[chore] Deinterface processor and subprocessors (#1501)

* [chore] Deinterface processor and subprocessors

* expose subprocessors via function calls

* missing license header

internal/processing/user/user.go

@@ -19,33 +19,18 @@
 package user
 
 import (
-	"context"
-
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/email"
-	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
-	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 )
 
-// Processor wraps a bunch of functions for processing user-level actions.
-type Processor interface {
-	// ChangePassword changes the specified user's password from old => new,
-	// or returns an error if the new password is too weak, or the old password is incorrect.
-	ChangePassword(ctx context.Context, user *gtsmodel.User, oldPassword string, newPassword string) gtserror.WithCode
-	// SendConfirmEmail sends a 'confirm-your-email-address' type email to a user.
-	SendConfirmEmail(ctx context.Context, user *gtsmodel.User, username string) error
-	// ConfirmEmail confirms an email address using the given token.
-	ConfirmEmail(ctx context.Context, token string) (*gtsmodel.User, gtserror.WithCode)
-}
-
-type processor struct {
+type Processor struct {
 	emailSender email.Sender
 	db          db.DB
 }
 
 // New returns a new user processor
 func New(db db.DB, emailSender email.Sender) Processor {
-	return &processor{
+	return Processor{
 		emailSender: emailSender,
 		db:          db,
 	}