Synnefo » Pithos

/*

 * Copyright 2007, 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 gr.ebs.gss.client.rest.GetCommand;

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

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

import gr.ebs.gss.client.rest.resource.FileResource;

import gr.ebs.gss.client.rest.resource.GroupResource;

import gr.ebs.gss.client.rest.resource.PermissionHolder;

import gr.ebs.gss.client.rest.resource.TagsResource;

import java.util.Iterator;

import java.util.List;

import java.util.Set;

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

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

import com.google.gwt.json.client.JSONArray;

import com.google.gwt.json.client.JSONBoolean;

import com.google.gwt.json.client.JSONObject;

import com.google.gwt.json.client.JSONString;

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

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

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

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

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

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

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

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

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

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

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

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.KeyboardListener;

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

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 com.google.gwt.user.client.ui.Widget;

/**

 * The 'File properties' dialog box implementation.

 *

 * @author past

 */

public class FilePropertiesDialog extends DialogBox {

        final PermissionsList permList;

        private CheckBox readForAll;

        /**

         * An image bundle for this widgets images.

         */

        public interface Images extends MessagePanel.Images {

                @Resource("gr/ebs/gss/resources/edit_user.png")

                AbstractImagePrototype permUser();

                @Resource("gr/ebs/gss/resources/groupevent.png")

                AbstractImagePrototype permGroup();

                @Resource("gr/ebs/gss/resources/editdelete.png")

                AbstractImagePrototype delete();

                @Resource("gr/ebs/gss/resources/db_update.png")

                AbstractImagePrototype restore();

                @Resource("gr/ebs/gss/resources/folder_inbox.png")

                AbstractImagePrototype download();

        }

        /**

         * The widget that holds the name of the file.

         */

        private TextBox name = new TextBox();

        /**

         * Text box with the tags associated with the file

         */

        private TextBox tags = new TextBox();

        /**

         * A FlowPanel with all user tags

         */

        private FlowPanel allTagsContent;

        private final CheckBox versioned = new CheckBox();

        final FileResource file;

        String initialTagText;

        final TabPanel inner;

        /**

         * The widget's constructor.

         *

         * @param images the dialog's ImageBundle

         * @param groups

         * @param bodies

         */

        public FilePropertiesDialog(final Images images, final List<GroupResource> groups, List<FileResource> bodies) {

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

                GSS.enableIESelection();

                // Set the dialog's caption.

                setText("File properties");

                setAnimationEnabled(true);

                file = (FileResource) GSS.get().getCurrentSelection();

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

                // Outer contains inner and buttons.

                final VerticalPanel outer = new VerticalPanel();

                final FocusPanel focusPanel = new FocusPanel(outer);

                // Inner contains generalPanel and permPanel.

                inner = new TabPanel();

                final VerticalPanel generalPanel = new VerticalPanel();

                final VerticalPanel permPanel = new VerticalPanel();

                final HorizontalPanel buttons = new HorizontalPanel();

                final HorizontalPanel permButtons = new HorizontalPanel();

                final HorizontalPanel permForAll = new HorizontalPanel();

                final HorizontalPanel pathPanel = new HorizontalPanel();

                final VerticalPanel verPanel = new VerticalPanel();

                final HorizontalPanel vPanel = new HorizontalPanel();

                final HorizontalPanel vPanel2 = new HorizontalPanel();

                versioned.setChecked(file.isVersioned());

                inner.add(generalPanel, "General");

                inner.add(permPanel, "Sharing");

                inner.add(verPanel, "Versions");

                inner.selectTab(0);

                final FlexTable generalTable = new FlexTable();

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

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

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

                generalTable.setText(3, 0, "Date");

                generalTable.setText(4, 0, "Tags");

                name.setText(file.getName());

                generalTable.setWidget(0, 1, name);

                if(file.getFolderName() != null)

                        generalTable.setText(1, 1, file.getFolderName());

                else

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

                generalTable.setText(2, 1, file.getOwner());

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

                generalTable.setText(3, 1, formatter.format(file.getCreationDate()));

                // Get the tags.

