feat(xmpp): initial parsing of ordinary stream events

src/protos/xmpp/client.rs

@@ -7,15 +7,15 @@ pub static XMLNS: &'static str = "jabber:client";
 
 #[derive(PartialEq, Eq, Debug)]
 pub struct Message {
-    from: Option<String>,
-    id: Option<String>,
-    to: Option<String>,
+    pub from: Option<String>,
+    pub id: Option<String>,
+    pub to: Option<String>,
     // default is Normal
-    r#type: MessageType,
-    lang: Option<String>,
+    pub r#type: MessageType,
+    pub lang: Option<String>,
 
-    subject: Option<String>,
-    body: String,
+    pub subject: Option<String>,
+    pub body: String,
 }
 impl Message {
     pub fn parse() -> impl Parser<Output = Result<Self>> {
@@ -61,6 +61,9 @@ impl Parser for MessageParser {
                         } else if attr.key.0 == b"to" {
                             let value = fail_fast!(std::str::from_utf8(&*attr.value));
                             state.to = Some(value.to_string())
+                        } else if attr.key.0 == b"type" {
+                            let value = fail_fast!(MessageType::from_str(&*attr.value));
+                            state.r#type = value;
                         }
                     }
                     Continuation::Continue(MessageParser::Outer(state))
@@ -68,8 +71,7 @@ impl Parser for MessageParser {
                     Continuation::Final(Err(ffail!("Expected start")))
                 }
             }
-            MessageParser::Outer(state) => {
-                match event {
+            MessageParser::Outer(state) => match event {
                 Event::Start(ref bytes) => {
                     if bytes.name().0 == b"subject" {
                         Continuation::Continue(MessageParser::InSubject(state))
@@ -94,45 +96,28 @@ impl Parser for MessageParser {
                         Continuation::Final(Err(ffail!("Body not found")))
                     }
                 }
-                    _ => {
-                        Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}")))
-                    }
-                }
+                _ => Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}"))),
             },
-            MessageParser::InSubject(mut state) => {
-                match event {
+            MessageParser::InSubject(mut state) => match event {
                 Event::Text(ref bytes) => {
                     let subject = fail_fast!(std::str::from_utf8(&*bytes));
                     state.subject = Some(subject.to_string());
                     Continuation::Continue(MessageParser::InSubject(state))
                 }
-                    Event::End(_) => {
-                        Continuation::Continue(MessageParser::Outer(state))
-                    }
-                    _ => {
-                        Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}")))
-                    }
-                }
-            }
-            MessageParser::InBody(mut state) => {
-                match event {
-                    Event::Text(ref bytes) =>{
-                        match std::str::from_utf8(&*bytes) {
+                Event::End(_) => Continuation::Continue(MessageParser::Outer(state)),
+                _ => Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}"))),
+            },
+            MessageParser::InBody(mut state) => match event {
+                Event::Text(ref bytes) => match std::str::from_utf8(&*bytes) {
                     Ok(subject) => {
                         state.body = Some(subject.to_string());
                         Continuation::Continue(MessageParser::InBody(state))
                     }
                     Err(err) => Continuation::Final(Err(err.into())),
-                        }
-                    }
-                    Event::End(_) => {
-                        Continuation::Continue(MessageParser::Outer(state))
-                    }
-                    _ => {
-                        Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}")))
-                    }
-                }
-            }
+                },
+                Event::End(_) => Continuation::Continue(MessageParser::Outer(state)),
+                _ => Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}"))),
+            },
         }
     }
 }
@@ -153,8 +138,9 @@ impl Default for MessageType {
 }
 
 impl MessageType {
-    pub fn from_str(s: &str) -> Result<MessageType> {
+    pub fn from_str(s: &[u8]) -> Result<MessageType> {
         use MessageType::*;
+        let s = std::str::from_utf8(s)?;
         match s {
             "chat" => Ok(Chat),
             "error" => Ok(Error),
@@ -193,7 +179,7 @@ mod tests {
                 from: None,
                 id: Some("aacea".to_string()),
                 to: Some("nikita@vlnv.dev".to_string()),
-                r#type: MessageType::Normal,
+                r#type: MessageType::Chat,
                 lang: None,
                 subject: Some("daa".to_string()),
                 body: "bbb".to_string(),

src/protos/xmpp/mod.rs

@@ -1,8 +1,8 @@
 pub mod client;
 pub mod sasl;
+pub mod stanzaerror;
 pub mod stream;
 pub mod tls;
-pub mod stanzaerror;
 
