source: trunk/src/org/expeditee/items/PermissionPair.java@ 1200

/**
 *    PermissionPair.java
 *    Copyright (C) 2010 New Zealand Digital Library, http://expeditee.org
 *
 *    This program 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.
 *
 *    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.expeditee.items;

import org.expeditee.settings.UserSettings;

public class PermissionPair {

        private UserAppliedPermission ownerPermission;
        private UserAppliedPermission notOwnerPermission;

        public PermissionPair(String permissionCode, UserAppliedPermission defaultPermission) {
                ownerPermission = defaultPermission;
                notOwnerPermission = defaultPermission;

                if (permissionCode != null) {

                        permissionCode = permissionCode.trim().toLowerCase();
                        if (permissionCode.length() != 0) {

                                if (permissionCode.length() == 1 || (permissionCode.length() == 2 && permissionCode.startsWith("-"))) {
                                        // replicate it to cover ifOwner/ifNotOwner
                                        permissionCode += permissionCode;
                                }
                                
                                final int ownerPermissionIndexStart = 0;
                                final int ownerPermissionIndexEnd = permissionCode.charAt(ownerPermissionIndexStart) == '-' ? 
                                                                ownerPermissionIndexStart + 2 : ownerPermissionIndexStart + 1;
                                final int notOwnerPermissionIndexStart = ownerPermissionIndexEnd;
                                final int notOwnerPermissionIndexEnd = permissionCode.charAt(notOwnerPermissionIndexStart) == '-' ? 
                                                notOwnerPermissionIndexStart + 2 : notOwnerPermissionIndexStart + 1;
                                final String ownerPermissionCode = permissionCode.substring(ownerPermissionIndexStart, ownerPermissionIndexEnd);
                                final String notOwnerPermissionCode = permissionCode.substring(notOwnerPermissionIndexStart, notOwnerPermissionIndexEnd);
                                ownerPermission = UserAppliedPermission.getPermission(ownerPermissionCode, defaultPermission);
                                notOwnerPermission = UserAppliedPermission.getPermission(notOwnerPermissionCode, defaultPermission);
                        }
                }
        }

        public PermissionPair(UserAppliedPermission ownerPermission, UserAppliedPermission notOwnerPermission) {
                this.ownerPermission = ownerPermission;
                this.notOwnerPermission = notOwnerPermission;
        }

        public PermissionPair(UserAppliedPermission ownerPermissionForBoth) {
                this(ownerPermissionForBoth, ownerPermissionForBoth);
        }

        public PermissionPair(PermissionPair pp) {
                ownerPermission = pp.ownerPermission;
                notOwnerPermission = pp.notOwnerPermission;
        }

        public UserAppliedPermission getPermission(String ownerOfItem) {

                if (UserSettings.UserName.get().equals(ownerOfItem)) {
                        return ownerPermission;
                } else {
                        return notOwnerPermission;
                }
        }

        /**
         * Converts the given Expeditee permission code into a PermissionPair
         * corresponding to the constants defined in Item.
         * 
         * @param permissionCode
         *            The Expeditee permission code to convert
         * @return The resulting PermissionPair corresponding to a pair of constants as
         *         defined in Item
         */
        public static PermissionPair convertString(String permissionCode) {
                PermissionPair pp = new PermissionPair(permissionCode, UserAppliedPermission.full);

                return pp;
        }

        public String getCode() {
                return Integer.toString(ownerPermission.getCode()) + Integer.toString(notOwnerPermission.getCode());
        }

        @Override
        public String toString() {
                return ownerPermission.toString() + ":" + notOwnerPermission.toString();
        }
}