[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

internal/api/activitypub/users/outboxget.go

@@ -0,0 +1,145 @@
+/*
+   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 (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+)
+
+// OutboxGETHandler swagger:operation GET /users/{username}/outbox s2sOutboxGet
+//
+// Get the public outbox collection for an actor.
+//
+// Note that the response will be a Collection with a page as `first`, as shown below, if `page` is `false`.
+//
+// If `page` is `true`, then the response will be a single `CollectionPage` without the wrapping `Collection`.
+//
+// HTTP signature is required on the request.
+//
+//	---
+//	tags:
+//	- s2s/federation
+//
+//	produces:
+//	- application/activity+json
+//
+//	parameters:
+//	-
+//		name: username
+//		type: string
+//		description: Username of the account.
+//		in: path
+//		required: true
+//	-
+//		name: page
+//		type: boolean
+//		description: Return response as a CollectionPage.
+//		in: query
+//		default: false
+//	-
+//		name: min_id
+//		type: string
+//		description: Minimum ID of the next status, used for paging.
+//		in: query
+//	-
+//		name: max_id
+//		type: string
+//		description: Maximum ID of the next status, used for paging.
+//		in: query
+//
+//	responses:
+//		'200':
+//			in: body
+//			schema:
+//				"$ref": "#/definitions/swaggerCollection"
+//		'400':
+//			description: bad request
+//		'401':
+//			description: unauthorized
+//		'403':
+//			description: forbidden
+//		'404':
+//			description: not found
+func (m *Module) OutboxGETHandler(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
+	}
+
+	format, err := apiutil.NegotiateAccept(c, apiutil.HTMLOrActivityPubHeaders...)
+	if err != nil {
+		apiutil.ErrorHandler(c, gtserror.NewErrorNotAcceptable(err, err.Error()), m.processor.InstanceGet)
+		return
+	}
+
+	if format == string(apiutil.TextHTML) {
+		// redirect to the user's profile
+		c.Redirect(http.StatusSeeOther, "/@"+requestedUsername)
+		return
+	}
+
+	var page bool
+	if pageString := c.Query(PageKey); pageString != "" {
+		i, err := strconv.ParseBool(pageString)
+		if err != nil {
+			err := fmt.Errorf("error parsing %s: %s", PageKey, err)
+			apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
+			return
+		}
+		page = i
+	}
+
+	minID := ""
+	minIDString := c.Query(MinIDKey)
+	if minIDString != "" {
+		minID = minIDString
+	}
+
+	maxID := ""
+	maxIDString := c.Query(MaxIDKey)
+	if maxIDString != "" {
+		maxID = maxIDString
+	}
+
+	resp, errWithCode := m.processor.GetFediOutbox(apiutil.TransferSignatureContext(c), requestedUsername, page, maxID, minID, c.Request.URL)
+	if errWithCode != nil {
+		apiutil.ErrorHandler(c, errWithCode, m.processor.InstanceGet)
+		return
+	}
+
+	b, err := json.Marshal(resp)
+	if err != nil {
+		apiutil.ErrorHandler(c, gtserror.NewErrorInternalError(err), m.processor.InstanceGet)
+		return
+	}
+
+	c.Data(http.StatusOK, format, b)
+}