/*
 * Autopsy Forensic Browser
 * 
 * Copyright 2013-2014 Basis Technology Corp.
 * Contact: carrier <at> sleuthkit <dot> org
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sleuthkit.autopsy.coreutils;

import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.sleuthkit.autopsy.casemodule.Case;

/**
 * Validates absolute path (e.g. to a data source or case output folder)
 * depending on case type.
 */
public final class PathValidator {

    private static final Pattern driveLetterPattern = Pattern.compile("^[Cc]:.*$");

    public static boolean isValid(String path, Case.CaseType caseType) {

        if (caseType == Case.CaseType.MULTI_USER_CASE) {
            // check that path is not on "C:" drive
            if (pathOnCDrive(path)) {
                return false;
            }
        } else {
            // single user case - no validation needed
        }

        return true;
    }

    /**
     * Checks whether a file path contains drive letter defined by pattern.
     *
     * @param filePath Input file absolute path
     *
     * @return true if path matches the pattern, false otherwise.
     */
    private static boolean pathOnCDrive(String filePath) {
        Matcher m = driveLetterPattern.matcher(filePath);
        return m.find();
    }
}