1 files changed, 235 insertions, 0 deletions
diff --git a/src/accounts-service-access.vala b/src/accounts-service-access.vala
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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);
+		}
+	}
+}
+
+