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/* ownCloud Android Library is available under MIT license
 *   Copyright (C) 2015 ownCloud Inc.
 *   
 *   Permission is hereby granted, free of charge, to any person obtaining a copy
 *   of this software and associated documentation files (the "Software"), to deal
 *   in the Software without restriction, including without limitation the rights
 *   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *   copies of the Software, and to permit persons to whom the Software is
 *   furnished to do so, subject to the following conditions:
 *   
 *   The above copyright notice and this permission notice shall be included in
 *   all copies or substantial portions of the Software.
 *   
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 
 *   BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 
 *   ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 
 *   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *   THE SOFTWARE.
 *
 */

package com.owncloud.android.lib.resources.files;

import java.io.File;

import org.apache.jackrabbit.webdav.client.methods.DavMethodBase;

import com.owncloud.android.lib.common.OwnCloudClient;
import com.owncloud.android.lib.common.network.WebdavUtils;
import com.owncloud.android.lib.common.operations.RemoteOperation;
import com.owncloud.android.lib.common.operations.RemoteOperationResult;
import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
import com.owncloud.android.lib.common.utils.Log_OC;
import com.owncloud.android.lib.resources.status.OwnCloudVersion;


/**
 * Remote operation performing the rename of a remote file or folder in the ownCloud server.
 *
 * @author David A. Velasco
 * @author masensio
 */
public class RenameRemoteFileOperation extends RemoteOperation {

    private static final String TAG = RenameRemoteFileOperation.class.getSimpleName();

    private static final int RENAME_READ_TIMEOUT = 600000;
    private static final int RENAME_CONNECTION_TIMEOUT = 5000;

    private String mOldName;
    private String mOldRemotePath;
    private String mNewName;
    private String mNewRemotePath;


    /**
     * Constructor
     *
     * @param oldName       Old name of the file.
     * @param oldRemotePath Old remote path of the file.
     * @param newName       New name to set as the name of file.
     * @param isFolder      'true' for folder and 'false' for files
     */
    public RenameRemoteFileOperation(String oldName, String oldRemotePath, String newName,
                                     boolean isFolder) {
        mOldName = oldName;
        mOldRemotePath = oldRemotePath;
        mNewName = newName;

        String parent = (new File(mOldRemotePath)).getParent();
        parent = (parent.endsWith(FileUtils.PATH_SEPARATOR)) ? parent : parent +
            FileUtils.PATH_SEPARATOR;
        mNewRemotePath = parent + mNewName;
        if (isFolder) {
            mNewRemotePath += FileUtils.PATH_SEPARATOR;
        }
    }

    /**
     * Performs the rename operation.
     *
     * @param client Client object to communicate with the remote ownCloud server.
     */
    @Override
    protected RemoteOperationResult run(OwnCloudClient client) {
        RemoteOperationResult result = null;

        LocalMoveMethod move = null;

        OwnCloudVersion version = client.getOwnCloudVersion();
        boolean versionWithForbiddenChars =
            (version != null && version.isVersionWithForbiddenCharacters());
        boolean noInvalidChars = FileUtils.isValidPath(mNewRemotePath, versionWithForbiddenChars);

        if (noInvalidChars) {
            try {
                if (mNewName.equals(mOldName)) {
                    return new RemoteOperationResult(ResultCode.OK);
                }

                // check if a file with the new name already exists
                if (client.existsFile(mNewRemotePath)) {
                    return new RemoteOperationResult(ResultCode.INVALID_OVERWRITE);
                }

                move = new LocalMoveMethod(client.getWebdavUri() +
                    WebdavUtils.encodePath(mOldRemotePath),
                    client.getWebdavUri() + WebdavUtils.encodePath(mNewRemotePath));
                client.executeMethod(move, RENAME_READ_TIMEOUT, RENAME_CONNECTION_TIMEOUT);
                result = new RemoteOperationResult(move.succeeded(), move);
                Log_OC.i(TAG, "Rename " + mOldRemotePath + " to " + mNewRemotePath + ": " +
                            result.getLogMessage()
                );
                client.exhaustResponse(move.getResponseBodyAsStream());

            } catch (Exception e) {
                result = new RemoteOperationResult(e);
                Log_OC.e(TAG, "Rename " + mOldRemotePath + " to " +
                    ((mNewRemotePath == null) ? mNewName : mNewRemotePath) + ": " +
                    result.getLogMessage(), e);

            } finally {
                if (move != null)
                    move.releaseConnection();
            }

        } else {
            result = new RemoteOperationResult(ResultCode.INVALID_CHARACTER_IN_NAME);
        }

        return result;
    }

    /**
     * Move operation
     */
    private class LocalMoveMethod extends DavMethodBase {

        public LocalMoveMethod(String uri, String dest) {
            super(uri);
            addRequestHeader(new org.apache.commons.httpclient.Header("Destination", dest));
        }

        @Override
        public String getName() {
            return "MOVE";
        }

        @Override
        protected boolean isSuccess(int status) {
            return status == 201 || status == 204;
        }

    }

}