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/*
* Copyright 2013 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU 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 warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY, 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/>.
*
* Authors:
* Charles Kerr <charles.kerr@canonical.com>
*/
#include <datetime/timezone-file.h>
#include <cerrno>
#include <cstdlib>
namespace
{
std::string get_timezone_from_file(const std::string& filename)
{
GError * error;
GIOChannel * io_channel;
std::string ret;
// read through filename line-by-line until we fine a nonempty non-comment line
error = nullptr;
io_channel = g_io_channel_new_file(filename.c_str(), "r", &error);
if (error == nullptr)
{
auto line = g_string_new(nullptr);
while(ret.empty())
{
const auto io_status = g_io_channel_read_line_string(io_channel, line, nullptr, &error);
if ((io_status == G_IO_STATUS_EOF) || (io_status == G_IO_STATUS_ERROR))
break;
if (error != nullptr)
break;
g_strstrip(line->str);
if (!line->len) // skip empty lines
continue;
if (*line->str=='#') // skip comments
continue;
ret = line->str;
}
g_string_free(line, true);
}
if (io_channel != nullptr)
{
g_io_channel_shutdown(io_channel, false, nullptr);
g_io_channel_unref(io_channel);
}
if (error != nullptr)
{
g_warning("%s Unable to read timezone file '%s': %s", G_STRLOC, filename.c_str(), error->message);
g_error_free(error);
}
return ret;
}
}
namespace unity {
namespace indicator {
namespace datetime {
FileTimezone::FileTimezone()
{
}
FileTimezone::FileTimezone(const std::string& filename)
{
set_filename(filename);
}
FileTimezone::~FileTimezone()
{
clear();
}
void
FileTimezone::clear()
{
if (m_monitor_handler_id)
g_signal_handler_disconnect(m_monitor, m_monitor_handler_id);
g_clear_object (&m_monitor);
m_filename.clear();
}
void
FileTimezone::set_filename(const std::string& filename)
{
clear();
auto tmp = realpath(filename.c_str(), nullptr);
if(tmp != nullptr)
{
m_filename = tmp;
free(tmp);
}
else
{
g_warning("Unable to resolve path '%s': %s", filename.c_str(), g_strerror(errno));
m_filename = filename; // better than nothing?
}
auto file = g_file_new_for_path(m_filename.c_str());
GError * err = nullptr;
m_monitor = g_file_monitor_file(file, G_FILE_MONITOR_NONE, nullptr, &err);
g_object_unref(file);
if (err)
{
g_warning("%s Unable to monitor timezone file '%s': %s", G_STRLOC, TIMEZONE_FILE, err->message);
g_error_free(err);
}
else
{
m_monitor_handler_id = g_signal_connect_swapped(m_monitor, "changed", G_CALLBACK(on_file_changed), this);
g_debug("%s Monitoring timezone file '%s'", G_STRLOC, m_filename.c_str());
}
reload();
}
void
FileTimezone::on_file_changed(gpointer gself)
{
static_cast<FileTimezone*>(gself)->reload();
}
void
FileTimezone::reload()
{
const auto new_timezone = get_timezone_from_file(m_filename);
if (!new_timezone.empty())
timezone.set(new_timezone);
}
} // namespace datetime
} // namespace indicator
} // namespace unity
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