feat: Business hours

Data models and APIs for business hours

ref: #234

app/models/concerns/out_of_offisable.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module OutOfOffisable
+  extend ActiveSupport::Concern
+
+  included do
+    has_many :working_hours, dependent: :destroy
+    after_create :create_default_working_hours
+  end
+
+  def out_of_office?
+    working_hours_enabled? && working_hours.today.closed_now?
+  end
+
+  def working_now?
+    !out_of_office?
+  end
+
+  private
+
+  def create_default_working_hours
+    working_hours.create!(day_of_week: 1, open_hour: 9, open_minutes: 0, close_hour: 17, close_minutes: 0)
+    working_hours.create!(day_of_week: 2, open_hour: 9, open_minutes: 0, close_hour: 17, close_minutes: 0)
+    working_hours.create!(day_of_week: 3, open_hour: 9, open_minutes: 0, close_hour: 17, close_minutes: 0)
+    working_hours.create!(day_of_week: 4, open_hour: 9, open_minutes: 0, close_hour: 17, close_minutes: 0)
+    working_hours.create!(day_of_week: 5, open_hour: 9, open_minutes: 0, close_hour: 17, close_minutes: 0)
+    working_hours.create!(day_of_week: 6, closed_all_day: true)
+    working_hours.create!(day_of_week: 7, closed_all_day: true)
+  end
+end