From e6c97ab82880ad4cd12b05bc1c8f2a0a3413735c Mon Sep 17 00:00:00 2001
From: cel 🌸 <cel@bunny.garden>
Date: Sun, 12 Jan 2025 21:19:07 +0000
Subject: implement stream splitting and closing

---
 jabber/src/jabber_stream.rs | 118 +++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 110 insertions(+), 8 deletions(-)

(limited to 'jabber/src/jabber_stream.rs')

diff --git a/jabber/src/jabber_stream.rs b/jabber/src/jabber_stream.rs
index 89890a8..384e6e4 100644
--- a/jabber/src/jabber_stream.rs
+++ b/jabber/src/jabber_stream.rs
@@ -26,8 +26,103 @@ pub mod bound_stream;
 
 // open stream (streams started)
 pub struct JabberStream<S> {
-    reader: Reader<ReadHalf<S>>,
-    pub(crate) writer: Writer<WriteHalf<S>>,
+    reader: JabberReader<S>,
+    writer: JabberWriter<S>,
+}
+
+impl<S> JabberStream<S> {
+    fn split(self) -> (JabberReader<S>, JabberWriter<S>) {
+        let reader = self.reader;
+        let writer = self.writer;
+        (reader, writer)
+    }
+}
+
+pub struct JabberReader<S>(Reader<ReadHalf<S>>);
+
+impl<S> JabberReader<S> {
+    // TODO: consider taking a readhalf and creating peanuts::Reader here, only one inner
+    fn new(reader: Reader<ReadHalf<S>>) -> Self {
+        Self(reader)
+    }
+
+    fn unsplit(self, writer: JabberWriter<S>) -> JabberStream<S> {
+        JabberStream {
+            reader: self,
+            writer,
+        }
+    }
+
+    fn into_inner(self) -> Reader<ReadHalf<S>> {
+        self.0
+    }
+}
+
+impl<S> JabberReader<S>
+where
+    S: AsyncRead + Unpin,
+{
+    pub async fn try_close(&mut self) -> Result<()> {
+        self.read_end_tag().await?;
+        Ok(())
+    }
+}
+
+impl<S> std::ops::Deref for JabberReader<S> {
+    type Target = Reader<ReadHalf<S>>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<S> std::ops::DerefMut for JabberReader<S> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+pub struct JabberWriter<S>(Writer<WriteHalf<S>>);
+
+impl<S> JabberWriter<S> {
+    fn new(writer: Writer<WriteHalf<S>>) -> Self {
+        Self(writer)
+    }
+
+    fn unsplit(self, reader: JabberReader<S>) -> JabberStream<S> {
+        JabberStream {
+            reader,
+            writer: self,
+        }
+    }
+
+    fn into_inner(self) -> Writer<WriteHalf<S>> {
+        self.0
+    }
+}
+
+impl<S> JabberWriter<S>
+where
+    S: AsyncWrite + Unpin + Send,
+{
+    pub async fn try_close(&mut self) -> Result<()> {
+        self.write_end().await?;
+        Ok(())
+    }
+}
+
+impl<S> std::ops::Deref for JabberWriter<S> {
+    type Target = Writer<WriteHalf<S>>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<S> std::ops::DerefMut for JabberWriter<S> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
 }
 
 impl<S> JabberStream<S>
@@ -119,8 +214,8 @@ where
                 }
             }
         }
-        let writer = self.writer.into_inner();
-        let reader = self.reader.into_inner();
+        let writer = self.writer.into_inner().into_inner();
+        let reader = self.reader.into_inner().into_inner();
         let stream = reader.unsplit(writer);
         Ok(stream)
     }
@@ -223,8 +318,8 @@ where
     pub async fn start_stream(connection: S, server: &mut String) -> Result<Self> {
         // client to server
         let (reader, writer) = tokio::io::split(connection);
-        let mut reader = Reader::new(reader);
-        let mut writer = Writer::new(writer);
+        let mut reader = JabberReader::new(Reader::new(reader));
+        let mut writer = JabberWriter::new(Writer::new(writer));
 
         // declaration
         writer.write_declaration(XML_VERSION).await?;
@@ -262,7 +357,10 @@ where
     }
 
     pub fn into_inner(self) -> S {
-        self.reader.into_inner().unsplit(self.writer.into_inner())
+        self.reader
+            .into_inner()
+            .into_inner()
+            .unsplit(self.writer.into_inner().into_inner())
     }
 
     pub async fn send_stanza(&mut self, stanza: &Stanza) -> Result<()> {
@@ -280,7 +378,11 @@ impl JabberStream<Unencrypted> {
         let proceed: Proceed = self.reader.read().await?;
         debug!("got proceed: {:?}", proceed);
         let connector = TlsConnector::new().unwrap();
-        let stream = self.reader.into_inner().unsplit(self.writer.into_inner());
+        let stream = self
+            .reader
+            .into_inner()
+            .into_inner()
+            .unsplit(self.writer.into_inner().into_inner());
         if let Ok(tls_stream) = tokio_native_tls::TlsConnector::from(connector)
             .connect(domain.as_ref(), stream)
             .await
-- 
cgit