daysbetweendates/
date.rs

1//! This module is making a Date type struct and its allows to change to next day
2/// This function is return the year is leak or not
3fn is_leak(year: usize) -> bool {
4    if year % 400 == 0 {
5        true
6    } else if year % 100 == 0 {
7        false
8    } else {
9        year % 4 == 0
10    } 
11}
12/// Date type struct takes 4 argumant year, month, day and leak
13/// ```rust
14/// use daysbetweendates::date::Date;
15/// ```
16pub struct Date {
17    pub year: usize,
18    pub month: usize,
19    pub day: usize,
20    pub leak: bool,
21}
22/// Date have 5 function Date::now, Date::from, Date.next_day, Date.next_month, Date.next_year
23
24impl Date {
25    ///Date::from takes a array dd,mm,yyyy and returns a Date
26    /// # Exemple
27    /// ```rust
28    /// use daysbetweendates::date::Date;
29    /// let date = Date::from([1,1,1999]);
30    /// println!("{}/{}/{}",date.day, date.month, date.year);
31    /// ```
32    pub fn from(date: [usize; 3]) -> Self {
33        Self {
34            year: date[2],
35            month: date[1],
36            day: date[0],
37            leak: is_leak(date[2]),
38        }
39    }
40    /// This function takes Date and add 1 of the day and retruns Date
41    /// # Exemple
42    /// ```rust
43    /// use daysbetweendates::date::Date;
44    /// let mut date = Date::from([1,1,1999]);
45    /// println!("{}/{}/{}",date.day, date.month, date.year);
46    /// date = date.next_day();
47    /// println!("{}/{}/{}",date.day, date.month, date.year);
48    /// ```
49    pub fn next_day(self) -> Self {
50        Self {
51            year: self.year,
52            month: self.month,
53            day: self.day + 1,
54            leak: is_leak(self.year),
55        }
56    }
57    /// This function takes Date, makes day 1, add 1 to month and return Date
58    ///
59    /// # Exemple
60    /// ```rust
61    /// use daysbetweendates::date::Date;
62    /// let mut date = Date::from([1,1,1999]);
63    /// println!("{}/{}/{}",date.day, date.month, date.year);
64    /// date = date.next_month();
65    /// println!("{}/{}/{}",date.day, date.month, date.year);
66    /// ```
67    pub fn next_month(self) -> Self {
68        Self {
69            year: self.year,
70            month: self.month + 1,
71            day: 1,
72            leak: is_leak(self.year),
73        }
74    }
75    /// This function takes Date, makes day, month 1, add 1 to year and return Date
76    ///
77    /// # Exemple
78    /// ```rust
79    /// use daysbetweendates::date::Date;
80    /// let mut date = Date::from([1,1,1999]);
81    /// println!("{}/{}/{}",date.day, date.month, date.year);
82    /// date = date.next_year();
83    /// println!("{}/{}/{}",date.day, date.month, date.year);
84    /// ```
85    pub fn next_year(self) -> Self {
86        Self {
87            year: self.year + 1,
88            month: 1,
89            day: 1,
90            leak: is_leak(self.year),
91        }
92    }
93}
94
95/// Next function is for the decides next day, next month, next year Takes a Date returns a date
96///
97/// /// # Exemple
98/// ```rust
99/// use daysbetweendates::date::{Date, next};
100/// let mut date = Date::from([31,12,1999]);
101/// let mut counter = 0;
102/// println!("{}/{}/{}",date.day, date.month, date.year);
103/// (date, counter) = next(date, counter);
104/// println!("{}/{}/{} -> {}",date.day, date.month, date.year, counter);
105/// ```
106pub fn next(date: Date, counter: i64) -> (Date, i64) {
107    let mut _month_tup = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
108    if !date.leak {
109        _month_tup = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
110    } else {
111        _month_tup = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
112    }
113    if date.day < _month_tup[date.month - 1] {
114        (date.next_day(), counter + 1)
115    } else if date.month < 12 {
116        (date.next_month(), counter + 1)
117    } else {
118        (date.next_year(), counter + 1)
119    }
120}
daysbetweendates/date.rs

daysbetweendates/
date.rs
