Add DBUS stubs for a basic Channel type

src/padfoot/channel.rs

@@ -0,0 +1,54 @@
+#[allow(clippy::module_inception)]
+mod channel;
+pub use channel::*;
+
+mod messages;
+pub use messages::*;
+
+mod type_text;
+pub use type_text::*;
+
+use crate::telepathy;
+
+// FIXME: I'm assuming that all channels will be of type text and 1-1 for now.
+#[derive(Debug)]
+pub struct Channel {
+}
+
+// "This SHOULD NOT include the channel type and channel interface itself"
+pub fn channel_interfaces() -> Vec<String> {
+    vec![
+        "org.freedesktop.Telepathy.Channel.Interface.Messages".to_string(),
+    ]
+}
+
+type Result<T> = std::result::Result<T, dbus::tree::MethodErr>;
+
+impl Channel {
+    fn build_tree(self) -> dbus::tree::Tree<dbus::tree::MTFn, ()> {
+        let c_rc = std::rc::Rc::new(self);
+        let f = dbus::tree::Factory::new_fn::<()>();
+        let mut tree = f.tree(());
+
+        let c_rc1 = c_rc.clone();
+        let chan_iface = telepathy::channel_server(&f, (), move |_| c_rc1.clone());
+
+        let c_rc2 = c_rc.clone();
+        let messages_iface =
+            telepathy::channel_interface_messages_server(&f, (), move |_| c_rc2.clone());
+
+        let type_text_iface =
+            telepathy::channel_type_text_server(&f, (), move |_| c_rc.clone());
+
+        tree = tree.add(
+            f.object_path("", ())
+                .introspectable()
+                .add(chan_iface)
+                .add(messages_iface)
+                .add(type_text_iface),
+        );
+        tree = tree.add(f.object_path("/", ()).introspectable());
+
+        tree
+    }
+}