mirror of
https://github.com/simonmichael/hledger.git
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656 lines
25 KiB
Haskell
656 lines
25 KiB
Haskell
{-|
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Date parsing and utilities for hledger.
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For date and time values, we use the standard Day and UTCTime types.
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A 'SmartDate' is a date which may be partially-specified or relative.
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Eg 2008\/12\/31, but also 2008\/12, 12\/31, tomorrow, last week, next year.
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We represent these as a triple of strings like (\"2008\",\"12\",\"\"),
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(\"\",\"\",\"tomorrow\"), (\"\",\"last\",\"week\").
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A 'DateSpan' is the span of time between two specific calendar dates, or
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an open-ended span where one or both dates are unspecified. (A date span
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with both ends unspecified matches all dates.)
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An 'Interval' is ledger's \"reporting interval\" - weekly, monthly,
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quarterly, etc.
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-}
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-- XXX fromGregorian silently clips bad dates, use fromGregorianValid instead ?
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module Hledger.Data.Dates
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where
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import Control.Monad
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import Data.List
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import Data.Maybe
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import Data.Time.Format
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import Data.Time.Calendar
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import Data.Time.Calendar.OrdinalDate
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import Data.Time.Clock
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import Data.Time.LocalTime
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import Safe (readMay)
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import System.Locale (defaultTimeLocale)
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import Test.HUnit
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import Text.ParserCombinators.Parsec
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import Text.Printf
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import Hledger.Data.Types
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import Hledger.Utils
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showDate :: Day -> String
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showDate = formatTime defaultTimeLocale "%C%y/%m/%d"
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-- | Get the current local date.
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getCurrentDay :: IO Day
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getCurrentDay = do
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t <- getZonedTime
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return $ localDay (zonedTimeToLocalTime t)
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-- | Get the current local year.
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getCurrentYear :: IO Integer
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getCurrentYear = do
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(y,_,_) <- toGregorian `fmap` getCurrentDay
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return y
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elapsedSeconds :: Fractional a => UTCTime -> UTCTime -> a
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elapsedSeconds t1 = realToFrac . diffUTCTime t1
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-- | Split a DateSpan into one or more consecutive spans at the specified interval.
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splitSpan :: Interval -> DateSpan -> [DateSpan]
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splitSpan _ (DateSpan Nothing Nothing) = [DateSpan Nothing Nothing]
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splitSpan NoInterval s = [s]
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splitSpan (Days n) s = splitspan startofday (applyN n nextday) s
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splitSpan (Weeks n) s = splitspan startofweek (applyN n nextweek) s
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splitSpan (Months n) s = splitspan startofmonth (applyN n nextmonth) s
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splitSpan (Quarters n) s = splitspan startofquarter (applyN n nextquarter) s
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splitSpan (Years n) s = splitspan startofyear (applyN n nextyear) s
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splitSpan (DayOfMonth n) s = splitspan (nthdayofmonthcontaining n) (applyN (n-1) nextday . nextmonth) s
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splitSpan (DayOfWeek n) s = splitspan (nthdayofweekcontaining n) (applyN (n-1) nextday . nextweek) s
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-- splitSpan (WeekOfYear n) s = splitspan startofweek (applyN n nextweek) s
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-- splitSpan (MonthOfYear n) s = splitspan startofmonth (applyN n nextmonth) s
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-- splitSpan (QuarterOfYear n) s = splitspan startofquarter (applyN n nextquarter) s
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-- Split the given span using the provided helper functions:
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-- start is applied to the span's start date to get the first sub-span's start date
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-- next is applied to a sub-span's start date to get the next sub-span's start date
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splitspan :: (Day -> Day) -> (Day -> Day) -> DateSpan -> [DateSpan]
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splitspan _ _ (DateSpan Nothing Nothing) = []
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splitspan start next (DateSpan Nothing (Just e)) = splitspan start next (DateSpan (Just $ start e) (Just $ next $ start e))
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splitspan start next (DateSpan (Just s) Nothing) = splitspan start next (DateSpan (Just $ start s) (Just $ next $ start s))
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splitspan start next span@(DateSpan (Just s) (Just e))
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| s == e = [span]
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| otherwise = splitspan' start next span
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where
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splitspan' start next (DateSpan (Just s) (Just e))
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| s >= e = []
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| otherwise = DateSpan (Just subs) (Just sube) : splitspan' start next (DateSpan (Just sube) (Just e))
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where subs = start s
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sube = next subs
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splitspan' _ _ _ = error' "won't happen, avoids warnings"
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-- | Count the days in a DateSpan, or if it is open-ended return Nothing.
