[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

testrig/util.go

@@ -20,7 +20,6 @@ package testrig
 import (
 	"bytes"
 	"context"
-	"fmt"
 	"io"
 	"mime/multipart"
 	"net/url"
@@ -30,14 +29,10 @@ import (
 
 	"codeberg.org/gruf/go-byteutil"
 	"codeberg.org/gruf/go-kv/format"
-	"github.com/superseriousbusiness/gotosocial/internal/filter/visibility"
 	"github.com/superseriousbusiness/gotosocial/internal/log"
 	"github.com/superseriousbusiness/gotosocial/internal/messages"
-	tlprocessor "github.com/superseriousbusiness/gotosocial/internal/processing/timeline"
 	"github.com/superseriousbusiness/gotosocial/internal/processing/workers"
 	"github.com/superseriousbusiness/gotosocial/internal/state"
-	"github.com/superseriousbusiness/gotosocial/internal/timeline"
-	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
 )
 
 // Starts workers on the provided state using noop processing functions.
@@ -96,28 +91,6 @@ func StopWorkers(state *state.State) {
 	state.Workers.WebPush.Stop()
 }
 
-func StartTimelines(state *state.State, visFilter *visibility.Filter, converter *typeutils.Converter) {
-	state.Timelines.Home = timeline.NewManager(
-		tlprocessor.HomeTimelineGrab(state),
-		tlprocessor.HomeTimelineFilter(state, visFilter),
-		tlprocessor.HomeTimelineStatusPrepare(state, converter),
-		tlprocessor.SkipInsert(),
-	)
-	if err := state.Timelines.Home.Start(); err != nil {
-		panic(fmt.Sprintf("error starting home timeline: %s", err))
-	}
-
-	state.Timelines.List = timeline.NewManager(
-		tlprocessor.ListTimelineGrab(state),
-		tlprocessor.ListTimelineFilter(state, visFilter),
-		tlprocessor.ListTimelineStatusPrepare(state, converter),
-		tlprocessor.SkipInsert(),
-	)
-	if err := state.Timelines.List.Start(); err != nil {
-		panic(fmt.Sprintf("error starting list timeline: %s", err))
-	}
-}
-
 // EqualRequestURIs checks whether inputs have equal request URIs,
 // handling cases of url.URL{}, *url.URL{}, string, *string.
 func EqualRequestURIs(u1, u2 any) bool {