module time pub const ( days_string = 'MonTueWedThuFriSatSun' month_days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] months_string = 'JanFebMarAprMayJunJulAugSepOctNovDec' // The unsigned zero year for internal calculations. // Must be 1 mod 400, and times before it will not compute correctly, // but otherwise can be changed at will. absolute_zero_year = i64(-292277022399) // as i64 seconds_per_minute = 60 seconds_per_hour = 60 * seconds_per_minute seconds_per_day = 24 * seconds_per_hour seconds_per_week = 7 * seconds_per_day days_per_400_years = 365 * 400 + 97 days_per_100_years = 365 * 100 + 24 days_per_4_years = 365 * 4 + 1 days_before = [ 0, 31, 31 + 28, 31 + 28 + 31, 31 + 28 + 31 + 30, 31 + 28 + 31 + 30 + 31, 31 + 28 + 31 + 30 + 31 + 30, 31 + 28 + 31 + 30 + 31 + 30 + 31, 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31, 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30, 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31, ] long_days = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'] ) // Time contains various time units for a point in time. pub struct Time { pub: year int month int day int hour int minute int second int microsecond int unix i64 } // FormatDelimiter contains different time formats. pub enum FormatTime { hhmm12 hhmm24 hhmmss12 hhmmss24 hhmmss24_milli hhmmss24_micro no_time } // FormatDelimiter contains different date formats. pub enum FormatDate { ddmmyy ddmmyyyy mmddyy mmddyyyy mmmd mmmdd mmmddyy mmmddyyyy no_date yyyymmdd yymmdd } // FormatDelimiter contains different time/date delimiters. pub enum FormatDelimiter { dot hyphen slash space no_delimiter } // smonth returns month name. pub fn (t Time) smonth() string { if t.month <= 0 || t.month > 12 { return '---' } i := t.month - 1 return time.months_string[i * 3..(i + 1) * 3] } // unix_time returns Unix time. [inline] pub fn (t Time) unix_time() i64 { return t.unix } // unix_time_milli returns Unix time with millisecond resolution. [inline] pub fn (t Time) unix_time_milli() i64 { return t.unix * 1000 + (t.microsecond / 1000) } // add returns a new time that duration is added pub fn (t Time) add(d Duration) Time { microseconds := i64(t.unix) * 1_000_000 + t.microsecond + d.microseconds() unix := microseconds / 1_000_000 micro := microseconds % 1_000_000 return unix2(unix, int(micro)) } // add_seconds returns a new time struct with an added number of seconds. pub fn (t Time) add_seconds(seconds int) Time { return t.add(seconds * time.second) } // add_days returns a new time struct with an added number of days. pub fn (t Time) add_days(days int) Time { return t.add(days * 24 * time.hour) } // since returns the time duration elapsed since a given time. pub fn since(t Time) Duration { return now() - t } // relative returns a string representation of the difference between t // and the current time. pub fn (t Time) relative() string { znow := now() secs := znow.unix - t.unix if secs <= 30 { // right now or in the future // TODO handle time in the future return 'now' } if secs < 60 { return '1m' } if secs < 3600 { m := secs / 60 if m == 1 { return '1 minute ago' } return '$m minutes ago' } if secs < 3600 * 24 { h := secs / 3600 if h == 1 { return '1 hour ago' } return '$h hours ago' } if secs < 3600 * 24 * 5 { d := secs / 3600 / 24 if d == 1 { return '1 day ago' } return '$d days ago' } if secs > 3600 * 24 * 10000 { return '' } return t.md() } // relative_short returns a string saying how long ago a time occured as follows: // 0-30 seconds: `"now"`; 30-60 seconds: `"1m"`; anything else is rounded to the // nearest minute, hour or day; anything higher than 10000 days (about 27 years) // years returns an empty string. // Some Examples: // `0s -> 