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daysInSpan :: DateSpan -> Maybe Integer
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daysInSpan (DateSpan (Just d1) (Just d2)) = Just $ diffDays d2 d1
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daysInSpan _ = Nothing
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-- | Does the span include the given date ?
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spanContainsDate :: DateSpan -> Day -> Bool
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spanContainsDate (DateSpan Nothing Nothing) _ = True
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spanContainsDate (DateSpan Nothing (Just e)) d = d < e
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spanContainsDate (DateSpan (Just b) Nothing) d = d >= b
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spanContainsDate (DateSpan (Just b) (Just e)) d = d >= b && d < e
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-- | Combine two datespans, filling any unspecified dates in the first
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-- with dates from the second.
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orDatesFrom (DateSpan a1 b1) (DateSpan a2 b2) = DateSpan a b
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where a = if isJust a1 then a1 else a2
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b = if isJust b1 then b1 else b2
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-- | Parse a period expression to an Interval and overall DateSpan using
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-- the provided reference date, or return a parse error.
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parsePeriodExpr :: Day -> String -> Either ParseError (Interval, DateSpan)
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parsePeriodExpr refdate = parsewith (periodexpr refdate)
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maybePeriod :: Day -> String -> Maybe (Interval,DateSpan)
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maybePeriod refdate = either (const Nothing) Just . parsePeriodExpr refdate
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-- | Show a DateSpan as a human-readable pseudo-period-expression string.
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dateSpanAsText :: DateSpan -> String
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dateSpanAsText (DateSpan Nothing Nothing) = "all"
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dateSpanAsText (DateSpan Nothing (Just e)) = printf "to %s" (show e)
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dateSpanAsText (DateSpan (Just b) Nothing) = printf "from %s" (show b)
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dateSpanAsText (DateSpan (Just b) (Just e)) = printf "%s to %s" (show b) (show e)
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-- | Convert a single smart date string to a date span using the provided
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-- reference date, or raise an error.
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spanFromSmartDateString :: Day -> String -> DateSpan
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spanFromSmartDateString refdate s = spanFromSmartDate refdate sdate
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where
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sdate = fromparse $ parsewith smartdateonly s
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spanFromSmartDate :: Day -> SmartDate -> DateSpan
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spanFromSmartDate refdate sdate = DateSpan (Just b) (Just e)
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where
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(ry,rm,_) = toGregorian refdate
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(b,e) = span sdate
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span :: SmartDate -> (Day,Day)
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span ("","","today") = (refdate, nextday refdate)
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span ("","this","day") = (refdate, nextday refdate)
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span ("","","yesterday") = (prevday refdate, refdate)
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span ("","last","day") = (prevday refdate, refdate)
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span ("","","tomorrow") = (nextday refdate, addDays 2 refdate)
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span ("","next","day") = (nextday refdate, addDays 2 refdate)
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span ("","last","week") = (prevweek refdate, thisweek refdate)
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span ("","this","week") = (thisweek refdate, nextweek refdate)
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span ("","next","week") = (nextweek refdate, startofweek $ addDays 14 refdate)
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span ("","last","month") = (prevmonth refdate, thismonth refdate)
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span ("","this","month") = (thismonth refdate, nextmonth refdate)
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span ("","next","month") = (nextmonth refdate, startofmonth $ addGregorianMonthsClip 2 refdate)
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span ("","last","quarter") = (prevquarter refdate, thisquarter refdate)
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span ("","this","quarter") = (thisquarter refdate, nextquarter refdate)
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span ("","next","quarter") = (nextquarter refdate, startofquarter $ addGregorianMonthsClip 6 refdate)
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span ("","last","year") = (prevyear refdate, thisyear refdate)
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span ("","this","year") = (thisyear refdate, nextyear refdate)
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span ("","next","year") = (nextyear refdate, startofyear $ addGregorianYearsClip 2 refdate)
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span ("","",d) = (day, nextday day) where day = fromGregorian ry rm (read d)
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span ("",m,"") = (startofmonth day, nextmonth day) where day = fromGregorian ry (read m) 1
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span ("",m,d) = (day, nextday day) where day = fromGregorian ry (read m) (read d)
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span (y,"","") = (startofyear day, nextyear day) where day = fromGregorian (read y) 1 1
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span (y,m,"") = (startofmonth day, nextmonth day) where day = fromGregorian (read y) (read m) 1
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span (y,m,d) = (day, nextday day) where day = fromGregorian (read y) (read m) (read d)
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showDay :: Day -> String
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showDay day = printf "%04d/%02d/%02d" y m d where (y,m,d) = toGregorian day
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-- | Convert a smart date string to an explicit yyyy\/mm\/dd string using
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-- the provided reference date, or raise an error.
