Add a receipts parser.

src/receipts.rs

@@ -0,0 +1,44 @@
+use minidom::Element;
+
+use error::Error;
+
+use ns::RECEIPTS_NS;
+
+#[derive(Debug)]
+pub enum Receipt {
+    Request,
+    Received(String),
+}
+
+pub fn parse_receipt(root: &Element) -> Result<Receipt, Error> {
+    for _ in root.children() {
+        return Err(Error::ParseError("Unknown child in receipt element."));
+    }
+    if root.is("request", RECEIPTS_NS) {
+        Ok(Receipt::Request)
+    } else if root.is("received", RECEIPTS_NS) {
+        let id = root.attr("id").unwrap_or("").to_owned();
+        Ok(Receipt::Received(id))
+    } else {
+        Err(Error::ParseError("This is not a receipt element."))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use minidom::Element;
+    //use error::Error;
+    use receipts;
+
+    #[test]
+    fn test_simple() {
+        let elem: Element = "<request xmlns='urn:xmpp:receipts'/>".parse().unwrap();
+        receipts::parse_receipt(&elem).unwrap();
+
+        let elem: Element = "<received xmlns='urn:xmpp:receipts'/>".parse().unwrap();
+        receipts::parse_receipt(&elem).unwrap();
+
+        let elem: Element = "<received xmlns='urn:xmpp:receipts' id='coucou'/>".parse().unwrap();
+        receipts::parse_receipt(&elem).unwrap();
+    }
+}