'now'`; // `20s -> 'now'`; // `47s -> '1m'`; // `456s -> '7m'`; // `1234s -> '20m'`; // `16834s -> '4h'`; // `1687440s -> '33d'`; // `15842354871s -> ''` pub fn (t Time) relative_short() string { znow := now() secs := znow.unix - t.unix if secs <= 30 { // right now or in the future // TODO handle time in the future return 'now' } if secs < 60 { return '1m' } if secs < 3600 { return '${secs / 60}m' } if secs < 3600 * 24 { return '${secs / 3600}h' } if secs < 3600 * 24 * 5 { return '${secs / 3600 / 24}d' } if secs > 3600 * 24 * 10000 { return '' } return t.md() } // day_of_week returns the current day of a given year, month, and day, // as an integer. pub fn day_of_week(y int, m int, d int) int { // Sakomotho's algorithm is explained here: // https://stackoverflow.com/a/6385934 t := [0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4] mut sy := y if m < 3 { sy = sy - 1 } return (sy + sy / 4 - sy / 100 + sy / 400 + t[m - 1] + d - 1) % 7 + 1 } // day_of_week returns the current day as an integer. pub fn (t Time) day_of_week() int { return day_of_week(t.year, t.month, t.day) } // weekday_str returns the current day as a string. pub fn (t Time) weekday_str() string { i := t.day_of_week() - 1 return time.days_string[i * 3..(i + 1) * 3] } // weekday_str returns the current day as a string. pub fn (t Time) long_weekday_str() string { i := t.day_of_week() - 1 return time.long_days[i] } // is_leap_year checks if a given a year is a leap year. pub fn is_leap_year(year int) bool { return (year % 4 == 0) && (year % 100 != 0 || year % 400 == 0) } // days_in_month returns a number of days in a given month. pub fn days_in_month(month int, year int) ?int { if month > 12 || month < 1 { return error('Invalid month: $month') } extra := if month == 2 && is_leap_year(year) { 1 } else { 0 } res := time.month_days[month - 1] + extra return res } // str returns time in the same format as `parse` expects ("YYYY-MM-DD HH:MM:SS"). pub fn (t Time) debug() string { return 'Time{ year: ${t.year:04} month: ${t.month:02} day: ${t.day:02} hour: ${t.hour:02} minute: ${t.minute:02} second: ${t.second:02} microsecond: ${t.microsecond:06} unix: ${t.unix:07} }' } // A lot of these are taken from the Go library. pub type Duration = i64 pub const ( nanosecond = Duration(1) microsecond = Duration(1000 * nanosecond) millisecond = Duration(1000 * microsecond) second = Duration(1000 * millisecond) minute = Duration(60 * second) hour = Duration(60 * minute) ) // nanoseconds returns the duration as an integer number of nanoseconds. pub fn (d Duration) nanoseconds() i64 { return i64(d) } // microseconds returns the duration as an integer number of microseconds. pub fn (d Duration) microseconds() i64 { return i64(d) / 1000 } // milliseconds returns the duration as an integer number of milliseconds. pub fn (d Duration) milliseconds() i64 { return i64(d) / 1000000 } // The following functions return floating point numbers because it's common to // consider all of them in sub-one intervals // seconds returns the duration as a floating point number of seconds. pub fn (d Duration) seconds() f64 { sec := d / time.second nsec := d % time.second return f64(sec) + f64(nsec) / 1e9 } // minutes returns the duration as a floating point number of minutes. pub fn (d Duration) minutes() f64 { min := d / time.minute nsec := d % time.minute return f64(min) + f64(nsec) / (60 * 1e9) } // hours returns the duration as a floating point number of hours. pub fn (d Duration) hours() f64 { hr := d / time.hour nsec := d % time.hour return f64(hr) + f64(nsec) / (60 * 60 * 1e9) } // offset returns time zone UTC offset in seconds. pub fn offset() int { t := now() local := t.local() return int(local.unix - t.unix) }