Synnefo

/*

 * Copyright 2008, 2009 Electronic Business Systems Ltd.

 *

 * This file is part of GSS.

 *

 * GSS is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * GSS is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GSS.  If not, see <http://www.gnu.org/licenses/>.

 */

package gr.ebs.gss.client;

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

import gr.ebs.gss.client.rest.PostCommand;

import gr.ebs.gss.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.user.client.DeferredCommand;

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

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

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

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

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

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

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

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

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

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

/**

 * A dialog box that displays the user credentials for use in other client

 * applications, such as WebDAV clients.

 *

 * @author kman

 */

public class CredentialsDialog extends DialogBox {

        private final String WIDTH_FIELD = "35em";

        private final String WIDTH_TEXT = "42em";

        private TextBox passwordBox;

        /**

         * The 'confirm reset password' dialog box.

         */

        private class ConfirmResetPasswordDialog extends DialogBox {

                /**

                 * The widget's constructor.

                 *

                 * @param images the supplied images

                 */

                private ConfirmResetPasswordDialog(MessagePanel.Images images) {

                        // Set the dialog's caption.

                        setText("Confirmation");

                        setAnimationEnabled(true);

                        // Create a VerticalPanel to contain the label and the buttons.

                        VerticalPanel outer = new VerticalPanel();

                        HorizontalPanel buttons = new HorizontalPanel();

                        HTML text;

                        text = new HTML("<table><tr><td>" +

                                        AbstractImagePrototype.create(images.warn()).getHTML() +

                                        "</td><td>" + "Are you sure you want to create a new " +

                                        "WebDAV password?</td></tr></table>");

                        text.setStyleName("gss-warnMessage");

                        outer.add(text);

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

                        // dialog when the button is clicked and resets the password.

                        Button ok = new Button("Yes", new ClickHandler() {

                                @Override

                                public void onClick(ClickEvent event) {

                                        resetPassword(GSS.get().getCurrentUserResource().getUri());

                                        hide();

                                }

                        });

                        buttons.add(ok);

                        buttons.setCellHorizontalAlignment(ok, HasHorizontalAlignment.ALIGN_CENTER);

                        // Create the 'No' button, along with a listener that hides the

                        // dialog when the button is clicked.

                        Button cancel = new Button("No", new ClickHandler() {

                                @Override

                                public void onClick(ClickEvent event) {

                                        hide();

                                }

                        });

                        buttons.add(cancel);

                        buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);

                        buttons.setSpacing(8);

                        buttons.setStyleName("gss-warnMessage");

                        outer.setStyleName("gss-warnMessage");

                        outer.add(buttons);

                        outer.setCellHorizontalAlignment(text, HasHorizontalAlignment.ALIGN_CENTER);

                        outer.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);

                        setWidget(outer);

                }

                @Override

                protected void onPreviewNativeEvent(NativePreviewEvent preview) {

                        super.onPreviewNativeEvent(preview);

                        NativeEvent evt = preview.getNativeEvent();

                        if (evt.getType().equals("keydown"))

                                // 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:

                                        case KeyCodes.KEY_ESCAPE:

                                                hide();

                                                break;

                                }

                }

        }

        private class ReauthenticateDialog extends DialogBox {

                /**

                 * The widget constructor.

                 */

                public ReauthenticateDialog() {

                        // Set the dialog's caption.

                        setText("New Password Created");

                        setAnimationEnabled(true);

                        VerticalPanel outer = new VerticalPanel();

                        // Create the text and set a style name so we can style it with CSS.

                        HTML text = new HTML("<p>A new WebDAV password has been created." +

                                        "</p><p>You will now be redirected to the initial screen" +

                                        " for the changes to take effect. Choose \"Show " +

                                        "Credentials\" again afterwards to see the new password.</p>");

                        text.setStyleName("gss-AboutText");

                        outer.add(text);

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

                        // dialog when the button is clicked.

                        Button confirm = new Button("Proceed", new ClickHandler() {

                                @Override

                                public void onClick(ClickEvent event) {

                                        GSS.get().authenticateUser();

                                        hide();

                                }

                        });

                        outer.add(confirm);

                        outer.setCellHorizontalAlignment(confirm, HasHorizontalAlignment.ALIGN_CENTER);

                        outer.setSpacing(8);

                        setWidget(outer);

                }

                @Override

                protected void onPreviewNativeEvent(NativePreviewEvent preview) {

                        super.onPreviewNativeEvent(preview);

                        NativeEvent evt = preview.getNativeEvent();

                        if (evt.getType().equals("keydown"))

                                // 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:

                                                GSS.get().authenticateUser();

                                                hide();

                                                break;

                                        case KeyCodes.KEY_ESCAPE:

                                                hide();

                                                break;

                                }

                }

        }

        /**

         * The widget constructor.

