TEAMModelOS/TEAMModelOS.SDK/Models/Service/Common/TeacherService.cs

using Microsoft.Azure.Cosmos;
using Azure.Storage.Blobs.Models;
using Azure.Storage.Sas;
using System;
using System.Collections.Generic;
using System.Dynamic;
using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;
using TEAMModelOS.Models;
using TEAMModelOS.SDK.Models;
using TEAMModelOS.SDK.DI;
using TEAMModelOS.SDK.Extension;
using TEAMModelOS.SDK;
using static TEAMModelOS.SDK.Models.Teacher;
using static TEAMModelOS.SDK.DI.AzureCosmosExtensions;

namespace TEAMModelOS.Services
{
    public static class TeacherService
    {
        public static async Task<TeacherInfo> TeacherInfoLite(AzureCosmosFactory _azureCosmos,  string name, string picture, string id,
           AzureStorageFactory _azureStorage, Option _option, AzureRedisFactory _azureRedis, string ip, HttpTrigger _httpTrigger, string lang,int timezone)
        {
            Teacher teacher = null;
            string defaultschool = null;
            //TODO 取得Teacher 個人相關數據(課程清單、虛擬教室清單、歷史紀錄清單等)，學校數據另外API處理，多校切換時不同
            var client = _azureCosmos.GetCosmosClient();
            try
            {
                if (teacher == null)
                {
                    teacher = await client.GetContainer(Constant.TEAMModelOS, "Teacher").ReadItemAsync<Teacher>(id, new PartitionKey("Base"));
                    if (!string.IsNullOrWhiteSpace(lang) && string.IsNullOrWhiteSpace(teacher.lang))
                    {
                        teacher.lang = lang;
                    }
                    teacher.name = $"{name}";
                    teacher.picture = $"{picture}";
                }
                else
                {
                    name = teacher.name;
                    picture = teacher.picture;
                    id = teacher.id;
                }
                //处理导入时，在学校名单有该教师加入的，但是基本信息没有的 
                string schoolJoinTeacher = $"SELECT value  c.id FROM c join b in c.teachers where c.code='TeacherImport' and b.tmdid='{teacher.id}' and b.status='join'";
                var schoolJoins = await client.GetContainer(Constant.TEAMModelOS, Constant.School).GetList<string>(schoolJoinTeacher, "TeacherImport");
                if (schoolJoins.list.IsNotEmpty())
                {
                    var notInBase = schoolJoins.list.Except(teacher.schools.Select(z => z.schoolId));
                    if (notInBase.Any())
                    {
                        string sqlSchoolBase = $"SELECT value  c  FROM c  where c.id in ({string.Join(",", notInBase.Select(z => $"'{z}'"))})";
                        var schoolBase = await client.GetContainer(Constant.TEAMModelOS, Constant.School).GetList<School>(sqlSchoolBase, "Base");
                        if (schoolBase.list.IsNotEmpty())
                        {
                            var nowtime = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
                            foreach (var school in schoolBase.list)
                            {
                                if (!teacher.schools.Exists(z => z.schoolId.Equals(school.id)))
                                {
                                    teacher.schools.Add(new TeacherSchool { schoolId = school.id, areaId = school.areaId, name = school.name, picture = school.picture, status = "join", time = nowtime });
                                }
                            }
                        }
                    }
                }

                //检查是否有加入学校，如果加入学校，则当个人空间size是0G的时候，则免费获得一个G空间，但无论加入多少个学校，只能获取一次 1G的免费空间。没有加入学校则默认0G空间,除非自己购买空间
                if (teacher.schools.IsNotEmpty())
                {
                    foreach (var sc in teacher.schools)
                    {
                        string statusNow = sc.status != null ? sc.status : "";
                        if (statusNow.Equals("join"))
                        {
                            var sctch = await client.GetContainer(Constant.TEAMModelOS, "School").ReadItemStreamAsync(id, new PartitionKey($"Teacher-{sc.schoolId}"));
                            if (sctch.Status == 200 && sctch != null && sctch.Content != null)
                            {
                                var jsonDoc = await JsonDocument.ParseAsync(sctch.Content);
                                SchoolTeacher schoolTeacher = jsonDoc.RootElement.ToObject<SchoolTeacher>();
                                if (schoolTeacher.name == null || schoolTeacher.picture == null || !schoolTeacher.name.Equals($"{name}") || !schoolTeacher.picture.Equals($"{picture}"))
                                {
                                    schoolTeacher.name = $"{name}";
                                    schoolTeacher.picture = $"{picture}";
                                    await client.GetContainer(Constant.TEAMModelOS, "School").ReplaceItemAsync(schoolTeacher, id, new PartitionKey($"Teacher-{sc.schoolId}"));
                                }
                            }
                        }
                    }

