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schedule_run.rb
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Sun, May 18, 12:01 AM

schedule_run.rb
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# ScheduleRun is a helper class that modelizes the run directives of a schedule
# resource.
#
# It can have 3 levels:
#
# * full
# * differential
# * incremental
#
# Each ScheduleRun instance holds info about the execution time of the schedule:
#
# * month specification is optional and is described by:
# - month: full name (eg april) | month name three first letters (eg jul)
# - month_range: month-month
# - monthly: 'monthly'
# * day specification is required and is described by:
# - week_number (optional): weeks number in full text (eg: third, fourth)
# - week_range (optional): week_number-week_number
# - day: first three letters of day (eg: mon, fri)
# - day_range: day-day
# * time specification is required and is described by:
# - 24h time (eg: 03:00)
#
# Schedule Run examples:
#
# Level=Full monthly first mon at 12:21
# Level=Full first sun at 12:34
# Level=Differential second-fifth sat at 15:23
# Level=Incremental mon-sat at 08:00
class ScheduleRun < ActiveRecord::Base
establish_connection ARCHIVING_CONF
enum level: { full: 0, differential: 1, incremental: 2 }
MONTH_KW = %w{jan feb mar apr may jun jul aug sep oct nov dec january february march
april may june july august september october november december}
DAYS = (1..31).to_a
WDAY_KW = %w{mon tue wed thu fri sat sun}
WEEK_KW = %w{first second third fourth fifth}
belongs_to :schedule
validates :day, :time, :level, presence: true
validate :correct_chars
validate :month_valid, if: "month.present?"
validate :time_valid
validate :day_valid
def self.options_for_select
levels.keys.zip levels.keys
end
# Builds a sane default schedule_run
#
# @return [ScheduleRun]
def default_run
self.level = :full
self.day = "first sun"
self.time = '04:00'
end
# Composes the schedule line for the bacula configuration
#
# @return [String]
def schedule_line
[ level_to_config, pool_to_config, month, day, "at #{time}"].join(" ")
end
# Provides a human readable projection of the schedule run
#
# @return [String]
def human_readable
["#{level.capitalize} backup", month, day, "at #{time}"].join(' ')
end
private
def correct_chars
[:month, :day, :time].each do |x|
if self.send(x) && self.send(x).to_s.gsub(/[0-9a-zA-Z\-:,]/, '').present?
self.errors.add(x, 'Invalid characters')
end
end
end
def month_valid
if !month_format? && !valid_month_range?
self.errors.add(:month, 'Invalid month')
end
end
def month_format?
month_regex = "^(#{MONTH_KW.join('|')}|monthly)$"
month.match(month_regex).present?
end
def valid_month_range?
months = month.split('-')
return false if months.length != 2
MONTH_KW.index(months.last) % 12 - MONTH_KW.index(months.first) % 12 > 0
end
def time_valid
if !time.match(/^([01][0-9]|2[0-3]):[0-5][0-9]$/)
self.errors.add(:time, 'Invalid time')
end
end
def day_valid
components = day.split(' ')
if components.length < 1 || components.length > 2
self.errors.add(:day, 'Invalid day')
return false
end
if !valid_day?(components.last) && !valid_day_range?(components.last) &&
!valid_day_listing?(components.last)
self.errors.add(:day, 'Invalid day')
return false
end
if components.length == 2 && !valid_week?(components.first) &&
!valid_week_range?(components.first)
self.errors.add(:day, 'Invalid day')
return false
end
true
end
def valid_day_listing?(listing)
listing.split(',').all? { |d| WDAY_KW.include? d }
end
def valid_day?(a_day)
WDAY_KW.include? a_day
end
def valid_day_range?(a_range)
days = a_range.split('-')
return false if days.length != 2
WDAY_KW.index(days.last) - WDAY_KW.index(days.first) > 0
end
def valid_week?(a_week)
WEEK_KW.include? a_week
end
def valid_week_range?(a_range)
weeks = a_range.split('-')
return false if weeks.length != 2
WEEK_KW.index(weeks.last) - WEEK_KW.index(weeks.first) > 0
end
def level_to_config
"Level=#{level.capitalize}"
end
def pool_to_config
"Pool=#{ConfigurationSetting.current_pool_settings[level.to_sym]}"
end
end

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