[performance] rewrite timelines to rely on new timeline cache type (#3941)

* start work rewriting timeline cache type

* further work rewriting timeline caching

* more work integration new timeline code

* remove old code

* add local timeline, fix up merge conflicts

* remove old use of go-bytes

* implement new timeline code into more areas of codebase, pull in latest go-mangler, go-mutexes, go-structr

* remove old timeline package, add local timeline cache

* remove references to old timeline types that needed starting up in tests

* start adding page validation

* fix test-identified timeline cache package issues

* fix up more tests, fix missing required changes, etc

* add exclusion for test.out in gitignore

* clarify some things better in code comments

* tweak cache size limits

* fix list timeline cache fetching

* further list timeline fixes

* linter, ssssssssshhhhhhhhhhhh please

* fix linter hints

* reslice the output if it's beyond length of 'lim'

* remove old timeline initialization code, bump go-structr to v0.9.4

* continued from previous commit

* improved code comments

* don't allow multiple entries for BoostOfID values to prevent repeated boosts of same boosts

* finish writing more code comments

* some variable renaming, for ease of following

* change the way we update lo,hi paging values during timeline load

* improved code comments for updated / returned lo , hi paging values

* finish writing code comments for the StatusTimeline{} type itself

* fill in more code comments

* update go-structr version to latest with changed timeline unique indexing logic

* have a local and public timeline *per user*

* rewrite calls to public / local timeline calls

* remove the zero length check, as lo, hi values might still be set

* simplify timeline cache loading, fix lo/hi returns, fix timeline invalidation side-effects missing for some federated actions

* swap the lo, hi values 🤦

* add (now) missing slice reverse of tag timeline statuses when paging ASC

* remove local / public caches (is out of scope for this work), share more timeline code

* remove unnecessary change

* again, remove more unused code

* remove unused function to appease the linter

* move boost checking to prepare function

* fix use of timeline.lastOrder, fix incorrect range functions used

* remove comments for repeat code

* remove the boost logic from prepare function

* do a maximum of 5 loads, not 10

* add repeat boost filtering logic, update go-structr, general improvements

* more code comments

* add important note

* fix timeline tests now that timelines are returned in page order

* remove unused field

* add StatusTimeline{} tests

* add more status timeline tests

* start adding preloading support

* ensure repeat boosts are marked in preloaded entries

* share a bunch of the database load code in timeline cache, don't clear timelines on relationship change

* add logic to allow dynamic clear / preloading of timelines

* comment-out unused functions, but leave in place as we might end-up using them

* fix timeline preload state check

* much improved status timeline code comments

* more code comments, don't bother inserting statuses if timeline not preloaded

* shift around some logic to make sure things aren't accidentally left set

* finish writing code comments

* remove trim-after-insert behaviour

* fix-up some comments referring to old logic

* remove unsetting of lo, hi

* fix preload repeatBoost checking logic

* don't return on status filter errors, these are usually transient

* better concurrency safety in Clear() and Done()

* fix test broken due to addition of preloader

* fix repeatBoost logic that doesn't account for already-hidden repeatBoosts

* ensure edit submodels are dropped on cache insertion

* update code-comment to expand CAS accronym

* use a plus1hULID() instead of 24h

* remove unused functions

* add note that public / local timeline requester can be nil

* fix incorrect visibility filtering of tag timeline statuses

* ensure we filter home timeline statuses on local only

* some small re-orderings to confirm query params in correct places

* fix the local only home timeline filter func

internal/federation/federatingdb/federatingdb_test.go

@@ -25,7 +25,6 @@ import (
 	"github.com/superseriousbusiness/gotosocial/internal/admin"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/federation/federatingdb"
-	"github.com/superseriousbusiness/gotosocial/internal/filter/visibility"
 	"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 	"github.com/superseriousbusiness/gotosocial/internal/messages"
@@ -80,12 +79,6 @@ func (suite *FederatingDBTestSuite) SetupTest() {
 	suite.testActivities = testrig.NewTestActivities(suite.testAccounts)
 	suite.tc = typeutils.NewConverter(&suite.state)
 
