Class: RecurringDateEnumerator

Inherits:
Enumerator
  • Object
show all
Defined in:
lib/recurring_date_enumerator.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(range) ⇒ RecurringDateEnumerator

Returns a new instance of RecurringDateEnumerator.



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# File 'lib/recurring_date_enumerator.rb', line 4

def initialize(range)
  super() do |result|
    begin
      range.each { |val| block_given? ? yield(result, val) : result << val }
    rescue StopIteration
      nil
    end
  end
end

Class Method Details

.eternity(from: Date.new(1970)) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 14

def self.eternity(from: Date.new(1970))
  RecurringDateEnumerator.new(infinity(from))
end

.infinity(date) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 122

def self.infinity(date)
  Enumerator.new do |y|
    i = date.prev_day
    loop { y << (i = i.next) }
  end
end

Instance Method Details

#inspect ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 118

def inspect
  ['#<RecurringDateEnumerator: 0x', object_id, '>'].join
end

#matching(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 66

def matching(*args)
  select { |date| args.include?(yield(date)) }
end

#mday(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 22

def mday(*args)
  matching(*args, &:mday)
end

#month(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 34

def month(*args)
  matching(*args, &:month)
end

#mweek(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 30

def mweek(*args)
  matching(*args, &:mweek)
end

#not_matching(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 70

def not_matching(*args)
  reject { |date| args.include?(yield(date)) }
end

#not_mday(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 46

def not_mday(*args)
  not_matching(*args, &:mday)
end

#not_month(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 58

def not_month(*args)
  not_matching(*args, &:month)
end

#not_mweek(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 54

def not_mweek(*args)
  not_matching(*args, &:mweek)
end

#not_wday(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 50

def not_wday(*args)
  not_matching(*args, &:wday)
end

#not_yday(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 42

def not_yday(*args)
  not_matching(*args, &:yday)
end

#not_year(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 62

def not_year(*args)
  not_matching(*args, &:year)
end

#pattern(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 74

def pattern(*args)
  select_with_index do |_, i|
    args.any? do |arg|
      ((i + 1) % arg).zero?
    end
  end
end

#reject ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 98

def reject
  RecurringDateEnumerator.new(self) { |result, value| result << value unless yield(value) }
end

#select ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 94

def select
  RecurringDateEnumerator.new(self) { |result, value| result << value if yield(value) }
end

#select_with_index ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 86

def select_with_index
  index = 0
  RecurringDateEnumerator.new(self) do |result, value|
    result << value if yield(value, index)
    index += 1
  end
end

#take(n) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 102

def take(n)
  taken = n
  RecurringDateEnumerator.new(self) do |result, value|
    raise StopIteration if taken.zero?
    result << value
    taken -= 1
  end
end

#take_while ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 111

def take_while
  RecurringDateEnumerator.new(self) do |result, value|
    raise StopIteration unless yield(value)
    result << value
  end
end

#until(arg) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 82

def until(arg)
  take_while { |date| date <= arg.to_date }
end

#wday(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 26

def wday(*args)
  matching(*args, &:wday)
end

#yday(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 18

def yday(*args)
  matching(*args, &:yday)
end

#year(*args) ⇒ Object 



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# File 'lib/recurring_date_enumerator.rb', line 38

def year(*args)
  matching(*args, &:year)
end