Add submission deadline to exercises and allow teachers to view their submissions

app/models/submission.rb

@@ -15,11 +15,22 @@ class Submission < ApplicationRecord
   has_many :structured_errors
   has_many :comments, through: :files
 
+  belongs_to :external_users, -> { where(submissions: {user_type: 'ExternalUser'}).includes(:submissions) }, foreign_key: :user_id, class_name: 'ExternalUser', optional: true
+  belongs_to :internal_users, -> { where(submissions: {user_type: 'InternalUser'}).includes(:submissions) }, foreign_key: :user_id, class_name: 'InternalUser', optional: true
+
   delegate :execution_environment, to: :exercise
 
   scope :final, -> { where(cause: 'submit') }
   scope :intermediate, -> { where.not(cause: 'submit') }
 
+  scope :before_deadline, -> { joins(:exercise).where('submissions.updated_at <= exercises.submission_deadline OR exercises.submission_deadline IS NULL') }
+  scope :within_grace_period, -> { joins(:exercise).where('(submissions.updated_at > exercises.submission_deadline) AND (submissions.updated_at <= exercises.late_submission_deadline OR exercises.late_submission_deadline IS NULL)') }
+  scope :after_late_deadline, -> { joins(:exercise).where('submissions.updated_at > exercises.late_submission_deadline') }
+
+  scope :latest, -> { order(updated_at: :desc).limit(1) }
+
+  scope :in_study_group_of, ->(user) { where(study_group_id: user.study_groups) unless user.admin? }
+
   validates :cause, inclusion: {in: CAUSES}
   validates :exercise_id, presence: true
 
@@ -29,6 +40,7 @@ class Submission < ApplicationRecord
   def build_files_hash(files, attribute)
     files.map(&attribute.to_proc).zip(files).to_h
   end
+
   private :build_files_hash
 
   def collect_files
@@ -42,7 +54,7 @@ class Submission < ApplicationRecord
   end
 
   def normalized_score
-    ::NewRelic::Agent.add_custom_attributes({ unnormalized_score: score })
+    ::NewRelic::Agent.add_custom_attributes({unnormalized_score: score})
     if !score.nil? && !exercise.maximum_score.nil? && (exercise.maximum_score > 0)
       score / exercise.maximum_score
     else
@@ -62,6 +74,32 @@ class Submission < ApplicationRecord
     Submission.model_name.human
   end
 
+  def before_deadline?
+    if exercise.submission_deadline.present?
+      updated_at <= exercise.submission_deadline
+    else
+      false
+    end
+  end
+
+  def within_grace_period?
+    if exercise.submission_deadline.present? && exercise.late_submission_deadline.present?
+      updated_at > exercise.submission_deadline && updated_at <= exercise.late_submission_deadline
+    else
+      false
+    end
+  end
+
+  def after_late_deadline?
+    if exercise.late_submission_deadline.present?
+      updated_at > exercise.late_submission_deadline
+    elsif exercise.submission_deadline.present?
+      updated_at > exercise.submission_deadline
+    else
+      false
+    end
+  end
+
   def redirect_to_feedback?
     ((user_id + exercise.created_at.to_i) % 10 == 1) && exercise.needs_more_feedback?
   end
@@ -71,6 +109,6 @@ class Submission < ApplicationRecord
   end
 
   def unsolved_rfc
-    RequestForComment.unsolved.where(exercise_id: exercise).where.not(question: nil).where(created_at: OLDEST_RFC_TO_SHOW.ago..Time.current).order("RANDOM()").find { | rfc_element |( (rfc_element.comments_count < MAX_COMMENTS_ON_RECOMMENDED_RFC) && (!rfc_element.question.empty?)) }
+    RequestForComment.unsolved.where(exercise_id: exercise).where.not(question: nil).where(created_at: OLDEST_RFC_TO_SHOW.ago..Time.current).order("RANDOM()").find { |rfc_element| ((rfc_element.comments_count < MAX_COMMENTS_ON_RECOMMENDED_RFC) && (!rfc_element.question.empty?)) }
   end
 end