Synnefo » Pithos Web Client

/*

 * Copyright 2011-2013 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.ClickEvent;

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

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

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

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

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

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.PostRequest;

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

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

import java.util.Map;

/**

 * The 'Folder properties' dialog box implementation.

 */

public class FolderPermissionsDialog extends DialogBox {

    protected Pithos app;

    /**

     * The widget that holds the folderName of the folder.

     */

    Label folderName = new Label();

    protected PermissionsList permList;

    final Folder folder;

    final VerticalPanel inner;

    final Button updateButton;

    private boolean _initialPermissionCheck = true;

    /**

     * The widget's constructor.

     */

    public FolderPermissionsDialog(final Pithos app, 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();

        folder = selected;

        setText("Folder permissions");

        // Outer contains inner and buttons

        VerticalPanel outer = new VerticalPanel();

        outer.add(close);

        // Inner contains generalPanel and permPanel

        inner = new VerticalPanel();

        inner.addStyleName("inner");

        folderName.setText(folder.getName());

        VerticalPanel permPanel = new VerticalPanel();

        FileShareDialog.PrivateSharingImages images = GWT.create(FileShareDialog.PrivateSharingImages.class);

        permList = new PermissionsList(app, images, folder.getPermissions(), folder.getOwnerID(), false, null);

        permPanel.add(permList);

        HorizontalPanel permButtons = new HorizontalPanel();

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

            @Override

            public void onClick(ClickEvent event) {

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

                dlg.center();

                checkUpdateButtonVisibility();

            }

        });

        addUser.addStyleName("button");

        permButtons.add(addUser);

        permButtons.setCellHorizontalAlignment(addUser, HasHorizontalAlignment.ALIGN_CENTER);

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

            @Override

            public void onClick(ClickEvent event) {

                if(app.getAccount().getGroups().isEmpty()) {

                    new GroupCreateDialog(app, new Command() {

                        @Override

                        public void execute() {

                            if(app.getAccount().getGroups().isEmpty()) {

                                return;

                            }

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

                            dlg.center();

                            checkUpdateButtonVisibility();

                        }

                    }).center();

                }

                else {

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

                    dlg.center();

                    checkUpdateButtonVisibility();

                }

            }

        });

        add.addStyleName("button");

        permButtons.add(add);

        permButtons.setCellHorizontalAlignment(add, HasHorizontalAlignment.ALIGN_CENTER);

        permButtons.setSpacing(8);

        permPanel.add(permButtons);

        inner.add(permPanel);

        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.

        final String okLabel = "Update";

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

            @Override

            public void onClick(ClickEvent event) {

                updateFolder();

                closeDialog();

            }

        });

        updateButton.addStyleName("button");

        checkUpdateButtonVisibility();

        outer.add(updateButton);

        outer.setCellHorizontalAlignment(inner, HasHorizontalAlignment.ALIGN_CENTER);

        setWidget(outer);

    }

    private void checkUpdateButtonVisibility() {

        if(!this._initialPermissionCheck) {

            updateButton.setVisible(true);

            return;

        }

        updateButton.setVisible(permList.hasPermissions());

        this._initialPermissionCheck = false;

    }

    @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:

                    updateFolder();

                    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();

    }

    void updateFolder() {

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

        updateMetadata(

            folder.getUri() + Const.QUESTION_MARK_UPDATE_EQ,

            perms

        );

    }

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

        if(newPermissions != null) {

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

                @Override

                public void onSuccess(Resource result) {

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

                        @Override

                        public void execute() {

                            app.updateMySharedRoot();

                        }

                    }, true);

                }

                @Override

                public void onError(Throwable t) {

                    app.setError(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(), folder.getOwnerID(), path1) {

                                @Override

                                public void onSuccess(Resource result) {

                                    updateMetadata(path, newPermissions);

                                }

                                @Override

                                public void onError(Throwable _t) {

                                    app.setError(_t);

                                    if(_t instanceof RestException) {

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

                                    }

                                    else {

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

                                    }

                                }

                                @Override

                                protected void onUnauthorized(Response response) {

                                    app.sessionExpired();

                                }

                            };

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

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

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

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

                            Scheduler.get().scheduleDeferred(newFolder);

                        }

                        else if(((RestException) t).getHttpStatusCode() == Response.SC_CONFLICT) {

                            app.displayError("Cannot set permissions. Probably subfolders or files already have permissions set");

                        }

                        else {

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

                        }

                    }

                    else {

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

                    }

                }

                @Override

                protected void onUnauthorized(Response response) {

                    app.sessionExpired();

                }

            };

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

            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 = "~";

            }

            else {

                permHeader = URL.encodePathSegment(permHeader);

            }

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

            Scheduler.get().scheduleDeferred(updateFolder);

        }

        else {

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

                @Override

                public void execute() {

                    app.updateMySharedRoot();

                }

            }, true);

        }

    }

}