ReC/src/ReC.Application/Results/Queries/ReadResultViewQuery.cs

using AutoMapper;
using DigitalData.Core.Abstraction.Application.Repository;
using DigitalData.Core.Exceptions;
using MediatR;
using Microsoft.EntityFrameworkCore;
using ReC.Application.Common.Dto;
using ReC.Domain.Views;
using System.Text.Json;

namespace ReC.Application.Results.Queries;

public record ReadResultViewQuery : IRequest<IEnumerable<ResultViewDto>>
{
    public long? Id { get; init; } = null;

    public long? ActionId { get; init; } = null;

    public long? ProfileId { get; init; } = null;

    public bool IncludeAction { get; init; } = true;

    public bool IncludeProfile { get; init; } = false;

    public bool Last { get; init; } = false;
}

public class ReadResultViewQueryHandler(IRepository<ResultView> repo, IMapper mapper) : IRequestHandler<ReadResultViewQuery, IEnumerable<ResultViewDto>>
{
    public async Task<IEnumerable<ResultViewDto>> Handle(ReadResultViewQuery request, CancellationToken cancel)
    {
        var q = repo.Query;

        if(request.Id is long id)
            q = q.Where(rv => rv.Id == id);

        if(request.ActionId is long actionId)
            q = q.Where(rv => rv.ActionId == actionId);

        if(request.ProfileId is long profileId)
            q = q.Where(rv => rv.ProfileId == profileId);

        if(request.IncludeAction)
            q = q.Include(rv => rv.Action);

        if(request.IncludeProfile)
            q = q.Include(rv => rv.Profile);

        var entities = request.Last ? [await q.OrderBy(rv => rv.AddedWhen).LastOrDefaultAsync(cancel)] : await q.ToListAsync(cancel);

        if (entities.Count == 0)
            throw new NotFoundException($"No result views found for the given criteria. Criteria: {
                JsonSerializer.Serialize(request, options: new()
                {
                    PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
                    WriteIndented = true
                })}"
            );

        return mapper.Map<IEnumerable<ResultViewDto>>(entities);
    }
}