getUsername(), path) {

                @Override

                public void onSuccess(@SuppressWarnings("unused") Resource result) {

                    Iterator<File> iter = folder.getFiles().iterator();

                    app.copyFiles(iter, folder.getParent().getUri() + "/" + newName, new Command() {

                        @Override

                        public void execute() {

                            Iterator<Folder> iterf = folder.getSubfolders().iterator();

                            app.copySubfolders(iterf, folder.getParent().getUri() + "/" + newName, new Command() {

                                @Override

                                public void execute() {

                                    app.deleteFolder(folder);

                                    updateMetadata(path + "?update=", perms);

                                }

                            });

                        }

                    });

                }

                @Override

                public void onError(Throwable t) {

                    GWT.log("", t);

                    if(t instanceof RestException){

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

                    }

                    else

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

                }

            };

            newFolder.setHeader("X-Auth-Token", app.getToken());

            newFolder.setHeader("Content-Type", "application/folder");

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

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

            Scheduler.get().scheduleDeferred(newFolder);

        }

        else

            updateMetadata(folder.getUri() + "?update=", perms);

        }

        protected void updateMetadata(final String path, final Map<String, Boolean[]> newPermissions) {

        if (newPermissions != null) {

            PostRequest updateFolder = new PostRequest(app.getApiPath(), folder.getOwner(), path) {

                @Override

                public void onSuccess(@SuppressWarnings("unused") Resource result) {

                    app.updateFolder(folder.getParent(), false, null);

                }

                @Override

                public void onError(Throwable t) {

                    GWT.log("", t);

                    if (t instanceof RestException) {

                            if (((RestException) t).getHttpStatusCode() == Response.SC_NOT_FOUND) { //Probably a virtual folder

                            final String path1 = folder.getUri();

                            PutRequest newFolder = new PutRequest(app.getApiPath(), app.getUsername(), path1) {

                                @Override

                                public void onSuccess(@SuppressWarnings("unused") Resource result) {

                                        updateMetadata(path, newPermissions);

                                }

                                @Override

                                public void onError(Throwable t) {

                                    GWT.log("", t);

                                    if(t instanceof RestException){

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

                                    }

                                    else

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

                                }

                            };

                            newFolder.setHeader("X-Auth-Token", app.getToken());

                            newFolder.setHeader("Content-Type", "application/folder");

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

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

                            Scheduler.get().scheduleDeferred(newFolder);

                            }

                    }

                    else

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

                }

            };

            updateFolder.setHeader("X-Auth-Token", app.getToken());

            String readPermHeader = "read=";

            String writePermHeader = "write=";

            for (String u : newPermissions.keySet()) {

                Boolean[] p = newPermissions.get(u);

                if (p[0] != null && p[0])

                    readPermHeader += u + ",";

                if (p[1] != null && p[1])

                    writePermHeader += u + ",";

            }

            if (readPermHeader.endsWith("="))

                readPermHeader = "";

            else if (readPermHeader.endsWith(","))

                readPermHeader = readPermHeader.substring(0, readPermHeader.length() - 1);

            if (writePermHeader.endsWith("="))

                writePermHeader = "";

            else if (writePermHeader.endsWith(","))

                writePermHeader = writePermHeader.substring(0, writePermHeader.length() - 1);

            String permHeader = readPermHeader +  ((readPermHeader.length()  > 0 && writePermHeader.length() > 0) ?  ";" : "") + writePermHeader;

            if (permHeader.length() == 0)

                permHeader="~";

            updateFolder.setHeader("X-Object-Sharing", permHeader);

            Scheduler.get().scheduleDeferred(updateFolder);

        }

        else

            app.updateFolder(folder.getParent(), false, null);

    }

        public void selectTab(int _tab) {

                inner.selectTab(_tab);

        }

}