Andy Burke
51acbef35f
chore: session timoeouts up
feature: started to look at doing something around durations for some
forgotten reason, but don't want to just abandon this now 🤷
91 lines
5.2 KiB
TypeScript
91 lines
5.2 KiB
TypeScript
enum TimeUnit {
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// Plancks = (-5.39 * Math.pow( 10, -44 )), // The amount of time light takes to travel one Planck length.
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// quectoseconds = Math.pow( 10, -30), // One nonillionth of a second.
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// rontoseconds = Math.pow( 10, -27 ), // One octillionth of a second.
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// yoctoseconds = Math.pow( 10, -24 ), // One septillionth of a second.
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// zeptoseconds = Math.pow( 10, -21 ), // One sextillionth of a second. Time measurement scale of the NIST and JILA strontium atomic clock. Smallest fragment of time currently measurable is 247 zeptoseconds.[3]
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// attoseconds = Math.pow( 10, -18 ), // One quintillionth of a second.
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// femtoseconds = Math.pow( 10, -15 ), // One quadrillionth of a second.
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// svedbergs = Math.pow( 10, -13 ), // 100 femtoseconds, time unit used for sedimentation rates (usually of proteins).
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picoseconds = Math.pow(10, -12), // One trillionth of a second.
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nanoseconds = Math.pow(10, -9), // One billionth of a second. Time for molecules to fluoresce.
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shakes = Math.pow(10, -8), // 10 nanoseconds, also a casual term for a short period of time.
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microseconds = Math.pow(10, -6), // One millionth of a second. Symbol is μs
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milliseconds = Math.pow(10, -3), // One thousandth of a second. Shortest time unit used on stopwatches.
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centiseconds = Math.pow(10, -2), // One hundredth of a second.
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deciseconds = Math.pow(10, -1), // One tenth of a second.
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seconds = 1, // SI base unit for time.
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decasecond = 10, // Ten seconds (one sixth of a minute)
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minutes = 60, // 60 seconds
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hectoseconds = 100, // 100 seconds
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millidays = 86.4, // 1/1000 d (0.001 d) 1.44 minutes, or 86.4 seconds. Also marketed as a ".beat" by the Swatch corporation.
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centidays = 864, // 0.01 d (1 % of a day) 14.4 minutes, or 864 seconds. One-hundredth of a day is 1 cd (centiday), also called "kè" in traditional Chinese timekeeping. The unit was also proposed by Lagrange and endorsed by Rey-Pailhade[5] in the 19th century, named "centijours" (from French centi- 'hundred' and jour 'day').
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kiloseconds = 1000, // About 17 minutes.
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hours = 60 * 60, // 60 minutes (60 * 60 seconds)
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decidays = 144 * 60, // 0.1 d (10 % of a day) 2.4 hours, or 144 minutes. One-tenth of a day is 1 dd (deciday), also called "gēng" in traditional Chinese timekeeping.
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days = 24 * 60 * 60, // 24 h Longest unit used on stopwatches and countdowns. The SI day is exactly 86 400 seconds.
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weeks = 7 * 24 * 60 * 60, // 7 d Historically sometimes also called "sennight".
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decaday = 10 * 24 * 60 * 60, // 10 d (1 Dd) 10 days. A period of time analogous to the concept of "week", used by different societies around the world: the ancient Egyptian calendar, the ancient Chinese calendar, and also the French Republican calendar (in which it was called a décade).
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megaseconds = Math.pow(10, 6), // About 11.6 days.
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fortnights = 14 * 24 * 60 * 60, // 2 weeks 14 days
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hectodays = 100 * 24 * 60 * 60, // 100 d (1 hd) 100 days, roughly equivalent to 1/4 of a year (91.25 days). In Chinese tradition "bǎi rì" (百日) is the hundredth day after one's birth, also called Baby's 100 Days Celebration.
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semesters = 18 * 7 * 24 * 60 * 60, // 18 weeks A division of the academic year.[6] Literally "six months", also used in this sense.
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lunaryears = 354.37 * 24 * 60 * 60, // 354.37 d
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years = 365 * 24 * 60 * 60, // 12 mo
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decades = 10 * 365 * 24 * 60 * 60, // 10 yr
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gigaseconds = Math.pow(10, 9), // About 31.7 years.
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jubilees = 50 * 365 * 24 * 60 * 60, // 50 yr
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centuries = 100 * 365 * 24 * 60 * 60, // 100 yr
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millennium = 1000 * 365 * 24 * 60 * 60, // 1000 yr Also called "kiloannum".
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teraseconds = Math.pow(10, 12), // About 31,709 years.
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petaseconds = Math.pow(10, 15) // About 31709791 years.
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// exaseconds = Math.pow( 10, 18 ), // About 31709791983 years. Approximately 2.3 times the current age of the universe.
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// zettasecond = Math.pow( 10, 21 ), // About 31709791983764 years.
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}
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const UNIT_ABBREVIATIONS: Record<string, TimeUnit> = {
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'ps': TimeUnit.picoseconds,
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'ns': TimeUnit.nanoseconds,
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'us': TimeUnit.microseconds,
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'ms': TimeUnit.milliseconds,
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's': TimeUnit.seconds,
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'm': TimeUnit.minutes,
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'h': TimeUnit.hours,
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'd': TimeUnit.days,
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'w': TimeUnit.weeks,
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'y': TimeUnit.years
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};
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export class Duration {
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constructor(private length: number = 0, private start: number | undefined = undefined) {}
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public static between(start: Date, end: Date, unit: TimeUnit = TimeUnit.milliseconds) {
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const ms_between: number = end.valueOf() - start.valueOf();
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const factor: number = unit / TimeUnit.milliseconds;
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return factor * ms_between;
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}
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public static of(spec: string | number, unit?: TimeUnit): Duration {
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if (unit) {
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return new Duration(Number(spec) * unit);
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}
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let length_in_ms = 0;
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for (const match of `${spec}`.matchAll(/(?<len>([0-9]*[.])?[0-9]+)\W*(?<unit>\w+)\W/g)) {
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const { len, unit_name } = match.groups ?? {};
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if (typeof len !== 'string' || typeof unit_name !== 'string') {
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throw new Error(`Could not parse duraction spec: ${spec}`);
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}
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const time_unit: TimeUnit | undefined = UNIT_ABBREVIATIONS[unit_name] ?? TimeUnit[unit_name as keyof typeof TimeUnit];
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if (!time_unit) {
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throw new Error(`Could not determine a time unit for: ${unit_name}`);
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}
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length_in_ms += Number(len) * time_unit;
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}
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return new Duration(length_in_ms);
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}
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}
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