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 alloc::borrow::Cow;
8
9use xso::{AsXml, FromXml};
10
11use crate::date::Xep0082;
12use crate::iq::{IqGetPayload, IqResultPayload};
13use crate::ns;
14use chrono::{DateTime, FixedOffset, Utc};
15use core::str::FromStr;
16use xso::{error::Error, text::TextCodec};
17
18struct ColonSeparatedOffset;
19
20impl TextCodec<FixedOffset> for ColonSeparatedOffset {
21    fn decode(&self, s: String) -> Result<FixedOffset, Error> {
22        FixedOffset::from_str(&s).map_err(Error::text_parse_error)
23    }
24
25    fn encode<'x>(&self, value: &'x FixedOffset) -> Result<Option<Cow<'x, str>>, Error> {
26        let offset = value.local_minus_utc();
27        let nminutes = offset / 60;
28        let nseconds = offset % 60;
29        let nhours = nminutes / 60;
30        let nminutes = nminutes % 60;
31        if nseconds == 0 {
32            Ok(Some(Cow::Owned(format!("{:+03}:{:02}", nhours, nminutes))))
33        } else {
34            Ok(Some(Cow::Owned(format!(
35                "{:+03}:{:02}:{:02}",
36                nhours, nminutes, nseconds
37            ))))
38        }
39    }
40}
41
42/// An entity time query.
43#[derive(FromXml, AsXml, PartialEq, Debug, Clone)]
44#[xml(namespace = ns::TIME, name = "time")]
45pub struct TimeQuery;
46
47impl IqGetPayload for TimeQuery {}
48
49/// An entity time result, containing an unique DateTime.
50#[derive(Debug, Clone, Copy, FromXml, AsXml)]
51#[xml(namespace = ns::TIME, name = "time")]
52pub struct TimeResult {
53    /// The UTC offset
54    #[xml(extract(name = "tzo", fields(text(codec = ColonSeparatedOffset))))]
55    pub tz_offset: FixedOffset,
56
57    /// The UTC timestamp
58    #[xml(extract(name = "utc", fields(text(codec = Xep0082))))]
59    pub utc: DateTime<Utc>,
60}
61
62impl IqResultPayload for TimeResult {}
63
64impl From<TimeResult> for DateTime<FixedOffset> {
65    fn from(time: TimeResult) -> Self {
66        time.utc.with_timezone(&time.tz_offset)
67    }
68}
69
70impl From<TimeResult> for DateTime<Utc> {
71    fn from(time: TimeResult) -> Self {
72        time.utc
73    }
74}
75
76impl From<DateTime<FixedOffset>> for TimeResult {
77    fn from(dt: DateTime<FixedOffset>) -> Self {
78        let tz_offset = *dt.offset();
79        let utc = dt.with_timezone(&Utc);
80        TimeResult { tz_offset, utc }
81    }
82}
83
84impl From<DateTime<Utc>> for TimeResult {
85    fn from(dt: DateTime<Utc>) -> Self {
86        TimeResult {
87            tz_offset: FixedOffset::east_opt(0).unwrap(),
88            utc: dt,
89        }
90    }
91}
92
93#[cfg(test)]
94mod tests {
95    use super::*;
96
97    use minidom::Element;
98
99    // DateTime’s size doesn’t depend on the architecture.
100    #[test]
101    fn test_size() {
102        assert_size!(TimeQuery, 0);
103        assert_size!(TimeResult, 16);
104    }
105
106    #[test]
107    fn parse_response() {
108        let elem: Element =
109            "<time xmlns='urn:xmpp:time'><tzo>-06:00</tzo><utc>2006-12-19T17:58:35Z</utc></time>"
110                .parse()
111                .unwrap();
112        let elem1 = elem.clone();
113        let time = TimeResult::try_from(elem).unwrap();
114        let dt = DateTime::<FixedOffset>::from(time);
115        assert_eq!(dt.timezone(), FixedOffset::west_opt(6 * 3600).unwrap());
116        assert_eq!(
117            dt,
118            DateTime::<FixedOffset>::from_str("2006-12-19T12:58:35-05:00").unwrap()
119        );
120        let elem2 = Element::from(time);
121        assert_eq!(elem1, elem2);
122    }
123}
xmpp_parsers/time.rs

xmpp_parsers/
time.rs
