Class: DateUtils::Month

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

Overview

Represents a ‘Month’

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(date = nil) ⇒ Month

create a new Month of given Date



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# File 'lib/date_utils.rb', line 120

def initialize(date=nil)
  date = Date.today if date.nil?
  if date.kind_of?(Date)
    @date = date
    @month = date.month
    @first_day = date.mday > 1 ? (date - ( date.mday - 1)) : date 
    @num_days = 31 if [1,3,5,7,8,10,12].include?(@month)
    @num_days = 30 if [4,6,9,11].include?(@month)
    ( date.leap? ? (@num_days = 29) : (@num_days = 28) ) if @month == 2
    @last_day = @first_day + ( @num_days - 1 )
  else
    raise ArgumentError, "needs Date object as input!"
  end
  
  # returns new Month -instance one Month later than self
  # 
  def next
    return Month.new(@last_day + 1)
  end
  
  # returns a new Month -instance one Month prior to self
  # 
  def previous
    return Month.new((@first_day - 1).to_date)
  end
    
  # returns collection of days as Date -instances of self
  #  
  def days
    arr = []
    @first_day.upto(@last_day) { |date| arr << date }
    arr
  end
    
end

Instance Attribute Details

#date ⇒ Object (readonly)

the initial / regular Date instance



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# File 'lib/date_utils.rb', line 104

def date
  @date
end

#first_day ⇒ Object (readonly)

the first day of the Month -instance



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# File 'lib/date_utils.rb', line 107

def first_day
  @first_day
end

#last_day ⇒ Object (readonly)

the last day of the Month -instance



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# File 'lib/date_utils.rb', line 110

def last_day
  @last_day
end

#month ⇒ Object (readonly)

the Month -number



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# File 'lib/date_utils.rb', line 113

def month
  @month
end

#num_days ⇒ Object (readonly)

the number of days in Month



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# File 'lib/date_utils.rb', line 116

def num_days
  @num_days
end

Instance Method Details

#days ⇒ Object

returns collection of days as Date -instances of self



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# File 'lib/date_utils.rb', line 148

def days
  arr = []
  @first_day.upto(@last_day) { |date| arr << date }
  arr
end

#next ⇒ Object

returns new Month -instance one Month later than self



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# File 'lib/date_utils.rb', line 136

def next
  return Month.new(@last_day + 1)
end

#previous ⇒ Object

returns a new Month -instance one Month prior to self



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# File 'lib/date_utils.rb', line 142

def previous
  return Month.new((@first_day - 1).to_date)
end