Recalculate stats when an import is deleted.

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Prometheus exporter is now not being started when console is being run.
 - Stats will now properly reflect countries and cities visited after importing new points.
 - `GET /api/v1/points will now return correct latitude and longitude values. #1502
+- Deleting an import will now trigger stats recalculation for affected months. #1789
 
 ## Changed
 

app/models/import.rb

@@ -11,6 +11,7 @@ class Import < ApplicationRecord
 
   after_commit -> { Import::ProcessJob.perform_later(id) unless skip_background_processing }, on: :create
   after_commit :remove_attached_file, on: :destroy
+  before_commit :recalculate_stats, on: :destroy, if: -> { points.exists? }
 
   validates :name, presence: true, uniqueness: { scope: :user_id }
   validate :file_size_within_limit, if: -> { user.trial? }
@@ -63,8 +64,14 @@ class Import < ApplicationRecord
   def file_size_within_limit
     return unless file.attached?
 
-    if file.blob.byte_size > 11.megabytes
+    return unless file.blob.byte_size > 11.megabytes
-      errors.add(:file, 'is too large. Trial users can only upload files up to 10MB.')
+
+    errors.add(:file, 'is too large. Trial users can only upload files up to 10MB.')
+  end
+
+  def recalculate_stats
+    years_and_months_tracked.each do |year, month|
+      Stats::CalculatingJob.perform_later(user.id, year, month)
     end
   end
 end

spec/models/import_spec.rb

@@ -31,7 +31,7 @@ RSpec.describe Import, type: :model do
 
     describe 'file size validation' do
       context 'when user is a trial user' do
-        let(:user) do 
+        let(:user) do
           user = create(:user)
           user.update!(status: :trial)
           user
@@ -116,4 +116,28 @@ RSpec.describe Import, type: :model do
       end
     end
   end
+
+  describe '#recalculate_stats' do
+    let(:import) { create(:import, user:) }
+    let!(:point1) { create(:point, import:, user:, timestamp: Time.zone.local(2024, 11, 15).to_i) }
+    let!(:point2) { create(:point, import:, user:, timestamp: Time.zone.local(2024, 12, 5).to_i) }
+
+    it 'enqueues stats calculation jobs for each tracked month' do
+      expect do
+        import.send(:recalculate_stats)
+      end.to have_enqueued_job(Stats::CalculatingJob)
+        .with(user.id, 2024, 11)
+        .and have_enqueued_job(Stats::CalculatingJob).with(user.id, 2024, 12)
+    end
+
+    context 'when import has no points' do
+      let(:empty_import) { create(:import, user:) }
+
+      it 'does not enqueue any jobs' do
+        expect do
+          empty_import.send(:recalculate_stats)
+        end.not_to have_enqueued_job(Stats::CalculatingJob)
+      end
+    end
+  end
 end