gistfile1.rb

require 'csv'

def transform_merge(csv_file)
  CSV.open(@csv_file).read.each do |line|
  end
end

def multiple_merge(inputs)
  errors = []

  inputs.each do |input|
    begin
      merge(input[0], input[1], input[2])
    rescue RuntimeError => e
     errors << e.message
    end
  end

  errors
end

def merge(user1, user2, preferred_email)
  user1.strip!
  user2.strip!

  raise "Email cannot be the same" if (user1 == user2)

  u = User.unscoped.find_by_email(user1)
  u2 = User.unscoped.find_by_email(user2)

  raise "User1 not found" if u.nil?
  raise "User2 not found" if u2.nil?

  if u.alternate_ids.empty?
    primary = u
    victim = u2
  else
    primary = u2
    victim = u
  end

  primary.takeover!(victim)
  primary.update_attribute(:email, preferred_email)
  primary.restore!

  primary.employments.collect { |emp| emp.allstate_network_ids.collect(&:network_id) }.flatten
end