[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, 145 deletions

diff --git a/internal/api/client/auth/signin.go b/internal/api/client/auth/signin.go
deleted file mode 100644
index 73a5de398..000000000
--- a/internal/api/client/auth/signin.go
+++ /dev/null
@@ -1,145 +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 auth
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"net/http"
-
-	"github.com/gin-contrib/sessions"
-	"github.com/gin-gonic/gin"
-	"github.com/superseriousbusiness/gotosocial/internal/api"
-	"github.com/superseriousbusiness/gotosocial/internal/config"
-	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
-	"github.com/superseriousbusiness/gotosocial/internal/oauth"
-	"golang.org/x/crypto/bcrypt"
-)
-
-// login just wraps a form-submitted username (we want an email) and password
-type login struct {
-	Email    string `form:"username"`
-	Password string `form:"password"`
-}
-
-// SignInGETHandler should be served at https://example.org/auth/sign_in.
-// The idea is to present a sign in page to the user, where they can enter their username and password.
-// The form will then POST to the sign in page, which will be handled by SignInPOSTHandler.
-// If an idp provider is set, then the user will be redirected to that to do their sign in.
-func (m *Module) SignInGETHandler(c *gin.Context) {
-	if _, err := api.NegotiateAccept(c, api.HTMLAcceptHeaders...); err != nil {
-		api.ErrorHandler(c, gtserror.NewErrorNotAcceptable(err, err.Error()), m.processor.InstanceGet)
-		return
-	}
-
-	if m.idp == nil {
-		instance, errWithCode := m.processor.InstanceGet(c.Request.Context(), config.GetHost())
-		if errWithCode != nil {
-			api.ErrorHandler(c, errWithCode, m.processor.InstanceGet)
-			return
-		}
-
-		// no idp provider, use our own funky little sign in page
-		c.HTML(http.StatusOK, "sign-in.tmpl", gin.H{
-			"instance": instance,
-		})
-		return
-	}
-
-	// idp provider is in use, so redirect to it
-	s := sessions.Default(c)
-
-	internalStateI := s.Get(sessionInternalState)
-	internalState, ok := internalStateI.(string)
-	if !ok {
-		m.clearSession(s)
-		err := fmt.Errorf("key %s was not found in session", sessionInternalState)
-		api.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
-		return
-	}
-
-	c.Redirect(http.StatusSeeOther, m.idp.AuthCodeURL(internalState))
-}
-
-// SignInPOSTHandler should be served at https://example.org/auth/sign_in.
-// The idea is to present a sign in page to the user, where they can enter their username and password.
-// The handler will then redirect to the auth handler served at /auth
-func (m *Module) SignInPOSTHandler(c *gin.Context) {
-	s := sessions.Default(c)
-
-	form := &login{}
-	if err := c.ShouldBind(form); err != nil {
-		m.clearSession(s)
-		api.ErrorHandler(c, gtserror.NewErrorBadRequest(err, oauth.HelpfulAdvice), m.processor.InstanceGet)
-		return
-	}
-
-	userid, errWithCode := m.ValidatePassword(c.Request.Context(), form.Email, form.Password)
-	if errWithCode != nil {
-		// don't clear session here, so the user can just press back and try again
-		// if they accidentally gave the wrong password or something
-		api.ErrorHandler(c, errWithCode, m.processor.InstanceGet)
-		return
-	}
-
-	s.Set(sessionUserID, userid)
-	if err := s.Save(); err != nil {
-		err := fmt.Errorf("error saving user id onto session: %s", err)
-		api.ErrorHandler(c, gtserror.NewErrorInternalError(err, oauth.HelpfulAdvice), m.processor.InstanceGet)
-	}
-
-	c.Redirect(http.StatusFound, OauthAuthorizePath)
-}
-
-// ValidatePassword takes an email address and a password.
-// The goal is to authenticate the password against the one for that email
-// address stored in the database. If OK, we return the userid (a ulid) for that user,
-// so that it can be used in further Oauth flows to generate a token/retreieve an oauth client from the db.
-func (m *Module) ValidatePassword(ctx context.Context, email string, password string) (string, gtserror.WithCode) {
-	if email == "" || password == "" {
-		err := errors.New("email or password was not provided")
-		return incorrectPassword(err)
-	}
-
-	user, err := m.db.GetUserByEmailAddress(ctx, email)
-	if err != nil {
-		err := fmt.Errorf("user %s was not retrievable from db during oauth authorization attempt: %s", email, err)
-		return incorrectPassword(err)
-	}
-
-	if user.EncryptedPassword == "" {
-		err := fmt.Errorf("encrypted password for user %s was empty for some reason", user.Email)
-		return incorrectPassword(err)
-	}
-
-	if err := bcrypt.CompareHashAndPassword([]byte(user.EncryptedPassword), []byte(password)); err != nil {
-		err := fmt.Errorf("password hash didn't match for user %s during login attempt: %s", user.Email, err)
-		return incorrectPassword(err)
-	}
-
-	return user.ID, nil
-}
-
-// incorrectPassword wraps the given error in a gtserror.WithCode, and returns
-// only a generic 'safe' error message to the user, to not give any info away.
-func incorrectPassword(err error) (string, gtserror.WithCode) {
-	safeErr := fmt.Errorf("password/email combination was incorrect")
-	return "", gtserror.NewErrorUnauthorized(err, safeErr.Error(), oauth.HelpfulAdvice)
-}