-	testrig.StartTimelines(
-		&suite.state,
-		visibility.NewFilter(&suite.state),
-		suite.tc,
-	)
-
 	suite.federatingDB = testrig.NewTestFederatingDB(&suite.state)
 	testrig.StandardDBSetup(suite.db, suite.testAccounts)
 

internal/federation/federatingdb/undo.go

@@ -136,10 +136,7 @@ func (f *federatingDB) undoFollow(
 
 	// Convert AS Follow to barebones *gtsmodel.Follow,
 	// retrieving origin + target accts from the db.
-	follow, err := f.converter.ASFollowToFollow(
-		gtscontext.SetBarebones(ctx),
-		asFollow,
-	)
+	follow, err := f.converter.ASFollowToFollow(ctx, asFollow)
 	if err != nil && !errors.Is(err, db.ErrNoEntries) {
 		err := gtserror.Newf("error converting AS Follow to follow: %w", err)
 		return err
@@ -152,6 +149,11 @@ func (f *federatingDB) undoFollow(
 		return nil
 	}
 
+	// Lock on the Follow URI
+	// as we may be updating it.
+	unlock := f.state.FedLocks.Lock(follow.URI)
+	defer unlock()
+
 	// Ensure addressee is follow target.
 	if follow.TargetAccountID != receivingAcct.ID {
 		const text = "receivingAcct was not Follow target"
@@ -178,7 +180,16 @@ func (f *federatingDB) undoFollow(
 		return err
 	}
 
-	log.Debug(ctx, "Follow undone")
+	// Send the deleted follow through to
+	// the fedi worker to process side effects.
+	f.state.Workers.Federator.Queue.Push(&messages.FromFediAPI{
+		APObjectType:   ap.ActivityFollow,
+		APActivityType: ap.ActivityUndo,
+		GTSModel:       follow,
+		Receiving:      receivingAcct,
+		Requesting:     requestingAcct,
+	})
+
 	return nil
 }
 
@@ -269,7 +280,16 @@ func (f *federatingDB) undoLike(
 		return err
 	}
 
-	log.Debug(ctx, "Like undone")
+	// Send the deleted block through to
+	// the fedi worker to process side effects.
+	f.state.Workers.Federator.Queue.Push(&messages.FromFediAPI{
+		APObjectType:   ap.ActivityLike,
+		APActivityType: ap.ActivityUndo,
+		GTSModel:       fave,
+		Receiving:      receivingAcct,
+		Requesting:     requestingAcct,
+	})
+
 	return nil
 }
 
@@ -298,10 +318,7 @@ func (f *federatingDB) undoBlock(
 
 	// Convert AS Block to barebones *gtsmodel.Block,
 	// retrieving origin + target accts from the DB.
-	block, err := f.converter.ASBlockToBlock(
-		gtscontext.SetBarebones(ctx),
-		asBlock,
-	)
+	block, err := f.converter.ASBlockToBlock(ctx, asBlock)
 	if err != nil && !errors.Is(err, db.ErrNoEntries) {
 		err := gtserror.Newf("error converting AS Block to block: %w", err)
 		return err
@@ -333,7 +350,16 @@ func (f *federatingDB) undoBlock(
 		return err
 	}
 
-	log.Debug(ctx, "Block undone")
+	// Send the deleted block through to
+	// the fedi worker to process side effects.
+	f.state.Workers.Federator.Queue.Push(&messages.FromFediAPI{
+		APObjectType:   ap.ActivityBlock,
+		APActivityType: ap.ActivityUndo,
+		GTSModel:       block,
+		Receiving:      receivingAcct,
+		Requesting:     requestingAcct,
+	})
+
 	return nil
 }