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using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using Microsoft.AspNetCore.Identity;
using System.Collections.Generic;
namespace Models.Classes
{
[Table("Users")]
public class User<T> : IdentityUser<int>
{
private string firstName;
private string lastName;
private string profilePicture;
[Required]
[Range(3, 50)]
[Display(Name = "Username")]
public override string UserName {
get => base.UserName;
set {
ValidateString("Username", 3, 50, value, true);
base.UserName = value;
}
}
[Required]
[Range(3, 30)]
public string FirstName {
get => this.firstName;
set {
ValidateString("FirstName", 3, 30, value, false);
this.firstName = value;
}
}
[Required]
[Range(3, 30)]
public string LastName {
get => this.lastName;
set {
ValidateString("LastName", 3, 30, value, false);
this.lastName = value;
}
}
public string ProfilePicture {
get => this.profilePicture;
set {
ValidateURL(value);
this.profilePicture = value;
}
}
public List<User<T>> Friends { get; set; }
/// <summary>
/// Throws an argument exception if the given value is not composed only of letters, and if specified, also of digits.
/// Does nothing otherwise.
/// </summary>
private static void ValidateString(string name, int minLength, int maxLength, string value, bool canBeDigit) {
if (value.Length < minLength || value.Length > maxLength)
throw new ArgumentException($"{name} length cannot be less than {minLength} and more than {maxLength}.");
foreach (char character in value) { // more efficient than Linq
if (!Char.IsLetter(character) || (canBeDigit && !Char.IsDigit(character)))
throw new ArgumentException($"{name} contains invalid characters.");
}
}
/// <summary>
/// Throws an exception if the absolute url isn't valid.
/// Does nothing otherwise.
/// </summary>
private static void ValidateURL(string urlValue) {
// Throws an error is URL is invalid
Uri validatedUri;
Uri.TryCreate(urlValue, UriKind.Absolute, out validatedUri);
}
}
}
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