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fixSmartDateStr :: Day -> String -> String
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fixSmartDateStr t s = either parseerror id $ fixSmartDateStrEither t s
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-- | A safe version of fixSmartDateStr.
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fixSmartDateStrEither :: Day -> String -> Either ParseError String
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fixSmartDateStrEither t s = case parsewith smartdateonly (lowercase s) of
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Right sd -> Right $ showDay $ fixSmartDate t sd
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Left e -> Left e
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-- | Convert a SmartDate to an absolute date using the provided reference date.
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fixSmartDate :: Day -> SmartDate -> Day
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fixSmartDate refdate sdate = fix sdate
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where
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fix :: SmartDate -> Day
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fix ("","","today") = fromGregorian ry rm rd
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fix ("","this","day") = fromGregorian ry rm rd
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fix ("","","yesterday") = prevday refdate
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fix ("","last","day") = prevday refdate
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fix ("","","tomorrow") = nextday refdate
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fix ("","next","day") = nextday refdate
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fix ("","last","week") = prevweek refdate
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fix ("","this","week") = thisweek refdate
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fix ("","next","week") = nextweek refdate
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fix ("","last","month") = prevmonth refdate
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fix ("","this","month") = thismonth refdate
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fix ("","next","month") = nextmonth refdate
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fix ("","last","quarter") = prevquarter refdate
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fix ("","this","quarter") = thisquarter refdate
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fix ("","next","quarter") = nextquarter refdate
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fix ("","last","year") = prevyear refdate
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fix ("","this","year") = thisyear refdate
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fix ("","next","year") = nextyear refdate
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fix ("","",d) = fromGregorian ry rm (read d)
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fix ("",m,"") = fromGregorian ry (read m) 1
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fix ("",m,d) = fromGregorian ry (read m) (read d)
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fix (y,"","") = fromGregorian (read y) 1 1
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fix (y,m,"") = fromGregorian (read y) (read m) 1
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fix (y,m,d) = fromGregorian (read y) (read m) (read d)
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(ry,rm,rd) = toGregorian refdate
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prevday :: Day -> Day
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prevday = addDays (-1)
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nextday = addDays 1
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startofday = id
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thisweek = startofweek
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prevweek = startofweek . addDays (-7)
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nextweek = startofweek . addDays 7
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startofweek day = fromMondayStartWeek y w 1
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where
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(y,_,_) = toGregorian day
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(w,_) = mondayStartWeek day
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thismonth = startofmonth
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prevmonth = startofmonth . addGregorianMonthsClip (-1)
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nextmonth = startofmonth . addGregorianMonthsClip 1
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startofmonth day = fromGregorian y m 1 where (y,m,_) = toGregorian day
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thisquarter = startofquarter
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prevquarter = startofquarter . addGregorianMonthsClip (-3)
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nextquarter = startofquarter . addGregorianMonthsClip 3
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startofquarter day = fromGregorian y (firstmonthofquarter m) 1
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where
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(y,m,_) = toGregorian day
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firstmonthofquarter m = ((m-1) `div` 3) * 3 + 1
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thisyear = startofyear
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prevyear = startofyear . addGregorianYearsClip (-1)
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nextyear = startofyear . addGregorianYearsClip 1
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startofyear day = fromGregorian y 1 1 where (y,_,_) = toGregorian day
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nthdayofmonthcontaining n d | d1 >= d = d1
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| otherwise = d2
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where d1 = addDays (fromIntegral n-1) s
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d2 = addDays (fromIntegral n-1) $ nextmonth s
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s = startofmonth d
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nthdayofweekcontaining n d | d1 >= d = d1
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| otherwise = d2
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where d1 = addDays (fromIntegral n-1) s
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d2 = addDays (fromIntegral n-1) $ nextweek s
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s = startofweek d
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----------------------------------------------------------------------
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-- parsing
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firstJust ms = case dropWhile (==Nothing) ms of
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[] -> Nothing
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(md:_) -> md
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-- | Parse a couple of date-time string formats to a time type.
