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start working on commenting a link

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This commit is contained in:
YuukanOO 2020-12-10 18:37:46 +01:00
parent 9650d6dc86
commit d8e832ba81
12 changed files with 306 additions and 6 deletions
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15
Application/CommentLink/CommentLinkCommand.cs Normal file
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@ -0,0 +1,15 @@
using System;
using System.ComponentModel.DataAnnotations;
using MediatR;
namespace HN.Application
{
public sealed class CommentLinkCommand : IRequest<Guid>
{
[Required]
public Guid LinkId { get; set; }
[Required]
public string Content { get; set; }
}
}

30
Application/CommentLink/CommentLinkCommandHandler.cs Normal file
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@ -0,0 +1,30 @@
using System;
using System.Threading;
using System.Threading.Tasks;
using HN.Domain;
using MediatR;
namespace HN.Application
{
public sealed class CommentLinkCommandHandler : IRequestHandler<CommentLinkCommand, Guid>
{
private readonly ILinkRepository _linkRepository;
private readonly ICommentRepository _commentRepository;
public CommentLinkCommandHandler(ILinkRepository linkRepository, ICommentRepository commentRepository)
{
_linkRepository = linkRepository;
_commentRepository = commentRepository;
}
public async Task<Guid> Handle(CommentLinkCommand request, CancellationToken cancellationToken)
{
var link = await _linkRepository.GetByIdAsync(request.LinkId);
var comment = link.AddComment(request.Content);
await _commentRepository.AddAsync(comment);
return comment.Id;
}
}
}

3
Apps/Website/Startup.cs
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@ -27,7 +27,8 @@ namespace Website
services.AddDbContext<HNDbContext>(options => options.UseSqlite(Configuration.GetConnectionString("Default")));
services.AddScoped<IDbContext, HNDbContext>();
services.AddScoped<ILinkRepository, LinkRepository>();
services.AddMediatR(typeof(HN.Application.AddLinkCommand));
services.AddScoped<ICommentRepository, CommentRepository>();
services.AddMediatR(typeof(HN.Application.IDbContext));
services.Configure<RouteOptions>(options =>
{

20
Domain/Comment.cs Normal file
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@ -0,0 +1,20 @@
using System;
namespace HN.Domain
{
public sealed class Comment
{
public Guid Id { get; private set; }
public Guid LinkId { get; private set; }
public string Content { get; private set; }
public DateTime CreatedAt { get; private set; }
internal Comment(Guid linkId, string content)
{
Id = Guid.NewGuid();
LinkId = linkId;
Content = content;
CreatedAt = DateTime.UtcNow;
}
}
}

9
Domain/ICommentRepository.cs Normal file
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@ -0,0 +1,9 @@
using System.Threading.Tasks;
namespace HN.Domain
{
public interface ICommentRepository
{
Task AddAsync(Comment comment);
}
}

5
Domain/Link.cs
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@ -33,5 +33,10 @@ namespace HN.Domain
{
_votes.Add(new Vote(VoteType.Down));
}
public Comment AddComment(string content)
{
return new Comment(Id, content);
}
}
}

17
Infrastructure/CommentRepository.cs Normal file
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@ -0,0 +1,17 @@
using System.Threading.Tasks;
using HN.Domain;
namespace HN.Infrastructure
{
public sealed class CommentRepository : Repository<Comment>, ICommentRepository
{
public CommentRepository(HNDbContext context) : base(context)
{
}
public Task AddAsync(Comment comment)
{
return base.AddAsync(comment);
}
}
}

22
Infrastructure/EntityTypes/CommentEntityType.cs Normal file
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@ -0,0 +1,22 @@
using HN.Domain;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
namespace HN.Infrastructure
{
public sealed class CommentEntityType : IEntityTypeConfiguration<Comment>
{
public void Configure(EntityTypeBuilder<Comment> builder)
{
builder.ToTable("comments");
builder.HasKey(o => o.Id);
builder.HasOne<Link>()
.WithMany()
.HasForeignKey(o => o.LinkId)
.IsRequired();
builder.Property(o => o.Content).IsRequired();
builder.Property(o => o.CreatedAt).IsRequired();
}
}
}

10
Infrastructure/LinkRepository.cs
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@ -11,19 +11,19 @@ namespace HN.Infrastructure
{
}
public async Task AddAsync(Link link)
public Task AddAsync(Link link)
{
await base.AddAsync(link);
return base.AddAsync(link);
}
public Task<Link> GetByIdAsync(Guid id)
{
return Entries.SingleOrDefaultAsync(o => o.Id == id);
return Entries.Include(l => l.Votes).SingleOrDefaultAsync(o => o.Id == id);
}
public async Task UpdateAsync(Link link)
public Task UpdateAsync(Link link)
{
await base.UpdateAsync(link);
return base.UpdateAsync(link);
}
}
}

