487dbdc6de
This allows Element::from() to work, and since Into<Element> is automatically implemented for any type implementing From there is no change to existing code.
86 lines
2.6 KiB
Rust
86 lines
2.6 KiB
Rust
// Copyright (c) 2017 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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use try_from::TryFrom;
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use minidom::Element;
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use error::Error;
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use ns;
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#[derive(Debug, Clone)]
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pub enum Receipt {
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Request,
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Received(Option<String>),
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}
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impl TryFrom<Element> for Receipt {
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type Err = Error;
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fn try_from(elem: Element) -> Result<Receipt, Error> {
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for _ in elem.children() {
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return Err(Error::ParseError("Unknown child in receipt element."));
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}
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if elem.is("request", ns::RECEIPTS) {
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for _ in elem.attrs() {
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return Err(Error::ParseError("Unknown attribute in request element."));
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}
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Ok(Receipt::Request)
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} else if elem.is("received", ns::RECEIPTS) {
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for (attr, _) in elem.attrs() {
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if attr != "id" {
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return Err(Error::ParseError("Unknown attribute in received element."));
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}
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}
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let id = get_attr!(elem, "id", optional);
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Ok(Receipt::Received(id))
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} else {
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Err(Error::ParseError("This is not a receipt element."))
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}
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}
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}
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impl From<Receipt> for Element {
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fn from(receipt: Receipt) -> Element {
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match receipt {
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Receipt::Request => Element::builder("request")
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.ns(ns::RECEIPTS),
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Receipt::Received(id) => Element::builder("received")
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.ns(ns::RECEIPTS)
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.attr("id", id),
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}.build()
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_simple() {
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let elem: Element = "<request xmlns='urn:xmpp:receipts'/>".parse().unwrap();
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Receipt::try_from(elem).unwrap();
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let elem: Element = "<received xmlns='urn:xmpp:receipts'/>".parse().unwrap();
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Receipt::try_from(elem).unwrap();
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let elem: Element = "<received xmlns='urn:xmpp:receipts' id='coucou'/>".parse().unwrap();
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Receipt::try_from(elem).unwrap();
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}
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#[test]
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fn test_serialise() {
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let receipt = Receipt::Request;
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let elem: Element = receipt.into();
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assert!(elem.is("request", ns::RECEIPTS));
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let receipt = Receipt::Received(Some(String::from("coucou")));
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let elem: Element = receipt.into();
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assert!(elem.is("received", ns::RECEIPTS));
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assert_eq!(elem.attr("id"), Some("coucou"));
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}
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}
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