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Merge pull request #4 from yazilimacademy/Application
[Feature]: Category/GetAll and Create operations completed.
2 parents 5731171 + b172f6d commit 776c77a

23 files changed

+334
-8
lines changed

‎src/YazilimAcademy.Application/Common/Interfaces/IApplicationDbContext.cs

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using Microsoft.EntityFrameworkCore;
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using YazilimAcademy.Domain.Entities;
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namespace YazilimAcademy.Application.Common.Interfaces;
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public interface IApplicationDbContext
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{
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DbSet<Category> Categories { get; }
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DbSet<Course> Courses { get; }
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DbSet<CourseCategory> CourseCategories { get; }
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DbSet<CourseSection> CourseSections { get; }
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DbSet<CourseLecture> CourseLectures { get; }
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DbSet<CourseLectureResource> CourseLectureResources { get; }
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Task<int> SaveChangesAsync(CancellationToken cancellationToken);
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int SaveChanges();
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}

‎src/YazilimAcademy.Application/Common/Interfaces/ISqlConnectionFactory.cs

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using System.Data;
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namespace YazilimAcademy.Application.Common.Interfaces;
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public interface ISqlConnectionFactory
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{
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IDbConnection CreateConnection();
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}

‎src/YazilimAcademy.Application/Common/Models/Errors/ValidationError.cs

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namespace YazilimAcademy.Application.Common.Models.Errors;
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public sealed record ValidationError
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{
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public string PropertyName { get; init; }
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public IEnumerable<string> ErrorMessages { get; init; }
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public ValidationError(string propertyName, IEnumerable<string> errorMessages)
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{
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PropertyName = propertyName;
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ErrorMessages = errorMessages;
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}
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public ValidationError(string propertyName, string errorMessage)
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: this(propertyName, new List<string> { errorMessage })
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{
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}
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}

‎src/YazilimAcademy.Application/Common/Models/Pagination/PaginatedList.cs

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using System.Text.Json.Serialization;
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using Microsoft.EntityFrameworkCore;
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namespace YazilimAcademy.Application.Common.Models.Pagination;
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public sealed record PaginatedList<T>
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{
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public IReadOnlyCollection<T> Items { get; }
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public int PageNumber { get; }
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public int TotalPages { get; }
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public int TotalCount { get; }
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public int PageSize { get; set; }
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public PaginatedList(IEnumerable<T> items, int totalCount, int pageNumber, int pageSize)
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{
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Items = items.ToList().AsReadOnly();
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TotalCount = totalCount;
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PageNumber = pageNumber;
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PageSize = pageSize;
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TotalPages = (int)Math.Ceiling(totalCount / (double)pageSize);
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}
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[JsonConstructor]
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public PaginatedList(IReadOnlyCollection<T> items, int totalCount, int pageNumber, int pageSize)
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{
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PageNumber = pageNumber;
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TotalPages = (int)Math.Ceiling(totalCount / (double)pageSize);
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TotalCount = totalCount;
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Items = items;
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PageSize = pageSize;
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}
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public bool HasPreviousPage => PageNumber > 1;
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public bool HasNextPage => PageNumber < TotalPages;
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public static async Task<PaginatedList<T>> CreateAsync(IQueryable<T> source, int pageNumber, int pageSize)
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{
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var count = await source.CountAsync();
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var items = await source
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.Skip((pageNumber - 1) * pageSize)
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.Take(pageSize)
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.ToListAsync();
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return new PaginatedList<T>(items, count, pageNumber, pageSize);
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}
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public static PaginatedList<T> Create(IEnumerable<T> source, int pageNumber, int pageSize)
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{
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var count = source.Count();
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var items = source.Skip((pageNumber - 1) * pageSize).Take(pageSize).ToList();
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return new PaginatedList<T>(items, count, pageNumber, pageSize);
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}
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public static PaginatedList<T> Create(List<T> source, int totalCount, int pageNumber, int pageSize)
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{
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return new PaginatedList<T>(source, totalCount, pageNumber, pageSize);
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}
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}

‎src/YazilimAcademy.Application/Common/Models/Responses/ResponseDto.cs

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using YazilimAcademy.Application.Common.Models.Errors;
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namespace YazilimAcademy.Application.Common.Models.Responses;
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public sealed record ResponseDto<T>
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{
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public T? Data { get; init; }
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public string? Message { get; init; }
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public bool IsSuccess { get; init; }
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public IReadOnlyList<ValidationError> ValidationErrors { get; init; }
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public ResponseDto(T? data, string? message, bool isSuccess, IReadOnlyList<ValidationError>? validationErrors = null)
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{
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Data = data;
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Message = message;
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IsSuccess = isSuccess;
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ValidationErrors = validationErrors ?? Array.Empty<ValidationError>();
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}
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public static ResponseDto<T> Success(T data, string message)
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=> new(data, message, true);
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public static ResponseDto<T?> Success(string message)
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=> new(default, message, true);
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public static ResponseDto<T> Error(string message, List<ValidationError>? validationErrors = null)
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=> new(default, message, false, validationErrors);
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public static ResponseDto<T> Error(string message, ValidationError validationError)
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=> new(default, message, false, new[] { validationError });
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}
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‎src/YazilimAcademy.Application/Features/Categories/Commands/Create/CreateCategoryCommand.cs