107
Infrastructure/Migrations/20201210171100_CreateComment.Designer.cs generated Normal file
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@ -0,0 +1,107 @@
// <auto-generated />
using System;
using HN.Infrastructure;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.EntityFrameworkCore.Migrations;
using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
namespace Infrastructure.Migrations
{
[DbContext(typeof(HNDbContext))]
[Migration("20201210171100_CreateComment")]
partial class CreateComment
{
protected override void BuildTargetModel(ModelBuilder modelBuilder)
{
#pragma warning disable 612, 618
modelBuilder
.HasAnnotation("ProductVersion", "5.0.0");
modelBuilder.Entity("HN.Domain.Comment", b =>
{
b.Property<Guid>("Id")
.ValueGeneratedOnAdd()
.HasColumnType("TEXT");
b.Property<string>("Content")
.IsRequired()
.HasColumnType("TEXT");
b.Property<DateTime>("CreatedAt")
.HasColumnType("TEXT");
b.Property<Guid>("LinkId")
.HasColumnType("TEXT");
b.HasKey("Id");
b.HasIndex("LinkId");
b.ToTable("comments");
});
modelBuilder.Entity("HN.Domain.Link", b =>
{
b.Property<Guid>("Id")
.ValueGeneratedOnAdd()
.HasColumnType("TEXT");
b.Property<DateTime>("CreatedAt")
.HasColumnType("TEXT");
b.Property<string>("Url")
.IsRequired()
.HasMaxLength(500)
.HasColumnType("TEXT");
b.HasKey("Id");
b.HasIndex("Url")
.IsUnique();
b.ToTable("links");
});
modelBuilder.Entity("HN.Domain.Vote", b =>
{
b.Property<Guid>("LinkId")
.HasColumnType("TEXT");
b.Property<DateTime>("CreatedAt")
.HasColumnType("TEXT");
b.Property<int>("Type")
.HasColumnType("INTEGER");
b.HasKey("LinkId");
b.ToTable("link_votes");
});
modelBuilder.Entity("HN.Domain.Comment", b =>
{
b.HasOne("HN.Domain.Link", null)
.WithMany()
.HasForeignKey("LinkId")
.OnDelete(DeleteBehavior.Cascade)
.IsRequired();
});
modelBuilder.Entity("HN.Domain.Vote", b =>
{
b.HasOne("HN.Domain.Link", null)
.WithMany("Votes")
.HasForeignKey("LinkId")
.OnDelete(DeleteBehavior.Cascade)
.IsRequired();
});
modelBuilder.Entity("HN.Domain.Link", b =>
{
b.Navigation("Votes");
});
#pragma warning restore 612, 618
}
}
}

42
Infrastructure/Migrations/20201210171100_CreateComment.cs Normal file
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@ -0,0 +1,42 @@
using System;
using Microsoft.EntityFrameworkCore.Migrations;
namespace Infrastructure.Migrations
{
public partial class CreateComment : Migration
{
protected override void Up(MigrationBuilder migrationBuilder)
{
migrationBuilder.CreateTable(
name: "comments",
columns: table => new
{
Id = table.Column<Guid>(type: "TEXT", nullable: false),
LinkId = table.Column<Guid>(type: "TEXT", nullable: false),
Content = table.Column<string>(type: "TEXT", nullable: false),
CreatedAt = table.Column<DateTime>(type: "TEXT", nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_comments", x => x.Id);
table.ForeignKey(
name: "FK_comments_links_LinkId",
column: x => x.LinkId,
principalTable: "links",
principalColumn: "Id",
onDelete: ReferentialAction.Cascade);
});
migrationBuilder.CreateIndex(
name: "IX_comments_LinkId",
table: "comments",
column: "LinkId");
}
protected override void Down(MigrationBuilder migrationBuilder)
{
migrationBuilder.DropTable(
name: "comments");
}
}
}

32
Infrastructure/Migrations/HNDbContextModelSnapshot.cs
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@ -16,6 +16,29 @@ namespace Infrastructure.Migrations
modelBuilder
.HasAnnotation("ProductVersion", "5.0.0");
modelBuilder.Entity("HN.Domain.Comment", b =>
{
b.Property<Guid>("Id")
.ValueGeneratedOnAdd()
.HasColumnType("TEXT");
b.Property<string>("Content")
.IsRequired()
.HasColumnType("TEXT");
b.Property<DateTime>("CreatedAt")
.HasColumnType("TEXT");
b.Property<Guid>("LinkId")
.HasColumnType("TEXT");
b.HasKey("Id");
b.HasIndex("LinkId");
b.ToTable("comments");
});
modelBuilder.Entity("HN.Domain.Link", b =>
{
b.Property<Guid>("Id")
@ -54,6 +77,15 @@ namespace Infrastructure.Migrations
b.ToTable("link_votes");
});
modelBuilder.Entity("HN.Domain.Comment", b =>
{
b.HasOne("HN.Domain.Link", null)
.WithMany()
.HasForeignKey("LinkId")
.OnDelete(DeleteBehavior.Cascade)
.IsRequired();
});
modelBuilder.Entity("HN.Domain.Vote", b =>
{
b.HasOne("HN.Domain.Link", null)