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parsedatetimeM :: String -> Maybe LocalTime
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parsedatetimeM s = firstJust [
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parseTime defaultTimeLocale "%Y/%m/%d %H:%M:%S" s,
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parseTime defaultTimeLocale "%Y-%m-%d %H:%M:%S" s
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]
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-- | Parse a couple of date string formats to a time type.
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parsedateM :: String -> Maybe Day
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parsedateM s = firstJust [
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parseTime defaultTimeLocale "%Y/%m/%d" s,
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parseTime defaultTimeLocale "%Y-%m-%d" s
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]
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-- | Parse a date-time string to a time type, or raise an error.
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parsedatetime :: String -> LocalTime
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parsedatetime s = fromMaybe (error' $ "could not parse timestamp \"" ++ s ++ "\"")
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(parsedatetimeM s)
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-- | Parse a date string to a time type, or raise an error.
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parsedate :: String -> Day
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parsedate s = fromMaybe (error' $ "could not parse date \"" ++ s ++ "\"")
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(parsedateM s)
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-- | Parse a time string to a time type using the provided pattern, or
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-- return the default.
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parsetimewith :: ParseTime t => String -> String -> t -> t
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parsetimewith pat s def = fromMaybe def $ parseTime defaultTimeLocale pat s
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{-|
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Parse a date in any of the formats allowed in ledger's period expressions,
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and maybe some others:
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> 2004
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> 2004/10
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> 2004/10/1
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> 10/1
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> 21
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> october, oct
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> yesterday, today, tomorrow
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> this/next/last week/day/month/quarter/year
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Returns a SmartDate, to be converted to a full date later (see fixSmartDate).
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Assumes any text in the parse stream has been lowercased.
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-}
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smartdate :: GenParser Char st SmartDate
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smartdate = do
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-- XXX maybe obscures date errors ? see ledgerdate
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(y,m,d) <- choice' [yyyymmdd, ymd, ym, md, y, d, month, mon, today, yesterday, tomorrow, lastthisnextthing]
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return (y,m,d)
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-- | Like smartdate, but there must be nothing other than whitespace after the date.
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smartdateonly :: GenParser Char st SmartDate
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smartdateonly = do
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d <- smartdate
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many spacenonewline
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eof
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return d
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datesepchars = "/-."
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datesepchar = oneOf datesepchars
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validYear, validMonth, validDay :: String -> Bool
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validYear s = length s >= 4 && isJust (readMay s :: Maybe Int)
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validMonth s = maybe False (\n -> n>=1 && n<=12) $ readMay s
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validDay s = maybe False (\n -> n>=1 && n<=31) $ readMay s
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failIfInvalidYear, failIfInvalidMonth, failIfInvalidDay :: (Monad m) => String -> m ()
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failIfInvalidYear s = unless (validYear s) $ fail $ "bad year number: " ++ s
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failIfInvalidMonth s = unless (validMonth s) $ fail $ "bad month number: " ++ s
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failIfInvalidDay s = unless (validDay s) $ fail $ "bad day number: " ++ s
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yyyymmdd :: GenParser Char st SmartDate
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yyyymmdd = do
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y <- count 4 digit
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m <- count 2 digit
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failIfInvalidMonth m
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d <- count 2 digit
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failIfInvalidDay d
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return (y,m,d)
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ymd :: GenParser Char st SmartDate
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ymd = do
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y <- many1 digit
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failIfInvalidYear y
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datesepchar
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m <- many1 digit
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failIfInvalidMonth m
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datesepchar
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d <- many1 digit
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failIfInvalidDay d
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return $ (y,m,d)
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ym :: GenParser Char st SmartDate
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ym = do
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y <- many1 digit
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failIfInvalidYear y
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datesepchar
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m <- many1 digit
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failIfInvalidMonth m
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return (y,m,"")
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y :: GenParser Char st SmartDate
