From b9b34a29e8cd35dca7ee5f30708abf4395ba9e76 Mon Sep 17 00:00:00 2001
From: Polianin Nikita <nikitkapolyanin@yandex.ru>
Date: Thu, 25 Jan 2024 17:35:15 +0300
Subject: [PATCH] feat: add a group command

---
 .../CreateGroup/CreateGroupCommand.cs         |  9 ++++++
 .../CreateGroup/CreateGroupCommandHandler.cs  | 30 +++++++++++++++++++
 .../UpdateGroup/UpdateGroupCommand.cs         |  9 ++++++
 .../UpdateGroup/UpdateGroupCommandHandler.cs  | 20 +++++++++++++
 4 files changed, 68 insertions(+)
 create mode 100644 Application/Cqrs/Group/Commands/CreateGroup/CreateGroupCommand.cs
 create mode 100644 Application/Cqrs/Group/Commands/CreateGroup/CreateGroupCommandHandler.cs
 create mode 100644 Application/Cqrs/Group/Commands/UpdateGroup/UpdateGroupCommand.cs
 create mode 100644 Application/Cqrs/Group/Commands/UpdateGroup/UpdateGroupCommandHandler.cs

diff --git a/Application/Cqrs/Group/Commands/CreateGroup/CreateGroupCommand.cs b/Application/Cqrs/Group/Commands/CreateGroup/CreateGroupCommand.cs
new file mode 100644
index 0000000..33a42cd
--- /dev/null
+++ b/Application/Cqrs/Group/Commands/CreateGroup/CreateGroupCommand.cs
@@ -0,0 +1,9 @@
+using MediatR;
+
+namespace Mirea.Api.DataAccess.Application.Cqrs.Group.Commands.CreateGroup;
+
+public class CreateGroupCommand : IRequest<int>
+{
+    public required string Name { get; set; }
+    public int? FacultyId { get; set; }
+}
\ No newline at end of file
diff --git a/Application/Cqrs/Group/Commands/CreateGroup/CreateGroupCommandHandler.cs b/Application/Cqrs/Group/Commands/CreateGroup/CreateGroupCommandHandler.cs
new file mode 100644
index 0000000..30e556e
--- /dev/null
+++ b/Application/Cqrs/Group/Commands/CreateGroup/CreateGroupCommandHandler.cs
@@ -0,0 +1,30 @@
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using Mirea.Api.DataAccess.Application.Common.Exceptions;
+using Mirea.Api.DataAccess.Application.Interfaces.DbContexts.Schedule;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Mirea.Api.DataAccess.Application.Cqrs.Group.Commands.CreateGroup;
+
+public class CreateGroupCommandHandler(IGroupDbContext dbContext) : IRequestHandler<CreateGroupCommand, int>
+{
+    public async Task<int> Handle(CreateGroupCommand request, CancellationToken cancellationToken)
+    {
+        var entity = await dbContext.Groups.FirstOrDefaultAsync(g => g.Name == request.Name, cancellationToken: cancellationToken);
+
+        if (entity != null)
+            throw new RecordExistException(typeof(Domain.Schedule.Group), nameof(Domain.Schedule.Group.Name), entity.Id);
+
+        var group = new Domain.Schedule.Group()
+        {
+            Name = request.Name,
+            FacultyId = request.FacultyId
+        };
+
+        var result = await dbContext.Groups.AddAsync(group, cancellationToken);
+        await dbContext.SaveChangesAsync(cancellationToken);
+
+        return result.Entity.Id;
+    }
+}
\ No newline at end of file
diff --git a/Application/Cqrs/Group/Commands/UpdateGroup/UpdateGroupCommand.cs b/Application/Cqrs/Group/Commands/UpdateGroup/UpdateGroupCommand.cs
new file mode 100644
index 0000000..497b7f6
--- /dev/null
+++ b/Application/Cqrs/Group/Commands/UpdateGroup/UpdateGroupCommand.cs
@@ -0,0 +1,9 @@
+using MediatR;
+
+namespace Mirea.Api.DataAccess.Application.Cqrs.Group.Commands.UpdateGroup;
+
+public class UpdateGroupCommand : IRequest
+{
+    public required int Id { get; set; }
+    public required int FacultyId { get; set; }
+}
\ No newline at end of file
diff --git a/Application/Cqrs/Group/Commands/UpdateGroup/UpdateGroupCommandHandler.cs b/Application/Cqrs/Group/Commands/UpdateGroup/UpdateGroupCommandHandler.cs
new file mode 100644
index 0000000..7f2c0f4
--- /dev/null
+++ b/Application/Cqrs/Group/Commands/UpdateGroup/UpdateGroupCommandHandler.cs
@@ -0,0 +1,20 @@
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using Mirea.Api.DataAccess.Application.Common.Exceptions;
+using Mirea.Api.DataAccess.Application.Interfaces.DbContexts.Schedule;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Mirea.Api.DataAccess.Application.Cqrs.Group.Commands.UpdateGroup;
+
+public class UpdateGroupCommandHandler(IGroupDbContext dbContext) : IRequestHandler<UpdateGroupCommand>
+{
+    public async Task Handle(UpdateGroupCommand request, CancellationToken cancellationToken)
+    {
+        var entity = await dbContext.Groups.FirstOrDefaultAsync(g => g.Id == request.Id, cancellationToken: cancellationToken) ?? throw new NotFoundException(typeof(Domain.Schedule.Group), nameof(Domain.Schedule.Group.Id), request.Id);
+
+        entity.FacultyId = request.FacultyId;
+
+        await dbContext.SaveChangesAsync(cancellationToken);
+    }
+}
\ No newline at end of file