egn.rb in egn-0.2.0

- old
+ new
@@ -1,109 +1,22 @@
-require "egn/version"
 require "date"
 
+require "egn/generator"
+require "egn/parser"
+require "egn/validator"
+require "egn/version"
+
 module Egn
-  PARITY_WEIGHTS = [2,4,8,5,10,9,7,3,6]
 
-  module Generator
-    def self.egn
-      date = time_rand
-      year = date.year
-      mon = date.month
-      day = date.day
-
-      cent = year - (year % 100)
-      sex = Random.rand(1..2)
-
-      if cent == 1800
-        mon += 20
-      elsif cent == 2000
-        mon += 40
-      end
-
-      region = Random.rand(0..999)
-
-      if sex == 1 && (region %2 != 0)
-        region -= 1
-      elsif sex == 2 && (region % 2 == 0)
-        region += 1
-      end
-
-      final_year = year - cent
-      egn = final_year.to_s.rjust(2, '0') + mon.to_s.rjust(2, '0') + day.to_s.rjust(2,'0') + region.to_s.rjust(3,'0')
-
-      return egn + egn_checksum(egn).to_s
-    end
-
-    def self.egn_checksum(egn)
-      sum = egn.split('').map(&:to_i).zip(PARITY_WEIGHTS).map { |n| n.reduce(:*) }.reduce(:+)
-
-      rest = sum % 11
-      rest < 10 ? rest : 0
-    end
-
-    def self.time_rand(from = 0.0, to = Time.now)
-      Time.at(from + rand * (to.to_f - from.to_f))
-    end
-
+  def self.generate
+    Generator.egn
   end
 
-  module Validator
-    def self.egn(egn)
-      return false unless egn.length == 10
-
-      year, month, day = egn.scan(/.{1,2}/)
-      month = month.to_i
-      day = day.to_i
-
-      case month
-      when (1..12)
-        year = "19#{year}"
-      when (21..32)
-        month -= 20
-        year = "20#{year}"
-      when (41..52)
-        month -= 40
-        year = "18#{year}"
-      end
-      year = year.to_i
-
-      return false unless Date.valid_date? year, month, day
-
-      checksum = Generator.egn_checksum egn[0,9]
-
-      checksum == egn[9].to_i
-    end
-
+  def self.validate(egn)
+    Validator.egn(egn)
   end
 
-  class Parser
-
-    def initialize(egn)
-      return false unless egn.length == 10
-
-      @year, @month, @day = egn.scan(/.{1,2}/)
-      @month = @month.to_i
-      @day = @day.to_i
-
-      case @month
-      when (1..12)
-        @year = "19#{@year}"
-      when (21..32)
-        @month -= 20
-        @year = "20#{@year}"
-      when (41..52)
-        @month -= 40
-        @year = "18#{@year}"
-      end
-      @year = @year.to_i
-
-      raise ArgumentError, "invalid date" unless Date.valid_date? @year, @month, @day
-    end
-
-    def birth_date
-      Date.parse("#{@year}-#{@month}-#{@day}")
-    end
-
+  def self.parse(egn)
+    Parser.new(egn)
   end
 
 end