feat(xmpp): iq body ADT with parsing

Cargo.lock

@@ -95,6 +95,12 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "convert_case"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6245d59a3e82a7fc217c5828a6692dbc6dfb63a0c8c90495621f7b9d79704a0e"
+
 [[package]]
 name = "cpufeatures"
 version = "0.2.5"
@@ -114,6 +120,19 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "derive_more"
+version = "0.99.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fb810d30a7c1953f91334de7244731fc3f3c10d7fe163338a35b9f640960321"
+dependencies = [
+ "convert_case",
+ "proc-macro2",
+ "quote",
+ "rustc_version",
+ "syn",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.6"
@@ -425,6 +444,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "assert_matches",
+ "derive_more",
  "figment",
  "futures-util",
  "http-body-util",
@@ -776,6 +796,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "rustc_version"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
+dependencies = [
+ "semver",
+]
+
 [[package]]
 name = "rustls"
 version = "0.20.8"
@@ -819,6 +848,12 @@ dependencies = [
  "untrusted",
 ]
 
+[[package]]
+name = "semver"
+version = "1.0.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58bc9567378fc7690d6b2addae4e60ac2eeea07becb2c64b9f218b53865cba2a"
+
 [[package]]
 name = "serde"
 version = "1.0.152"

Cargo.toml

@@ -21,6 +21,7 @@ nom = "7.1.3"
 tokio-rustls = "0.23.4"
 rustls-pemfile = "1.0.2"
 quick-xml = { version = "0.27.1", features = ["async-tokio"] }
+derive_more = "0.99.17"
 
 [dev-dependencies]
 assert_matches = "1.5.0"

src/projections/xmpp/mod.rs

@@ -1,3 +1,5 @@
+mod proto;
+
 use std::collections::HashMap;
 use std::fs::File;
 use std::io::BufReader as SyncBufReader;

src/projections/xmpp/proto.rs

@@ -0,0 +1,71 @@
+use derive_more::From;
+use quick_xml::events::Event;
+use quick_xml::name::{Namespace, ResolveResult};
+
+use crate::protos::xmpp::bind::BindRequest;
+use crate::util::xml::{Continuation, FromXml, Parser};
+
+use crate::prelude::*;
+
+#[derive(PartialEq, Eq, Debug, From)]
+pub enum IqClientBody {
+    Bind(BindRequest),
+}
+
+#[derive(From)]
+pub struct IqClientBodyParser(IqClientBodyParserInner);
+
+#[derive(From)]
+enum IqClientBodyParserInner {
+    Initial,
+    Bind(<BindRequest as FromXml>::P),
+}
+
+impl FromXml for IqClientBody {
+    type P = IqClientBodyParser;
+
+    fn parse() -> Self::P {
+        IqClientBodyParserInner::Initial.into()
+    }
+}
+
+impl Parser for IqClientBodyParser {
+    type Output = Result<IqClientBody>;
+
+    fn consume<'a>(
+        self: Self,
+        namespace: quick_xml::name::ResolveResult,
+        event: &quick_xml::events::Event<'a>,
+    ) -> crate::util::xml::Continuation<Self, Self::Output> {
+        use IqClientBodyParserInner::*;
+        match self.0 {
+            Initial => {
+                let Event::Start(bytes) = event else {
+                    return Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}")));
+                };
+                if bytes.name().0 == BindRequest::NAME.as_bytes()
+                    && namespace == ResolveResult::Bound(Namespace(BindRequest::NS.as_bytes()))
+                {
+                    match BindRequest::parse().consume(namespace, event) {
+                        Continuation::Final(Ok(r)) => Continuation::Final(Ok(r.into())),
+                        Continuation::Final(Err(e)) => Continuation::Final(Err(e)),
+                        Continuation::Continue(s) => {
+                            let inner: IqClientBodyParserInner = s.into();
+                            Continuation::Continue(inner.into())
+                        }
+                    }
+                } else {
+                    Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}")))
+                }
+            }
+            Bind(p) => match p.consume(namespace, event) {
+                Continuation::Final(Ok(r)) => Continuation::Final(Ok(r.into())),
+                Continuation::Final(Err(e)) => Continuation::Final(Err(e)),
+                Continuation::Continue(s) => {
+                    let inner: IqClientBodyParserInner = s.into();
+                    Continuation::Continue(inner.into())
+                }
+            },
+        }
+    }
+}

src/protos/xmpp/bind.rs

@@ -47,6 +47,11 @@ enum BindRequestParserInner {
     InBindResourceEnd(String),
 }
 
+impl BindRequest {
+    pub const NS: &'static str = XMLNS;
+    pub const NAME: &'static str = "bind";
+}
+
 impl FromXml for BindRequest {
     type P = BindRequestParser;
 
@@ -70,7 +75,7 @@ impl Parser for BindRequestParser {
                 let Event::Start(bytes) = event else {
                     return Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}")));
                 };
-                if bytes.name().0 != b"bind" {
+                if bytes.name().0 != BindRequest::NAME.as_bytes() {
                     return Continuation::Final(Err(ffail!(
                         "Unexpected XML tag: {:?}",
                         bytes.name()