social-media/backend/src/Web/Features/Contents/Handlers/GetContentsByCreator.cs

using Hutopy.Web.Extensions;
using Hutopy.Web.Features.Contents.Data;
using Hutopy.Web.Features.Contents.Handlers.Models;

namespace Hutopy.Web.Features.Contents.Handlers;

[PublicAPI]
public sealed class GetContentsByCreatorRequest
{
    public Guid CreatorId { get; set; }
    [BindFrom("page_size")] public int PageSize { get; set; } = 10;
    [BindFrom("last_id")] public Guid? LastId { get; set; }
}

[PublicAPI]
public class GetContentsByCreatorHandler(
    ContentDbContext context)
    : Endpoint<GetContentsByCreatorRequest, List<ContentModel>>
{
    public override void Configure()
    {
        Get("/api/contents/creator/{CreatorId:guid}");
        Options(o => o.WithTags("Contents"));
        AllowAnonymous();
    }

    public override async Task HandleAsync(
        GetContentsByCreatorRequest req,
        CancellationToken ct)
    {
        var query = context.Contents
            .Where(c => c.CreatedBy == req.CreatorId && c.DeletedAt == null)
            .OrderByDescending(c => c.CreatedAt);
        
        if (req.LastId.HasValue)
        {
            query = query.Where(c => c.Id > req.LastId.Value)
                .OrderByDescending(c => c.CreatedAt);
        }

        var content = await query
            .Select(c => new ContentModel
            {
                Id = c.Id,
                CreatedBy = c.CreatedBy,
                CreatedByName = c.Creator!.Name,
                CreatedByPortraitUrl = c.Creator.Images.Logo,
                CreatedAt = c.CreatedAt,
                DeletedBy = c.DeletedBy,
                DeletedAt = c.DeletedAt,
                Title = c.Title,
                Description = c.Description,
                Urls = c.Urls,
                ThumbnailUrl = c.ThumbnailUrl,
                HtmlFileUrl = c.HtmlFileUrl ?? "",
                Reactions = c.Reactions.Select(x => new ReactionModel
                {
                    Reaction = x.Reaction.FromEnum(),
                    UserId = x.UserId,
                    UserName = x.UserName
                }).ToList()
            })
            .Take(req.PageSize)
            .ToListAsync(ct);

        await SendAsync(content, cancellation: ct);
    }
}