Move more model into models/user (#17826)

* Move more model into models/user

* Remove unnecessary comment

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

models/user/list.go

@@ -0,0 +1,69 @@
+// Copyright 2019 The Gitea 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 user
+
+import (
+	"fmt"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/models/login"
+)
+
+// UserList is a list of user.
+// This type provide valuable methods to retrieve information for a group of users efficiently.
+type UserList []*User //revive:disable-line:exported
+
+// GetUserIDs returns a slice of user's id
+func (users UserList) GetUserIDs() []int64 {
+	userIDs := make([]int64, len(users))
+	for _, user := range users {
+		userIDs = append(userIDs, user.ID) // Considering that user id are unique in the list
+	}
+	return userIDs
+}
+
+// GetTwoFaStatus return state of 2FA enrollement
+func (users UserList) GetTwoFaStatus() map[int64]bool {
+	results := make(map[int64]bool, len(users))
+	for _, user := range users {
+		results[user.ID] = false // Set default to false
+	}
+	tokenMaps, err := users.loadTwoFactorStatus(db.GetEngine(db.DefaultContext))
+	if err == nil {
+		for _, token := range tokenMaps {
+			results[token.UID] = true
+		}
+	}
+
+	return results
+}
+
+func (users UserList) loadTwoFactorStatus(e db.Engine) (map[int64]*login.TwoFactor, error) {
+	if len(users) == 0 {
+		return nil, nil
+	}
+
+	userIDs := users.GetUserIDs()
+	tokenMaps := make(map[int64]*login.TwoFactor, len(userIDs))
+	err := e.
+		In("uid", userIDs).
+		Find(&tokenMaps)
+	if err != nil {
+		return nil, fmt.Errorf("find two factor: %v", err)
+	}
+	return tokenMaps, nil
+}
+
+// GetUsersByIDs returns all resolved users from a list of Ids.
+func GetUsersByIDs(ids []int64) (UserList, error) {
+	ous := make([]*User, 0, len(ids))
+	if len(ids) == 0 {
+		return ous, nil
+	}
+	err := db.GetEngine(db.DefaultContext).In("id", ids).
+		Asc("name").
+		Find(&ous)
+	return ous, err
+}