[chore] The Big Middleware and API Refactor (tm) (#1250)

* interim commit: start refactoring middlewares into package under router

* another interim commit, this is becoming a big job

* another fucking massive interim commit

* refactor bookmarks to new style

* ambassador, wiz zeze commits you are spoiling uz

* she compiles, we're getting there

* we're just normal men; we're just innocent men

* apiutil

* whoopsie

* i'm glad noone reads commit msgs haha :blob_sweat:

* use that weirdo go-bytesize library for maxMultipartMemory

* fix media module paths

1 files changed, 51 insertions, 0 deletions

diff --git a/internal/api/activitypub/users/inboxpost.go b/internal/api/activitypub/users/inboxpost.go
new file mode 100644
index 000000000..1d8f9f923
--- /dev/null
+++ b/internal/api/activitypub/users/inboxpost.go
@@ -0,0 +1,51 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package users
+
+import (
+	"errors"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror" //nolint:typecheck
+)
+
+// InboxPOSTHandler deals with incoming POST requests to an actor's inbox.
+// Eg., POST to https://example.org/users/whatever/inbox.
+func (m *Module) InboxPOSTHandler(c *gin.Context) {
+	// usernames on our instance are always lowercase
+	requestedUsername := strings.ToLower(c.Param(UsernameKey))
+	if requestedUsername == "" {
+		err := errors.New("no username specified in request")
+		apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
+		return
+	}
+
+	if posted, err := m.processor.InboxPost(apiutil.TransferSignatureContext(c), c.Writer, c.Request); err != nil {
+		if withCode, ok := err.(gtserror.WithCode); ok {
+			apiutil.ErrorHandler(c, withCode, m.processor.InstanceGet)
+		} else {
+			apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
+		}
+	} else if !posted {
+		err := errors.New("unable to process request")
+		apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
+	}
+}