System.Cron.Describe

import System.Cron

main :: IO ()
main = do
  let Right cs1 = parseCronSchedule "*/2 * 3 * 4,5,6"
  print $ describe defaultOpts cs1

  let Right cs2 = parseCronSchedule "*/2 12 3 * 4,5,6"
  print $ describe (twentyFourHourFormat <> verbose) cs2

Options handling

defaultOpts :: OptionBuilder

Return a builder that creates the default options for describe. The default options are: notVerbose and twelveHourFormat.

twentyFourHourFormat :: OptionBuilder

Return a builder that sets the options to use a 24-hour time format. This changes how hours are described. Using the 24-hour format, all hours are returned as their left-padded numeric value (01:00, 22:00, etc)

twelveHourFormat :: OptionBuilder

Return a builder that sets the options to use a 12-hour time format. This changes how hours are described. Using the 12-hour format, all hours are returned as their left-padded numeric value with their period (01:00 AM, 10:00 PM, etc)

verbose :: OptionBuilder

Return a builder that sets the options to be verbose. A verbose description doesn't eliminate unnecessary information. The only caveat being that month information is only ever displayed if it isn't "*".

notVerbose :: OptionBuilder

Return a builder that sets the options to not be verbose. All information about the described cron schedule is returned. The only caveat being that month information is only ever displayed if it isn't "*".

data OptionBuilder

Type that holds onto information for constructing options for describe.

Instances

Monoid OptionBuilder

Semigroup OptionBuilder

Describe a CronSchedule

describe :: OptionBuilder -> CronSchedule -> String

Given an OptionBuilder and a CronSchedule parsed with parseCronSchedule, return a human-readable string describing when that schedule will match.