         */

        public CredentialsDialog(final MessagePanel.Images images) {

                // Set the dialog's caption.

                setText("User Credentials");

                setAnimationEnabled(true);

                // A VerticalPanel that contains the 'about' label and the 'OK' button.

                VerticalPanel outer = new VerticalPanel();

                Configuration conf = (Configuration) GWT.create(Configuration.class);

                String service = conf.serviceName();

        String path = Window.Location.getPath();

        String baseUrl = GWT.getModuleBaseURL();

        String homeUrl = baseUrl.substring(0, baseUrl.indexOf(path));

                String webdavUrl = homeUrl + conf.webdavUrl();

                String tokenNote = conf.tokenTTLNote();

                // Create the text and set a style name so we can style it with CSS.

                HTML text = new HTML("<p>These are the user credentials that are " +

                                "required for interacting with " + service + ". You can copy" +

                                " and paste the username and password in the WebDAV client " +

                                "in order to use " + service + " through the WebDAV " +

                                "interface, at:<br/> " + webdavUrl + "<br/>" + tokenNote +

                                "</p>");

                text.setStyleName("gss-AboutText");

                text.setWidth(WIDTH_TEXT);

                outer.add(text);

                FlexTable table = new FlexTable();

                table.setText(0, 0, "Username");

                table.setText(1, 0, "Password");

                table.setText(2, 0, "Token");

                TextBox username = new TextBox();

                final GSS app = GSS.get();

                username.setText(app.getCurrentUserResource().getUsername());

                username.setReadOnly(true);

                username.setWidth(WIDTH_FIELD);

                username.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                GSS.enableIESelection();

                                ((TextBox) event.getSource()).selectAll();

                                GSS.preventIESelection();

                        }

                });

                table.setWidget(0, 1, username);

                passwordBox = new TextBox();

                passwordBox.setText(app.getWebDAVPassword());

                passwordBox.setReadOnly(true);

                passwordBox.setWidth(WIDTH_FIELD);

                passwordBox.addClickHandler(new  ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                GSS.enableIESelection();

                                ((TextBox) event.getSource()).selectAll();

                                GSS.preventIESelection();

                        }

                });

                table.setWidget(1, 1, passwordBox);

                TextBox tokenBox = new TextBox();

                tokenBox.setText(app.getToken());

                tokenBox.setReadOnly(true);

                tokenBox.setWidth(WIDTH_FIELD);

                tokenBox.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                GSS.enableIESelection();

                                ((TextBox) event.getSource()).selectAll();

                                GSS.preventIESelection();

                        }

                });

                table.setWidget(2, 1, tokenBox);

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

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

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

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

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

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

                outer.add(table);

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

                // when the button is clicked.

                Button confirm = new Button("Close", new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                hide();

                        }

                });

                outer.add(confirm);

                outer.setCellHorizontalAlignment(confirm, HasHorizontalAlignment.ALIGN_CENTER);

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

                // the dialog when the button is clicked.

                Button resetPassword = new Button("Reset Password", new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                ConfirmResetPasswordDialog dlg = new ConfirmResetPasswordDialog(images);

                                dlg.center();

                        }

                });

                outer.add(resetPassword);

                outer.setCellHorizontalAlignment(resetPassword, HasHorizontalAlignment.ALIGN_CENTER);

                outer.setSpacing(8);

                setWidget(outer);

        }

        @Override

        protected void onPreviewNativeEvent(NativePreviewEvent preview) {

                super.onPreviewNativeEvent(preview);

                NativeEvent evt = preview.getNativeEvent();

                if (evt.getType().equals("keydown"))

                        // 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:

                                case KeyCodes.KEY_ESCAPE:

                                        hide();

                                        break;

                        }

        }

        /**

         * Generate an RPC request to reset WebDAV password.

         *

         * @param userId the Uri of the user whose password will be reset

         */

        private void resetPassword(String userUri) {

                if (userUri == null || userUri.length() == 0) {

                        GSS.get().displayError("Empty user Uri!");

                        return;

                }

                GWT.log("resetPassword(" + userUri + ")", null);

                PostCommand cg = new PostCommand(userUri + "?resetWebDAV", "", 200) {

                        @Override

                        public void onComplete() {

                                ReauthenticateDialog dlg = new ReauthenticateDialog();

                                dlg.center();

                        }

                        @Override

                        public void onError(Throwable t) {

                                GWT.log("", t);

                                if(t instanceof RestException){

                                        int statusCode = ((RestException)t).getHttpStatusCode();

                                        if(statusCode == 405)

                                                GSS.get().displayError("You don't have the necessary" +

                                                                " permissions");

                                        else if(statusCode == 404)

                                                GSS.get().displayError("Resource does not exist");

                                        else

                                                GSS.get().displayError("Unable to reset password:" +

                                                                        ((RestException)t).getHttpStatusText());

                                }

                                else

                                        GSS.get().displayError("System error resetting password:" +

                                                                t.getMessage());

                        }

                };

                DeferredCommand.addCommand(cg);

        }

}