add endpoint AddProfessorToCourse

Tsi1.Api/Tsi1.Api/Controllers/CourseController.cs

@@ -73,5 +73,18 @@ namespace Tsi1.Api.Controllers
 
             return Ok();
         }
+
+        [Authorize(Roles = UserTypes.FacultyAdmin)]
+        [HttpPost("AddProfessorToCourse")]
+        public async Task<IActionResult> AddProfessorToCourse(ProfessorCourseDto professorCourseDto)
+        {
+            var result = await _courseService.AddProfessorToCourse(professorCourseDto);
+            if (result.HasError)
+            {
+                return BadRequest(result.Message);
+            }
+
+            return Ok();
+        }
     }
 }

Tsi1.Api/Tsi1.BusinessLayer/Dtos/ProfessorCourseDto.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Tsi1.BusinessLayer.Dtos
+{
+    public class ProfessorCourseDto
+    {
+        public int UserId { get; set; }
+
+        public int CourseId { get; set; }
+    }
+}

Tsi1.Api/Tsi1.BusinessLayer/Helpers/ErrorMessages.cs

@@ -10,8 +10,10 @@ namespace Tsi1.BusinessLayer.Helpers
         public const string IncorrectPassword = "Contraseña incorrecta";
         public const string UserTypeDoesNotExist = "El tipo de usuario con id '{0}' no existe";
         public const string StudentDoesNotExist = "El estudiante con Id de usuario: '{0}' no existe";
+        public const string StudentCourseAlreadyExists = "El estudiante '{0}' ya se encuentra matriculado en el curso '{1}'";
         public const string ProffesorDoesNotExist = "El profesor con Id de usuario: '{0}' no existe";
-
+        public const string ProfessorCourseAlreadyExists = "El profesor '{0}' ya es docente del curso '{1}'";
+        
 
         public const string ForumDoesNotExist = "El foro con id '{0}' no existe";
         public const string DuplicateForumName = "Ya existe un foro con nombre '{0}'";

Tsi1.Api/Tsi1.BusinessLayer/Interfaces/ICourseService.cs

@@ -15,5 +15,7 @@ namespace Tsi1.BusinessLayer.Interfaces
         Task<ServiceResult<Course>> Create(CourseCreateDto newCourse);
 
         Task<ServiceResult<bool>> Matriculate(int userId, int courseId);
+
+        Task<ServiceResult<bool>> AddProfessorToCourse(ProfessorCourseDto professorCourseDto);
     }
 }

Tsi1.Api/Tsi1.BusinessLayer/Services/CourseService.cs

@@ -102,13 +102,69 @@ namespace Tsi1.BusinessLayer.Services
 
             var studentCourse = new StudentCourse
             {
-                CourseId = courseId,
-                StudentId = user.Student.Id
+                Course = course,
+                Student = user.Student
             };
 
             _context.StudentCourses.Add(studentCourse);
 
-            await _context.SaveChangesAsync();
+            try
+            {
+                await _context.SaveChangesAsync();
+            }
+            catch (DbUpdateException)
+            {
+                result.HasError = true;
+                result.Message = string.Format(ErrorMessages.StudentCourseAlreadyExists, user.Username, course.Name);
+                return result;
+            }
+
+            return result;
+        }
+
+        public async Task<ServiceResult<bool>> AddProfessorToCourse(ProfessorCourseDto professorCourseDto)
+        {
+            var result = new ServiceResult<bool>();
+
+            var user = await _context.Users
+                .Include(x => x.Professor)
+                .FirstOrDefaultAsync(x => x.Id == professorCourseDto.UserId);
+
+            if (user == null || user.Professor == null)
+            {
+                result.HasError = true;
+                result.Message = string.Format(ErrorMessages.UserDoesNotExist, user.Username);
+                return result;
+            }
+
+            var course = await _context.Courses
+                .FirstOrDefaultAsync(x => x.Id == professorCourseDto.CourseId);
+
+            if (course == null)
+            {
+                result.HasError = true;
+                result.Message = string.Format(ErrorMessages.CourseDoesNotExist, professorCourseDto.CourseId);
+                return result;
+            }
+
+            var professorCourse = new ProfessorCourse
+            {
+                Course = course,
+                Professor = user.Professor
+            };
+
+            _context.ProfessorCourses.Add(professorCourse);
+
+            try
+            {
+                await _context.SaveChangesAsync();
+            }
+            catch (DbUpdateException)
+            {
+                result.HasError = true;
+                result.Message = string.Format(ErrorMessages.ProfessorCourseAlreadyExists, user.Username, course.Name);
+                return result;
+            }
 
             return result;
         }