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+/*
+ * -*- Mode:Vala; indent-tabs-mode:t; tab-width:4; encoding:utf8 -*-
+ * Copyright 2016 Canonical Ltd.
+ *
+ * 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; version 3.
+ *
+ * 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/>.
+ *
+ * Authors:
+ * Xavi Garcia <xavi.garcia.mena@canonical.com>
+ */
+
+using PulseAudio;
+using Notify;
+using Gee;
+
+[DBus (name="com.canonical.UnityGreeter.List")]
+interface GreeterListInterfaceAccess : Object
+{
+ public abstract async string get_active_entry () throws IOError;
+ public signal void entry_selected (string entry_name);
+}
+
+public class AccountsServiceAccess : Object
+{
+ private DBusProxy _user_proxy;
+ private GreeterListInterfaceAccess _greeter_proxy;
+ private double _volume = 0.0;
+ private string _last_running_player = "";
+ private bool _mute = false;
+ private Cancellable _dbus_call_cancellable;
+
+ public AccountsServiceAccess ()
+ {
+ _dbus_call_cancellable = new Cancellable ();
+ setup_accountsservice.begin ();
+ }
+
+ ~AccountsServiceAccess ()
+ {
+ _dbus_call_cancellable.cancel ();
+ }
+
+ public string last_running_player
+ {
+ get
+ {
+ return _last_running_player;
+ }
+ set
+ {
+ sync_last_running_player_to_accountsservice.begin (value);
+ }
+ }
+
+ public bool mute
+ {
+ get
+ {
+ return _mute;
+ }
+ set
+ {
+ sync_mute_to_accountsservice.begin (value);
+ }
+ }
+
+ public double volume
+ {
+ get
+ {
+ return _volume;
+ }
+ set
+ {
+ sync_volume_to_accountsservice.begin (value);
+ }
+ }
+
+ /* AccountsService operations */
+ private void accountsservice_props_changed_cb (DBusProxy proxy, Variant changed_properties, string[]? invalidated_properties)
+ {
+ Variant volume_variant = changed_properties.lookup_value ("Volume", VariantType.DOUBLE);
+ if (volume_variant != null) {
+ var volume = volume_variant.get_double ();
+ if (volume >= 0 && _volume != volume) {
+ _volume = volume;
+ this.notify_property("volume");
+ }
+ }
+
+ Variant mute_variant = changed_properties.lookup_value ("Muted", VariantType.BOOLEAN);
+ if (mute_variant != null) {
+ _mute = mute_variant.get_boolean ();
+ this.notify_property("mute");
+ }
+
+ Variant last_running_player_variant = changed_properties.lookup_value ("LastRunningPlayer", VariantType.STRING);
+ if (last_running_player_variant != null) {
+ _last_running_player = last_running_player_variant.get_string ();
+ this.notify_property("last-running-player");
+ }
+ }
+
+ private async void setup_user_proxy (string? username_in = null)
+ {
+ var username = username_in;
+ _user_proxy = null;
+
+ // Look up currently selected greeter user, if asked
+ if (username == null) {
+ try {
+ username = yield _greeter_proxy.get_active_entry ();
+ if (username == "" || username == null)
+ return;
+ } catch (GLib.Error e) {
+ warning ("unable to find Accounts path for user %s: %s", username == null ? "null" : username, e.message);
+ return;
+ }
+ }
+
+ // Get master AccountsService object
+ DBusProxy accounts_proxy;
+ try {
+ accounts_proxy = yield DBusProxy.create_for_bus (BusType.SYSTEM, DBusProxyFlags.DO_NOT_LOAD_PROPERTIES | DBusProxyFlags.DO_NOT_CONNECT_SIGNALS, null, "org.freedesktop.Accounts", "/org/freedesktop/Accounts", "org.freedesktop.Accounts");
+ } catch (GLib.Error e) {
+ warning ("unable to get greeter proxy: %s", e.message);
+ return;
+ }
+
+ // Find user's AccountsService object
+ try {
+ var user_path_variant = yield accounts_proxy.call ("FindUserByName", new Variant ("(s)", username), DBusCallFlags.NONE, -1);
+ string user_path;
+ if (user_path_variant.check_format_string ("(o)", true)) {
+ user_path_variant.get ("(o)", out user_path);