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y = do
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y <- many1 digit
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failIfInvalidYear y
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return (y,"","")
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d :: GenParser Char st SmartDate
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d = do
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d <- many1 digit
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failIfInvalidDay d
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return ("","",d)
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md :: GenParser Char st SmartDate
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md = do
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m <- many1 digit
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failIfInvalidMonth m
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datesepchar
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d <- many1 digit
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failIfInvalidDay d
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return ("",m,d)
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months = ["january","february","march","april","may","june",
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"july","august","september","october","november","december"]
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monthabbrevs = ["jan","feb","mar","apr","may","jun","jul","aug","sep","oct","nov","dec"]
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weekdays = ["monday","tuesday","wednesday","thursday","friday","saturday","sunday"]
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weekdayabbrevs = ["mon","tue","wed","thu","fri","sat","sun"]
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monthIndex s = maybe 0 (+1) $ lowercase s `elemIndex` months
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monIndex s = maybe 0 (+1) $ lowercase s `elemIndex` monthabbrevs
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month :: GenParser Char st SmartDate
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month = do
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m <- choice $ map (try . string) months
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let i = monthIndex m
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return ("",show i,"")
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mon :: GenParser Char st SmartDate
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mon = do
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m <- choice $ map (try . string) monthabbrevs
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let i = monIndex m
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return ("",show i,"")
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today,yesterday,tomorrow :: GenParser Char st SmartDate
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today = string "today" >> return ("","","today")
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yesterday = string "yesterday" >> return ("","","yesterday")
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tomorrow = string "tomorrow" >> return ("","","tomorrow")
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lastthisnextthing :: GenParser Char st SmartDate
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lastthisnextthing = do
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r <- choice [
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string "last"
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,string "this"
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,string "next"
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]
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many spacenonewline -- make the space optional for easier scripting
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p <- choice [
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string "day"
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,string "week"
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,string "month"
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,string "quarter"
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,string "year"
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]
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-- XXX support these in fixSmartDate
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-- ++ (map string $ months ++ monthabbrevs ++ weekdays ++ weekdayabbrevs)
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return ("",r,p)
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periodexpr :: Day -> GenParser Char st (Interval, DateSpan)
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periodexpr rdate = choice $ map try [
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intervalanddateperiodexpr rdate,
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intervalperiodexpr,
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dateperiodexpr rdate,
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(return (NoInterval,DateSpan Nothing Nothing))
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]
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intervalanddateperiodexpr :: Day -> GenParser Char st (Interval, DateSpan)
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intervalanddateperiodexpr rdate = do
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many spacenonewline
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i <- reportinginterval
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many spacenonewline
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s <- periodexprdatespan rdate
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return (i,s)
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intervalperiodexpr :: GenParser Char st (Interval, DateSpan)
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intervalperiodexpr = do
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many spacenonewline
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i <- reportinginterval
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|
return (i, DateSpan Nothing Nothing)
|
|
|
|
dateperiodexpr :: Day -> GenParser Char st (Interval, DateSpan)
|
|
dateperiodexpr rdate = do
|
|
many spacenonewline
|
|
s <- periodexprdatespan rdate
|
|
return (NoInterval, s)
|
|
|
|
-- Parse a reporting interval.
|
|
reportinginterval :: GenParser Char st Interval
|
|
reportinginterval = choice' [
|
|
tryinterval "day" "daily" Days,
|
|
tryinterval "week" "weekly" Weeks,
|
|
tryinterval "month" "monthly" Months,
|
|
tryinterval "quarter" "quarterly" Quarters,
|
|
tryinterval "year" "yearly" Years,
|
|
do string "biweekly"
|
|
return $ Weeks 2,
|
|
do string "bimonthly"
|
|
return $ Months 2,
|
|
do string "every"
|
|
many spacenonewline
|
|
n <- fmap read $ many1 digit
|
|
thsuffix
|
|
many spacenonewline
|
|
string "day"
|
|
many spacenonewline
|
|
string "of"
|
|
many spacenonewline
|
|
string "week"
|
|
return $ DayOfWeek n,
|
|
do string "every"
|
|
many spacenonewline
|
|
n <- fmap read $ many1 digit
|
|
thsuffix
|
|
many spacenonewline
|
|
string "day"
|
|
optional $ do
|
|
many spacenonewline
|
|
string "of"
|
|
many spacenonewline
|
|
string "month"
|
|
return $ DayOfMonth n
|
|
]
|
|
where
|
|
|
|
thsuffix = choice' $ map string ["st","nd","rd","th"]
|
|
|
|
-- Parse any of several variants of a basic interval, eg "daily", "every day", "every N days".
