module Fugit::Nat

A natural language set of parsers for fugit. Focuses on cron expressions. The rest is better left to Chronic and friends.

Constants

MAX_INPUT_LENGTH

Public Class Methods

do_parse(s, opts={}) click to toggle source

# File lib/fugit/nat.rb, line 42
def do_parse(s, opts={})

  parse(s, opts.merge(do_parse: true)) ||
  fail(ArgumentError.new("could not parse a nat #{s.inspect}"))
end

parse(s, opts={}) click to toggle source

# File lib/fugit/nat.rb, line 14
      def parse(s, opts={})

        return s if s.is_a?(Fugit::Cron) || s.is_a?(Fugit::Duration)

        return nil unless s.is_a?(String)

        s = s.strip

        if s.length > MAX_INPUT_LENGTH

          fail ArgumentError.new(
            "input too long for a nat string, " +
            "#{s.length} > #{MAX_INPUT_LENGTH}"
          ) if opts[:do_parse]

          return nil
        end

#p s; Raabro.pp(Parser.parse(s, debug: 3), colours: true)
#(p s; Raabro.pp(Parser.parse(s, debug: 1), colours: true)) rescue nil

        if slots = Parser.parse(s)
          slots.to_crons(opts.merge(_s: s))
        else
          nil
        end
      end