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/**
 * The MIT License (MIT)
 * Copyright (c) 2017 Hubio
 *
 * 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.hubio.s3sftp.server;

import com.upplication.s3fs.S3Path;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;

/**
 * Ensures that an {@link S3Path} always starts with a given prefix (e.g. bucket).
 *
 * Does not check that the path being enhanced and the prefix will have a directory separator between them.
 *
 * @author Paul Campbell ([email protected])
 */
@Slf4j
@RequiredArgsConstructor
class FixedPrefixS3PathEnhancer implements S3PathEnhancer {

    private final String prefix;

    @Override
    public S3Path apply(final S3Path path) {
        log.trace("FixedPrefixS3PathEnhancer('{}').apply('{}')", prefix, path);
        if (path.toString()
                .startsWith(prefix)) {
            return path;
        }
        return new S3Path(path.getFileSystem(), prefix + path.toString());
    }
}