                    //如果包含任何申请，邀请，加入学校的记录 且个人空间未分配2G  则默认分配个人空间至2G.
                    if (teacher.size < 2 && teacher.schools.Count > 0)
                    {
                        teacher.size = 2;
                    }
                    //如果未包含任何申请，邀请，加入学校的记录 且 个人空间没有分配1G 则默认赠送一个G 
                    if (teacher.schools.Count == 0 && teacher.size < 1)
                    {
                        teacher.size = 1;
                    }
                }
                if (string.IsNullOrEmpty(teacher.defaultSchool) && teacher.schools.IsNotEmpty())
                {
                    var tech = teacher.schools.FindAll(x => x.status.Equals("join"));
                    if (tech.IsNotEmpty())
                    {
                        teacher.defaultSchool = teacher.schools[0].schoolId;
                    }
                }
                if (!string.IsNullOrEmpty(teacher.defaultSchool))
                {
                    if (teacher.schools.IsNotEmpty())
                    {
                        var tech = teacher.schools.FindAll(x => x.status.Equals("join") && x.schoolId.Equals(teacher.defaultSchool));
                        if (!tech.IsNotEmpty())
                        {
                            var techde = teacher.schools.FindAll(x => x.status.Equals("join"));
                            if (techde.IsNotEmpty())
                            {
                                teacher.defaultSchool = techde[0].schoolId;
                            }
                            else
                            {
                                teacher.defaultSchool = null;
                            }
                        }
                    }
                    else
                    {
                        teacher.defaultSchool = null;
                    }
                }
                teacher.timezone=timezone;
                await client.GetContainer(Constant.TEAMModelOS, "Teacher").ReplaceItemAsync<Teacher>(teacher, id, new PartitionKey("Base"));
                //預設學校ID
                defaultschool = teacher.defaultSchool;
            }
            catch (CosmosException ex)
            {
                if (ex.Status == 404 && teacher == null)
                {
                    //如果沒有，則初始化Teacher基本資料到Cosmos
                    teacher = new Teacher
                    {
                        createTime = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
                        id = id,
                        pk = "Base",
                        code = "Base",
                        name = name?.ToString(),
                        picture = picture?.ToString(),
                        //创建账号并第一次登录IES5则默认赠送1G
                        size = 1,
                        defaultSchool = null,
                        schools = new List<Teacher.TeacherSchool>(),
                        lang=lang,
                        timezone=timezone,
                    };
                    var container = _azureStorage.GetBlobContainerClient(id);
                    await container.CreateIfNotExistsAsync(PublicAccessType.None); //嘗試創建Teacher私有容器，如存在則不做任何事，保障容器一定存在
                    teacher = await _azureCosmos.GetCosmosClient().GetContainer(Constant.TEAMModelOS, "Teacher").CreateItemAsync<Teacher>(teacher, new PartitionKey("Base"));
                }
            }
            catch (Exception ex)
            {
                throw new Exception($"{ex.Message}\n{ex.StackTrace}");
            }
             
            List<string> roles = new List<string>() { "teacher" };
           
            //換取AuthToken，提供給前端

            //用户在线记录
            //try
            //{
            //    _ = _httpTrigger.RequestHttpTrigger(new { school = defaultschool, scope = $"{Constant.ScopeTeacher}", id = $"{id}", ip = $"{ip}", expire = 1 }, _option.Location, "online-record");
            //}
            //catch { }

            //換取AuthToken，提供給前端
            var auth_token = JwtAuthExtension.CreateAuthToken(_option.HostName, id, name?.ToString(), picture?.ToString(), _option.JwtSecretKey, Website: "IES", timezone: timezone, scope: Constant.ScopeTeacher, standard:  "", roles: roles.ToArray(), expire: 1);

