use dbus::blocking::stdintf::org_freedesktop_dbus::PropertiesPropertiesChanged;
use dbus::blocking::Connection;
use dbus::message::Message;
use std::time::Duration;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let conn = Connection::new_session()?;

    let proxy = conn.with_proxy(
        "org.mpris.MediaPlayer2.spotify",
        "/org/mpris/MediaPlayer2",
        Duration::from_millis(5000),
    );

    let _ = proxy.match_signal(
        |pc: PropertiesPropertiesChanged, _: &Connection, _: &Message| {
            println! {"dumping {:#x?}", pc.changed_properties["Metadata"]};
            true
        },
    );

    loop {
        conn.process(Duration::from_millis(1000))?;
    }
}