Module: Philiprehberger::CronKit::Parser

Included in:
Expression
Defined in:
lib/philiprehberger/cron_kit/parser.rb

Overview

Parsing logic for 5-field cron expressions. Extracted from Expression to keep class size manageable.

Constant Summary collapse

FIELD_RANGES = 
[
  0..59,  # minute
  0..23,  # hour
  1..31,  # day of month
  1..12,  # month
  0..6    # day of week
].freeze
FIELD_NAMES = 
%w[minute hour day-of-month month day-of-week].freeze
MONTH_NAMES =

Three-letter month names (case-insensitive) mapped to their numeric value.

{
  'JAN' => 1, 'FEB' => 2, 'MAR' => 3, 'APR' => 4, 'MAY' => 5, 'JUN' => 6,
  'JUL' => 7, 'AUG' => 8, 'SEP' => 9, 'OCT' => 10, 'NOV' => 11, 'DEC' => 12
}.freeze
DAY_NAMES =

Three-letter weekday names (case-insensitive) mapped to their numeric value.

{
  'SUN' => 0, 'MON' => 1, 'TUE' => 2, 'WED' => 3, 'THU' => 4, 'FRI' => 5, 'SAT' => 6
}.freeze
DOW_SUNDAY_ALIAS =

Sunday may be written as 7 in the day-of-week field (Vixie cron interop).

7

Instance Method Summary collapse

Instance Method Details

#parse_expression(expression) ⇒ Object

Raises:



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# File 'lib/philiprehberger/cron_kit/parser.rb', line 32

def parse_expression(expression)
  parts = expression.split(/\s+/)

  raise ParseError, "expected 5 fields, got #{parts.length}: #{expression.inspect}" unless parts.length == 5

  parts.each_with_index.map do |part, index|
    parse_field(part, FIELD_RANGES[index], FIELD_NAMES[index])
  end
end