            //取得Teacher Blob 容器位置及SAS 
            await _azureStorage.GetBlobContainerClient(id).CreateIfNotExistsAsync(PublicAccessType.None); //嘗試創建Teacher私有容器，如存在則不做任何事，保障容器一定存在
            var (blob_uri, blob_sas) = _azureStorage.GetBlobContainerSAS(id, BlobContainerSasPermissions.Write | BlobContainerSasPermissions.Read | BlobContainerSasPermissions.List | BlobContainerSasPermissions.Delete);
            return new TeacherInfo
            {
                blob_uri = blob_uri,
                blob_sas = blob_sas,
                defaultschool = defaultschool,
                teacher = teacher,
                auth_token = auth_token,
            };
        }
        public static async Task<TeacherInfo> TeacherInfo(AzureCosmosFactory _azureCosmos, Teacher teacher, string name, string picture, string id,
            AzureStorageFactory _azureStorage, Option _option, AzureRedisFactory _azureRedis, string ip, HttpTrigger _httpTrigger, string lang,int timezone)
        {
            List<object> schools = new List<object>();
            List<AreaDto> areas = new List<AreaDto>();
            string defaultschool = null;
            //TODO 取得Teacher 個人相關數據(課程清單、虛擬教室清單、歷史紀錄清單等)，學校數據另外API處理，多校切換時不同
            var client = _azureCosmos.GetCosmosClient();
            int total = 0;
            int tsize = 0;
            List<Area> areasDbs = new List<Area>();
            List<AreaSetting> areaSettings = new List<AreaSetting>();
            try
            {
                if (teacher == null)
                {
                    teacher = await client.GetContainer(Constant.TEAMModelOS, "Teacher").ReadItemAsync<Teacher>(id, new PartitionKey("Base"));
                    if (!string.IsNullOrWhiteSpace(lang) && string.IsNullOrWhiteSpace(teacher.lang))
                    {
                        teacher.lang = lang;
                    }
                    teacher.name = $"{name}";
                    teacher.picture = $"{picture}";
                }
                else
                {
                    name = teacher.name;
                    picture = teacher.picture;
                    id = teacher.id;
                }
                ///教师的个人空间
                tsize = teacher.size;
                ///教师的总空间 包含 个人空间和学校赠送的空间累加
                total = teacher.size;

                HashSet<string> areaIds = new HashSet<string>();
                if (teacher.areas.IsNotEmpty())
                {
                    teacher.areas.ForEach(x => {
                        areaIds.Add(x.areaId);
                    });

