001/*
002 * Syncany, www.syncany.org
003 * Copyright (C) 2011-2016 Philipp C. Heckel <philipp.heckel@gmail.com> 
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU General Public License as published by
007 * the Free Software Foundation, either version 3 of the License, or
008 * (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU General Public License for more details.
014 *
015 * You should have received a copy of the GNU General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018package org.syncany.operations.down.actions;
019
020import org.syncany.config.Config;
021import org.syncany.database.FileVersion;
022import org.syncany.database.FileVersionComparator.FileChange;
023import org.syncany.database.FileVersionComparator.FileVersionComparison;
024import org.syncany.database.MemoryDatabase;
025import org.syncany.util.CollectionUtil;
026
027public class NewSymlinkFileSystemAction extends FileSystemAction {
028        public NewSymlinkFileSystemAction(Config config, FileVersion newFileVersion, MemoryDatabase winningDatabase) {
029                super(config, winningDatabase, null, newFileVersion);
030        }
031        
032        @Override
033        public FileSystemActionResult execute() throws Exception {
034                if (fileExists(fileVersion2)) {
035                        FileVersionComparison fileComparison = fileChanges(fileVersion2);
036                        
037                        if (fileComparison.areEqual()) {
038                                // Nothing to do.
039                        }
040                        else if (CollectionUtil.containsOnly(fileComparison.getFileChanges(), FileChange.CHANGED_LINK_TARGET)) {
041                                deleteFile(fileVersion2);
042                                createSymlink(fileVersion2);
043                        }
044                        else {
045                                moveToConflictFile(fileVersion2);
046                                createSymlink(fileVersion2);
047                        }
048                }
049                else {
050                        createSymlink(fileVersion2);
051                }                       
052                
053                return new FileSystemActionResult();
054        }
055
056        @Override
057        public String toString() {
058                return "NewSymlinkFileSystemAction [file1=" + fileVersion1 + ", file2=" + fileVersion2 + "]";
059        }                               
060}