Aaru.Server/Aaru.Server.New/Components/Account/Pages/RegisterConfirmation.razor

@page "/Account/RegisterConfirmation"
@using System.Text
@using Microsoft.AspNetCore.Identity
@using Microsoft.AspNetCore.WebUtilities

@inject UserManager<IdentityUser>  UserManager
@inject IEmailSender<IdentityUser> EmailSender
@inject NavigationManager          NavigationManager
@inject IdentityRedirectManager    RedirectManager

<PageTitle>Register confirmation</PageTitle>

<h1>Register confirmation</h1>

<StatusMessage Message="@statusMessage"/>

@if(emailConfirmationLink is not null)
{
    <p>
        This app does not currently have a real email sender registered, see <a href="https://aka.ms/aspaccountconf">these docs</a> for how to configure a real email sender.
        Normally this would be emailed: <a href="@emailConfirmationLink">Click here to confirm your account</a>
    </p>
}
else
{
    <p>Please check your email to confirm your account.</p>
}

@code {
    private string? emailConfirmationLink;
    private string? statusMessage;

    [CascadingParameter]
    private HttpContext HttpContext { get; set; } = default!;

    [SupplyParameterFromQuery]
    private string? Email { get; set; }

    [SupplyParameterFromQuery]
    private string? ReturnUrl { get; set; }

    protected override async Task OnInitializedAsync()
    {
        if(Email is null)
        {
            RedirectManager.RedirectTo("");
        }

        IdentityUser? user = await UserManager.FindByEmailAsync(Email);

        if(user is null)
        {
            HttpContext.Response.StatusCode = StatusCodes.Status404NotFound;
            statusMessage                   = "Error finding user for unspecified email";
        }
        else if(EmailSender is IdentityNoOpEmailSender)
        {
            // Once you add a real email sender, you should remove this code that lets you confirm the account
            string userId = await UserManager.GetUserIdAsync(user);
            string code   = await UserManager.GenerateEmailConfirmationTokenAsync(user);
            code = WebEncoders.Base64UrlEncode(Encoding.UTF8.GetBytes(code));

            emailConfirmationLink = NavigationManager.GetUriWithQueryParameters(NavigationManager.ToAbsoluteUri("Account/ConfirmEmail").AbsoluteUri,
                                                                                new Dictionary<string, object?>
                                                                                {
                                                                                    ["userId"]    = userId,
                                                                                    ["code"]      = code,
                                                                                    ["returnUrl"] = ReturnUrl
                                                                                });
        }
    }

}