Text.Period

Documentation

type Period = (Day, Day)

data PeriodFmt

Constructors

PeriodFmt

Fields

• perFieldSep :: Text

  Separator between year, month and day

• perDateSep :: Text

  Separator between dates in the range, e.g. comma in yyyy-mm-dd,yyyy-mm-dd

parsePeriod :: Text -> Period

Parse period from text representation, which can be either simple date range (yyyy-mm-dd,yyyy-mm-dd) or something shorter like yyyy,yyyy, or even something like yyyy-01-23,03-21 which corresponds to yyyy-01-23,yyyy-03-21. The list of possible combinations can be found in test/Spec.hs.

parsePeriod understands dash as field separator (like yyyy-mm-dd), or accepts short date format (yyyymmdd). It understands comma and underscore as separators between dashed dates (yyyy-mm-dd) and dash as separator between short dates (yyyymmdd).

parsePeriod produces error on unparsable input.

parsePeriodMay :: Text -> Maybe Period

Safe analogue of parsePeriod using Maybe

parsePeriodEither :: Text -> Either String Period

Safe analogue of parsePeriod using Either

formatPeriod :: PeriodFmt -> Period -> Text

Format a period as a simple date range, e.g. yyyy-mm-dd,yyyy-mm-dd

collapsePeriod :: PeriodFmt -> Period -> Text

Format a period in the shortest fashion, e.g. collapse yyyy-01-01,yyyy-01-31 to yyyy-01