Portal API POC

main.rs

use std::collections::HashMap;
use std::error::Error;
use zbus::{Connection, zvariant};
use zbus::zvariant::Value;
use zbus::dbus_proxy;
use async_std::stream::StreamExt;

#[dbus_proxy(
interface = "org.freedesktop.portal.FileChooser",
default_service = "org.freedesktop.portal.Desktop",
default_path = "/org/freedesktop/portal/desktop"
)]
trait FileChooser {
    fn open_file(
        &self,
        parent_window: &str,
        title: &str,
        options: &HashMap<&str, Value<'_>>,
    ) -> zbus::Result<zvariant::OwnedObjectPath>;
}

#[dbus_proxy(
interface = "org.freedesktop.portal.Request",
default_service = "org.freedesktop.portal.Desktop",
default_path = "/org/freedesktop/portal/desktop"
)]
trait Request {
    fn close(&self) -> zbus::Result<()>;

    #[dbus_proxy(signal)]
    fn response(
        &self,
        response: u32,
        results: HashMap<&str, Value<'_>>,
    ) -> zbus::Result<()>;
}

#[async_std::main]
async fn main() -> Result<(), Box<dyn Error>> {
    let connection = Connection::session().await?;

    let proxy = FileChooserProxy::new(&connection).await?;

    let req_path: zvariant::OwnedObjectPath = proxy.open_file(
        "",
        "Choose a dir",
        &HashMap::from([
            ("directory", Value::Bool(true))
        ]),
    ).await?;
    println!("{:?}", req_path);

    let req = RequestProxy::builder(&connection)
        .path(req_path)?
        .build()
        .await?;

    let mut response_signal = req.receive_response().await?;

    if let Some(signal) = response_signal.next().await {
        println!("{:?}", signal.args());
    }

    Ok(())
}

// OUTPUT:        
// OwnedObjectPath(ObjectPath("/org/freedesktop/portal/desktop/request/1_195/t"))
// Ok(Response { response: 0, results: {"choices": Array(Array { element_signature: Signature("(ss)"), elements: [], signature: Signature("a(ss)") }), "uris": Array(Array { element_signature: Signature("s"), elements: [Str(Str(Borrowed("file:///mnt/CommonExtraLinuxFiles/OS/Linux/steamdeck")))], signature: Signature("as") })} })

// in the reponse object there is the path I've chosen: "file:///mnt/CommonExtraLinuxFiles/OS/Linux/steamdeck"