bug: resolve false positive "oops" redirect

app/controllers/candidate_controller.rb

@@ -45,6 +45,7 @@ class CandidateController < ApplicationController
     end
 
     def send_to_oops
+      redirect_to welcome_path and return if current_candidate && current_candidate.stale?
       redirect_to oops_path if current_candidate
     end
 end

app/models/candidate.rb

@@ -48,6 +48,17 @@ class Candidate < ApplicationRecord
     answers.where(submitted: true)
   end
 
+  def last_answered_at
+    return Time.current unless submitted_answers.count.positive?
+    submitted_answers.order(updated_at: :desc).first.updated_at
+  end
+
+  def stale?
+    return true unless answers.count.positive?
+    minutes_since_answered = (Time.current.minus_with_coercion(last_answered_at) / 60).round
+    minutes_since_answered > 45
+  end
+
   def answered_questions
     answers.where.not(answer: nil)
            .where("answers.answer not like '%later:%'")

test/models/candidate_test.rb

@@ -34,4 +34,23 @@ class CandidateTest < ActiveSupport::TestCase
     candidate.build_reviews
     assert_equal 3, candidate.votes.count
   end
+
+  test 'can get last answer timestamp' do
+    candidate = candidates(:roy)
+    roy_last = answers(:roy2).updated_at
+
+    assert_equal roy_last, candidate.last_answered_at
+  end
+
+  test 'gillian is stale with no answers' do
+    candidate = candidates(:gillian)
+
+    assert candidate.stale?
+  end
+
+  test 'roy is stale with answers' do
+    candidate = candidates(:roy)
+
+    assert candidate.stale?
+  end
 end