shoc-backend/SeaHaven.Services/DTOs/ContactDTOs.cs

namespace SeaHaven.Services.DTOs
{
    public class ContactDTO
    {
        public int Id { get; set; }
        public string? FirstName { get; set; }
        public string? LastName { get; set; }
        public string? Email { get; set; }
        public string? Phone { get; set; }
        public string? Mobile { get; set; }
        public string? Title { get; set; }
        public string? Type { get; set; }
        public int? AccountId { get; set; }
        public string? AccountName { get; set; }
        public DateTime? CreatedDate { get; set; }
        public string? CreatedBy { get; set; }
        public DateTime? ModifiedDate { get; set; }
        public string? ModifiedBy { get; set; }
    }

    public class CreateContactDTO
    {
        public required string FirstName { get; set; }
        public required string LastName { get; set; }
        public required string Email { get; set; }
        public string? Phone { get; set; }
        public string? Mobile { get; set; }
        public string? Title { get; set; }
        public string? Type { get; set; }
        public int? AccountId { get; set; }
    }

    public class UpdateContactDTO
    {
        public string? FirstName { get; set; }
        public string? LastName { get; set; }
        public string? Email { get; set; }
        public string? Phone { get; set; }
        public string? Mobile { get; set; }
        public string? Title { get; set; }
        public string? Type { get; set; }
        public int? AccountId { get; set; }
    }

    public class PagedResult<T>
    {
        public IEnumerable<T> Items { get; set; } = new List<T>();
        public int TotalCount { get; set; }
        public int Page { get; set; }
        public int PageSize { get; set; }

        /// <summary>
        /// Page numbering base for <see cref="HasPrevious"/> / <see cref="HasNext"/>.
        /// Default <c>1</c> (classic APIs). Work-order advanced search sets <c>0</c>.
        /// </summary>
        public int PageBase { get; set; } = 1;

        public int TotalPages => PageSize <= 0 ? 0 : (int)Math.Ceiling(TotalCount / (double)PageSize);

        public bool HasPrevious => PageBase <= 0 ? Page > 0 : Page > 1;

        public bool HasNext => PageBase <= 0 ? Page + 1 < TotalPages : Page < TotalPages;
    }
}