Fix boosted toots from blocked account not being retroactively removed from TL (#14339)

* Fix boosted toots from blocked account not being retroactively removed from TL

Fixes #14301

* Add test for clear_from_timeline

app/lib/feed_manager.rb

@@ -124,9 +124,15 @@ class FeedManager
   end
 
   def clear_from_timeline(account, target_account)
+    # Clear from timeline all statuses from or mentionning target_account
     timeline_key        = key(:home, account.id)
     timeline_status_ids = redis.zrange(timeline_key, 0, -1)
-    target_statuses     = Status.where(id: timeline_status_ids, account: target_account)
+    statuses            = Status.where(id: timeline_status_ids).select(:id, :reblog_of_id, :account_id).to_a
+    reblogged_ids       = Status.where(id: statuses.map(&:reblog_of_id).compact, account: target_account).pluck(:id)
+    with_mentions_ids   = Mention.active.where(status_id: statuses.flat_map { |s| [s.id, s.reblog_of_id] }.compact, account: target_account).pluck(:status_id)
+    target_statuses     = statuses.filter do |status|
+      status.account_id == target_account.id || reblogged_ids.include?(status.reblog_of_id) || with_mentions_ids.include?(status.id) || with_mentions_ids.include?(status.reblog_of_id)
+    end
 
     target_statuses.each do |status|
       unpush_from_home(account, status)

spec/lib/feed_manager_spec.rb

@@ -429,4 +429,29 @@ RSpec.describe FeedManager do
       expect(Redis.current).to have_received(:publish).with("timeline:#{receiver.id}", deletion)
     end
   end
+
+  describe '#clear_from_timeline' do
+    let(:account)          { Fabricate(:account) }
+    let(:followed_account) { Fabricate(:account) }
+    let(:target_account)   { Fabricate(:account) }
+    let(:status_1)         { Fabricate(:status, account: followed_account) }
+    let(:status_2)         { Fabricate(:status, account: target_account) }
+    let(:status_3)         { Fabricate(:status, account: followed_account, mentions: [Fabricate(:mention, account: target_account)]) }
+    let(:status_4)         { Fabricate(:status, mentions: [Fabricate(:mention, account: target_account)]) }
+    let(:status_5)         { Fabricate(:status, account: followed_account, reblog: status_4) }
+    let(:status_6)         { Fabricate(:status, account: followed_account, reblog: status_2) }
+    let(:status_7)         { Fabricate(:status, account: followed_account) }
+
+    before do
+      [status_1, status_3, status_5, status_6, status_7].each do |status|
+        Redis.current.zadd("feed:home:#{account.id}", status.id, status.id)
+      end
+    end
+
+    it 'correctly cleans the timeline' do
+      FeedManager.instance.clear_from_timeline(account, target_account)
+
+      expect(Redis.current.zrange("feed:home:#{account.id}", 0, -1)).to eq [status_1.id.to_s, status_7.id.to_s]
+    end
+  end
 end