--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Agendas/trunk/src/Agendas.Web/Models/AccountModels.cs	Sun Mar 13 18:51:06 2011 -0300
@@ -0,0 +1,250 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+using System.Globalization;
+using System.Linq;
+using System.Web;
+using System.Web.Mvc;
+using System.Web.Security;
+
+namespace Agendas.Web.Models
+{
+
+    #region Models
+
+    public class ChangePasswordModel
+    {
+        [Required]
+        [DataType(DataType.Password)]
+        [Display(Name = "Current password")]
+        public string OldPassword { get; set; }
+
+        [Required]
+        [ValidatePasswordLength]
+        [DataType(DataType.Password)]
+        [Display(Name = "New password")]
+        public string NewPassword { get; set; }
+
+        [DataType(DataType.Password)]
+        [Display(Name = "Confirm new password")]
+        [Compare("NewPassword", ErrorMessage = "The new password and confirmation password do not match.")]
+        public string ConfirmPassword { get; set; }
+    }
+
+    public class LogOnModel
+    {
+        [Required]
+        [Display(Name = "User name")]
+        public string UserName { get; set; }
+
+        [Required]
+        [DataType(DataType.Password)]
+        [Display(Name = "Password")]
+        public string Password { get; set; }
+
+        [Display(Name = "Remember me?")]
+        public bool RememberMe { get; set; }
+    }
+
+
+    public class RegisterModel
+    {
+        [Required]
+        [Display(Name = "User name")]
+        public string UserName { get; set; }
+
+        [Required]
+        [DataType(DataType.EmailAddress)]
+        [Display(Name = "Email address")]
+        public string Email { get; set; }
+
+        [Required]
+        [ValidatePasswordLength]
+        [DataType(DataType.Password)]
+        [Display(Name = "Password")]
+        public string Password { get; set; }
+
+        [DataType(DataType.Password)]
+        [Display(Name = "Confirm password")]
+        [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
+        public string ConfirmPassword { get; set; }
+    }
+    #endregion
+
+    #region Services
+    // The FormsAuthentication type is sealed and contains static members, so it is difficult to
+    // unit test code that calls its members. The interface and helper class below demonstrate
+    // how to create an abstract wrapper around such a type in order to make the AccountController
+    // code unit testable.
+
+    public interface IMembershipService
+    {
+        int MinPasswordLength { get; }
+
+        bool ValidateUser(string userName, string password);
+        MembershipCreateStatus CreateUser(string userName, string password, string email);
+        bool ChangePassword(string userName, string oldPassword, string newPassword);
+    }
+
+    public class AccountMembershipService : IMembershipService
+    {
+        private readonly MembershipProvider _provider;
+
+        public AccountMembershipService()
+            : this(null)
+        {
+        }
+
+        public AccountMembershipService(MembershipProvider provider)
+        {
+            _provider = provider ?? Membership.Provider;
+        }
+
+        public int MinPasswordLength
+        {
+            get
+            {
+                return _provider.MinRequiredPasswordLength;
+            }
+        }
+
+        public bool ValidateUser(string userName, string password)
+        {
+            if (String.IsNullOrEmpty(userName)) throw new ArgumentException("Value cannot be null or empty.", "userName");
+            if (String.IsNullOrEmpty(password)) throw new ArgumentException("Value cannot be null or empty.", "password");
+
+            return _provider.ValidateUser(userName, password);
+        }
+
+        public MembershipCreateStatus CreateUser(string userName, string password, string email)
+        {
+            if (String.IsNullOrEmpty(userName)) throw new ArgumentException("Value cannot be null or empty.", "userName");
+            if (String.IsNullOrEmpty(password)) throw new ArgumentException("Value cannot be null or empty.", "password");
+            if (String.IsNullOrEmpty(email)) throw new ArgumentException("Value cannot be null or empty.", "email");
+
+            MembershipCreateStatus status;
+            _provider.CreateUser(userName, password, email, null, null, true, null, out status);
+            return status;
+        }
+
+        public bool ChangePassword(string userName, string oldPassword, string newPassword)
+        {
+            if (String.IsNullOrEmpty(userName)) throw new ArgumentException("Value cannot be null or empty.", "userName");
+            if (String.IsNullOrEmpty(oldPassword)) throw new ArgumentException("Value cannot be null or empty.", "oldPassword");
+            if (String.IsNullOrEmpty(newPassword)) throw new ArgumentException("Value cannot be null or empty.", "newPassword");
+
+            // The underlying ChangePassword() will throw an exception rather
+            // than return false in certain failure scenarios.
