using System;
using Example.App.Models;
namespace Example.App.Services
{
/// <summary>
/// Implementation of greeting service
/// </summary>
public class GreetingService : IGreetingService
{
private readonly string _defaultGreeting = "Hello";
public GreetingService()
{
}
public GreetingService(string defaultGreeting)
{
_defaultGreeting = defaultGreeting;
}
public string Greet(User user)
{
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
return FormatGreeting(user);
}
private string FormatGreeting(User user)
{
string rolePrefix = GetRolePrefix(user.Role);
return $"{_defaultGreeting}, {rolePrefix}{user.Name}!";
}
private string GetRolePrefix(Role role)
{
return role switch
{
Role.Admin => "Administrator ",
Role.SuperAdmin => "Super Admin ",
Role.User => "",
Role.Guest => "Guest ",
_ => ""
};
}
}
}
