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

use super::{Hour, Hour24};
use crate::{Chinese, ChineseFormat, Variant};
use lazy_static::lazy_static;
use std::collections::HashMap;

/// Each of the 8 traditional parts of the day-night cycle.
///
/// This partitioning scheme is mainly used in 12-hour formats,
/// just like the a.m./p.m. in English, but more fine-grained.
///
/// Each day part conventionally lasts 3 hours,
/// starting from `早上` at 5.
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum DayPart {
    EarlyMorning,
    Morning,
    Midday,
    Afternoon,
    EarlyEvening,
    Evening,
    Midnight,
    LateNight,
}

/// Even though [DayPart] is essentially designed
/// for 12-hour time formats, it can be infallibly obtained
/// only by converting an [Hour24],
/// because the day/night information is required.
///
/// ```
/// use chinese_format::{*, gregorian::*};
///
/// # fn main() -> GenericResult<()> {
/// let hour: Hour24 = 21.try_into()?;
/// let day_part: DayPart = hour.into();
///
/// assert_eq!(day_part.to_chinese(Variant::Simplified), "晚上");
/// assert_eq!(day_part.to_chinese(Variant::Traditional), "晚上");
///
/// # Ok(())
/// # }
/// ```
impl From<Hour24> for DayPart {
    fn from(hour24: Hour24) -> Self {
        PART_OF_DAY_BY_HOUR[&(hour24.clock_value().0 as u8)]
    }
}

/// Each day part can be converted to Chinese logograms,
/// which are independent of the [Variant].
///
/// ```
/// use chinese_format::{*, gregorian::*};
///
/// assert_eq!(
///     DayPart::EarlyMorning.to_chinese(Variant::Simplified),
///     "早上"
/// );
/// assert_eq!(
///     DayPart::EarlyMorning.to_chinese(Variant::Traditional),
///     "早上"
/// );
///
/// assert_eq!(
///     DayPart::Morning.to_chinese(Variant::Simplified),
///     "上午"
/// );
/// assert_eq!(
///     DayPart::Morning.to_chinese(Variant::Traditional),
///     "上午"
/// );
///
/// assert_eq!(
///     DayPart::Midday.to_chinese(Variant::Simplified),
///     "中午"
/// );
/// assert_eq!(
///     DayPart::Midday.to_chinese(Variant::Traditional),
///     "中午"
/// );
///
/// assert_eq!(
///     DayPart::Afternoon.to_chinese(Variant::Simplified),
///     "下午"
/// );
/// assert_eq!(
///     DayPart::Afternoon.to_chinese(Variant::Traditional),
///     "下午"
/// );
///
/// assert_eq!(
///     DayPart::EarlyEvening.to_chinese(Variant::Simplified),
///     "傍晚"
/// );
/// assert_eq!(
///     DayPart::EarlyEvening.to_chinese(Variant::Traditional),
///     "傍晚"
/// );
///
/// assert_eq!(
///     DayPart::Evening.to_chinese(Variant::Simplified),
///     "晚上"
/// );
/// assert_eq!(
///     DayPart::Evening.to_chinese(Variant::Traditional),
///     "晚上"
/// );
///
/// assert_eq!(
///     DayPart::Midnight.to_chinese(Variant::Simplified),
///     "午夜"
/// );
/// assert_eq!(
///     DayPart::Midnight.to_chinese(Variant::Traditional),
///     "午夜"
/// );
///
/// assert_eq!(
///     DayPart::LateNight.to_chinese(Variant::Simplified),
///     "深夜"
/// );
/// assert_eq!(
///     DayPart::LateNight.to_chinese(Variant::Traditional),
///     "深夜"
/// );
/// ```
impl ChineseFormat for DayPart {
    fn to_chinese(&self, _variant: Variant) -> Chinese {
        Chinese {
            logograms: match self {
                DayPart::EarlyMorning => "早上",
                DayPart::Morning => "上午",
                DayPart::Midday => "中午",
                DayPart::Afternoon => "下午",
                DayPart::EarlyEvening => "傍晚",
                DayPart::Evening => "晚上",
                DayPart::Midnight => "午夜",
                DayPart::LateNight => "深夜",
            }
            .to_string(),
            omissible: false,
        }
    }
}

lazy_static! {
    static ref PART_OF_DAY_BY_HOUR: HashMap<u8, DayPart> = HashMap::from([
        (5, DayPart::EarlyMorning),
        (6, DayPart::EarlyMorning),
        (7, DayPart::EarlyMorning),
        (8, DayPart::Morning),
        (9, DayPart::Morning),
        (10, DayPart::Morning),
        (11, DayPart::Midday),
        (12, DayPart::Midday),
        (13, DayPart::Midday),
        (14, DayPart::Afternoon),
        (15, DayPart::Afternoon),
        (16, DayPart::Afternoon),
        (17, DayPart::EarlyEvening),
        (18, DayPart::EarlyEvening),
        (19, DayPart::EarlyEvening),
        (20, DayPart::Evening),
        (21, DayPart::Evening),
        (22, DayPart::Evening),
        (23, DayPart::Midnight),
        (0, DayPart::Midnight),
        (1, DayPart::Midnight),
        (2, DayPart::LateNight),
        (3, DayPart::LateNight),
        (4, DayPart::LateNight),
    ]);
}