[chore] Refactor account deleting/block logic, tidy up some other processing things (#1599)

* start refactoring account deletion

* update to use state.DB

* further messing about

* some more tidying up

* more tidying, cleaning, nice-making

* further adventures in refactoring and the woes of technical debt

* update fr accept/reject

* poking + prodding

* fix up deleting

* create fave uri

* don't log using requestingAccount.ID because it might be nil

* move getBookmarks function

* use exists query to check for status bookmark

* use deletenotifications func

* fiddle

* delete follow request notif

* split up some db functions

* Fix possible nil pointer panic

* fix more possible nil pointers

* fix license headers

* warn when follow missing (target) account

* return wrapped err when bookmark/fave models can't be retrieved

* simplify self account delete

* warn log likely race condition

* de-sillify status delete loop

* move error check due north

* warn when unfollowSideEffects has no target account

* warn when no boost account is found

* warn + dump follow when no account

* more warnings

* warn on fave account not set

* move for loop inside anonymous function

* fix funky logic

* don't remove mutual account items on block;
do make sure unfollow occurs in both directions!

1 files changed, 6 insertions, 4 deletions

diff --git a/internal/processing/status/delete.go b/internal/processing/status/delete.go
index fc6743ed2..5549e0329 100644
--- a/internal/processing/status/delete.go
+++ b/internal/processing/status/delete.go
@@ -35,6 +35,7 @@ func (p *Processor) Delete(ctx context.Context, requestingAccount *gtsmodel.Acco
 	if err != nil {
 		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error fetching status %s: %s", targetStatusID, err))
 	}
+
 	if targetStatus.Account == nil {
 		return nil, gtserror.NewErrorNotFound(fmt.Errorf("no status owner for status %s", targetStatusID))
 	}
@@ -43,12 +44,13 @@ func (p *Processor) Delete(ctx context.Context, requestingAccount *gtsmodel.Acco
 		return nil, gtserror.NewErrorForbidden(errors.New("status doesn't belong to requesting account"))
 	}
 
-	apiStatus, err := p.tc.StatusToAPIStatus(ctx, targetStatus, requestingAccount)
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting status %s to frontend representation: %s", targetStatus.ID, err))
+	// Parse the status to API model BEFORE deleting it.
+	apiStatus, errWithCode := p.apiStatus(ctx, targetStatus, requestingAccount)
+	if errWithCode != nil {
+		return nil, errWithCode
 	}
 
-	// send the status back to the processor for async processing
+	// Process delete side effects.
 	p.state.Workers.EnqueueClientAPI(ctx, messages.FromClientAPI{
 		APObjectType:   ap.ObjectNote,
 		APActivityType: ap.ActivityDelete,