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# File 'lib/ice_cube/parsers/ical_parser.rb', line 29
def self.rule_from_ical(ical)
raise ArgumentError, 'empty ical rule' if ical.nil?
validations = {}
params = {validations: validations, interval: 1}
ical.split(';').each do |rule|
(name, value) = rule.split('=')
raise ArgumentError, "Invalid iCal rule component" if value.nil?
value.strip!
case name
when 'FREQ'
params[:rule_type] = "IceCube::#{value[0]}#{value.downcase[1..-1]}Rule"
when 'INTERVAL'
params[:interval] = value.to_i
when 'COUNT'
params[:count] = value.to_i
when 'UNTIL'
params[:until] = TimeUtil.deserialize_time(value).utc
when 'WKST'
params[:week_start] = TimeUtil.ical_day_to_symbol(value)
when 'BYSECOND'
validations[:second_of_minute] = value.split(',').map(&:to_i)
when 'BYMINUTE'
validations[:minute_of_hour] = value.split(',').map(&:to_i)
when 'BYHOUR'
validations[:hour_of_day] = value.split(',').map(&:to_i)
when 'BYDAY'
dows = {}
days = []
value.split(',').each do |expr|
day = TimeUtil.ical_day_to_symbol(expr.strip[-2..-1])
if expr.strip.length > 2 occ = expr[0..-3].to_i
dows[day].nil? ? dows[day] = [occ] : dows[day].push(occ)
days.delete(TimeUtil.sym_to_wday(day))
else
days.push TimeUtil.sym_to_wday(day) if dows[day].nil?
end
end
validations[:day_of_week] = dows unless dows.empty?
validations[:day] = days unless days.empty?
when 'BYMONTHDAY'
validations[:day_of_month] = value.split(',').map(&:to_i)
when 'BYMONTH'
validations[:month_of_year] = value.split(',').map(&:to_i)
when 'BYYEARDAY'
validations[:day_of_year] = value.split(',').map(&:to_i)
when 'BYSETPOS'
else
validations[name] = nil end
end
Rule.from_hash(params)
end
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