Enable blind voting

app/models/event.rb

@@ -82,8 +82,24 @@ class Event < ActiveRecord::Base
     registrations.count < max_attendees
   end
 
-  def voted?(event, user)
-    event.votes.where('user_id = ?', user).first
+  ##
+  # Finds the rating of the user for the event
+  # ====Returns
+  # * +integer+ -> the rating of the user for the event
+  def user_rating(user)
+    (vote = votes.find_by(user: user)) ? vote.rating : 0
+  end
+
+  ##
+  # Checks if the event has votes
+  # If a user is provided, it checks if the event has votes by the user
+  # ====Returns
+  # * +true+ -> If the event has votes (optionally, by the user)
+  # * +false+ -> If the event does not have any votes (optionally, by the user)
+  def voted?(user=nil)
+    return votes.where(user: user).any? if user
+
+    votes.any?
   end
 
   def average_rating

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
   #