merge from develop

Tsi1.Api/Tsi1.BusinessLayer/Services/TenantService.cs

-using AutoMapper;
+using AutoMapper;
 using Microsoft.EntityFrameworkCore;
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using Tsi1.BusinessLayer.Dtos;
@@ -79,5 +80,119 @@ namespace Tsi1.BusinessLayer.Services
             return result;
         }
 
+        public async Task<ServiceResult<bool>> Modify(int tenantId, TenantCreateDto tenantDto)
+        {
+            var result = new ServiceResult<bool>();
+
+            var tenant = await _context.Tenants
+                .FirstOrDefaultAsync(x => x.Id == tenantId);
+
+            if (tenant == null)
+            {
+                result.Message = string.Format(ErrorMessages.TenantDoesNotExist, tenantId);
+                return result;
+            }
+
+            _mapper.Map(tenantDto, tenant);
+
+            await _context.SaveChangesAsync();
+
+            result.Data = true;
+
+            return result;
+        }
+
+        public async Task<ServiceResult<bool>> Delete(int tenantId)
+        {
+            var result = new ServiceResult<bool>();
+
+            var tenant = await _context.Tenants
+                .FirstOrDefaultAsync(x => x.Id == tenantId);
+
+            if (tenant == null)
+            {
+                result.Message = string.Format(ErrorMessages.TenantDoesNotExist, tenantId);
+                return result;
+            }
+
+            _context.Tenants.Remove(tenant);
+
+            await _context.SaveChangesAsync();
+
+            result.Data = true;
+
+            return result;
+        }
+
+        public async Task<ServiceResult<List<TenantPreviewDto>>> FacultyList()
+        {
+            var result = new ServiceResult<List<TenantPreviewDto>>();
+
+            var tenants = await _context.Tenants
+                .Include(x => x.Students)
+                .Where(x => x.Name != TenantAdmin.Name)
+                .ToListAsync();
+
+            var tenantDtos = new List<TenantPreviewDto>();
+            foreach (var tenant in tenants)
+            {
+                var tenantDto = _mapper.Map<TenantPreviewDto>(tenant);
+                tenantDto.StudentQuantity = tenant.Students.Count();
+
+                tenantDtos.Add(tenantDto);
+            }
+
+            result.Data = tenantDtos;
+            return result;
+        }
+
+        public async Task<ServiceResult<List<TenantCourseDto>>> CourseList()
+        {
+            var result = new ServiceResult<List<TenantCourseDto>>();
+
+            var tenants = await _context.Tenants
+                .Include(x => x.Courses)
+                    .ThenInclude(x => x.StudentCourses)
+                .Where(x => x.Name != TenantAdmin.Name)
+                .ToListAsync();
+
+            var tenantDtos = new List<TenantCourseDto>();
+            foreach (var tenant in tenants)
+            {
+                var tenantDto = _mapper.Map<TenantCourseDto>(tenant);
+
+                foreach (var course in tenant.Courses)
+                {
+                    var courseDto = _mapper.Map<CoursePreviewDto>(course);
+                    courseDto.StudentQuantity = course.StudentCourses.Count();
+
+                    tenantDto.Courses.Add(courseDto);
+                }
+
+                tenantDtos.Add(tenantDto);
+            }
+
+            result.Data = tenantDtos;
+            return result;
+        }
+
+        public async Task<ServiceResult<int>> GetById(int tenantId)
+        {
+            var result = new ServiceResult<int>();
+
+            var tenant = await _context.Tenants
+                .FirstOrDefaultAsync(x => x.Id == tenantId);
+
+            if (tenant == null)
+            {
+                result.HasError = true;
+                result.Message = string.Format(ErrorMessages.TenantDoesNotExist, tenantId);
+                return result;
+            }
+
+            result.Data = tenant.Id;
+
+            return result;
+        }
     }
 }