418-ssn.rb

SSN_PATTERN = /^(?<gender>[12])\s(?<year>\d{2})\s(?<month>\d{2})\s(?<zip>\d{2})\s(?<digits>\d{3}\s\d{3})\s(?<key>\d{2})/

# define a method named french_ssn_info; takes one string parameter
# see if our ssn is a match for our pattern

# check IF we have a valid key
# (97 - rest of the numbers besides 46) % 97 MUST BE EQUAL TO key

# 1 == man, 2 == woman; check & store the gender
# return the year of birth (19) & store the full birth year

# convert month numbers to month names (require 'date')
# read our YAML file ('require yaml'); extract correct zip from yaml file -> LOOKS LIKE A HASH

# create the end string (lots of interpolation)

require 'date'
require 'yaml'

require 'pry'
# binding.pry

# MONTHNAMES = [0, January, February, March...][12]

def french_ssn_info(ssn)
  match_ssn = ssn.match(SSN_PATTERN)
  if match_ssn && valid_key?(ssn, match_ssn)
    gender = gender(match_ssn)
    year = "19#{match_ssn[:year]}"
    month = Date::MONTHNAMES[match_ssn[:month].to_i]
    zip = zip_yaml(match_ssn)
    puts "a #{gender}, born in #{month}, #{year} in #{zip}"
  else
    puts "You are INVALID"
  end
end

def valid_key?(ssn, match_ssn)
  (97 - ssn.gsub(' ', '')[0..-3].to_i) % 97 == match_ssn[:key].to_i
end

def gender(match_ssn)
  match_ssn[:gender] == "1" ? 'male' : 'female'
end

def zip_yaml(match_ssn)
  YAML.load_file('data/french_departments.yml')[match_ssn[:zip]]
end

french_ssn_info('1 84 12 76 451 089 46')
french_ssn_info('1 84 46')