001    /**
002     * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.documentlibrary.util;
016    
017    import com.liferay.portal.kernel.exception.PortalException;
018    import com.liferay.portal.kernel.exception.SystemException;
019    import com.liferay.portal.kernel.repository.model.FileVersion;
020    import com.liferay.portal.kernel.util.ArrayUtil;
021    import com.liferay.portal.kernel.util.ContentTypes;
022    import com.liferay.portal.kernel.util.FileUtil;
023    import com.liferay.portal.kernel.util.GetterUtil;
024    import com.liferay.portal.kernel.util.MimeTypesUtil;
025    import com.liferay.portal.kernel.util.Validator;
026    import com.liferay.portal.security.permission.ActionKeys;
027    import com.liferay.portal.security.permission.PermissionChecker;
028    import com.liferay.portlet.documentlibrary.service.permission.DLFolderPermission;
029    
030    import java.io.File;
031    
032    import java.util.ArrayList;
033    import java.util.List;
034    
035    /**
036     * @author Alexander Chow
037     */
038    public class DLAppUtil {
039    
040            public static long[] filterFolderIds(
041                            PermissionChecker permissionChecker, long groupId, long[] folderIds)
042                    throws PortalException, SystemException {
043    
044                    List<Long> viewableFolderIds = new ArrayList<Long>(folderIds.length);
045    
046                    for (long folderId : folderIds) {
047                            if (DLFolderPermission.contains(
048                                            permissionChecker, groupId, folderId, ActionKeys.VIEW)) {
049    
050                                    viewableFolderIds.add(folderId);
051                            }
052                    }
053    
054                    return ArrayUtil.toArray(
055                            viewableFolderIds.toArray(new Long[viewableFolderIds.size()]));
056            }
057    
058            public static String getExtension(String title, String sourceFileName) {
059                    String extension = FileUtil.getExtension(sourceFileName);
060    
061                    if (Validator.isNull(extension)) {
062                            extension = FileUtil.getExtension(title);
063                    }
064    
065                    return extension;
066            }
067    
068            public static String getMimeType(
069                    String sourceFileName, String mimeType, String title, File file) {
070    
071                    if (Validator.isNull(mimeType) ||
072                            mimeType.equals(ContentTypes.APPLICATION_OCTET_STREAM)) {
073    
074                            String extension = getExtension(title, sourceFileName);
075    
076                            mimeType = MimeTypesUtil.getContentType(file, "A." + extension);
077                    }
078    
079                    return mimeType;
080            }
081    
082            public static boolean isMajorVersion(
083                    FileVersion previousFileVersion, FileVersion currentFileVersion) {
084    
085                    long currentVersion = GetterUtil.getLong(
086                            currentFileVersion.getVersion());
087                    long previousVersion = GetterUtil.getLong(
088                            previousFileVersion.getVersion());
089    
090                    return (currentVersion - previousVersion) >= 1;
091            }
092    
093    }