|
|
tryinterval :: String -> String -> (Int -> Interval) -> GenParser Char st Interval
|
|
tryinterval singular compact intcons =
|
|
choice' [
|
|
do string compact
|
|
return $ intcons 1,
|
|
do string "every"
|
|
many spacenonewline
|
|
string singular
|
|
return $ intcons 1,
|
|
do string "every"
|
|
many spacenonewline
|
|
n <- fmap read $ many1 digit
|
|
many spacenonewline
|
|
string plural
|
|
return $ intcons n
|
|
]
|
|
where plural = singular ++ "s"
|
|
|
|
periodexprdatespan :: Day -> GenParser Char st DateSpan
|
|
periodexprdatespan rdate = choice $ map try [
|
|
doubledatespan rdate,
|
|
fromdatespan rdate,
|
|
todatespan rdate,
|
|
justdatespan rdate
|
|
]
|
|
|
|
doubledatespan :: Day -> GenParser Char st DateSpan
|
|
doubledatespan rdate = do
|
|
optional (string "from" >> many spacenonewline)
|
|
b <- smartdate
|
|
many spacenonewline
|
|
optional (string "to" >> many spacenonewline)
|
|
e <- smartdate
|
|
return $ DateSpan (Just $ fixSmartDate rdate b) (Just $ fixSmartDate rdate e)
|
|
|
|
fromdatespan :: Day -> GenParser Char st DateSpan
|
|
fromdatespan rdate = do
|
|
string "from" >> many spacenonewline
|
|
b <- smartdate
|
|
return $ DateSpan (Just $ fixSmartDate rdate b) Nothing
|
|
|
|
todatespan :: Day -> GenParser Char st DateSpan
|
|
todatespan rdate = do
|
|
string "to" >> many spacenonewline
|
|
e <- smartdate
|
|
return $ DateSpan Nothing (Just $ fixSmartDate rdate e)
|
|
|
|
justdatespan :: Day -> GenParser Char st DateSpan
|
|
justdatespan rdate = do
|
|
optional (string "in" >> many spacenonewline)
|
|
d <- smartdate
|
|
return $ spanFromSmartDate rdate d
|
|
|
|
mkdatespan :: String -> String -> DateSpan
|
|
mkdatespan b = DateSpan (Just $ parsedate b) . Just . parsedate
|
|
|
|
nulldatespan = DateSpan Nothing Nothing
|
|
|
|
nulldate = parsedate "1900/01/01"
|
|
|
|
tests_Hledger_Data_Dates = TestList
|
|
[
|
|
|
|
"parsedate" ~: do
|
|
let date1 = parsedate "2008/11/26"
|
|
parsedate "2008/02/03" `is` parsetimewith "%Y/%m/%d" "2008/02/03" date1
|
|
parsedate "2008-02-03" `is` parsetimewith "%Y/%m/%d" "2008/02/03" date1
|
|
|
|
,"period expressions" ~: do
|
|
let todaysdate = parsedate "2008/11/26"
|
|
let str `gives` result = show (parsewith (periodexpr todaysdate) str) `is` ("Right " ++ result)
|
|
"from aug to oct" `gives` "(NoInterval,DateSpan (Just 2008-08-01) (Just 2008-10-01))"
|
|
"aug to oct" `gives` "(NoInterval,DateSpan (Just 2008-08-01) (Just 2008-10-01))"
|
|
"every 3 days in aug" `gives` "(Days 3,DateSpan (Just 2008-08-01) (Just 2008-09-01))"
|
|
"daily from aug" `gives` "(Days 1,DateSpan (Just 2008-08-01) Nothing)"
|
|
"every week to 2009" `gives` "(Weeks 1,DateSpan Nothing (Just 2009-01-01))"
|
|
|
|
,"splitSpan" ~: do
|
|
let gives (interval, span) = (splitSpan interval span `is`)
|
|
(NoInterval,mkdatespan "2008/01/01" "2009/01/01") `gives`
|
|
[mkdatespan "2008/01/01" "2009/01/01"]
