[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, 0 insertions, 104 deletions

diff --git a/internal/api/negotiate.go b/internal/api/negotiate.go
deleted file mode 100644
index cf44f4328..000000000
--- a/internal/api/negotiate.go
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
-   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 api
-
-import (
-	"errors"
-	"fmt"
-
-	"github.com/gin-gonic/gin"
-)
-
-// ActivityPubAcceptHeaders represents the Accept headers mentioned here:
-var ActivityPubAcceptHeaders = []MIME{
-	AppActivityJSON,
-	AppActivityLDJSON,
-}
-
-// JSONAcceptHeaders is a slice of offers that just contains application/json types.
-var JSONAcceptHeaders = []MIME{
-	AppJSON,
-}
-
-// HTMLOrJSONAcceptHeaders is a slice of offers that prefers TextHTML and will
-// fall back to JSON if necessary. This is useful for error handling, since it can
-// be used to serve a nice HTML page if the caller accepts that, or just JSON if not.
-var HTMLOrJSONAcceptHeaders = []MIME{
-	TextHTML,
-	AppJSON,
-}
-
-// HTMLAcceptHeaders is a slice of offers that just contains text/html types.
-var HTMLAcceptHeaders = []MIME{
-	TextHTML,
-}
-
-// HTMLOrActivityPubHeaders matches text/html first, then activitypub types.
-// This is useful for user URLs that a user might go to in their browser.
-// https://www.w3.org/TR/activitypub/#retrieving-objects
-var HTMLOrActivityPubHeaders = []MIME{
-	TextHTML,
-	AppActivityJSON,
-	AppActivityLDJSON,
-}
-
-// NegotiateAccept takes the *gin.Context from an incoming request, and a
-// slice of Offers, and performs content negotiation for the given request
-// with the given content-type offers. It will return a string representation
-// of the first suitable content-type, or an error if something goes wrong or
-// a suitable content-type cannot be matched.
-//
-// For example, if the request in the *gin.Context has Accept headers of value
-// [application/json, text/html], and the provided offers are of value
-// [application/json, application/xml], then the returned string will be
-// 'application/json', which indicates the content-type that should be returned.
-//
-// If the length of offers is 0, then an error will be returned, so this function
-// should only be called in places where format negotiation is actually needed.
-//
-// If there are no Accept headers in the request, then the first offer will be returned,
-// under the assumption that it's better to serve *something* than error out completely.
-//
-// Callers can use the offer slices exported in this package as shortcuts for
-// often-used Accept types.
-//
-// See https://developer.mozilla.org/en-US/docs/Web/HTTP/Content_negotiation#server-driven_content_negotiation
-func NegotiateAccept(c *gin.Context, offers ...MIME) (string, error) {
-	if len(offers) == 0 {
-		return "", errors.New("no format offered")
-	}
-
-	strings := []string{}
-	for _, o := range offers {
-		strings = append(strings, string(o))
-	}
-
-	accepts := c.Request.Header.Values("Accept")
-	if len(accepts) == 0 {
-		// there's no accept header set, just return the first offer
-		return strings[0], nil
-	}
-
-	format := c.NegotiateFormat(strings...)
-	if format == "" {
-		return "", fmt.Errorf("no format can be offered for requested Accept header(s) %s; this endpoint offers %s", accepts, offers)
-	}
-
-	return format, nil
-}