Contents

module Bizside
  class CronValidator
    MIN_MINUTE  = 0
    MAX_MINUTE  = 59
    MIN_HOUR    = 0
    MAX_HOUR    = 23
    MIN_DAY     = 1
    MAX_DAY     = 31
    MIN_MONTH   = 1
    MAX_MONTH   = 12
    MIN_WEEKDAY = 0
    MAX_WEEKDAY = 7
    CRON_ATTR   = %w(minute hour day month weekday)

    def initialize(cron)
      @minute, @hour, @day, @month, @weekday = cron.split
    end

    def valid?
      valid_minute? &&
      valid_hour? &&
      valid_day? &&
      valid_month? &&
      valid_weekday?
    end

    CRON_ATTR.each do |attr|
      class_eval <<-EOS
        private

        def valid_#{attr}?
          valid_format?(@#{attr}) &&
          valid_range_and_step?(MIN_#{attr.upcase}, MAX_#{attr.upcase}, @#{attr})
        end
      EOS
    end

    private

    def valid_format?(value)
      value =~ /\A(\*(\/\d+)?|\d+(,\d+)*(-\d+)*(\/\d+)*)\Z/
    end

    def valid_range_and_step?(min, max, value)
      valid_range?(min, max, value) && valid_step?(min, max, value)
    end

    def valid_range?(min, max, value)
      range_values = get_range_value(value).split(",")
      range_values.reject do |v|
        if v.include?("-")
          range_v = v.split("-")
          (min..max).include?(range_v[0].to_i) &&
          (min..max).include?(range_v[1].to_i) &&
          range_v[0].to_i < range_v[1].to_i
        else
          (min..max).include?(v.to_i)
        end
      end.empty?
    end

    def valid_step?(min, max, value)
      v = get_step_value(value)
      return true if v.empty?

      v != '*' &&
      v.to_i != 0 &&
      (min..max).include?(v.to_i)
    end

    def get_range_value(value)
      value.gsub(/(\/\d*|\*)/, "")
    end

    def get_step_value(value)
      return "" unless value.include?('/')
      value.gsub(/.*\/(.*)/) { $1 }
    end
  end
end

Version data entries

7 entries across 7 versions & 1 rubygems

Version	Path
bizside-2.3.9	lib/bizside/cron_validator.rb
bizside-3.0.3	lib/bizside/cron_validator.rb
bizside-2.3.8	lib/bizside/cron_validator.rb
bizside-3.0.2	lib/bizside/cron_validator.rb
bizside-3.0.1	lib/bizside/cron_validator.rb
bizside-3.0.0	lib/bizside/cron_validator.rb
bizside-2.3.7	lib/bizside/cron_validator.rb