unify Client::Event and Component::Event into Event

src/event.rs

@@ -0,0 +1,38 @@
+use minidom::Element;
+
+#[derive(Debug)]
+pub enum Event {
+    Online,
+    Disconnected,
+    Stanza(Element),
+}
+
+impl Event {
+    pub fn is_online(&self) -> bool {
+        match *self {
+            Event::Online => true,
+            _ => false,
+        }
+    }
+
+    pub fn is_stanza(&self, name: &str) -> bool {
+        match *self {
+            Event::Stanza(ref stanza) => stanza.name() == name,
+            _ => false,
+        }
+    }
+
+    pub fn as_stanza(&self) -> Option<&Element> {
+        match *self {
+            Event::Stanza(ref stanza) => Some(stanza),
+            _ => None,
+        }
+    }
+
+    pub fn into_stanza(self) -> Option<Element> {
+        match self {
+            Event::Stanza(stanza) => Some(stanza),
+            _ => None,
+        }
+    }
+}