uri_check.h

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/*
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3,
 * as published by the Free Software Foundation.
 *
 * 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authored by: Jim Hodapp <jim.hodapp@canonical.com>
 *
 */
 
#ifndef URI_CHECK_H
#define URI_CHECK_H
 
#include <QFile>
#include <QUrl>
 
#include <memory>
 
namespace lomiri
{
namespace MediaHubService
{
 
class UriCheck
{
public:
    typedef std::shared_ptr<UriCheck> Ptr;
 
    UriCheck()
        : is_local_file_(false),
          local_file_exists_(false)
    {
    }
 
    UriCheck(const QUrl &uri)
        : uri_(uri),
          is_local_file_(determine_if_local_file()),
          local_file_exists_(determine_if_file_exists())
    {
    }
 
    virtual ~UriCheck()
    {
    }
 
    void set(const QUrl &uri)
    {
        if (uri.isEmpty())
            return;
 
        uri_ = uri;
        is_local_file_ = determine_if_local_file();
        local_file_exists_ = determine_if_file_exists();
    }
 
    void clear()
    {
        uri_.clear();
    }
 
    bool is_local_file() const
    {
        return is_local_file_;
    }
 
    bool file_exists() const
    {
        return local_file_exists_;
    }
 
protected:
    UriCheck(const UriCheck&) = delete;
    UriCheck& operator=(const UriCheck&) = delete;
 
private:
    bool determine_if_local_file()
    {
        return uri_.isLocalFile();
    }
 
    bool determine_if_file_exists()
    {
        if (!is_local_file_)
            return false;
 
        return QFile::exists(uri_.toLocalFile());
    }
 
private:
    QUrl uri_;
    bool is_local_file_;
    bool local_file_exists_;
};
 
}
}
 
#endif // URI_CHECK_H