Enable blind voting

app/models/program.rb

@@ -47,12 +47,58 @@ class Program < ActiveRecord::Base
   accepts_nested_attributes_for :difficulty_levels, allow_destroy: true
 
 #   validates :conference_id, presence: true, uniqueness: true
-  validates :rating, numericality: { greater_than_or_equal_to: 0, less_than_or_equal_to: 10 }
+  validates :rating, numericality: { greater_than_or_equal_to: 0, less_than_or_equal_to: 10, only_integer: true }
+  validate :voting_start_date_before_end_date
+  validate :voting_dates_exist
 
   before_create :create_event_types
   before_create :create_difficulty_levels
   validate :check_languages_format
 
+  ##
+  # Checks if blind_voting is enabled and if voting period is over
+  # ====Returns
+  # * +true+ -> If we can show voting details
+  # * +false+ -> If we cannot show voting details
+  def show_voting?
+    return true unless blind_voting
+
+    Date.today > voting_end_date
+  end
+
+  ##
+  # Checks if we are still in voting period
+  # ====Returns
+  # * +true+ -> If the voting period is not over yet
+  # * +false+ -> If the voting period is over
+  def voting_period?
+    return false unless voting_start_date && voting_end_date
+
+    (voting_start_date.to_datetime..voting_end_date.to_datetime).cover? Time.current
+  end
+
+  ##
+  # Checks if both voting_start_date and voting_end_date are set
+  # ====Returns
+  # Errors when the condition is not true
+  def voting_dates_exist
+    errors.add(:voting_start_date, 'must be set, when blind voting is enabled') if blind_voting && !voting_start_date && !voting_end_date
+
+    errors.add(:voting_end_date, 'must be set, when blind voting is enabled') if blind_voting && !voting_start_date && !voting_end_date
+
+    errors.add(:voting_end_date, 'must be set, when voting_start_date is set') if voting_start_date && !voting_end_date
+
+    errors.add(:voting_start_date, 'must be set, when voting_end_date is set') if voting_end_date && !voting_start_date
+  end
+
+  ##
+  # Checks if voting_start_date is before voting_end_date
+  # ====Returns
+  # Errors when the condition is not true
+  def voting_start_date_before_end_date
+    errors.add(:voting_start_date, 'must be before voting end date') if voting_start_date && voting_end_date && voting_start_date > voting_end_date
+  end
+
   ##
   # Checcks if the program has rating enabled
   #