Synnefo » Pithos Web Client

/*

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

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

 * without modification, are permitted provided that the following

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 *   1. Redistributions of source code must retain the above

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 *

 *   2. Redistributions in binary form must reproduce the above

 *      copyright notice, this list of conditions and the following

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 *      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,

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

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

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 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 */

package gr.grnet.pithos.web.client;

import gr.grnet.pithos.web.client.FilePermissionsDialog.Images;

import java.util.HashMap;

import java.util.Map;

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

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

import com.google.gwt.event.logical.shared.ValueChangeEvent;

import com.google.gwt.event.logical.shared.ValueChangeHandler;

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

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

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

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

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

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

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

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

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

public class PermissionsList extends Composite {

        Map<String, Boolean[]> permissions = null;

        final Images images;

        final VerticalPanel permPanel = new VerticalPanel();

        final FlexTable permTable = new FlexTable();

        final String owner;

        protected boolean hasChanges = false;

    private boolean readonly = false;

    Command changePermissionsCallback;

        public PermissionsList(final Images theImages, Map<String, Boolean[]> thePermissions, String theOwner, boolean inheritsPermissions, Command _changePermissionsCallback){

                changePermissionsCallback = _changePermissionsCallback;

                images = theImages;

                owner = theOwner;

                permissions =  new HashMap<String, Boolean[]>(thePermissions);

                permTable.setText(0, 0, "Users/Groups");

                permTable.setText(0, 1, "Read Only");

                permTable.setText(0, 2, "Read/Write");

                permTable.setText(0, 3, "");

                permTable.getFlexCellFormatter().setStyleName(0, 0, "props-toplabels");

                permTable.getFlexCellFormatter().setStyleName(0, 1, "props-toplabels");

                permTable.getFlexCellFormatter().setStyleName(0, 2, "props-toplabels");

                permTable.getFlexCellFormatter().setStyleName(0, 3, "props-toplabels");

                permPanel.add(permTable);

                permPanel.addStyleName("pithos-TabPanelBottom");

                initWidget(permPanel);

                updatePermissionTable();

        }

        public boolean hasChanges(){

                return hasChanges;

        }

        /**

         * Retrieve the permissions.

         *

         * @return the permissions

         */

        public Map<String, Boolean[]> getPermissions() {

                return permissions;

        }

        public void addPermission(String user, boolean read, boolean write){

                permissions.put(user, new Boolean[] {Boolean.valueOf(read), Boolean.valueOf(write)});

                hasChanges = true;

        updatePermissionTable();

        if (changePermissionsCallback != null)

                changePermissionsCallback.execute();

        }

        /**

         * Shows the permission table 

         * 

         */

        void updatePermissionTable(){

                int i = 1;

        for (int j=1; j<permTable.getRowCount(); j++)

            permTable.removeRow(j);

                for(final String user : permissions.keySet()) {

            if (!user.contains(":")) //not a group

                permTable.setHTML(i, 0, "<span>" + AbstractImagePrototype.create(images.permUser()).getHTML() + "&nbsp;" + user + "</span>");

            else

                permTable.setHTML(i, 0, "<span>" + AbstractImagePrototype.create(images.permGroup()).getHTML() + "&nbsp;" + user.split(":")[1].trim() + "</span>");

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

            Boolean[] userPerms = permissions.get(user);

            Boolean readP = userPerms[0];

            Boolean writeP = userPerms[1];

                        RadioButton read = new RadioButton("permissions" + i);

                        read.setValue(readP != null ? readP : false);

            permTable.setWidget(i, 1, read);

            permTable.getFlexCellFormatter().setHorizontalAlignment(i, 1, HasHorizontalAlignment.ALIGN_CENTER);

            RadioButton write = new RadioButton("permissions" + i);

            write.setValue(writeP != null ? writeP : false);

            permTable.setWidget(i, 2, write);

            permTable.getFlexCellFormatter().setHorizontalAlignment(i, 2, HasHorizontalAlignment.ALIGN_CENTER);

            if (!readonly) {

                read.addValueChangeHandler(new ValueChangeHandler<Boolean>() {

                    @Override

                    public void onValueChange(ValueChangeEvent<Boolean> booleanValueChangeEvent) {

                        Boolean[] ps = permissions.get(user);

                        ps[0] = booleanValueChangeEvent.getValue();

                        ps[1] = !booleanValueChangeEvent.getValue();

                        hasChanges = true;

                        if (changePermissionsCallback != null)

                                changePermissionsCallback.execute();

                    }

                });

                write.addValueChangeHandler(new ValueChangeHandler<Boolean>() {

                    @Override

                    public void onValueChange(ValueChangeEvent<Boolean> booleanValueChangeEvent) {

                        Boolean[] ps = permissions.get(user);

                        ps[0] = !booleanValueChangeEvent.getValue();

                        ps[1] = booleanValueChangeEvent.getValue();

                        hasChanges = true;

                        if (changePermissionsCallback != null)

                                changePermissionsCallback.execute();

                    }

                });

                PushButton removeButton = new PushButton(AbstractImagePrototype.create(images.delete()).createImage(), new ClickHandler() {

                    @Override

                    public void onClick(ClickEvent event) {

                        permissions.remove(user);

                        updatePermissionTable();

                        hasChanges = true;

                        if (changePermissionsCallback != null)

                                changePermissionsCallback.execute();

                    }

                });

                permTable.setWidget(i, 3, removeButton);

                permTable.getFlexCellFormatter().setHorizontalAlignment(i, 3, HasHorizontalAlignment.ALIGN_CENTER);

            }

            else {

                read.setEnabled(false);

                write.setEnabled(false);

            }

                        i++;

                }

        }

}