                }
                if (teacher.schools.IsNotEmpty())
                {
                    teacher.schools.ForEach(x => {
                        if (!string.IsNullOrEmpty(x.areaId))
                        {
                            areaIds.Add(x.areaId);
                        }
                    });
                }
                if (areaIds.Count > 0)
                {
                    string queryText = $"select value(c) from c where c.id in ({string.Join(",", areaIds.Select(x => $"'{x}'"))})";
                    await foreach (var item in client.GetContainer(Constant.TEAMModelOS, "Normal").GetItemQueryIteratorSql<Area>(queryText: queryText, requestOptions: new QueryRequestOptions() { PartitionKey = new PartitionKey("Base-Area") }))
                    {
                        areasDbs.Add(item);
                    }
                    await foreach (var item in client.GetContainer(Constant.TEAMModelOS, "Normal").GetItemQueryIteratorSql<AreaSetting>(queryText: queryText, requestOptions: new QueryRequestOptions() { PartitionKey = new PartitionKey("AreaSetting") }))
                    {
                        areaSettings.Add(item);
                    }
                }
                if (teacher.areas.IsNotEmpty())
                {
                    foreach (var areat in teacher.areas)
                    {
                        Area area = areasDbs.Find(x => x.id.Equals(areat.areaId));
                        AreaSetting setting = null;
                        if (area != null)
                        {
                            setting = areaSettings.Find(x => x.id.Equals(areat.areaId));
                        }
                        int access = 0;
                        if (setting != null && !string.IsNullOrWhiteSpace(setting.accessConfig))
                        {
                            access = 1;
                        }
                        if (!string.IsNullOrWhiteSpace(area?.id)) {
                            var container = _azureStorage.GetBlobContainerClient(area?.id);
                            await container.CreateIfNotExistsAsync(PublicAccessType.None); //嘗試創建Teacher私有容器，如存在則不做任何事，保障容器一定存在
                            var blobArea = _azureStorage.GetBlobContainerSAS(area?.id, blobContainerSasPermissions: BlobContainerSasPermissions.Write | BlobContainerSasPermissions.Read | BlobContainerSasPermissions.List | BlobContainerSasPermissions.Delete);
                            //if (setting != null)
                            //{
                            //    setting.accessConfig = null;
                            //}
                            areas.Add(new AreaDto { sas= blobArea.sas, url =blobArea.uri, areaId = area?.id, name = area?.name, standard = area?.standard, standardName = area?.standardName, setting = setting, access = access, shortCode=area.shortCode });
                        }
                    }
                }
                //处理导入时，在学校名单有该教师加入的，但是基本信息没有的 
                string schoolJoinTeacher = $"SELECT value  c.id FROM c join b in c.teachers where c.code='TeacherImport' and b.tmdid='{teacher.id}' and b.status='join'";
                var schoolJoins = await client.GetContainer(Constant.TEAMModelOS, Constant.School).GetList<string>(schoolJoinTeacher, "TeacherImport");
                if (schoolJoins.list.IsNotEmpty())
                {
                    var notInBase = schoolJoins.list.Except(teacher.schools.Select(z => z.schoolId));
                    if (notInBase.Any())
                    {
                        string sqlSchoolBase = $"SELECT value  c  FROM c  where c.id in ({string.Join(",", notInBase.Select(z => $"'{z}'"))})";
                        var schoolBase = await client.GetContainer(Constant.TEAMModelOS, Constant.School).GetList<School>(sqlSchoolBase, "Base");
                        if (schoolBase.list.IsNotEmpty())
                        {
                            var nowtime = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
                            foreach (var school in schoolBase.list)
                            {
                                if (!teacher.schools.Exists(z => z.schoolId.Equals(school.id)))
                                {
                                    teacher.schools.Add(new TeacherSchool { schoolId = school.id, areaId = school.areaId, name = school.name, picture = school.picture, status = "join", time = nowtime });
                                }
                            }
                        }
                    }
                }

                //检查是否有加入学校，如果加入学校，则当个人空间size是0G的时候，则免费获得一个G空间，但无论加入多少个学校，只能获取一次 1G的免费空间。没有加入学校则默认0G空间,除非自己购买空间
                if (teacher.schools.IsNotEmpty())
                {
                    foreach (var sc in teacher.schools)
                    {
                        string statusNow = sc.status != null ? sc.status : "";
                        if (statusNow.Equals("join") || statusNow.Equals("invite") || statusNow.Equals("request"))
                        {
                            dynamic schoolExtobj = new ExpandoObject();
                            schoolExtobj.schoolId = sc.schoolId;
                            schoolExtobj.name = sc.name;
                            schoolExtobj.status = sc.status;
                            schoolExtobj.time = sc.time;
                            schoolExtobj.picture = sc.picture;
                            schoolExtobj.areaId = $"{sc.areaId}";
                            Area area = null;
                            int access = 0;
                            if (!string.IsNullOrEmpty($"{sc.areaId}"))
                            {
                                area = areasDbs.Find(x => x.id.Equals(sc.areaId));
                                AreaSetting setting = null;
                                if (area != null)
                                {
                                    setting = areaSettings.Find(x => x.id.Equals(sc.areaId));
                                }
                                if (setting != null && !string.IsNullOrWhiteSpace(setting.accessConfig))
                                {
                                    access = 1;
                                }
                            }
                            if (area != null)
                            {
                                schoolExtobj.area = new { area.name, area.id, area.institution, area.provName, area.code, area.cityCode, area.cityName, area.standard, area.provCode, area.pk, access };
                            }
                            else
                            {
                                schoolExtobj.area = area;
                            }
                            var sctch = await client.GetContainer(Constant.TEAMModelOS, "School").ReadItemStreamAsync(id, new PartitionKey($"Teacher-{sc.schoolId}"));
                            if (sctch.Status == 200 && sctch != null && sctch.Content != null)
                            {
                                var jsonDoc = await JsonDocument.ParseAsync(sctch.Content);
                                SchoolTeacher schoolTeacher = jsonDoc.RootElement.ToObject<SchoolTeacher>();
                                sc.roles=schoolTeacher.roles;
                                if (schoolTeacher.name == null || schoolTeacher.picture == null || !schoolTeacher.name.Equals($"{name}") || !schoolTeacher.picture.Equals($"{picture}"))
                                {
                                    schoolTeacher.name = $"{name}";
                                    schoolTeacher.picture = $"{picture}";
                                    await client.GetContainer(Constant.TEAMModelOS, "School").ReplaceItemAsync(schoolTeacher, id, new PartitionKey($"Teacher-{sc.schoolId}"));
                                }
                                if (jsonDoc.RootElement.TryGetProperty("size", out JsonElement _size) && _size.ValueKind.Equals(JsonValueKind.Number))
                                {
                                    total += _size.GetInt32();
                                    schoolExtobj.size = _size.GetInt32();
                                }
                                else { schoolExtobj.size = 0; }
                            }
                            else
                            {
                                schoolExtobj.size = 0;
                            }
                            //if (statusNow.Equals("join"))
                            //{
                            //    await TmdUserService.JoinSchool(client, teacher.id, teacher.picture, teacher.name, sc.schoolId, sc.name);
                            //}

