using System;
using System.Threading.Tasks;

namespace ContactsApp
{
    public interface IContactRepository
    {
        public void AddContact(Contact contact);
        public void UpdateContact(Guid id, Contact contact);
        public void DeleteContact(Guid id);
        public Contact GetContactById(Guid id);
        public IEnumerable<Contact> GetAll();
        public void LoadJSON(string file);
        public string SaveJSON();
    }
}