+ _user_proxy = yield DBusProxy.create_for_bus (BusType.SYSTEM, DBusProxyFlags.GET_INVALIDATED_PROPERTIES, null, "org.freedesktop.Accounts", user_path, "com.ubuntu.AccountsService.Sound");
+ } else {
+ warning ("Unable to find user name after calling FindUserByName. Expected type: %s and obtained %s", "(o)", user_path_variant.get_type_string () );
+ return;
+ }
+ } catch (GLib.Error e) {
+ warning ("unable to find Accounts path for user %s: %s", username, e.message);
+ return;
+ }
+
+ // Get current values and listen for changes
+ _user_proxy.g_properties_changed.connect (accountsservice_props_changed_cb);
+ try {
+ var props_variant = yield _user_proxy.get_connection ().call (_user_proxy.get_name (), _user_proxy.get_object_path (), "org.freedesktop.DBus.Properties", "GetAll", new Variant ("(s)", _user_proxy.get_interface_name ()), null, DBusCallFlags.NONE, -1);
+ if (props_variant.check_format_string ("(@a{sv})", true)) {
+ Variant props;
+ props_variant.get ("(@a{sv})", out props);
+ accountsservice_props_changed_cb(_user_proxy, props, null);
+ } else {
+ warning ("Unable to get accounts service properties after calling GetAll. Expected type: %s and obtained %s", "(@a{sv})", props_variant.get_type_string () );
+ return;
+ }
+ } catch (GLib.Error e) {
+ debug("Unable to get properties for user %s at first try: %s", username, e.message);
+ }
+ }
+
+ private void greeter_user_changed (string username)
+ {
+ setup_user_proxy.begin (username);
+ }
+
+ private async void setup_accountsservice ()
+ {
+ if (Environment.get_variable ("XDG_SESSION_CLASS") == "greeter") {
+ try {
+ _greeter_proxy = yield Bus.get_proxy (BusType.SESSION, "com.canonical.UnityGreeter", "/list");
+ } catch (GLib.Error e) {
+ warning ("unable to get greeter proxy: %s", e.message);
+ return;
+ }
+ _greeter_proxy.entry_selected.connect (greeter_user_changed);
+ yield setup_user_proxy ();
+ } else {
+ // We are in a user session. We just need our own proxy
+ unowned string username = Environment.get_variable ("USER");
+ if (username != null && username != "") {
+ yield setup_user_proxy (username);
+ }
+ }
+ }
+
+ private async void sync_last_running_player_to_accountsservice (string last_running_player)
+ {
+ if (_user_proxy == null)
+ return;
+
+ try {
+ yield _user_proxy.get_connection ().call (_user_proxy.get_name (), _user_proxy.get_object_path (), "org.freedesktop.DBus.Properties", "Set", new Variant ("(ssv)", _user_proxy.get_interface_name (), "LastRunningPlayer", new Variant ("s", last_running_player)), null, DBusCallFlags.NONE, -1, _dbus_call_cancellable);
+ } catch (GLib.Error e) {
+ warning ("unable to sync last running player %s to AccountsService: %s",last_running_player, e.message);
+ }
+ _last_running_player = last_running_player;
+ }
+
+ private async void sync_volume_to_accountsservice (double volume)
+ {
+ if (_user_proxy == null)
+ return;
+
+ try {
+ yield _user_proxy.get_connection ().call (_user_proxy.get_name (), _user_proxy.get_object_path (), "org.freedesktop.DBus.Properties", "Set", new Variant ("(ssv)", _user_proxy.get_interface_name (), "Volume", new Variant ("d", volume)), null, DBusCallFlags.NONE, -1, _dbus_call_cancellable);
+ } catch (GLib.Error e) {
+ warning ("unable to sync volume %f to AccountsService: %s", volume, e.message);
+ }
+ }
+
+ private async void sync_mute_to_accountsservice (bool mute)
+ {
+ if (_user_proxy == null)
+ return;
+
+ try {
+ yield _user_proxy.get_connection ().call (_user_proxy.get_name (), _user_proxy.get_object_path (), "org.freedesktop.DBus.Properties", "Set", new Variant ("(ssv)", _user_proxy.get_interface_name (), "Muted", new Variant ("b", mute)), null, DBusCallFlags.NONE, -1, _dbus_call_cancellable);
+ } catch (GLib.Error e) {
+ warning ("unable to sync mute %s to AccountsService: %s", mute ? "true" : "false", e.message);
+ }
+ }
+}
+
+