[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, 7 insertions, 36 deletions

diff --git a/internal/processing/status/get.go b/internal/processing/status/get.go
index 393c6001e..251a095de 100644
--- a/internal/processing/status/get.go
+++ b/internal/processing/status/get.go
@@ -19,8 +19,6 @@ package status
 
 import (
 	"context"
-	"errors"
-	"fmt"
 	"sort"
 
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
@@ -30,46 +28,19 @@ import (
 
 // Get gets the given status, taking account of privacy settings and blocks etc.
 func (p *Processor) Get(ctx context.Context, requestingAccount *gtsmodel.Account, targetStatusID string) (*apimodel.Status, gtserror.WithCode) {
-	targetStatus, err := p.state.DB.GetStatusByID(ctx, targetStatusID)
-	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))
-	}
-
-	visible, err := p.filter.StatusVisible(ctx, targetStatus, requestingAccount)
-	if err != nil {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error seeing if status %s is visible: %s", targetStatus.ID, err))
-	}
-	if !visible {
-		return nil, gtserror.NewErrorNotFound(errors.New("status is not visible"))
+	targetStatus, errWithCode := p.getVisibleStatus(ctx, requestingAccount, targetStatusID)
+	if errWithCode != nil {
+		return nil, errWithCode
 	}
 
-	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))
-	}
-
-	return apiStatus, nil
+	return p.apiStatus(ctx, targetStatus, requestingAccount)
 }
 
 // ContextGet returns the context (previous and following posts) from the given status ID.
 func (p *Processor) ContextGet(ctx context.Context, requestingAccount *gtsmodel.Account, targetStatusID string) (*apimodel.Context, gtserror.WithCode) {
-	targetStatus, err := p.state.DB.GetStatusByID(ctx, targetStatusID)
-	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))
-	}
-
-	visible, err := p.filter.StatusVisible(ctx, targetStatus, requestingAccount)
-	if err != nil {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error seeing if status %s is visible: %s", targetStatus.ID, err))
-	}
-	if !visible {
-		return nil, gtserror.NewErrorNotFound(errors.New("status is not visible"))
+	targetStatus, errWithCode := p.getVisibleStatus(ctx, requestingAccount, targetStatusID)
+	if errWithCode != nil {
+		return nil, errWithCode
 	}
 
 	context := &apimodel.Context{