/* Copyright (C) CJ Affiliate
 *
 * You may use, distribute and modify this code under  the
 * terms of the  GNU General Public License  version 2  or
 * later.
 *
 * You should have received a copy of the license with this
 * file. If not, you will find a copy in the "LICENSE" file
 * at https://github.com/cjdev/dual-control.
 */

#ifndef SYS_SYSLOG_H
#define SYS_SYSLOG_H

#include <memory>
#include <cstdarg>
#include <syslog.h>

class sys_syslog_ifc
{
public:
    virtual ~sys_syslog_ifc() {}
    virtual void openlog (const char *ident, int logopt, int facility) {}
    virtual void vsyslog (int priority, const char *message, va_list args) {}
    virtual void closelog() {}
};

class sys_syslog
{
public:
    typedef std::shared_ptr<sys_syslog_ifc> delegate;
private:
    delegate delegate_;
public:
    sys_syslog (const delegate &delegate) : delegate_ (delegate) {}
    sys_syslog() : sys_syslog (delegate (new sys_syslog_ifc)) {}
    void openlog (const char *ident, int logopt, int facility)
    {
        delegate_->openlog (ident, logopt, facility);
    }
    void syslog (int priority, const char *format, ...)
    {
        va_list vargs;
        va_start (vargs, format);
        vsyslog (priority, format, vargs);
        va_end (vargs);
    }
    void vsyslog (int priority, const char *message, va_list vargs)
    {
        delegate_->vsyslog (priority, message, vargs);
    }
    void closelog()
    {
        delegate_->closelog();
    }

    static sys_syslog create();
};

#endif