|
|
(Quarters 1,mkdatespan "2008/01/01" "2009/01/01") `gives`
|
|
[mkdatespan "2008/01/01" "2008/04/01"
|
|
,mkdatespan "2008/04/01" "2008/07/01"
|
|
,mkdatespan "2008/07/01" "2008/10/01"
|
|
,mkdatespan "2008/10/01" "2009/01/01"
|
|
]
|
|
(Quarters 1,nulldatespan) `gives`
|
|
[nulldatespan]
|
|
(Days 1,mkdatespan "2008/01/01" "2008/01/01") `gives`
|
|
[mkdatespan "2008/01/01" "2008/01/01"]
|
|
(Quarters 1,mkdatespan "2008/01/01" "2008/01/01") `gives`
|
|
[mkdatespan "2008/01/01" "2008/01/01"]
|
|
(Months 1,mkdatespan "2008/01/01" "2008/04/01") `gives`
|
|
[mkdatespan "2008/01/01" "2008/02/01"
|
|
,mkdatespan "2008/02/01" "2008/03/01"
|
|
,mkdatespan "2008/03/01" "2008/04/01"
|
|
]
|
|
(Months 2,mkdatespan "2008/01/01" "2008/04/01") `gives`
|
|
[mkdatespan "2008/01/01" "2008/03/01"
|
|
,mkdatespan "2008/03/01" "2008/05/01"
|
|
]
|
|
(Weeks 1,mkdatespan "2008/01/01" "2008/01/15") `gives`
|
|
[mkdatespan "2007/12/31" "2008/01/07"
|
|
,mkdatespan "2008/01/07" "2008/01/14"
|
|
,mkdatespan "2008/01/14" "2008/01/21"
|
|
]
|
|
(Weeks 2,mkdatespan "2008/01/01" "2008/01/15") `gives`
|
|
[mkdatespan "2007/12/31" "2008/01/14"
|
|
,mkdatespan "2008/01/14" "2008/01/28"
|
|
]
|
|
(DayOfMonth 2,mkdatespan "2008/01/01" "2008/04/01") `gives`
|
|
[mkdatespan "2008/01/02" "2008/02/02"
|
|
,mkdatespan "2008/02/02" "2008/03/02"
|
|
,mkdatespan "2008/03/02" "2008/04/02"
|
|
]
|
|
(DayOfWeek 2,mkdatespan "2011/01/01" "2011/01/15") `gives`
|
|
[mkdatespan "2011/01/04" "2011/01/11"
|
|
,mkdatespan "2011/01/11" "2011/01/18"
|
|
]
|
|
|
|
,"fixSmartDateStr" ~: do
|
|
let gives = is . fixSmartDateStr (parsedate "2008/11/26")
|
|
"1999-12-02" `gives` "1999/12/02"
|
|
"1999.12.02" `gives` "1999/12/02"
|
|
"1999/3/2" `gives` "1999/03/02"
|
|
"19990302" `gives` "1999/03/02"
|
|
"2008/2" `gives` "2008/02/01"
|
|
"0020/2" `gives` "0020/02/01"
|
|
"1000" `gives` "1000/01/01"
|
|
"4/2" `gives` "2008/04/02"
|
|
"2" `gives` "2008/11/02"
|
|
"January" `gives` "2008/01/01"
|
|
"feb" `gives` "2008/02/01"
|
|
"today" `gives` "2008/11/26"
|
|
"yesterday" `gives` "2008/11/25"
|
|
"tomorrow" `gives` "2008/11/27"
|
|
"this day" `gives` "2008/11/26"
|
|
"last day" `gives` "2008/11/25"
|
|
"next day" `gives` "2008/11/27"
|
|
"this week" `gives` "2008/11/24" -- last monday
|
|
"last week" `gives` "2008/11/17" -- previous monday
|
|
"next week" `gives` "2008/12/01" -- next monday
|
|
"this month" `gives` "2008/11/01"
|
|
"last month" `gives` "2008/10/01"
|
|
"next month" `gives` "2008/12/01"
|
|
"this quarter" `gives` "2008/10/01"
|
|
"last quarter" `gives` "2008/07/01"
|
|
"next quarter" `gives` "2009/01/01"
|
|
"this year" `gives` "2008/01/01"
|
|
"last year" `gives` "2007/01/01"
|
|
"next year" `gives` "2009/01/01"
|
|
-- "last wed" `gives` "2008/11/19"
|
|
-- "next friday" `gives` "2008/11/28"
|
|
-- "next january" `gives` "2009/01/01"
|
|
|
|
]
|