Class: Feriados::Rules::Easter

Inherits:
Object
  • Object
show all
Defined in:
lib/feriados/rules/easter.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(year) ⇒ Easter

Returns a new instance of Easter.



4
5
6
 
# File 'lib/feriados/rules/easter.rb', line 4

def initialize(year)
  @year = year
end

Class Method Details

.holiday?(date) ⇒ Boolean

Returns:

  • (Boolean) 


28
29
30
31
32
 
# File 'lib/feriados/rules/easter.rb', line 28

def self.holiday?(date)
  easter = Easter.new(date.year)

  easter.date == date
end

Instance Method Details

#date ⇒ Object 



8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/feriados/rules/easter.rb', line 8

def date
  a = year % 19
  b = year / 100
  c = year % 100
  d = b / 4
  e = b % 4
  f = (b + 8) / 25
  g = (b - f + 1) / 3
  h = (19 * a + b - d - g + 15) % 30
  i = c / 4
  k = c % 4
  l = (32 + 2 * e + 2 * i - h - k) % 7
  m = (a + 11 * h + 22 * l) / 451
  result = h + l - 7 * m + 114
  month = result / 31
  day = (result % 31) + 1

  Date.new(year, month, day)
end