                            schoolExtobj.roles= sc.roles;
                            schools.Add(schoolExtobj);
                        }
                    }
                    
                    //如果包含任何申请，邀请，加入学校的记录 且个人空间未分配2G  则默认分配个人空间至2G.
                    if (teacher.size < 2 && teacher.schools.Count > 0)
                    {
                        teacher.size = 2;
                    }
                    //如果未包含任何申请，邀请，加入学校的记录 且 个人空间没有分配1G 则默认赠送一个G 
                    if (teacher.schools.Count == 0 && teacher.size < 1)
                    {
                        teacher.size = 1;
                    }
                }
                if (string.IsNullOrEmpty(teacher.defaultSchool) && teacher.schools.IsNotEmpty())
                {
                    var tech = teacher.schools.FindAll(x => x.status.Equals("join"));
                    if (tech.IsNotEmpty())
                    {
                        teacher.defaultSchool = teacher.schools[0].schoolId;
                    }
                }
                if (!string.IsNullOrEmpty(teacher.defaultSchool))
                {
                    if (teacher.schools.IsNotEmpty())
                    {
                        var tech = teacher.schools.FindAll(x => x.status.Equals("join") && x.schoolId.Equals(teacher.defaultSchool));
                        if (!tech.IsNotEmpty())
                        {
                            var techde = teacher.schools.FindAll(x => x.status.Equals("join"));
                            if (techde.IsNotEmpty())
                            {
                                teacher.defaultSchool = techde[0].schoolId;
                            }
                            else
                            {
                                teacher.defaultSchool = null;
                            }
                        }
                    }
                    else
                    {
                        teacher.defaultSchool = null;
                    }
                }
                teacher.timezone=timezone;
                await client.GetContainer(Constant.TEAMModelOS, "Teacher").ReplaceItemAsync<Teacher>(teacher, id, new PartitionKey("Base"));
                //預設學校ID
                defaultschool = teacher.defaultSchool;
            }
            catch (CosmosException ex)
            {
                if (ex.Status == 404 && teacher == null)
                {
                    //如果沒有，則初始化Teacher基本資料到Cosmos
                    teacher = new Teacher
                    {
                        createTime = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
                        id = id,
                        pk = "Base",
                        code = "Base",
                        name = name?.ToString(),
                        picture = picture?.ToString(),
                        //创建账号并第一次登录IES5则默认赠送1G
                        size = 1,
                        defaultSchool = null,
                        schools = new List<Teacher.TeacherSchool>(),
                        lang=lang,
                        timezone=timezone,
                    };
                    var container = _azureStorage.GetBlobContainerClient(id);
                    await container.CreateIfNotExistsAsync(PublicAccessType.None); //嘗試創建Teacher私有容器，如存在則不做任何事，保障容器一定存在
                    teacher = await _azureCosmos.GetCosmosClient().GetContainer(Constant.TEAMModelOS, "Teacher").CreateItemAsync<Teacher>(teacher, new PartitionKey("Base"));
                    total = teacher.size;
                    tsize = teacher.size;
                }
            }
            catch (Exception ex)
            {
                throw new Exception($"{ex.Message}\n{ex.StackTrace}");
            }
            //私人課程
            List<object> courses = new List<object>();
            await foreach (var item in client.GetContainer(Constant.TEAMModelOS, "Teacher").GetItemQueryStreamIteratorSql(queryText: $"select value(c) from c WHERE c.creatorId = '{id}'", requestOptions: new QueryRequestOptions() { PartitionKey = new PartitionKey($"CourseBase") }))
            {
                using var json = await JsonDocument.ParseAsync(item.Content);
                if (json.RootElement.TryGetProperty("_count", out JsonElement count) && count.GetUInt16() > 0)
                {
                    foreach (var obj in json.RootElement.GetProperty("Documents").EnumerateArray())
                    {
                        courses.Add(obj.ToObject<object>());
                    }
                }
            }
            List<string> roles = new List<string>() { "teacher" };
            Area areaa = null;
            if (areas.Count > 0)
            {
                roles.Add("area");
                if (!string.IsNullOrEmpty($"{areas[0]}"))
                {
                    areaa = areasDbs.Find(x => x.Equals(areas[0].areaId));
                }
            }
            //換取AuthToken，提供給前端
            var auth_token = JwtAuthExtension.CreateAuthToken(_option.HostName, id, name?.ToString(), picture?.ToString(), _option.JwtSecretKey, Website: "IES", timezone: timezone, scope: Constant.ScopeTeacher, standard: areaa != null ? areaa.standard : "", roles: roles.ToArray(), expire: 1);

