CSV In, CSV Out

serialization.rb

require 'csv'
require 'date'

FILENAME = "people.csv"
NEW_FILE = "new_people.csv"

class Person
  attr_reader :id, :first_name, :last_name, :email, :phone, :created_at
  # id,first_name,last_name,email,phone,created_at

  def initialize(person_info)
    default_options = {
      "created_at" => DateTime.now
    }

    options = person_info.merge(default_options)

    @id = options["id"]
    @first_name = options["first_name"]
    @last_name = options["last_name"]
    @email = options["email"]
    @phone = options["phone"]
    @created_at = options["created_at"]
  end

  def to_array
    [@id, @first_name, @last_name, @email, @phone, @created_at]
  end
end

class PersonParser
  def initialize(filename)
    @people = []
    CSV.foreach(filename, :headers => :first_row) do |row|
      @people << Person.new(row.to_hash)
    end
  end

  def people
    @people
  end

  # person_parse.add_person({:id => 2, :first_name => "Abi"})
  def add_person(new_person)
    @people << new_person
  end

  def save
    CSV.open(NEW_FILE, "wb", :headers => :first_row) do |csv|
      @people.each do |person|
        csv << person.to_array
      end
    end
  end
end

parser = PersonParser.new(FILENAME)
puts parser.people

new_person = {
  "id" => 201, 
  "first_name" => "Bill",
  "last_name" => "Hicks",
  "email" => "bh@gmail.com",
  "phone" => "415-708-9256"
}


parser.add_person Person.new(new_person)
parser.save