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use crate::util::error::Error;
use crate::jingle::SessionId;
use crate::ns;
use minidom::Element;
use std::convert::TryFrom;
#[derive(Debug, Clone)]
pub enum JingleMI {
Propose {
sid: SessionId,
description: Element,
},
Retract(SessionId),
Accept(SessionId),
Proceed(SessionId),
Reject(SessionId),
}
fn get_sid(elem: Element) -> Result<SessionId, Error> {
check_no_unknown_attributes!(elem, "Jingle message", ["id"]);
Ok(SessionId(get_attr!(elem, "id", Required)))
}
fn check_empty_and_get_sid(elem: Element) -> Result<SessionId, Error> {
check_no_children!(elem, "Jingle message");
get_sid(elem)
}
impl TryFrom<Element> for JingleMI {
type Error = Error;
fn try_from(elem: Element) -> Result<JingleMI, Error> {
if !elem.has_ns(ns::JINGLE_MESSAGE) {
return Err(Error::ParseError("This is not a Jingle message element."));
}
Ok(match elem.name() {
"propose" => {
let mut description = None;
for child in elem.children() {
if child.name() != "description" {
return Err(Error::ParseError("Unknown child in propose element."));
}
if description.is_some() {
return Err(Error::ParseError("Too many children in propose element."));
}
description = Some(child.clone());
}
JingleMI::Propose {
sid: get_sid(elem)?,
description: description.ok_or(Error::ParseError(
"Propose element doesn’t contain a description.",
))?,
}
}
"retract" => JingleMI::Retract(check_empty_and_get_sid(elem)?),
"accept" => JingleMI::Accept(check_empty_and_get_sid(elem)?),
"proceed" => JingleMI::Proceed(check_empty_and_get_sid(elem)?),
"reject" => JingleMI::Reject(check_empty_and_get_sid(elem)?),
_ => return Err(Error::ParseError("This is not a Jingle message element.")),
})
}
}
impl From<JingleMI> for Element {
fn from(jingle_mi: JingleMI) -> Element {
match jingle_mi {
JingleMI::Propose { sid, description } => Element::builder("propose")
.ns(ns::JINGLE_MESSAGE)
.attr("id", sid)
.append(description),
JingleMI::Retract(sid) => Element::builder("retract")
.ns(ns::JINGLE_MESSAGE)
.attr("id", sid),
JingleMI::Accept(sid) => Element::builder("accept")
.ns(ns::JINGLE_MESSAGE)
.attr("id", sid),
JingleMI::Proceed(sid) => Element::builder("proceed")
.ns(ns::JINGLE_MESSAGE)
.attr("id", sid),
JingleMI::Reject(sid) => Element::builder("reject")
.ns(ns::JINGLE_MESSAGE)
.attr("id", sid),
}
.build()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[cfg(target_pointer_width = "32")]
#[test]
fn test_size() {
assert_size!(JingleMI, 68);
}
#[cfg(target_pointer_width = "64")]
#[test]
fn test_size() {
assert_size!(JingleMI, 136);
}
#[test]
fn test_simple() {
let elem: Element = "<accept xmlns='urn:xmpp:jingle-message:0' id='coucou'/>"
.parse()
.unwrap();
JingleMI::try_from(elem).unwrap();
}
#[test]
fn test_invalid_child() {
let elem: Element =
"<propose xmlns='urn:xmpp:jingle-message:0' id='coucou'><coucou/></propose>"
.parse()
.unwrap();
let error = JingleMI::try_from(elem).unwrap_err();
let message = match error {
Error::ParseError(string) => string,
_ => panic!(),
};
assert_eq!(message, "Unknown child in propose element.");
}
}