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using MediatR;
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namespace YazilimAcademy.Application.Features.Categories.Commands.Create;
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public sealed record CreateCategoryCommand(string Name, string Description) : IRequest<Guid>;

‎src/YazilimAcademy.Application/Features/Categories/Commands/Create/CreateCategoryCommandHandler.cs

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using System;
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using MediatR;
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using YazilimAcademy.Application.Common.Interfaces;
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using YazilimAcademy.Domain.Entities;
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namespace YazilimAcademy.Application.Features.Categories.Commands.Create;
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public sealed class CreateCategoryCommandHandler : IRequestHandler<CreateCategoryCommand, Guid>
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{
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private readonly IApplicationDbContext _dbContext;
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public CreateCategoryCommandHandler(IApplicationDbContext dbContext)
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{
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_dbContext = dbContext;
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}
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public async Task<Guid> Handle(CreateCategoryCommand request, CancellationToken cancellationToken)
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{
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var category = Category.Create(request.Name, request.Description);
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_dbContext.Categories.Add(category);
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await _dbContext.SaveChangesAsync(cancellationToken);
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return category.Id;
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}
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}

‎src/YazilimAcademy.Application/Features/Categories/Commands/Create/CreateCategoryCommandValidator.cs

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using System;
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using FluentValidation;
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using Microsoft.EntityFrameworkCore;
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using YazilimAcademy.Application.Common.Interfaces;
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namespace YazilimAcademy.Application.Features.Categories.Commands.Create;
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public sealed class CreateCategoryCommandValidator : AbstractValidator<CreateCategoryCommand>
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{
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private readonly IApplicationDbContext _dbContext;
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public CreateCategoryCommandValidator(IApplicationDbContext dbContext)
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{
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_dbContext = dbContext;
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RuleFor(c => c.Name)
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.NotEmpty()
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.WithMessage("Kategori adı boş olamaz.")
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.MaximumLength(100)
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.WithMessage("Kategori adı en fazla 100 karakter olmalıdır.")
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.MinimumLength(3)
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.WithMessage("Kategori adı en az 3 karakter olmalıdır.");
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RuleFor(c => c.Description)
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.NotEmpty()
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.When(c => !string.IsNullOrWhiteSpace(c.Description))
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.WithMessage("Kategori açıklaması boş olamaz.")
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.MaximumLength(1000)
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.WithMessage("Kategori açıklaması en fazla 1000 karakter olmalıdır.")
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.MinimumLength(10)
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.WithMessage("Kategori açıklaması en az 10 karakter olmalıdır.");
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RuleFor(c => c.Name)
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.MustAsync(IsCategoryNameUniqueAsync)
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.WithMessage("Bu kategori adı zaten mevcuttur.");
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}
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private async Task<bool> IsCategoryNameUniqueAsync(string name, CancellationToken cancellationToken)
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{
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return !await _dbContext
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.Categories
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.AnyAsync(c => c.Name.ToLower() == name.ToLower(), cancellationToken);
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}
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}

‎src/YazilimAcademy.Application/Features/Categories/Queries/GetAll/GetAllCategoriesDto.cs

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namespace YazilimAcademy.Application.Features.Categories.Queries.GetAll;
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public sealed record GetAllCategoriesDto
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{
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public Guid Id { get; set; }
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public string Name { get; set; }
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public GetAllCategoriesDto(Guid id, string name)
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{
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Id = id;
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Name = name;
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}
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}

‎src/YazilimAcademy.Application/Features/Categories/Queries/GetAll/GetAllCategoriesQuery.cs

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using MediatR;
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using YazilimAcademy.Application.Common.Models.Pagination;
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namespace YazilimAcademy.Application.Features.Categories.Queries.GetAll;
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public sealed record GetAllCategoriesQuery(int PageNumber, int PageSize) : IRequest<PaginatedList<GetAllCategoriesDto>>;

‎src/YazilimAcademy.Application/Features/Categories/Queries/GetAll/GetAllCategoriesQueryHandler.cs

