Fix some notifications not being deleted on poll/status deletion (#15402)

* Fix deleting polls not deleting notifications

* Fix fav notification deletion when deleting a toot

* Refactor DeleteAccountService spec

* Add DeleteAccountService tests for other associations and notifications

* Add favourite handling spec in status removal

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

4 files changed, 76 insertions, 52 deletions

diff --git a/app/models/status.rb b/app/models/status.rb
index f1b3b75ce..96d90e1c2 100644
--- a/app/models/status.rb
+++ b/app/models/status.rb
@@ -56,7 +56,7 @@ class Status < ApplicationRecord
   belongs_to :thread, foreign_key: 'in_reply_to_id', class_name: 'Status', inverse_of: :replies, optional: true
   belongs_to :reblog, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblogs, optional: true
 
-  has_many :favourites, inverse_of: :status, dependent: :delete_all
+  has_many :favourites, inverse_of: :status, dependent: :destroy
   has_many :bookmarks, inverse_of: :status, dependent: :destroy
   has_many :reblogs, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblog, dependent: :destroy
   has_many :replies, foreign_key: 'in_reply_to_id', class_name: 'Status', inverse_of: :thread
diff --git a/app/services/delete_account_service.rb b/app/services/delete_account_service.rb
index fe9b30b17..fa834e775 100644
--- a/app/services/delete_account_service.rb
+++ b/app/services/delete_account_service.rb
@@ -123,7 +123,9 @@ class DeleteAccountService < BaseService
       next if @options[:reserve_username] && reported_status_ids.include?(poll.status_id)
 
       # We can safely delete the poll rather than destroy it, as any non-reported
-      # status should have been deleted already
+      # status should have been deleted already, as long as we take care of
+      # notifications.
+      Notification.where(poll: poll).delete_all
       poll.delete
     end
 
diff --git a/spec/services/delete_account_service_spec.rb b/spec/services/delete_account_service_spec.rb
index d208b25b8..cd7d32d59 100644
--- a/spec/services/delete_account_service_spec.rb
+++ b/spec/services/delete_account_service_spec.rb
@@ -1,28 +1,31 @@
 require 'rails_helper'
 
 RSpec.describe DeleteAccountService, type: :service do
-  describe '#call on local account' do
-    before do
-      stub_request(:post, "https://alice.com/inbox").to_return(status: 201)
-      stub_request(:post, "https://bob.com/inbox").to_return(status: 201)
-    end
+  shared_examples 'common behavior' do
+    let!(:status) { Fabricate(:status, account: account) }
+    let!(:mention) { Fabricate(:mention, account: local_follower) }
+    let!(:status_with_mention) { Fabricate(:status, account: account, mentions: [mention]) }
+    let!(:media_attachment) { Fabricate(:media_attachment, account: account) }
+    let!(:notification) { Fabricate(:notification, account: account) }
+    let!(:favourite) { Fabricate(:favourite, account: account, status: Fabricate(:status, account: local_follower)) }
+    let!(:poll) { Fabricate(:poll, account: account) }
+    let!(:poll_vote) { Fabricate(:poll_vote, account: local_follower, poll: poll) }
+
+    let!(:active_relationship) { Fabricate(:follow, account: account, target_account: local_follower) }
+    let!(:passive_relationship) { Fabricate(:follow, account: local_follower, target_account: account) }
+    let!(:endorsement) { Fabricate(:account_pin, account: local_follower, target_account: account) }
+
+    let!(:mention_notification) { Fabricate(:notification, account: local_follower, activity: mention, type: :mention) }
+    let!(:status_notification) { Fabricate(:notification, account: local_follower, activity: status, type: :status) }
+    let!(:poll_notification) { Fabricate(:notification, account: local_follower, activity: poll, type: :poll) }
+    let!(:favourite_notification) { Fabricate(:notification, account: local_follower, activity: favourite, type: :favourite) }
+    let!(:follow_notification) { Fabricate(:notification, account: local_follower, activity: active_relationship, type: :follow) }
 
     subject do
       -> { described_class.new.call(account) }
     end
 
-    let!(:account) { Fabricate(:account) }
-    let!(:status) { Fabricate(:status, account: account) }
-    let!(:media_attachment) { Fabricate(:media_attachment, account: account) }
-    let!(:notification) { Fabricate(:notification, account: account) }
-    let!(:favourite) { Fabricate(:favourite, account: account) }
-    let!(:active_relationship) { Fabricate(:follow, account: account) }
-    let!(:passive_relationship) { Fabricate(:follow, target_account: account) }
-    let!(:remote_alice) { Fabricate(:account, inbox_url: 'https://alice.com/inbox', protocol: :activitypub) }
-    let!(:remote_bob) { Fabricate(:account, inbox_url: 'https://bob.com/inbox', protocol: :activitypub) }
-    let!(:endorsment) { Fabricate(:account_pin, account: passive_relationship.account, target_account: account) }
-
-    it 'deletes associated records' do
+    it 'deletes associated owned records' do
       is_expected.to change {
         [
           account.statuses,
@@ -31,54 +34,63 @@ RSpec.describe DeleteAccountService, type: :service do
           account.favourites,
           account.active_relationships,
           account.passive_relationships,
+          account.polls,
+        ].map(&:count)
+      }.from([2, 1, 1, 1, 1, 1, 1]).to([0, 0, 0, 0, 0, 0, 0])
+    end
+
+    it 'deletes associated target records' do
+      is_expected.to change {
+        [
           AccountPin.where(target_account: account),
         ].map(&:count)
-      }.from([1, 1, 1, 1, 1, 1, 1]).to([0, 0, 0, 0, 0, 0, 0])
+      }.from([1]).to([0])
     end
 
