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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-timedated.h>
#include <gio/gio.h>
#include <cerrno>
#include <cstdlib>
namespace unity {
namespace indicator {
namespace datetime {
/***
****
***/
class TimedatedTimezone::Impl
{
public:
Impl(TimedatedTimezone& owner, std::string filename):
m_owner(owner),
m_filename(filename)
{
g_debug("Filename is '%s'", filename.c_str());
monitor_timezone_property();
}
~Impl()
{
clear();
}
private:
void clear()
{
if (m_connection && m_signal_subscription_id)
{
g_dbus_connection_signal_unsubscribe (m_connection, m_signal_subscription_id);
m_signal_subscription_id = 0;
}
g_clear_object(&m_connection);
}
static void on_properties_changed (GDBusConnection *connection G_GNUC_UNUSED,
const gchar *sender_name G_GNUC_UNUSED,
const gchar *object_path G_GNUC_UNUSED,
const gchar *interface_name G_GNUC_UNUSED,
const gchar *signal_name G_GNUC_UNUSED,
GVariant *parameters,
gpointer gself)
{
auto self = static_cast<Impl*>(gself);
const char *tz;
GVariant *changed_properties;
gchar **invalidated_properties;
g_variant_get (parameters, "(s@a{sv}^as)", NULL, &changed_properties, &invalidated_properties);
if (g_variant_lookup(changed_properties, "Timezone", "&s", &tz, NULL))
self->notify_timezone(tz);
else if (g_strv_contains (invalidated_properties, "Timezone"))
self->notify_timezone(self->get_timezone_from_file(self->m_filename));
g_variant_unref (changed_properties);
g_strfreev (invalidated_properties);
}
void monitor_timezone_property()
{
GError *err = nullptr;
/*
* There is an unlikely race which happens if there is an activation
* and timezone change before our match rule is added.
*/
notify_timezone(get_timezone_from_file(m_filename));
/*
* Make sure the bus is around at least until we add the match rules,
* otherwise things (tests) are sad.
*/
m_connection = g_bus_get_sync(G_BUS_TYPE_SYSTEM,
nullptr,
&err);
if (err)
{
g_warning("Couldn't get bus connection: '%s'", err->message);
g_error_free(err);
return;
}
m_signal_subscription_id = g_dbus_connection_signal_subscribe(m_connection,
"org.freedesktop.timedate1",
"org.freedesktop.DBus.Properties",
"PropertiesChanged",
"/org/freedesktop/timedate1",
NULL, G_DBUS_SIGNAL_FLAGS_NONE,
on_properties_changed,
this, nullptr);
}
void notify_timezone(std::string new_timezone)
{
g_debug("notify_timezone '%s'", new_timezone.c_str());
if (!new_timezone.empty())
m_owner.timezone.set(new_timezone);
}
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);
} else
/* Default to UTC */
ret = "Etc/Utc";
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;
}
/***
****
***/
TimedatedTimezone & m_owner;
GDBusConnection *m_connection = nullptr;
unsigned long m_signal_subscription_id = 0;
std::string m_filename;
};
/***
****
***/
TimedatedTimezone::TimedatedTimezone(std::string filename):
impl(new Impl{*this, filename})
{
}
TimedatedTimezone::~TimedatedTimezone()
{
}
/***
****
***/
} // namespace datetime
} // namespace indicator
} // namespace unity
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