            //用户在线记录
            //try
            //{
            //    _ = _httpTrigger.RequestHttpTrigger(new { school = defaultschool, scope = $"{Constant.ScopeTeacher}", id = $"{id}", ip = $"{ip}", expire = 1 }, _option.Location, "online-record");
            //}
            //catch { }


            //取得Teacher Blob 容器位置及SAS 
            await _azureStorage.GetBlobContainerClient(id).CreateIfNotExistsAsync(PublicAccessType.None); //嘗試創建Teacher私有容器，如存在則不做任何事，保障容器一定存在
            var (blob_uri, blob_sas) = _azureStorage.GetBlobContainerSAS(id, BlobContainerSasPermissions.Write | BlobContainerSasPermissions.Read | BlobContainerSasPermissions.List | BlobContainerSasPermissions.Delete);
            var (osblob_uri, osblob_sas) = roles.Contains("area") ? _azureStorage.GetBlobContainerSAS("teammodelos", BlobContainerSasPermissions.Write | BlobContainerSasPermissions.Read | BlobContainerSasPermissions.List | BlobContainerSasPermissions.Delete) : _azureStorage.GetBlobContainerSAS("teammodelos", BlobContainerSasPermissions.Read | BlobContainerSasPermissions.List);
            return new TeacherInfo
            {
                auth_token = auth_token,
                blob_uri = blob_uri,
                blob_sas = blob_sas,
                schools = schools,
                defaultschool = defaultschool,
                courses = courses,
                total = total,
                osblob_sas = osblob_sas,
                osblob_uri = osblob_uri,
                tsize = tsize,
                areas = areas,
                teacher = teacher
            };
        }

    }
    public record AreaDto
    {
        //areaId = area.id, name = area.name, area.standard, area.standardName
        public string areaId { get; set; }
        public string name { get; set; }
        public string standard { get; set; }
        public string standardName { get; set; }
        //public string accessConfig { get; set; }
        public AreaSetting setting { get; set; }
        public int access { get; set; } = 0;
        public string shortCode { get; set; }
        public string sas { get; set; }
        public string url { get; set; }
    }
    public record TeacherInfo
    {
        public string auth_token { get; set; }
        public string blob_uri { get; set; }
        public string blob_sas { get; set; }
        public List<object> schools { get; set; } = new List<object>();
        public string defaultschool { get; set; }
        public string defaultschoolPeriod { get; set; }
        public List<object> courses { get; set; } = new List<object>();
        public int total { get; set; }
        public string osblob_uri { get; set; }
        public string osblob_sas { get; set; }
        public int tsize { get; set; }
        public List<AreaDto> areas { get; set; } = new List<AreaDto>();
        public Teacher teacher { get; set; }
    }
}