1 files changed, 50 insertions, 0 deletions
diff --git a/third_party/rust/dbus/examples/properties.rs b/third_party/rust/dbus/examples/properties.rs
new file mode 100644
index 0000000000..a410fc2ec1
--- /dev/null
+++ b/third_party/rust/dbus/examples/properties.rs
@@ -0,0 +1,50 @@
+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);
+    }
+}