[performance] refactoring + add fave / follow / request / visibility caching (#1607)

* refactor visibility checking, add caching for visibility

* invalidate visibility cache items on account / status deletes

* fix requester ID passed to visibility cache nil ptr

* de-interface caches, fix home / public timeline caching + visibility

* finish adding code comments for visibility filter

* fix angry goconst linter warnings

* actually finish adding filter visibility code comments for timeline functions

* move home timeline status author check to after visibility

* remove now-unused code

* add more code comments

* add TODO code comment, update printed cache start names

* update printed cache names on stop

* start adding separate follow(request) delete db functions, add specific visibility cache tests

* add relationship type caching

* fix getting local account follows / followed-bys, other small codebase improvements

* simplify invalidation using cache hooks, add more GetAccountBy___() functions

* fix boosting to return 404 if not boostable but no error (to not leak status ID)

* remove dead code

* improved placement of cache invalidation

* update license headers

* add example follow, follow-request config entries

* add example visibility cache configuration to config file

* use specific PutFollowRequest() instead of just Put()

* add tests for all GetAccountBy()

* add GetBlockBy() tests

* update block to check primitive fields

* update and finish adding Get{Account,Block,Follow,FollowRequest}By() tests

* fix copy-pasted code

* update envparsing test

* whitespace

* fix bun struct tag

* add license header to gtscontext

* fix old license header

* improved error creation to not use fmt.Errorf() when not needed

* fix various rebase conflicts, fix account test

* remove commented-out code, fix-up mention caching

* fix mention select bun statement

* ensure mention target account populated, pass in context to customrenderer logging

* remove more uncommented code, fix typeutil test

* add statusfave database model caching

* add status fave cache configuration

* add status fave cache example config

* woops, catch missed error. nice catch linter!

* add back testrig panic on nil db

* update example configuration to match defaults, slight tweak to cache configuration defaults

* update envparsing test with new defaults

* fetch followingget to use the follow target account

* use accounnt.IsLocal() instead of empty domain check

* use constants for the cache visibility type check

* use bun.In() for notification type restriction in db query

* include replies when fetching PublicTimeline() (to account for single-author threads in Visibility{}.StatusPublicTimelineable())

* use bun query building for nested select statements to ensure working with postgres

* update public timeline future status checks to match visibility filter

* same as previous, for home timeline

* update public timeline tests to dynamically check for appropriate statuses

* migrate accounts to allow unique constraint on public_key

* provide minimal account with publicKey

---------

Signed-off-by: kim <grufwub@gmail.com>
Co-authored-by: tsmethurst <tobi.smethurst@protonmail.com>

internal/db/bundb/basic_test.go

@@ -19,6 +19,8 @@ package bundb_test
 
 import (
 	"context"
+	"crypto/rand"
+	"crypto/rsa"
 	"testing"
 	"time"
 
@@ -40,6 +42,12 @@ func (suite *BasicTestSuite) TestGetAccountByID() {
 }
 
 func (suite *BasicTestSuite) TestPutAccountWithBunDefaultFields() {
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	// Create an account that only just matches constraints.
 	testAccount := &gtsmodel.Account{
 		ID:           "01GADR1AH9VCKH8YYCM86XSZ00",
 		Username:     "test",
@@ -49,6 +57,7 @@ func (suite *BasicTestSuite) TestPutAccountWithBunDefaultFields() {
 		OutboxURI:    "https://example.org/users/test/outbox",
 		ActorType:    "Person",
 		PublicKeyURI: "https://example.org/test#main-key",
+		PublicKey:    &key.PublicKey,
 	}
 
 	if err := suite.db.Put(context.Background(), testAccount); err != nil {
@@ -99,7 +108,7 @@ func (suite *BasicTestSuite) TestPutAccountWithBunDefaultFields() {
 	suite.Empty(a.FeaturedCollectionURI)
 	suite.Equal(testAccount.ActorType, a.ActorType)
 	suite.Nil(a.PrivateKey)
-	suite.Nil(a.PublicKey)
+	suite.EqualValues(key.PublicKey, *a.PublicKey)
 	suite.Equal(testAccount.PublicKeyURI, a.PublicKeyURI)
 	suite.Zero(a.SensitizedAt)
 	suite.Zero(a.SilencedAt)