LANCommander/LANCommander.Server/UI/Pages/Profile/ChangePassword.razor

@page "/Profile/ChangePassword"
@using Microsoft.AspNetCore.Components.Authorization;
@inject UserService UserService
@inject IMessageService MessageService
@inject AuthenticationStateProvider AuthenticationStateProvider
@inject ILogger<ChangePassword> Logger
@attribute [Authorize]

<PageHeader Title="Change Password" />

<div style="padding: 0 24px;">
    <Form Model="Model" Layout="FormLayout.Vertical">
        @if (!String.IsNullOrWhiteSpace(User.PasswordHash))
        {
            <FormItem Label="Current Password">
                <InputPassword @bind-Value="context.CurrentPassword"/>
            </FormItem>            
        }
        
        <FormItem Label="New Password">
            <InputPassword @bind-Value="context.NewPassword"/>
        </FormItem>

        <FormItem Label="Confirm Password">
            <InputPassword @bind-Value="context.NewPasswordConfirm"/>
        </FormItem>

        <FormItem>
            <Button OnClick="Change" Type="@ButtonType.Primary">Change</Button>
        </FormItem>
    </Form>
</div>

@code {
    User User = new User();
    ChangePasswordModel Model = new ChangePasswordModel();

    protected override async Task OnInitializedAsync()
    {
        var authState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
        
        if (authState.User.Identity.IsAuthenticated)
            User = await UserService.GetAsync(authState.User.Identity.Name);
    }

    async void Change()
    {
        try
        {
            if (!String.IsNullOrWhiteSpace(User.PasswordHash) && !(await UserService.CheckPassword(User.UserName, Model.CurrentPassword)))
            {
                MessageService.Error("Incorrect password!");
                return;
            }
            
            if (Model.NewPassword == Model.NewPasswordConfirm)
            {
                var result = await UserService.ChangePassword(User.UserName, Model.CurrentPassword, Model.NewPassword);

                if (result.Succeeded)
                    MessageService.Success("Password changed!");
            }
            else
                MessageService.Error("Passwords don't match!");
        }
        catch (Exception ex)
        {
            await MessageService.ErrorAsync("Password could not be changed!");
            Logger.LogError(ex, "Password could not be changed!");
        }
    }

    public class ChangePasswordModel
    {
        public string CurrentPassword { get; set; }
        public string NewPassword { get; set; }
        public string NewPasswordConfirm { get; set; }
    }
}