1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
use std::cmp::{Ordering, Ord};
use std::ops::{Add, Sub};
use errors::EventError;
use chrono;
use chrono::{TimeZone, Duration, Datelike, Local, Weekday};
use chrono::offset::Utc;
use chrono_tz::{Tz, UTC};
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub enum Date {
Time(chrono::DateTime<Tz>),
AllDay(chrono::Date<Tz>),
}
impl Date {
pub fn new() -> Date {
Date::Time(UTC.timestamp(0, 0))
}
pub fn now() -> Date {
Date::Time(UTC.from_utc_datetime(&Utc::now().naive_utc()))
}
pub fn parse(date_str: &str, time_zone: &str) -> Result<Self, EventError> {
let absolute_time = date_str.chars().rev().next().unwrap() == 'Z';
let tz: Tz = if absolute_time {
UTC
} else {
// FIXME: this should not be UTC but local timezone
time_zone.parse().unwrap_or(UTC)
};
let date = match date_str.find("T") {
Some(_) => {
let date_pattern = if absolute_time {
"%Y%m%dT%H%M%SZ"
} else {
"%Y%m%dT%H%M%S"
};
let time = tz.datetime_from_str(&date_str, date_pattern).unwrap_or(
UTC.timestamp(
0,
0,
),
);
Date::Time(time)
}
None => {
Date::AllDay(tz.ymd(
date_str[0..4].parse()?,
date_str[4..6].parse()?,
date_str[6..8].parse()?,
))
}
};
Ok(date)
}
pub fn format(&self, fmt: &str) -> String {
match *self {
Date::Time(t) => t.with_timezone(&Local).format(fmt).to_string(),
Date::AllDay(d) => d.format(fmt).to_string(),
}
}
pub fn same_day(&self, other: &Date) -> bool {
self.day() == other.day() && self.month() == other.month() && self.year() == self.year()
}
pub fn day(&self) -> u32 {
match *self {
Date::Time(t) => t.day(),
Date::AllDay(d) => d.day(),
}
}
pub fn with_day(&self, day: u32) -> Option<Date> {
Some(match *self {
Date::Time(t) => Date::Time(t.with_day(day)?),
Date::AllDay(d) => Date::AllDay(d.with_day(day)?),
})
}
pub fn weekday(&self) -> Weekday {
match *self {
Date::Time(t) => t.weekday(),
Date::AllDay(d) => d.weekday(),
}
}
pub fn month(&self) -> u32 {
match *self {
Date::Time(t) => t.month(),
Date::AllDay(d) => d.month(),
}
}
pub fn with_month(&self, month: u32) -> Option<Date> {
Some(match *self {
Date::Time(t) => Date::Time(t.with_month(month)?),
Date::AllDay(d) => Date::AllDay(d.with_month(month)?),
})
}
pub fn week_of_month(&self) -> (i32, i32) {
let week = ((self.day() - 1) / 7 + 1) as i32;
let neg_week = ((self.days_in_month() - self.day()) / 7 + 1) as i32;
(week, -neg_week)
}
pub fn year(&self) -> i32 {
match *self {
Date::Time(t) => t.year(),
Date::AllDay(d) => d.year(),
}
}
pub fn with_year(&self, year: i32) -> Option<Date> {
Some(match *self {
Date::Time(t) => Date::Time(t.with_year(year)?),
Date::AllDay(d) => Date::AllDay(d.with_year(year)?),
})
}
pub fn days_in_month(&self) -> u32 {
chrono::NaiveDate::from_ymd_opt(self.year(), self.month() + 1, 1)
.unwrap_or(chrono::NaiveDate::from_ymd(self.year() + 1, 1, 1))
.pred()
.day()
}
}
impl Ord for Date {
fn cmp(&self, other: &Self) -> Ordering {
match *self {
Date::Time(t1) => {
match *other {
Date::Time(t2) => t1.cmp(&t2),
Date::AllDay(d) => cmp_date_time(&d, &t1).reverse(),
}
}
Date::AllDay(d1) => {
match *other {
Date::Time(t) => cmp_date_time(&d1, &t),
Date::AllDay(d2) => d1.cmp(&d2),
}
}
}
}
}
impl PartialOrd for Date {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Add<Duration> for Date {
type Output = Date;
fn add(self, other: Duration) -> Date {
match self {
Date::Time(d) => Date::Time(d + other),
Date::AllDay(d) => Date::AllDay(d + other),
}
}
}
impl Sub<Date> for Date {
type Output = Duration;
fn sub(self, other: Self) -> Duration {
match self {
Date::Time(t1) => {
match other {
Date::Time(t2) => t1 - t2,
Date::AllDay(d) => t1.date() - d,
}
}
Date::AllDay(d1) => {
match other {
Date::Time(t) => d1 - t.date(),
Date::AllDay(d2) => d1 - d2,
}
}
}
}
}
fn cmp_date_time<T: TimeZone>(date: &chrono::Date<T>, time: &chrono::DateTime<T>) -> Ordering {
let d2 = time.date();
if date.eq(&d2) {
return Ordering::Less;
}
date.cmp(&d2)
}
#[cfg(test)]
mod tests {
use super::Date;
use chrono::Datelike;
use chrono::Timelike;
#[test]
fn date_parse_time() {
match Date::parse("19361020T120000", "").unwrap() {
Date::Time(time) => {
assert_eq!(time.year(), 1936);
assert_eq!(time.hour(), 12);
assert_eq!(time.day(), 20);
}
_ => assert!(true),
}
}
#[test]
fn date_parse_allday() {
match Date::parse("19361020", "").unwrap() {
Date::AllDay(time) => {
assert_eq!(time.year(), 1936);
assert_eq!(time.month(), 10);
assert_eq!(time.day(), 20);
}
_ => assert!(true),
}
}
#[test]
fn date_ord() {
let d1 = Date::parse("19361020", "").unwrap();
let d2 = Date::parse("19361022", "").unwrap();
let t1 = Date::parse("19361020T120000", "").unwrap();
let t2 = Date::parse("19361018T120000", "").unwrap();
if d1 > d2 {
assert!(true)
}
if d1 != d1 {
assert!(true)
}
if t2 > d1 {
assert!(true)
}
if t1 < t2 {
assert!(true)
}
if t1 > d2 {
assert!(true)
}
}
}
|
