Create AdminNotification model, spec and factory

app/models/admin_notification.rb

@@ -0,0 +1,44 @@
+class AdminNotification < ActiveRecord::Base
+  include Notifiable
+
+  validates :title, presence: true
+  validates :body, presence: true
+  validates :segment_recipient, presence: true
+  validate :validate_segment_recipient
+
+  before_validation :complete_link_url
+
+  def list_of_recipients
+    UserSegments.send(segment_recipient) if valid_segment_recipient?
+  end
+
+  def valid_segment_recipient?
+    segment_recipient && UserSegments.respond_to?(segment_recipient)
+  end
+
+  def draft?
+    sent_at.nil?
+  end
+
+  def list_of_recipients_count
+    list_of_recipients.try(:count) || 0
+  end
+
+  def deliver
+    list_of_recipients.each { |user| Notification.add(user, self) }
+    self.update(sent_at: Time.current, recipients_count: list_of_recipients.count)
+  end
+
+  private
+
+  def validate_segment_recipient
+    errors.add(:segment_recipient, :invalid) unless valid_segment_recipient?
+  end
+
+  def complete_link_url
+    return unless link.present?
+    unless self.link[/\Ahttp:\/\//] || self.link[/\Ahttps:\/\//]
+      self.link = "http://#{self.link}"
+    end
+  end
+end