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using Dapper;
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using MediatR;
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using YazilimAcademy.Application.Common.Interfaces;
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using YazilimAcademy.Application.Common.Models.Pagination;
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namespace YazilimAcademy.Application.Features.Categories.Queries.GetAll;
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public sealed class GetAllCategoriesQueryHandler : IRequestHandler<GetAllCategoriesQuery, PaginatedList<GetAllCategoriesDto>>
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{
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private readonly ISqlConnectionFactory _sqlConnectionFactory;
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public GetAllCategoriesQueryHandler(ISqlConnectionFactory sqlConnectionFactory)
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{
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_sqlConnectionFactory = sqlConnectionFactory;
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}
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public async Task<PaginatedList<GetAllCategoriesDto>> Handle(GetAllCategoriesQuery request, CancellationToken cancellationToken)
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{
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var connection = _sqlConnectionFactory.CreateConnection();
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var offset = (request.PageNumber - 1) * request.PageSize;
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var pageSize = request.PageSize;
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var sql = @"
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SELECT COUNT(*) FROM ""categories"";
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SELECT ""Id"", ""Name""
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FROM ""categories""
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ORDER BY ""Name""
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OFFSET @Offset LIMIT @PageSize;
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";
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using var multi = await connection.QueryMultipleAsync(sql, new { Offset = offset, PageSize = pageSize });
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var totalCount = await multi.ReadSingleAsync<int>();
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var categories = (await multi.ReadAsync<GetAllCategoriesDto>()).ToList();
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return new PaginatedList<GetAllCategoriesDto>(categories, totalCount, request.PageNumber, request.PageSize);
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}
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}

‎src/YazilimAcademy.Application/Features/Categories/Queries/GetAll/GetAllCategoriesQueryValidator.cs

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using FluentValidation;
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namespace YazilimAcademy.Application.Features.Categories.Queries.GetAll;
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public sealed class GetAllCategoriesQueryValidator : AbstractValidator<GetAllCategoriesQuery>
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{
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public GetAllCategoriesQueryValidator()
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{
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RuleFor(x => x.PageNumber)
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.GreaterThan(0)
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.WithMessage("Sayfa numarası 1'den küçük olamaz.");
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RuleFor(x => x.PageSize)
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.GreaterThan(0)
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.WithMessage("Sayfa boyutu 1'den küçük olamaz.")
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.LessThan(100)
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.WithMessage("Sayfa boyutu 100'den büyük olamaz.");
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}
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}

‎src/YazilimAcademy.Application/YazilimAcademy.Application.csproj

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<ProjectReference Include="..\YazilimAcademy.Domain\YazilimAcademy.Domain.csproj" />
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Dapper" Version="2.1.35" />
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<PackageReference Include="FluentValidation.DependencyInjectionExtensions" Version="11.11.0" />
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<PackageReference Include="MediatR" Version="12.4.1" />
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<PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.0" />
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</ItemGroup>
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<ItemGroup>
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<Folder Include="Features\Categories\Queries\GetById\" />
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</ItemGroup>
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</Project>

‎src/YazilimAcademy.Domain/Entities/Category.cs

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namespace YazilimAcademy.Domain.Entities;
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public class Category : EntityBase
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public sealed class Category : EntityBase
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{
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public string Name { get; private set; }
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public string? Description { get; private set; }

‎src/YazilimAcademy.Domain/Entities/Course.cs

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namespace YazilimAcademy.Domain.Entities;
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public class Course : EntityBase
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public sealed class Course : EntityBase
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{
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public string Title { get; private set; }
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public string? SubTitle { get; private set; }

‎src/YazilimAcademy.Domain/Entities/CourseCategory.cs

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namespace YazilimAcademy.Domain.Entities;
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public class CourseCategory : EntityBase
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public sealed class CourseCategory : EntityBase
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{
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public Guid CourseId { get; set; }
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public Course Course { get; set; }

‎src/YazilimAcademy.Domain/Entities/CourseLecture.cs

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namespace YazilimAcademy.Domain.Entities;
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public class CourseLecture : EntityBase
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public sealed class CourseLecture : EntityBase
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{
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public Guid SectionId { get; set; }
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public CourseSection Section { get; set; }

‎src/YazilimAcademy.Domain/Entities/CourseLectureResource.cs

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namespace YazilimAcademy.Domain.Entities;
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public class CourseLectureResource : EntityBase
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public sealed class CourseLectureResource : EntityBase
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{
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public Guid LectureId { get; set; }
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public CourseLecture Lecture { get; set; }

‎src/YazilimAcademy.Domain/Entities/CourseSection.cs

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namespace YazilimAcademy.Domain.Entities;
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public class CourseSection : EntityBase
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public sealed class CourseSection : EntityBase
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{
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public Guid CourseId { get; set; }
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public Course Course { get; set; }

‎src/YazilimAcademy.Domain/Entities/User.cs

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namespace YazilimAcademy.Domain.Entities;
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public class User : EntityBase
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public sealed class User : EntityBase
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{
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public Email Email { get; set; }
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public FullName FullName { get; set; }

‎src/YazilimAcademy.Domain/YazilimAcademy.Domain.csproj

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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="IdGen" Version="3.0.7" />
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<PackageReference Include="MediatR.Contracts" Version="2.0.1" />
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</ItemGroup>
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</Project>

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