Add a Last Message Correction parser.

src/lib.rs

@@ -45,6 +45,9 @@ pub mod media_element;
 /// XEP-0224: Attention
 pub mod attention;
 
+/// XEP-0308: Last Message Correction
+pub mod message_correct;
+
 /// XEP-0390: Entity Capabilities 2.0
 pub mod ecaps2;
 
@@ -55,6 +58,7 @@ pub enum MessagePayload {
     ChatState(chatstates::ChatState),
     Receipt(receipts::Receipt),
     Attention(attention::Attention),
+    MessageCorrect(message_correct::MessageCorrect),
 }
 
 /// Parse one of the payloads of a `<message/>` element, and return `Some` of a
@@ -68,6 +72,8 @@ pub fn parse_message_payload(elem: &Element) -> Option<MessagePayload> {
         Some(MessagePayload::Receipt(receipt))
     } else if let Ok(attention) = attention::parse_attention(elem) {
         Some(MessagePayload::Attention(attention))
+    } else if let Ok(replace) = message_correct::parse_message_correct(elem) {
+        Some(MessagePayload::MessageCorrect(replace))
     } else {
         None
     }

src/message_correct.rs

@@ -0,0 +1,45 @@
+use minidom::Element;
+
+use error::Error;
+
+use ns;
+
+#[derive(Debug, Clone)]
+pub enum MessageCorrect {
+    Replace(String),
+}
+
+pub fn parse_message_correct(root: &Element) -> Result<MessageCorrect, Error> {
+    if !root.is("replace", ns::MESSAGE_CORRECT) {
+        return Err(Error::ParseError("This is not a replace element."));
+    }
+    for _ in root.children() {
+        return Err(Error::ParseError("Unknown child in replace element."));
+    }
+    let id = root.attr("id").unwrap_or("").to_owned();
+    Ok(MessageCorrect::Replace(id))
+}
+
+#[cfg(test)]
+mod tests {
+    use minidom::Element;
+    use error::Error;
+    use message_correct;
+
+    #[test]
+    fn test_simple() {
+        let elem: Element = "<replace xmlns='urn:xmpp:message-correct:0'/>".parse().unwrap();
+        message_correct::parse_message_correct(&elem).unwrap();
+    }
+
+    #[test]
+    fn test_invalid_child() {
+        let elem: Element = "<replace xmlns='urn:xmpp:message-correct:0'><coucou/></replace>".parse().unwrap();
+        let error = message_correct::parse_message_correct(&elem).unwrap_err();
+        let message = match error {
+            Error::ParseError(string) => string,
+            _ => panic!(),
+        };
+        assert_eq!(message, "Unknown child in replace element.");
+    }
+}

src/ns.rs

@@ -28,6 +28,9 @@ pub const MEDIA_ELEMENT: &'static str = "urn:xmpp:media-element";
 /// XEP-0224: Attention
 pub const ATTENTION: &'static str = "urn:xmpp:attention:0";
 
+/// XEP-0308: Last Message Correction
+pub const MESSAGE_CORRECT: &'static str = "urn:xmpp:message-correct:0";
+
 /// XEP-0390: Entity Capabilities 2.0
 pub const ECAPS2: &'static str = "urn:xmpp:caps";
 /// XEP-0390: Entity Capabilities 2.0