system-praktyk-api/src/InternshipSystem.Core/Entity/Internship/InternshipRegistration.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using FluentValidation;
using InternshipSystem.Core.UglyOrmArtifacts;

namespace InternshipSystem.Core.Entity.Internship
{
    public class InternshipRegistration
    {
        public long Id { get; set; }
        public Company Company { get; set; }
        public BranchOffice BranchAddress { get; set; }
        public DateTime Start { get; set; }
        public DateTime End { get; set; }
        public Mentor Mentor { get; set; }
        public List<ProgramSubject> Subjects { get; set; }
        public InternshipType Type { get; set; }

        public int DeclaredHours { get; set; }
        public DocumentState State { get; set; }

        public static InternshipRegistration Create()
        {
            return new InternshipRegistration();
        }


        public (DocumentState State, IEnumerable<string>) ValidateStatus(Edition edition)
        {
            var validator = new Validator(edition);

            var result = validator.Validate(this);

            State = result.IsValid ? DocumentState.Submitted : DocumentState.Draft;

            return (State, result.Errors.Select(failure => failure.ToString()));
        }

        public class Validator : AbstractValidator<InternshipRegistration>
        {
            public Validator(Edition edition)
            {
                RuleFor(x => x.Company)
                    .SetValidator(new Company.Validator())
                    .NotNull();
                RuleFor(x => x.BranchAddress)
                    .SetValidator(new BranchOffice.Validator())
                    .NotNull();
                RuleFor(x => x.Mentor)
                    .SetValidator(new Mentor.Validate())
                    .NotNull();
                RuleFor(x => x.Subjects)
                    .NotEmpty()
                    .Must(s => edition.AreSubjectsAvailable(s.Select(su => su.InternshipSubjectId)))
                    .WithMessage("error.subjects.not_available");
                RuleFor(x => x.Type)
                    .NotNull()
                    .Must(edition.IsTypeAvailable)
                    .WithMessage("error.type.not_available");
                RuleFor(x => x.Start)
                    .GreaterThanOrEqualTo(edition.EditionStart)
                    .LessThan(x => x.End)
                    .NotEmpty()
                    .WithMessage("error.start_date.empty");
                RuleFor(x => x.End)
                    .LessThanOrEqualTo(edition.EditionFinish)
                    .GreaterThan(x => x.Start)
                    .NotEmpty()
                    .WithMessage("error.end_date.empty");
                RuleFor(x => x.DeclaredHours)
                    .NotEmpty()
                    .WithMessage("error.declared_hours.empty");
            }
        }
    }
}