xmpp_parsers/
time.rs

1// Copyright (c) 2019 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
2//
3// This Source Code Form is subject to the terms of the Mozilla Public
4// License, v. 2.0. If a copy of the MPL was not distributed with this
5// file, You can obtain one at http://mozilla.org/MPL/2.0/.
6
7use xso::{AsXml, FromXml};
8
9use crate::date::DateTime;
10use crate::iq::{IqGetPayload, IqResultPayload};
11use crate::ns;
12use chrono::FixedOffset;
13use core::str::FromStr;
14use minidom::Element;
15use xso::error::{Error, FromElementError};
16
17/// An entity time query.
18#[derive(FromXml, AsXml, PartialEq, Debug, Clone)]
19#[xml(namespace = ns::TIME, name = "time")]
20pub struct TimeQuery;
21
22impl IqGetPayload for TimeQuery {}
23
24/// An entity time result, containing an unique DateTime.
25#[derive(Debug, Clone)]
26pub struct TimeResult(pub DateTime);
27
28impl IqResultPayload for TimeResult {}
29
30impl TryFrom<Element> for TimeResult {
31    type Error = FromElementError;
32
33    fn try_from(elem: Element) -> Result<TimeResult, FromElementError> {
34        check_self!(elem, "time", TIME);
35        check_no_attributes!(elem, "time");
36
37        let mut tzo = None;
38        let mut utc = None;
39
40        for child in elem.children() {
41            if child.is("tzo", ns::TIME) {
42                if tzo.is_some() {
43                    return Err(Error::Other("More than one tzo element in time.").into());
44                }
45                check_no_children!(child, "tzo");
46                check_no_attributes!(child, "tzo");
47                // TODO: Add a FromStr implementation to FixedOffset to avoid this hack.
48                let fake_date = format!("{}{}", "2019-04-22T11:38:00", child.text());
49                let date_time = DateTime::from_str(&fake_date).map_err(Error::text_parse_error)?;
50                tzo = Some(date_time.timezone());
51            } else if child.is("utc", ns::TIME) {
52                if utc.is_some() {
53                    return Err(Error::Other("More than one utc element in time.").into());
54                }
55                check_no_children!(child, "utc");
56                check_no_attributes!(child, "utc");
57                let date_time =
58                    DateTime::from_str(&child.text()).map_err(Error::text_parse_error)?;
59                match FixedOffset::east_opt(0) {
60                    Some(tz) if date_time.timezone() == tz => (),
61                    _ => return Err(Error::Other("Non-UTC timezone for utc element.").into()),
62                }
63                utc = Some(date_time);
64            } else {
65                return Err(Error::Other("Unknown child in time element.").into());
66            }
67        }
68
69        let tzo = tzo.ok_or(Error::Other("Missing tzo child in time element."))?;
70        let utc = utc.ok_or(Error::Other("Missing utc child in time element."))?;
71        let date = utc.with_timezone(tzo);
72
73        Ok(TimeResult(date))
74    }
75}
76
77impl From<TimeResult> for Element {
78    fn from(time: TimeResult) -> Element {
79        Element::builder("time", ns::TIME)
80            .append(Element::builder("tzo", ns::TIME).append(format!("{}", time.0.timezone())))
81            .append(
82                Element::builder("utc", ns::TIME).append(
83                    time.0
84                        .with_timezone(FixedOffset::east_opt(0).unwrap())
85                        .format("%FT%TZ"),
86                ),
87            )
88            .build()
89    }
90}
91
92#[cfg(test)]
93mod tests {
94    use super::*;
95
96    // DateTime’s size doesn’t depend on the architecture.
97    #[test]
98    fn test_size() {
99        assert_size!(TimeQuery, 0);
100        assert_size!(TimeResult, 16);
101    }
102
103    #[test]
104    fn parse_response() {
105        let elem: Element =
106            "<time xmlns='urn:xmpp:time'><tzo>-06:00</tzo><utc>2006-12-19T17:58:35Z</utc></time>"
107                .parse()
108                .unwrap();
109        let elem1 = elem.clone();
110        let time = TimeResult::try_from(elem).unwrap();
111        assert_eq!(time.0.timezone(), FixedOffset::west_opt(6 * 3600).unwrap());
112        assert_eq!(
113            time.0,
114            DateTime::from_str("2006-12-19T12:58:35-05:00").unwrap()
115        );
116        let elem2 = Element::from(time);
117        assert_eq!(elem1, elem2);
118    }
119}
xmpp_parsers/time.rs

xmpp_parsers/
time.rs
