adds residence verification

app/models/residence.rb

@@ -0,0 +1,45 @@
+class Residence
+  include ActiveModel::Model
+  include ActiveModel::Dates
+
+  attr_accessor :user, :document_number, :document_type, :date_of_birth, :postal_code
+
+  validates_presence_of :document_number
+  validates_presence_of :document_type
+  validates_presence_of :date_of_birth
+  validates_presence_of :postal_code
+
+  validates :postal_code, length: { is: 5 }
+
+  validate :residence_in_madrid
+  validate :document_number_uniqueness
+
+  def initialize(attrs={})
+    self.date_of_birth = parse_date('date_of_birth', attrs)
+    attrs = remove_date('date_of_birth', attrs)
+    super
+  end
+
+  def save
+    return false unless valid?
+    user.update(document_number:       document_number,
+                document_type:         document_type,
+                residence_verified_at: Time.now)
+  end
+
+  def document_number_uniqueness
+    errors.add(:document_number, "Already in use") if User.where(document_number: document_number).any?
+  end
+
+  def residence_in_madrid
+    return if errors.any?
+
+    self.date_of_birth = date_to_string(date_of_birth)
+
+    residency = UserApi.new(self)
+    errors.add(:residence_in_madrid, false) unless residency.valid?
+
+    self.date_of_birth = string_to_date(date_of_birth)
+  end
+
+end