bulletboards/ImageBoardServerApp/Pages/Accounts/UserPage.razor

@page "/sys/you"
@using ImageBoardServerApp.Auth
@using ImageBoardServerApp.Data.Repository
@using ImageBoardServerApp.Util
@inject AuthenticationStateProvider authStateProvider 
@inject NavigationManager navManager

<PageTitle>YOU - Bulletboards</PageTitle>

<AuthorizeView>
    <Authorized>
        <h3>YOUR ACCOUNT</h3>
        <br/>
        <span>Email: @userid</span>
        <br/>
        @if (isMailConfirmedMsg != null)
        {
            <span>@isMailConfirmedMsg</span>
            <br/>
        }
        <form>
            <RadzenFormField Text="Enter new email address" Variant="Variant.Outlined">
                <RadzenTextBox @bind-Value="@newMail"/>
            </RadzenFormField>
            <br/>
            <br/>
            <RadzenButton Click=@changeEmail Text="Set Email" ButtonStyle="ButtonStyle.Secondary"/>
            <br/>
        </form>
        @if (msg != null)
        {
            <div>
                <span class="msg">@msg</span>
            </div>
        }
        <br/>
        <br/>
        <br/>
        <a href="/sys/resetpw">[Click here to change your password]</a>
        <br/>
        <br/>
        <a href="/sys/logout">[Logout]</a>
    </Authorized>
    <NotAuthorized>
        <span>You are not logged in.</span>
        <a class="navbar-brand" href="/sys/login">Please login first.</a>
    </NotAuthorized>
</AuthorizeView>

@code {

    private string userid { get; set; } = "";
    private string newMail { get; set; }
    private string msg { get; set; } = "";

    private string isMailConfirmedMsg { get; set; } = "";

    protected override async Task OnInitializedAsync()
    {
        var cauthStateProvder = (CustomAuthenticationStateProvider)authStateProvider;
        var user = await cauthStateProvder.GetAuthenticationStateAsync();
        if (user.User.Identity.IsAuthenticated)
        {
            userid = user.User.Identity.Name;
        }
        UserData foundusr = await UsersRepository.getUserByEmailRawAsync(user.User.Identity.Name);
        if (foundusr != null)
            isMailConfirmedMsg = foundusr.ConfirmedEmail ? "Email is confirmed" : "Email is NOT confirmed";
    }

    private async Task changeEmail()
    {
        msg = "Checking...";
        var cauthStateProvder = (CustomAuthenticationStateProvider)authStateProvider;
        var user = await cauthStateProvder.GetAuthenticationStateAsync();
        var usr = user.User;
        UserData foundusr = await UsersRepository.getUserByEmailRawAsync(usr.Identity.Name);
        if (foundusr == null)
        {
            msg = "Could not find user.";
            return;
        }

        if (newMail == null || newMail == "" || !newMail.Contains("@") || !newMail.Contains("."))
        {
            msg = "The new email is not valid.";
            return;
        }
        UserData u2 = await UsersRepository.getUserByEmailRawAsync(newMail);
        if (u2 != null)
        {
            msg = "This email is already in use.";
            return;
        }

        msg = "Generating...";
        var hash = TheManager.getmd5Hash();

        foundusr.Email = newMail;
        foundusr.ConfirmEmailToken = hash;
        foundusr.lastActionTimeStamp = DateTimeOffset.Now.ToUnixTimeMilliseconds();
        foundusr.ConfirmedEmail = false;
        await UsersRepository.updateUserAsync(foundusr);

        Postman.sendMail(newMail,
            "Confirm email",
            "Confirm you email:\n" +
            $"https://bulletboards.xyz/sys/click/confirmmail/{foundusr.UserID}/{foundusr.Email}/{newMail}/{hash}");

        var customAuthStateProvider = (CustomAuthenticationStateProvider)authStateProvider;
        await customAuthStateProvider.UpdateAuthenticationStateAsync(foundusr);
        navManager.NavigateTo("/sys/you", true, true);
    }

}