Initial commit

app/models/activity.rb

@@ -0,0 +1,52 @@
+class Activity < ApplicationRecord
+  RESULTS = %w[succeed failed denied].freeze
+  CATEGORIES = %w[admin user].freeze
+
+  belongs_to :user
+  has_one :target, primary_key: :target_uid, foreign_key: :uid, class_name: 'User'
+
+  validates :user_ip, presence: true, allow_blank: false
+  validates :user_agent, presence: true, trusty_agent: true
+  validates :topic, presence: true
+  validates :result, presence: true, inclusion: { in: RESULTS }
+  validates :category, presence: true, inclusion: { in: CATEGORIES }
+  validate :target_user
+
+  # this method allows to use all the methods of ::Browser module (platofrm, modern?, version etc)
+  def browser
+    Browser.new(user_agent)
+  end
+
+  private
+
+  def target_user
+    errors.add(:target_uid, :invalid) if target_uid.present? && User.where(uid: target_uid).empty?
+    errors.add(:target_uid, :not_allowed) if target_uid.present? && category.present? && category == 'user'
+  end
+
+  def readonly?
+    !new_record?
+  end
+end
+
+# == Schema Information
+#
+# Table name: activities
+#
+#  id         :bigint           not null, primary key
+#  user_id    :bigint           not null
+#  target_uid :string(255)
+#  category   :string(255)
+#  user_ip    :string(255)      not null
+#  user_agent :string(255)      not null
+#  topic      :string(255)      not null
+#  action     :string(255)      not null
+#  result     :string(255)      not null
+#  data       :text(65535)
+#  created_at :datetime
+#
+# Indexes
+#
+#  index_activities_on_target_uid  (target_uid)
+#  index_activities_on_user_id     (user_id)
+#