org.syncany.operations.restore.RestoreFileSystemAction.java Source code

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Here is the source code for org.syncany.operations.restore.RestoreFileSystemAction.java

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/*
 * Syncany, www.syncany.org
 * Copyright (C) 2011-2015 Philipp C. Heckel <philipp.heckel@gmail.com> 
 *
 * 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.syncany.operations.restore;

import java.io.File;

import org.apache.commons.io.FileUtils;
import org.syncany.config.Config;
import org.syncany.database.FileVersion;
import org.syncany.database.FileVersion.FileStatus;
import org.syncany.database.FileVersion.FileType;
import org.syncany.database.MemoryDatabase;
import org.syncany.operations.Assembler;
import org.syncany.operations.down.actions.FileCreatingFileSystemAction;
import org.syncany.util.NormalizedPath;

public class RestoreFileSystemAction extends FileCreatingFileSystemAction {
    private String relativeTargetPath;

    public RestoreFileSystemAction(Config config, Assembler assembler, FileVersion fileVersion,
            String relativeTargetPath) {
        super(config, new MemoryDatabase(), assembler, null, fileVersion);
        this.relativeTargetPath = relativeTargetPath;
    }

    @Override
    public RestoreFileSystemActionResult execute() throws Exception {
        if (fileVersion2.getType() == FileType.FOLDER) {
            throw new Exception("Cannot restore folders.");
        } else if (fileVersion2.getType() == FileType.SYMLINK) {
            throw new Exception("Not yet implemented.");
        } else {
            if (fileVersion2.getStatus() == FileStatus.DELETED) {
                throw new Exception("Cannot restore version marked DELETED. Try previous version.");
            }

            // Assemble file to cache
            File cacheFile = assembleFileToCache(fileVersion2);

            // Find target path & folder
            NormalizedPath targetPath = findTargetPath();
            NormalizedPath targetFolder = targetPath.getParent();

            // Create folder (if necessary) and move file
            if (!targetFolder.toFile().isDirectory()) {
                targetFolder.toFile().mkdirs();
            }

            FileUtils.moveFile(cacheFile, targetPath.toFile());

            return new RestoreFileSystemActionResult(targetPath.toFile());
        }
    }

    private NormalizedPath findTargetPath() throws Exception {
        NormalizedPath targetPath = null;

        if (relativeTargetPath == null) {
            String restoredSuffix = "restored version " + fileVersion2.getVersion();
            targetPath = new NormalizedPath(config.getLocalDir(), fileVersion2.getPath()).withSuffix(restoredSuffix,
                    false);
        } else {
            targetPath = new NormalizedPath(config.getLocalDir(), relativeTargetPath);
        }

        return targetPath;
    }
}