properties.rs - mozsearch

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extern crate dbus;

use dbus::{Connection, BusType, stdintf, arg};

use std::collections::HashMap;

fn print_refarg(value: &arg::RefArg) {

    // We don't know what type the value is. We'll try a few and fall back to

    // debug printing if the value is more complex than that.

    if let Some(s) = value.as_str() { println!("{}", s); }

    else if let Some(i) = value.as_i64() { println!("{}", i); }

    else { println!("{:?}", value); }

fn main() {

    // Connect to server and create a ConnPath. A ConnPath implements several interfaces,

    // in this case we'll use OrgFreedesktopDBusProperties, which allows us to call "get".

    let c = Connection::get_private(BusType::Session).unwrap();

    let p = c.with_path("org.mpris.MediaPlayer2.rhythmbox", "/org/mpris/MediaPlayer2", 5000);

    use stdintf::org_freedesktop_dbus::Properties;

    // The Metadata property is a Dict<String, Variant>.

    // Option 1: we can get the dict straight into a hashmap, like this:

    let metadata: HashMap<String, arg::Variant<Box<arg::RefArg>>> = p.get("org.mpris.MediaPlayer2.Player", "Metadata").unwrap();

    println!("Option 1:");

    // We now iterate over the hashmap.

    for (key, value) in metadata.iter() {

        print!("  {}: ", key);

        print_refarg(&value);

    // Option 2: we can get the entire dict as a RefArg and get the values out by iterating over it.

    let metadata: Box<arg::RefArg> = p.get("org.mpris.MediaPlayer2.Player", "Metadata").unwrap();

    // When using "as_iter()" for a dict, we'll get one key, it's value, next key, it's value, etc.

    let mut iter = metadata.as_iter().unwrap();

    println!("Option 2:");

    while let Some(key) = iter.next() {

        // Printing the key is easy, since we know it's a String.

        print!("  {}: ", key.as_str().unwrap());

        let value = iter.next().unwrap();

        print_refarg(&value);