Move modules/forms to services/forms (#15305)

Forms are dependent on models and therefore should be in services.

This PR also removes the old auth. aliasing

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

services/forms/auth_form.go

@@ -0,0 +1,75 @@
+// Copyright 2014 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package forms
+
+import (
+	"net/http"
+
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/web/middleware"
+
+	"gitea.com/go-chi/binding"
+)
+
+// AuthenticationForm form for authentication
+type AuthenticationForm struct {
+	ID                            int64
+	Type                          int    `binding:"Range(2,7)"`
+	Name                          string `binding:"Required;MaxSize(30)"`
+	Host                          string
+	Port                          int
+	BindDN                        string
+	BindPassword                  string
+	UserBase                      string
+	UserDN                        string
+	AttributeUsername             string
+	AttributeName                 string
+	AttributeSurname              string
+	AttributeMail                 string
+	AttributeSSHPublicKey         string
+	AttributesInBind              bool
+	UsePagedSearch                bool
+	SearchPageSize                int
+	Filter                        string
+	AdminFilter                   string
+	GroupsEnabled                 bool
+	GroupDN                       string
+	GroupFilter                   string
+	GroupMemberUID                string
+	UserUID                       string
+	RestrictedFilter              string
+	AllowDeactivateAll            bool
+	IsActive                      bool
+	IsSyncEnabled                 bool
+	SMTPAuth                      string
+	SMTPHost                      string
+	SMTPPort                      int
+	AllowedDomains                string
+	SecurityProtocol              int `binding:"Range(0,2)"`
+	TLS                           bool
+	SkipVerify                    bool
+	PAMServiceName                string
+	Oauth2Provider                string
+	Oauth2Key                     string
+	Oauth2Secret                  string
+	OpenIDConnectAutoDiscoveryURL string
+	Oauth2UseCustomURL            bool
+	Oauth2TokenURL                string
+	Oauth2AuthURL                 string
+	Oauth2ProfileURL              string
+	Oauth2EmailURL                string
+	Oauth2IconURL                 string
+	SSPIAutoCreateUsers           bool
+	SSPIAutoActivateUsers         bool
+	SSPIStripDomainNames          bool
+	SSPISeparatorReplacement      string `binding:"AlphaDashDot;MaxSize(5)"`
+	SSPIDefaultLanguage           string
+}
+
+// Validate validates fields
+func (f *AuthenticationForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
+	ctx := context.GetContext(req)
+	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
+}