/**
 * Copyright (C) 2011 BonitaSoft S.A.
 * BonitaSoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * 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 2.0 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.bonitasoft.web.toolkit.client.data.item.attribute.validator;

import static org.bonitasoft.web.toolkit.client.common.i18n.AbstractI18n._;

import java.util.Arrays;
import java.util.List;

import org.bonitasoft.web.toolkit.client.common.texttemplate.Arg;
import org.bonitasoft.web.toolkit.client.ui.utils.ListUtils;

/**
 * @author Séverin Moussel
 * 
 */
public class FileExtensionAllowedValidator extends AbstractStringFormatValidator {

    private final List<String> extensions;

    public FileExtensionAllowedValidator(final String extension) {
        super(makeRegexp(extension));
        this.extensions = Arrays.asList(extension);
    }

    public FileExtensionAllowedValidator(final String... extensions) {
        super(makeRegexp(extensions));
        this.extensions = Arrays.asList(extensions);
    }

    public FileExtensionAllowedValidator(final List<String> extensions) {
        super(makeRegexp(extensions));
        this.extensions = extensions;
    }

    private static String makeRegexp(final String extension) {
        return "\\.(" + extension + ")$";
    }

    private static String makeRegexp(final String[] extensions) {
        final StringBuilder sb = new StringBuilder();
        for (final String extension : extensions) {
            sb.append(extension).append("|");
        }
        return "\\.(" + sb.toString().substring(0, sb.length() - 1) + ")$";
    }

    private static String makeRegexp(final List<String> extensions) {
        final StringBuilder sb = new StringBuilder();
        for (final String extension : extensions) {
            sb.append(extension).append("|");
        }
        return "\\.(" + sb.toString().substring(0, sb.length() - 1) + ")$";
    }

    @Override
    protected String defineErrorMessage() {
        return _("%attribute% file format is not allowed. Only %file_formats% files are allowed.",
                new Arg("file_formats", ListUtils.join(this.extensions, ", ", " " + _("or") + " ", "\".", "\"")));

    }
}