Purge unsubmitted journey sessions

Now we only create a claim once the claimant has completed the journey
we need to update the purge job to work on journey sessions rather than
claims as all claims are submitted claims.

app/jobs/purge_unsubmitted_claims_job.rb

@@ -5,13 +5,13 @@ class PurgeUnsubmittedClaimsJob < CronJob
   self.cron_expression = "0 0 * * *"
 
   def perform
-    Rails.logger.info "Purging #{old_unsubmitted_claims.count} old and unsubmitted claims from the database"
-    old_unsubmitted_claims.destroy_all
+    Rails.logger.info "Purging #{old_unsubmitted_journeys.count} old and unsubmitted journeys from the database"
+    old_unsubmitted_journeys.destroy_all
   end
 
   private
 
-  def old_unsubmitted_claims
-    Claim.unsubmitted.where("updated_at < ?", 24.hours.ago)
+  def old_unsubmitted_journeys
+    Journeys::Session.purgeable
   end
 end

app/models/journeys/session.rb

@@ -2,6 +2,8 @@ module Journeys
   class Session < ApplicationRecord
     self.abstract_class = true
 
+    self.table_name = "journeys_sessions"
+
     has_one :claim,
       dependent: :nullify,
       inverse_of: :journey_session,
@@ -11,6 +13,12 @@ class Session < ApplicationRecord
       presence: true,
       inclusion: {in: Journeys.all_routing_names}
 
+    scope :unsubmitted, -> { where.missing(:claim) }
+
+    scope :purgeable, -> do
+      unsubmitted.where(journeys_sessions: { updated_at: ..24.hours.ago })
+    end
+
     def submitted?
       claim.present?
     end

spec/jobs/purge_unsubmitted_claims_job_spec.rb

@@ -6,17 +6,37 @@
     let(:four_hours_ago) { 4.hours.ago }
 
     it "destroys any unsubmitted claims that have not been updated in the last 24 hours" do
-      expired_unsubmitted_claim = create(:claim, updated_at: over_24_hours_ago)
-      active_unsubmitted_claim = create(:claim, updated_at: four_hours_ago)
+      submitted_journeys = []
+      unsubmitted_fresh_journeys = []
+      unsubmitted_expired_journeys = []
 
-      old_submitted_claim = create(:claim, :submitted, updated_at: over_24_hours_ago)
+      Journeys::JOURNEYS.each do |journey|
+        submitted_journeys << journey::Session.create!(
+          journey: journey::ROUTING_NAME,
+          claim: create(:claim),
+          updated_at: over_24_hours_ago
+        )
+
+        unsubmitted_fresh_journeys << journey::Session.create!(
+          journey: journey::ROUTING_NAME,
+          updated_at: four_hours_ago
+        )
+
+        unsubmitted_expired_journeys << journey::Session.create!(
+          journey: journey::ROUTING_NAME,
+          updated_at: over_24_hours_ago
+        )
+      end
 
       PurgeUnsubmittedClaimsJob.new.perform
 
-      expect(Claim.exists?(expired_unsubmitted_claim.id)).to eq false
+      expect(submitted_journeys.each(&:reload)).to all be_persisted
+
+      expect(unsubmitted_fresh_journeys.each(&:reload)).to all be_persisted
 
-      expect(Claim.exists?(old_submitted_claim.id)).to eq true
-      expect(Claim.exists?(active_unsubmitted_claim.id)).to eq true
+      expect(
+        Journeys::Session.where(id: unsubmitted_expired_journeys.map(&:id))
+      ).to be_empty
     end
   end
 end