/*******************************************************************************
 **
 ** smolbote: yet another qute browser
 ** Copyright (C) 2017  Xian Nox
 **
 ** 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/>.
 **
 ******************************************************************************/

#include "regexp.h"

RegExp::RegExp(const QString &pattern, PatternOptions options) :
    QRegularExpression()
{
    setPattern(pattern);
    setPatternOptions(options);
}

bool RegExp::hasMatch(const QString &subject, int offset, MatchType matchType, MatchOptions matchOptions) const
{
    // Empty matches all
    if(pattern().isEmpty()) {
        return true;
    }

    return QRegularExpression::match(subject, offset, matchType, matchOptions).hasMatch();
}

void RegExp::setWildcardPattern(const QString &pattern)
{
    QString parsed;

    for(int i=0; i<pattern.length(); i++) {
        const QChar c = pattern.at(i);
        switch (c.toLatin1()) {
        case '*':
            // remove * at the start and end
            if(i != 0 && i != pattern.length()-1) {
                parsed.append(".*");
            }
            break;
        case '^':
            parsed.append("(?:[^\\w\\d\\_\\-\\.\\%]|$)");
            break;
        case '|':
            if(i == 0) {
                // beginning of string
                parsed.append('^');
            } else {
                // end of string
                parsed.append('$');
            }
            break;
        default:
            parsed.append(c);
            break;
        }
    }

    setPattern(parsed);
}