 // Implemented as a macro instead of a fn due to borrowck limitations
 macro_rules! skip_text {

src/protos/xmpp/stream.rs

@@ -4,8 +4,10 @@ use quick_xml::name::{Namespace, QName, ResolveResult};
 use quick_xml::{NsReader, Writer};
 use tokio::io::{AsyncBufRead, AsyncWrite};
 
+use super::client::Message;
 use super::skip_text;
 use crate::prelude::*;
+use crate::util::xml::{Continuation, Parser};
 
 pub static XMLNS: &'static str = "http://etherx.jabber.org/streams";
 pub static PREFIX: &'static str = "stream";
@@ -160,8 +162,43 @@ impl Features {
     }
 }
 
+#[derive(PartialEq, Eq, Debug)]
+pub enum FromClient {
+    Message(Message),
+}
+impl FromClient {
+    pub async fn parse(
+        reader: &mut NsReader<impl AsyncBufRead + Unpin>,
+        buf: &mut Vec<u8>,
+    ) -> Result<FromClient> {
+        let incoming = skip_text!(reader, buf);
+        let start = if let Event::Start(ref bytes) = incoming {
+            bytes
+        } else {
+            return Err(ffail!("Unexpected XML event: {incoming:?}"));
+        };
+        let (ns, name) = reader.resolve_element(start.name());
+        if name.as_ref() == b"message" {
+            let mut parser = Message::parse().consume(&incoming);
+            let result = loop {
+                match parser {
+                    Continuation::Final(res) => break res,
+                    Continuation::Continue(next) => {
+                        parser = next.consume(&reader.read_event_into_async(buf).await.unwrap())
+                    }
+                }
+            }?;
+            Ok(FromClient::Message(result))
+        } else {
+            Err(ffail!("Unknown XML tag: {name:?}"))
+        }
+    }
+}
+
 #[cfg(test)]
 mod test {
+    use crate::protos::xmpp::client::MessageType;
+
     use super::*;
 
     #[tokio::test]
@@ -195,4 +232,24 @@ mod test {
         input.write_xml(&mut writer).await.unwrap();
         assert_eq!(std::str::from_utf8(&output).unwrap(), expected);
     }
+
+    #[tokio::test]
+    async fn client_message() {
+        let input = r#"<message id="aacea" type="chat" to="nikita@vlnv.dev"><subject>daa</subject><body>bbb</body></message>"#;
+        let mut reader = NsReader::from_reader(input.as_bytes());
+        let mut buf = vec![];
+        let res = FromClient::parse(&mut reader, &mut buf).await.unwrap();
+        assert_eq!(
+            res,
+            FromClient::Message(Message {
+                from: None,
+                id: Some("aacea".to_string()),
+                r#type: MessageType::Chat,
+                to: Some("nikita@vlnv.dev".to_string()),
+                lang: None,
+                subject: Some("daa".to_string()),
+                body: "bbb".to_string(),
+            })
+        )
+    }
 }

src/util/mod.rs

@@ -3,9 +3,9 @@ use crate::prelude::*;
 pub mod http;
 pub mod table;
 pub mod telemetry;
-pub mod xml;
 #[cfg(test)]
 pub mod testkit;
+pub mod xml;
 
 pub struct Terminator {
     signal: Promise<()>,

src/util/xml.rs

@@ -15,7 +15,7 @@ macro_rules! fail_fast {
     ($errorable: expr) => {
         match $errorable {
             Ok(i) => i,
-            Err(e) => return Continuation::Final(Err(e.into()))
+            Err(e) => return Continuation::Final(Err(e.into())),
         }
     };
 }