                StringBuffer tagsBuffer = new StringBuffer();

                Iterator i = file.getTags().iterator();

                while (i.hasNext()) {

                        String tag = (String) i.next();

                        tagsBuffer.append(tag).append(", ");

                }

                if (tagsBuffer.length() > 1)

                        tagsBuffer.delete(tagsBuffer.length() - 2, tagsBuffer.length() - 1);

                initialTagText = tagsBuffer.toString();

                tags.setText(initialTagText);

                generalTable.setWidget(4, 1, tags);

                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(4, 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.getFlexCellFormatter().setStyleName(4, 1, "props-values");

                generalTable.setCellSpacing(4);

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

                // when the button is clicked.

                final Button ok = new Button("OK", new ClickListener() {

                        public void onClick(Widget sender) {

                                accept();

                                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.

                final Button cancel = new Button("Cancel", new ClickListener() {

                        public void onClick(Widget sender) {

                                closeDialog();

                        }

                });

                buttons.add(cancel);

                buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);

                buttons.setSpacing(8);

                buttons.addStyleName("gwt-TabPanelBottom");

                generalPanel.add(generalTable);

                // Asynchronously retrieve the tags defined by this user.

                DeferredCommand.addCommand(new Command() {

                        public void execute() {

                                updateTags();

                        }

                });

                DisclosurePanel allTags = new DisclosurePanel("All tags");

                allTagsContent = new FlowPanel();

                allTags.setContent(allTagsContent);

                generalPanel.add(allTags);

                generalPanel.setSpacing(4);

                final Button add = new Button("Add Group", new ClickListener() {

                        public void onClick(Widget sender) {

                                PermissionsAddDialog dlg = new PermissionsAddDialog(groups, permList, false);

                                dlg.center();

                        }

                });

                permButtons.add(add);

                permButtons.setCellHorizontalAlignment(add, HasHorizontalAlignment.ALIGN_CENTER);

                final Button addUser = new Button("Add User", new ClickListener() {

                        public void onClick(Widget sender) {

                                PermissionsAddDialog dlg = new PermissionsAddDialog(groups, permList, true);

                                dlg.center();

                        }

                });

                permButtons.add(addUser);

                permButtons.setCellHorizontalAlignment(addUser, HasHorizontalAlignment.ALIGN_CENTER);

                permButtons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);

                permButtons.setSpacing(8);

                permButtons.addStyleName("gwt-TabPanelBottom");

                final Label readForAllNote = new Label("When this option is enabled, the file will be readable" +

                                        " by everyone. By checking this option, you are certifying that you have the right to " +

                                        "distribute this file and that it does not violate the Terms of Use.", true);

                readForAllNote.setVisible(false);

                readForAllNote.setStylePrimaryName("gss-readForAllNote");

                readForAll = new CheckBox();

                readForAll.setChecked(file.isReadForAll());

                readForAll.addClickListener(new ClickListener() {

                        public void onClick(Widget sender) {

                                if (readForAll.isChecked()) {

                                        readForAllNote.setVisible(true);

                                        pathPanel.setVisible(true);

                                }

                                else {

                                        readForAllNote.setVisible(false);

                                        pathPanel.setVisible(false);

                                }

                        }

                });

                permPanel.add(permList);

                permPanel.add(permButtons);

                // Only show the read for all permission if the user is the owner.

                if (file.getOwner().equals(GSS.get().getCurrentUserResource().getUsername())) {

                        permForAll.add(new Label("Make Public"));

                        permForAll.add(readForAll);

                        permForAll.setSpacing(8);

                        permForAll.addStyleName("gwt-TabPanelBottom");

                        permPanel.add(permForAll);

                        permPanel.add(readForAllNote);

                }

                TextBox path = new TextBox();

                path.addClickListener(new ClickListener () {

                        public void onClick(Widget sender) {

                                GSS.enableIESelection();

                                ((TextBox) sender).selectAll();

                                GSS.preventIESelection();

