68 lines
1.9 KiB
Nim
68 lines
1.9 KiB
Nim
import times
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const zeroTime = fromUnix(0)
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const ISO_8601_FORMATS = @[
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"yyyy-MM-dd'T'HH:mm:ssz",
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"yyyy-MM-dd'T'HH:mm:sszzz",
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"yyyy-MM-dd'T'HH:mm:ss'.'fffzzz"
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]
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proc format*(ti: TimeInterval, fmt: string): string =
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let info = (fromUnix(0) + ti).utc
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return info.format(fmt)
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# Will be deprecated in Nim 0.18.1 as it will exist in the standard times module.
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proc `-`*(a, b: DateTime): Duration {.deprecated} =
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return times.`-`(a,b)
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proc `<`*(a, b: DateTime): bool {.deprecated} =
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return times.`<`(a,b)
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proc `<=`*(a, b: DateTime): bool {.deprecated} =
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return times.`<=`(a,b)
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proc `<`*(a, b: TimeInterval): bool =
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return (zeroTime + a) < (zeroTime + b)
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proc `<=`*(a, b: TimeInterval): bool =
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return (zeroTime + a) <= (zeroTime + b)
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proc between*(a, s, e: DateTime): bool =
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return times.`<=`(s, a) and times.`<`(a, e)
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proc cmp*(a, b: DateTime): int =
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if b == a: return 0
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elif times.`<`(a, b): return -1
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else: return 1
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proc startOfDay*(dt: DateTime): DateTime =
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result = dt
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result.hour = 0
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result.minute = 0
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result.second = 0
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result.nanosecond = 0
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proc trimNanoSec*(dt: DateTime): DateTime =
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result = dt
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result.nanosecond = 0
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proc startOfWeek*(ti: DateTime, startDay = dMon): DateTime =
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var diff = (ti.weekday.ord - startDay.ord)
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if diff < 0: diff += 7
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return (ti - diff.days).startOfDay
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proc parseIso8601*(val: string): DateTime =
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var errString = ""
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for df in ISO_8601_FORMATS:
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try: return val.parse(df)
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except: errString &= "\n" & getCurrentExceptionMsg()
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raise newException(Exception, "Could not parse date. Tried:" & errString)
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proc formatIso8601*(d: DateTime): string =
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return d.format(ISO_8601_FORMATS[2])
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# This is a workaround needed due a bug in Nim's times.parse procedure.
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# see: https://github.com/nim-lang/Nim/issues/4922
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template fixedParse*(value, format: string): DateTime {.deprecated.} =
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parse(value, format)
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