[PATCH v2] client: Add battery percentage to info command

[Sonny Sasaka <sonnysasaka@xxxxxxxxxxxx>]

This adds the Battery Percentage to the info command based on
org.bluez.Battery1 API. Example usage:

[bluetooth]# info XX:XX:XX:XX:XX:XX
Device XX:XX:XX:XX:XX:XX (random)
        Name: ...
        Alias: ...
        ...
        Modalias: ...
        Battery Percentage: 100%
---
 client/main.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/client/main.c b/client/main.c
index 422da5593..4b787240e 100644
--- a/client/main.c
+++ b/client/main.c
@@ -65,6 +65,7 @@ static struct adapter *default_ctrl;
 static GDBusProxy *default_dev;
 static GDBusProxy *default_attr;
 static GList *ctrl_list;
+static GList *battery_proxies;
 
 static const char *agent_arguments[] = {
 	"on",
@@ -107,7 +108,9 @@ static void disconnect_handler(DBusConnection *connection, void *user_data)
 	bt_shell_set_prompt(PROMPT_OFF);
 
 	g_list_free_full(ctrl_list, proxy_leak);
+	g_list_free_full(battery_proxies, proxy_leak);
 	ctrl_list = NULL;
+	battery_proxies = NULL;
 
 	default_ctrl = NULL;
 }
@@ -445,6 +448,16 @@ done:
 	g_free(desc);
 }
 
+static void battery_added(GDBusProxy *proxy)
+{
+	battery_proxies = g_list_append(battery_proxies, proxy);
+}
+
+static void battery_removed(GDBusProxy *proxy)
+{
+	battery_proxies = g_list_remove(battery_proxies, proxy);
+}
+
 static void device_added(GDBusProxy *proxy)
 {
 	DBusMessageIter iter;
@@ -539,6 +552,8 @@ static void proxy_added(GDBusProxy *proxy, void *user_data)
 		gatt_add_manager(proxy);
 	} else if (!strcmp(interface, "org.bluez.LEAdvertisingManager1")) {
 		ad_manager_added(proxy);
+	} else if (!strcmp(interface, "org.bluez.Battery1")) {
+		battery_added(proxy);
 	}
 }
 
@@ -630,6 +645,8 @@ static void proxy_removed(GDBusProxy *proxy, void *user_data)
 		gatt_remove_manager(proxy);
 	} else if (!strcmp(interface, "org.bluez.LEAdvertisingManager1")) {
 		ad_unregister(dbus_conn, NULL);
+	} else if (!strcmp(interface, "org.bluez.Battery1")) {
+		battery_removed(proxy);
 	}
 }
 
@@ -763,6 +780,20 @@ static struct adapter *find_ctrl_by_address(GList *source, const char *address)
 	return NULL;
 }
 
+static GDBusProxy *find_battery_by_path(GList *source, const char *path)
+{
+	GList *list;
+
+	for (list = g_list_first(source); list; list = g_list_next(list)) {
+		GDBusProxy *proxy = list->data;
+
+		if (strcmp(g_dbus_proxy_get_path(proxy), path) == 0)
+			return proxy;
+	}
+
+	return NULL;
+}
+
 static GDBusProxy *find_proxy_by_address(GList *source, const char *address)
 {
 	GList *list;
@@ -1606,8 +1637,10 @@ static struct GDBusProxy *find_device(int argc, char *argv[])
 static void cmd_info(int argc, char *argv[])
 {
 	GDBusProxy *proxy;
+	GDBusProxy *battery_proxy;
 	DBusMessageIter iter;
 	const char *address;
+	unsigned char percentage;
 
 	proxy = find_device(argc, argv);
 	if (!proxy)
@@ -1647,6 +1680,16 @@ static void cmd_info(int argc, char *argv[])
 	print_property(proxy, "AdvertisingFlags");
 	print_property(proxy, "AdvertisingData");
 
+	battery_proxy = find_battery_by_path(battery_proxies,
+					g_dbus_proxy_get_path(proxy));
+	if (battery_proxy && g_dbus_proxy_get_property(
+				battery_proxy, "Percentage", &iter)) {
+		dbus_message_iter_get_basic(&iter, &percentage);
+		bt_shell_printf("\tBattery Percentage: %d%%\n", percentage);
+	} else {
+		bt_shell_printf("\tNo battery information\n");
+	}
+
 	return bt_shell_noninteractive_quit(EXIT_SUCCESS);
 }
 
-- 
2.17.1