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use std::fmt::Display;
use jid::JID;
use peanuts::element::{ElementBuilder, FromElement, IntoElement};
use peanuts::Element;
use thiserror::Error;
use crate::bind;
use super::client;
use super::sasl::{self, Mechanisms};
use super::starttls::{self, StartTls};
use super::stream_error::{Error as StreamError, Text};
pub const XMLNS: &str = "http://etherx.jabber.org/streams";
// MUST be qualified by stream namespace
// #[derive(XmlSerialize, XmlDeserialize)]
// #[peanuts(xmlns = XMLNS)]
#[derive(Debug)]
pub struct Stream {
pub from: Option<JID>,
to: Option<JID>,
id: Option<String>,
version: Option<String>,
// TODO: lang enum
lang: Option<String>,
// #[peanuts(content)]
// content: Message,
}
impl FromElement for Stream {
fn from_element(mut element: Element) -> std::result::Result<Self, peanuts::DeserializeError> {
element.check_namespace(XMLNS)?;
element.check_name("stream")?;
let from = element.attribute_opt("from")?;
let to = element.attribute_opt("to")?;
let id = element.attribute_opt("id")?;
let version = element.attribute_opt("version")?;
let lang = element.attribute_opt_namespaced("lang", peanuts::XML_NS)?;
Ok(Stream {
from,
to,
id,
version,
lang,
})
}
}
impl IntoElement for Stream {
fn builder(&self) -> ElementBuilder {
Element::builder("stream", Some(XMLNS.to_string()))
.push_namespace_declaration_override(Some("stream"), XMLNS)
.push_namespace_declaration_override(None::<&str>, client::XMLNS)
.push_attribute_opt("to", self.to.clone())
.push_attribute_opt("from", self.from.clone())
.push_attribute_opt("id", self.id.clone())
.push_attribute_opt("version", self.version.clone())
.push_attribute_opt_namespaced(peanuts::XML_NS, "to", self.lang.clone())
}
}
impl<'s> Stream {
pub fn new(
from: Option<JID>,
to: Option<JID>,
id: Option<String>,
version: Option<String>,
lang: Option<String>,
) -> Self {
Self {
from,
to,
id,
version,
lang,
}
}
/// For initial stream headers, the initiating entity SHOULD include the 'xml:lang' attribute.
/// For privacy, it is better to not set `from` when sending a client stanza over an unencrypted connection.
pub fn new_client(from: Option<JID>, to: JID, id: Option<String>, lang: String) -> Self {
Self {
from,
to: Some(to),
id,
version: Some("1.0".to_string()),
lang: Some(lang),
}
}
}
#[derive(Debug)]
pub struct Features {
pub features: Vec<Feature>,
}
impl Features {
pub fn negotiate(self) -> Option<Feature> {
if let Some(Feature::StartTls(s)) = self
.features
.iter()
.find(|feature| matches!(feature, Feature::StartTls(_s)))
{
// TODO: avoid clone
return Some(Feature::StartTls(s.clone()));
} else if let Some(Feature::Sasl(mechanisms)) = self
.features
.iter()
.find(|feature| matches!(feature, Feature::Sasl(_)))
{
// TODO: avoid clone
return Some(Feature::Sasl(mechanisms.clone()));
} else if let Some(Feature::Bind) = self
.features
.into_iter()
.find(|feature| matches!(feature, Feature::Bind))
{
Some(Feature::Bind)
} else {
return None;
}
}
}
impl IntoElement for Features {
fn builder(&self) -> ElementBuilder {
Element::builder("features", Some(XMLNS)).push_children(self.features.clone())
}
}
impl FromElement for Features {
fn from_element(
mut element: Element,
) -> std::result::Result<Features, peanuts::DeserializeError> {
element.check_namespace(XMLNS)?;
element.check_name("features")?;
let features = element.children()?;
Ok(Features { features })
}
}
#[derive(Debug, Clone)]
pub enum Feature {
StartTls(StartTls),
Sasl(Mechanisms),
Bind,
Unknown,
}
impl IntoElement for Feature {
fn builder(&self) -> ElementBuilder {
match self {
Feature::StartTls(start_tls) => start_tls.builder(),
Feature::Sasl(mechanisms) => mechanisms.builder(),
Feature::Bind => todo!(),
Feature::Unknown => todo!(),
}
}
}
impl FromElement for Feature {
fn from_element(element: Element) -> peanuts::element::DeserializeResult<Self> {
match element.identify() {
(Some(starttls::XMLNS), "starttls") => {
Ok(Feature::StartTls(StartTls::from_element(element)?))
}
(Some(sasl::XMLNS), "mechanisms") => {
Ok(Feature::Sasl(Mechanisms::from_element(element)?))
}
(Some(bind::XMLNS), "bind") => Ok(Feature::Bind),
_ => Ok(Feature::Unknown),
}
}
}
#[derive(Error, Debug, Clone)]
pub struct Error {
pub error: StreamError,
pub text: Option<Text>,
}
impl Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.error)?;
if let Some(text) = &self.text {
if let Some(text) = &text.text {
write!(f, ": {}", text)?;
}
}
Ok(())
}
}
impl FromElement for Error {
fn from_element(mut element: Element) -> peanuts::element::DeserializeResult<Self> {
element.check_name("error")?;
element.check_namespace(XMLNS)?;
let error = element.pop_child_one()?;
let text = element.pop_child_opt()?;
Ok(Error { error, text })
}
}
impl IntoElement for Error {
fn builder(&self) -> ElementBuilder {
Element::builder("error", Some(XMLNS))
.push_child(self.error.clone())
.push_child_opt(self.text.clone())
}
}
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