                        }

                });

                path.setText(file.getUri());

                path.setTitle("Use this URI for sharing this file with the world");

                path.setReadOnly(true);

                pathPanel.add(new Label("Sharing URI"));

                pathPanel.setSpacing(8);

                pathPanel.addStyleName("gwt-TabPanelBottom");

                pathPanel.add(path);

                pathPanel.setVisible(file.isReadForAll());

                permPanel.add(pathPanel);

                VersionsList verList = new VersionsList(this, images, bodies);

                verPanel.add(verList);

                vPanel.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);

                vPanel.setSpacing(8);

                vPanel.addStyleName("gwt-TabPanelBottom");

                vPanel.add(new Label("Versioned"));

                vPanel.add(versioned);

                verPanel.add(vPanel);

                vPanel2.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);

                vPanel2.setSpacing(8);

                vPanel2.addStyleName("gwt-TabPanelBottom");

                Button removeVersionsButton = new Button(images.delete().getHTML(), new ClickListener() {

                        public void onClick(Widget sender) {

                                ConfirmationDialog confirm = new ConfirmationDialog(images,"Really remove all previous versions?","Remove"){

                                        public void cancel() {

                                        }

                                        public void confirm() {

                                                FilePropertiesDialog.this.closeDialog();

                                                removeAllOldVersions();

                                        }

                                };

                                confirm.center();

                        }

                });

                HTML removeAllVersion = new HTML("<span>Remove all previous versions?</span>");

                vPanel2.add(removeAllVersion);

                vPanel2.add(removeVersionsButton);

                verPanel.add(vPanel2);

                if(!file.isVersioned())

                        vPanel2.setVisible(false);

                outer.add(inner);

                outer.add(buttons);

                outer.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);

                outer.addStyleName("gwt-TabPanelBottom");

                focusPanel.setFocus(true);

                setWidget(outer);

        }

        /**

         * Retrieves all user tags from the server and updates the FlowPanel

         *

         * @param userId

         */

        private void updateTags() {

                GetCommand<TagsResource> tc = new GetCommand<TagsResource>(TagsResource.class, GSS.get().getCurrentUserResource().getTagsPath()) {

                        public void onComplete() {

                                allTagsContent.clear();

                                TagsResource tagr = getResult();

                                List<String> userTags = tagr.getTags();

                                Iterator t = userTags.iterator();

                                while (t.hasNext()) {

                                        final Button tag = new Button((String) t.next(), new ClickListener() {

                                                public void onClick(Widget sender) {

                                                        String existing = tags.getText();

                                                        String newTag = ((Button) sender).getText().trim();

                                                        // insert the new tag only if it is not in the list

                                                        // already

                                                        if (existing.indexOf(newTag + ",") == -1 && !existing.trim().endsWith(newTag))

                                                                tags.setText(existing.trim() + (existing.length() > 0 ? ", " : "") + newTag);

                                                }

                                        });

                                        allTagsContent.add(tag);

                                }

                        }

                        @Override

                        public void onError(Throwable t) {

                                GWT.log("", t);

                                GSS.get().displayError("Unable to fetch user tags");

                        }

                };

                DeferredCommand.addCommand(tc);

        }

        @Override

        @SuppressWarnings("fallthrough")

        public boolean onKeyDownPreview(char key, int modifiers) {

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

                // enter or escape is pressed.

                switch (key) {

                        case KeyboardListener.KEY_ENTER:

                                accept();

                        case KeyboardListener.KEY_ESCAPE:

                                closeDialog();

                                break;

                }

                return true;

        }

        /**

         * Accepts any change and updates the file

         *

         * @param userId

         */

        private void accept() {

                permList.updatePermissionsAccordingToInput();

                Set<PermissionHolder> perms = permList.getPermissions();

                JSONObject json = new JSONObject();

                if (!name.getText().equals(file.getName()))

                        json.put("name", new JSONString(name.getText()));

                if (versioned.isChecked() != file.isVersioned())

                        json.put("versioned", JSONBoolean.getInstance(versioned.isChecked()));

                //only update the read for all perm if the user is the owner

                if (readForAll.isChecked() != file.isReadForAll())

