todo2 0.1.3

An enhanced todo macro inspired by todo_or_die
Documentation 
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

#[cfg(feature = "chrono-backend")]
pub(super) mod chrono;
#[cfg(not(any(feature = "chrono-backend", feature = "time-backend")))]
pub(super) mod simple;
#[cfg(feature = "time-backend")]
pub(super) mod time;

use crate::Result;

pub(super) const ONE_HOUR: u64 = 3600;

pub(super) trait UnixTimeCalc {
    fn new() -> Self;
    fn is_leap_year(year: u32) -> bool {
        year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)
    }
    fn year(&mut self, year: String) -> Result<()>;
    fn month(&mut self, month: String) -> Result<()>;
    fn day(&mut self, day: String) -> Result<()>;
    fn is_year_set(&self) -> bool;
    fn is_month_set(&self) -> bool;
    fn is_day_set(&self) -> bool;
    fn calc(&self) -> Result<u64>;
}

macro_rules! impl_unixtime_calc {
    ($t:ty, $mt:ty, $dt:ty) => {
        impl UnixTimeCalc for $t {
            fn new() -> Self {
                Self {
                    year: 0,
                    month: None,
                    day: None,
                }
            }

            fn year(&mut self, year: String) -> Result<()> {
                self.year = year.parse::<i32>().map_err(|_| "Invalid year")?;
                Ok(())
            }

            fn month(&mut self, month: String) -> Result<()> {
                self.month = Some(month.parse::<$mt>().map_err(|_| "Invalid month")?);
                Ok(())
            }

            fn day(&mut self, day: String) -> Result<()> {
                self.day = Some(day.parse::<$dt>().map_err(|_| "Invalid day")?);
                Ok(())
            }

            fn is_year_set(&self) -> bool {
                self.year != 0
            }

            fn is_month_set(&self) -> bool {
                self.month.is_some()
            }

            fn is_day_set(&self) -> bool {
                self.day.is_some()
            }

            fn calc(&self) -> Result<u64> {
                self._calc()
            }
        }
    };
}

#[cfg(feature = "chrono-backend")]
impl_unixtime_calc!(chrono::ChronoCalc, u32, u32);
#[cfg(feature = "time-backend")]
impl_unixtime_calc!(time::TimeCalc, u8, u8);

#[cfg(test)]
mod tests {
    use super::*;

    const YYY_MM_DD_INPUTS: [((&str, &str, &str), u64); 3] = [
        (("2003", "2", "2"), 1_044_144_000),
        (("2001", "2", "28"), 983_318_400),
        (("2033", "3", "26"), 1_995_408_000),
    ];

    const YYY_MM_INPUTS: [((&str, &str), u64); 3] = [
        (("2003", "2"), 1_044_057_600),
        (("2001", "2"), 980_985_600),
        (("2033", "3"), 1_993_248_000),
    ];

    const YYY_INPUTS: [(&str, u64); 3] = [
        ("2003", 1_041_379_200),
        ("2001", 978_307_200),
        ("2033", 1_988_150_400),
    ];

    fn test_calc<C: UnixTimeCalc>() -> Result<()> {
        for ((year, month, day), expected) in YYY_MM_DD_INPUTS.iter() {
            let mut calc = C::new();
            calc.year(year.to_string())?;
            calc.month(month.to_string())?;
            calc.day(day.to_string())?;
            assert_eq!(calc.calc()?, *expected);
        }

        for ((year, month), expected) in YYY_MM_INPUTS.iter() {
            let mut calc = C::new();
            calc.year(year.to_string())?;
            calc.month(month.to_string())?;
            assert_eq!(calc.calc()?, *expected);
        }

        for (year, expected) in YYY_INPUTS.iter() {
            let mut calc = C::new();
            calc.year(year.to_string())?;
            assert_eq!(calc.calc()?, *expected);
        }

        Ok(())
    }

    #[cfg(not(any(feature = "chrono-backend", feature = "time-backend")))]
    #[test]
    #[ignore] // We know that the simple backend is not accurate right now
    fn test_calc_simple() -> Result<()> {
        test_calc::<simple::SimpleCalc>()
    }

    #[cfg(feature = "chrono-backend")]
    #[test]
    fn test_calc_chrono() -> Result<()> {
        test_calc::<chrono::ChronoCalc>()
    }

    #[cfg(feature = "time-backend")]
    #[test]
    fn test_calc_time() -> Result<()> {
        test_calc::<time::TimeCalc>()
    }
}