custom validation

class MyController
	include One

	def create
		params = {first_name: "lareb", last_name: "nawab", email: "[email protected]", 
					mobile: "8087036184", address_line_1: "2171 Parmar nagar 5", address_line_2: "Fatima Nagar", 
					city: "Pune", state: "Maharashtra", country: "India", zip: "411013"}

		#this will return an array of validation message
		validate(params)
	end


end

module One


  def validate(params)
  	cannot_empty = [:first_name, :last_name, :email]
  	email_validation = [:email]
  	zip_validation = [:zip]

  	error_messages = []

  	cannot_empty.each do |attr|
  		#attr has :first_name, :last_name, :email values
		error_messages << cannot_be_empty(params[attr])
  	end

  	email_validation.each do |attr|
  		#attr has :email value
		error_messages << get_email_validation(params[attr])
  	end

  	zip_validation.each do |attr|
  		#attr has :email value
		error_messages << get_zip_validation(params[attr])
  	end
  end	

  def cannot_be_empty(attr)
  	return "#{attr} can not be blank?" if attr.blank?
  end

  def get_email_validation(attr)
	return "#{attr} can not be blank?" if attr.valid? #copy this valid function to regex email validation
  end

  def get_zip_validation(attr)
  	return "#{attr} can not be blank?" if attr.valid? #must be numeric and min 5 digit long
  end
end