-    it 'sends a delete actor activity to all known inboxes' do
-      subject.call
-      expect(a_request(:post, "https://alice.com/inbox")).to have_been_made.once
-      expect(a_request(:post, "https://bob.com/inbox")).to have_been_made.once
+    it 'deletes associated target notifications' do
+      is_expected.to change {
+        [
+          'poll', 'favourite', 'status', 'mention', 'follow'
+        ].map { |type| Notification.where(type: type).count }
+      }.from([1, 1, 1, 1, 1]).to([0, 0, 0, 0, 0])
     end
   end
 
-  describe '#call on remote account' do
+  describe '#call on local account' do
     before do
       stub_request(:post, "https://alice.com/inbox").to_return(status: 201)
       stub_request(:post, "https://bob.com/inbox").to_return(status: 201)
     end
 
-    subject do
-      -> { described_class.new.call(remote_bob) }
-    end
-
-    let!(:account) { Fabricate(:account) }
     let!(:remote_alice) { Fabricate(:account, inbox_url: 'https://alice.com/inbox', protocol: :activitypub) }
     let!(:remote_bob) { Fabricate(:account, inbox_url: 'https://bob.com/inbox', protocol: :activitypub) }
-    let!(:status) { Fabricate(:status, account: remote_bob) }
-    let!(:media_attachment) { Fabricate(:media_attachment, account: remote_bob) }
-    let!(:notification) { Fabricate(:notification, account: remote_bob) }
-    let!(:favourite) { Fabricate(:favourite, account: remote_bob) }
-    let!(:active_relationship) { Fabricate(:follow, account: remote_bob, target_account: account) }
-    let!(:passive_relationship) { Fabricate(:follow, target_account: remote_bob) }
 
-    it 'deletes associated records' do
-      is_expected.to change {
-        [
-          remote_bob.statuses,
-          remote_bob.media_attachments,
-          remote_bob.notifications,
-          remote_bob.favourites,
-          remote_bob.active_relationships,
-          remote_bob.passive_relationships,
-        ].map(&:count)
-      }.from([1, 1, 1, 1, 1, 1]).to([0, 0, 0, 0, 0, 0])
+    include_examples 'common behavior' do
+      let!(:account) { Fabricate(:account) }
+      let!(:local_follower) { Fabricate(:account) }
+
+      it 'sends a delete actor activity to all known inboxes' do
+        subject.call
+        expect(a_request(:post, "https://alice.com/inbox")).to have_been_made.once
+        expect(a_request(:post, "https://bob.com/inbox")).to have_been_made.once
+      end
+    end
+  end
+
+  describe '#call on remote account' do
+    before do
+      stub_request(:post, "https://alice.com/inbox").to_return(status: 201)
+      stub_request(:post, "https://bob.com/inbox").to_return(status: 201)
     end
 
-    it 'sends a reject follow to follwer inboxes' do
-      subject.call
-      expect(a_request(:post, remote_bob.inbox_url)).to have_been_made.once
+    include_examples 'common behavior' do
+      let!(:account) { Fabricate(:account, inbox_url: 'https://bob.com/inbox', protocol: :activitypub) }
+      let!(:local_follower) { Fabricate(:account) }
+
+      it 'sends a reject follow to follwer inboxes' do
+        subject.call
+        expect(a_request(:post, account.inbox_url)).to have_been_made.once
+      end
     end
   end
 end
diff --git a/spec/services/remove_status_service_spec.rb b/spec/services/remove_status_service_spec.rb
index 06676ec45..7ce75b2c7 100644
--- a/spec/services/remove_status_service_spec.rb
+++ b/spec/services/remove_status_service_spec.rb
@@ -3,7 +3,7 @@ require 'rails_helper'
 RSpec.describe RemoveStatusService, type: :service do
   subject { RemoveStatusService.new }
 
-  let!(:alice)  { Fabricate(:account) }
+  let!(:alice)  { Fabricate(:account, user: Fabricate(:user)) }
   let!(:bob)    { Fabricate(:account, username: 'bob', domain: 'example.com', salmon_url: 'http://example.com/salmon') }
   let!(:jeff)   { Fabricate(:account) }
   let!(:hank)   { Fabricate(:account, username: 'hank', protocol: :activitypub, domain: 'example.com', inbox_url: 'http://example.com/inbox') }
@@ -17,23 +17,33 @@ RSpec.describe RemoveStatusService, type: :service do
     hank.follow!(alice)
 
     @status = PostStatusService.new.call(alice, text: 'Hello @bob@example.com')
+    FavouriteService.new.call(jeff, @status)
     Fabricate(:status, account: bill, reblog: @status, uri: 'hoge')
-    subject.call(@status)
   end
 
   it 'removes status from author\'s home feed' do
+    subject.call(@status)
     expect(HomeFeed.new(alice).get(10)).to_not include(@status.id)
   end
 
   it 'removes status from local follower\'s home feed' do
+    subject.call(@status)
     expect(HomeFeed.new(jeff).get(10)).to_not include(@status.id)
   end
 
   it 'sends delete activity to followers' do
+    subject.call(@status)
     expect(a_request(:post, 'http://example.com/inbox')).to have_been_made.twice
   end
 
   it 'sends delete activity to rebloggers' do
+    subject.call(@status)
     expect(a_request(:post, 'http://example2.com/inbox')).to have_been_made
   end
+
+  it 'remove status from notifications' do
+    expect { subject.call(@status) }.to change {
+      Notification.where(activity_type: 'Favourite', from_account: jeff, account: alice).count
+    }.from(1).to(0)
+  end
 end