                        if (file.getOwner().equals(GSS.get().getCurrentUserResource().getUsername()))

                                json.put("readForAll", JSONBoolean.getInstance(readForAll.isChecked()));

                int i = 0;

                if (permList.hasChanges()) {

                        GWT.log("Permissions change", null);

                        JSONArray perma = new JSONArray();

                        for (PermissionHolder p : perms) {

                                JSONObject po = new JSONObject();

                                if (p.getUser() != null)

                                        po.put("user", new JSONString(p.getUser()));

                                if (p.getGroup() != null)

                                        po.put("group", new JSONString(p.getGroup()));

                                po.put("read", JSONBoolean.getInstance(p.isRead()));

                                po.put("write", JSONBoolean.getInstance(p.isWrite()));

                                po.put("modifyACL", JSONBoolean.getInstance(p.isModifyACL()));

                                perma.set(i, po);

                                i++;

                        }

                        json.put("permissions", perma);

                }

                JSONArray taga = new JSONArray();

                i = 0;

                if (!tags.getText().equals(initialTagText)) {

                        String[] tagset = tags.getText().split(",");

                        for (String t : tagset) {

                                JSONString to = new JSONString(t);

                                taga.set(i, to);

                                i++;

                        }

                        json.put("tags", taga);

                }

                String jsonString = json.toString();

                if(jsonString.equals("{}")){

                        GWT.log("NO CHANGES", null);

                        return;

                }

                PostCommand cf = new PostCommand(file.getUri() + "?update=", jsonString, 200) {

                        public void onComplete() {

                                GSS.get().getFileList().updateFileCache(true, false /* do not clear selected file*/);

                        }

                        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("User in permissions does not exist");

                                        else if (statusCode == 409)

                                                GSS.get().displayError("A file with the same name already exists");

                                        else if (statusCode == 413)

                                                GSS.get().displayError("Your quota has been exceeded");

                                        else

                                                GSS.get().displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());

                                } else

                                        GSS.get().displayError("System error modifying file:" + t.getMessage());

                        }

                };

                DeferredCommand.addCommand(cf);

        }

        private void removeAllOldVersions() {

                JSONObject json = new JSONObject();

                json.put("versioned", JSONBoolean.getInstance(false));

                GWT.log(json.toString(), null);

                PostCommand cf = new PostCommand(file.getUri() + "?update=", json.toString(), 200) {

                        public void onComplete() {

                                toggleVersioned(true);

                        }

                        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("User in permissions does not exist");

                                        else if (statusCode == 409)

                                                GSS.get().displayError("A folder with the same name already exists");

                                        else if (statusCode == 413)

                                                GSS.get().displayError("Your quota has been exceeded");

                                        else

                                                GSS.get().displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());

                                } else

                                        GSS.get().displayError("System error moifying file:" + t.getMessage());

                        }

                };

                DeferredCommand.addCommand(cf);

        }

        private void toggleVersioned(boolean versionedValue) {

                JSONObject json = new JSONObject();

                json.put("versioned", JSONBoolean.getInstance(versionedValue));

                GWT.log(json.toString(), null);

                PostCommand cf = new PostCommand(file.getUri() + "?update=", json.toString(), 200) {

                        public void onComplete() {

                                GSS.get().getFileList().updateFileCache(true, false /* do not clear selected file*/);

                        }

                        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("User in permissions does not exist");

                                        else if (statusCode == 409)

                                                GSS.get().displayError("A folder with the same name already exists");

                                        else if (statusCode == 413)

                                                GSS.get().displayError("Your quota has been exceeded");

                                        else

                                                GSS.get().displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());

                                } else

                                        GSS.get().displayError("System error moifying file:" + t.getMessage());

                        }

                };

                DeferredCommand.addCommand(cf);

        }

        public void selectTab(int _tab) {

                inner.selectTab(_tab);

        }

        /**

         * Enables IE selection prevention and hides the dialog

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

         */

        public void closeDialog() {

                GSS.preventIESelection();

                hide();

        }

}