+            try
+            {
+                MembershipUser currentUser = _provider.GetUser(userName, true /* userIsOnline */);
+                return currentUser.ChangePassword(oldPassword, newPassword);
+            }
+            catch (ArgumentException)
+            {
+                return false;
+            }
+            catch (MembershipPasswordException)
+            {
+                return false;
+            }
+        }
+    }
+
+    public interface IFormsAuthenticationService
+    {
+        void SignIn(string userName, bool createPersistentCookie);
+        void SignOut();
+    }
+
+    public class FormsAuthenticationService : IFormsAuthenticationService
+    {
+        public void SignIn(string userName, bool createPersistentCookie)
+        {
+            if (String.IsNullOrEmpty(userName)) throw new ArgumentException("Value cannot be null or empty.", "userName");
+
+            FormsAuthentication.SetAuthCookie(userName, createPersistentCookie);
+        }
+
+        public void SignOut()
+        {
+            FormsAuthentication.SignOut();
+        }
+    }
+    #endregion
+
+    #region Validation
+    public static class AccountValidation
+    {
+        public static string ErrorCodeToString(MembershipCreateStatus createStatus)
+        {
+            // See http://go.microsoft.com/fwlink/?LinkID=177550 for
+            // a full list of status codes.
+            switch (createStatus)
+            {
+                case MembershipCreateStatus.DuplicateUserName:
+                    return "Username already exists. Please enter a different user name.";
+
+                case MembershipCreateStatus.DuplicateEmail:
+                    return "A username for that e-mail address already exists. Please enter a different e-mail address.";
+
+                case MembershipCreateStatus.InvalidPassword:
+                    return "The password provided is invalid. Please enter a valid password value.";
+
+                case MembershipCreateStatus.InvalidEmail:
+                    return "The e-mail address provided is invalid. Please check the value and try again.";
+
+                case MembershipCreateStatus.InvalidAnswer:
+                    return "The password retrieval answer provided is invalid. Please check the value and try again.";
+
+                case MembershipCreateStatus.InvalidQuestion:
+                    return "The password retrieval question provided is invalid. Please check the value and try again.";
+
+                case MembershipCreateStatus.InvalidUserName:
+                    return "The user name provided is invalid. Please check the value and try again.";
+
+                case MembershipCreateStatus.ProviderError:
+                    return "The authentication provider returned an error. Please verify your entry and try again. If the problem persists, please contact your system administrator.";
+
+                case MembershipCreateStatus.UserRejected:
+                    return "The user creation request has been canceled. Please verify your entry and try again. If the problem persists, please contact your system administrator.";
+
+                default:
+                    return "An unknown error occurred. Please verify your entry and try again. If the problem persists, please contact your system administrator.";
+            }
+        }
+    }
+
+    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
+    public sealed class ValidatePasswordLengthAttribute : ValidationAttribute, IClientValidatable
+    {
+        private const string _defaultErrorMessage = "'{0}' must be at least {1} characters long.";
+        private readonly int _minCharacters = Membership.Provider.MinRequiredPasswordLength;
+
+        public ValidatePasswordLengthAttribute()
+            : base(_defaultErrorMessage)
+        {
+        }
+
+        public override string FormatErrorMessage(string name)
+        {
+            return String.Format(CultureInfo.CurrentCulture, ErrorMessageString,
+                name, _minCharacters);
+        }
+
+        public override bool IsValid(object value)
+        {
+            string valueAsString = value as string;
+            return (valueAsString != null && valueAsString.Length >= _minCharacters);
+        }
+
+        public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
+        {
+            return new[]{
+                new ModelClientValidationStringLengthRule(FormatErrorMessage(metadata.GetDisplayName()), _minCharacters, int.MaxValue)
+            };
+        }
+    }
+    #endregion
+}