Add exercise feedback page for pair programming study

app/models/exercise.rb

@@ -25,6 +25,7 @@ class Exercise < ApplicationRecord
   has_many :tags, through: :exercise_tags
   accepts_nested_attributes_for :exercise_tags
   has_many :user_exercise_feedbacks
+  has_many :pair_programming_exercise_feedbacks
   has_many :exercise_tips
   has_many :tips, through: :exercise_tips
 
@@ -590,6 +591,8 @@ class Exercise < ApplicationRecord
   private :valid_submission_deadlines?
 
   def needs_more_feedback?(submission)
+    return false if PairProgramming23Study.experiment_course?(submission.study_group_id)
+
     if submission.normalized_score.to_d == BigDecimal('1.0')
       user_exercise_feedbacks.final.size <= MAX_GROUP_EXERCISE_FEEDBACKS
     else

app/models/pair_programming_exercise_feedback.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class PairProgrammingExerciseFeedback < ApplicationRecord
+  include Creation
+
+  belongs_to :exercise
+  belongs_to :submission
+  belongs_to :study_group
+  belongs_to :programming_group, optional: true
+  has_one :execution_environment, through: :exercise
+
+  scope :intermediate, -> { where.not(normalized_score: 1.00) }
+  scope :final, -> { where(normalized_score: 1.00) }
+
+  def to_s
+    'Pair Programming Exercise Feedback'
+  end
+end

app/models/programming_group.rb

@@ -11,6 +11,7 @@ class ProgrammingGroup < ApplicationRecord
   has_many :runners, as: :contributor, dependent: :destroy
   has_many :events
   has_many :events_synchronized_editor, class_name: 'Event::SynchronizedEditor'
+  has_many :pair_programming_exercise_feedbacks
   belongs_to :exercise
 
   validate :min_group_size

app/models/study_group.rb

@@ -11,6 +11,7 @@ class StudyGroup < ApplicationRecord
   has_many :lti_parameters, dependent: :delete_all
   has_many :events
   has_many :events_synchronized_editor, class_name: 'Event::SynchronizedEditor'
+  has_many :pair_programming_exercise_feedbacks
   belongs_to :consumer
 
   def users

app/models/submission.rb

@@ -17,6 +17,8 @@ class Submission < ApplicationRecord
   has_many :testruns
   has_many :structured_errors, dependent: :destroy
   has_many :comments, through: :files
+  has_one :user_exercise_feedback
+  has_one :pair_programming_exercise_feedback
 
   belongs_to :external_users, lambda {
                                 where(submissions: {contributor_type: 'ExternalUser'}).includes(:submissions)
@@ -118,12 +120,18 @@ class Submission < ApplicationRecord
   end
 
   def redirect_to_feedback?
+    return false if PairProgramming23Study.experiment_course?(study_group_id)
+
     # Redirect 10% of users to the exercise feedback page. Ensure, that always the same
     # users get redirected per exercise and different users for different exercises. If
     # desired, the number of feedbacks can be limited with exercise.needs_more_feedback?(submission)
     (contributor_id + exercise.created_at.to_i) % 10 == 1
   end
 
+  def redirect_to_survey?
+    cause == 'submit' && pair_programming_exercise_feedback.blank? && PairProgramming23Study.experiment_course?(study_group_id)
+  end
+
   def own_unsolved_rfc(user)
     Pundit.policy_scope(user, RequestForComment).joins(:submission).where(submission: {contributor:}).unsolved.find_by(exercise:)
   end