LANCommander/LANCommander.Launcher/UI/Authenticate/Components/ServerSelector.razor

@using LANCommander.Launcher.Models
@using LANCommander.SDK.Models
@using ListItem = AntDesign.ListItem
@inject NavigationManager NavigationManager
@inject SDK.Client Client
@inject AuthenticationService AuthenticationService

<PageHeader>
    <TitleTemplate>
        Connect
    </TitleTemplate>
</PageHeader>

<Form Model="Model" OnFinish="() => SelectServer(ServerAddress)">
    <FormItem>
        <Flex Gap="FlexGap.Small">
            <Input @bind-Value="ServerAddress" Placeholder="Server Address" AutoFocus Disabled="Connecting" />
            <Button Type="ButtonType.Primary" HtmlType="submit" Disabled="Connecting" Loading="Connecting">Connect</Button>
        </Flex>
    </FormItem>
</Form>

<Divider Text="Discovered" Orientation="DividerOrientation.Center" />

<AntList DataSource="DiscoveredServers">
    <ChildContent>
        <ListItem OnClick="() => SelectServer(context.Address.ToString())">
            <ListItemMeta Title="@context.Name" Description="@context.Address.ToString()"/>
        </ListItem>
    </ChildContent>

    <LoadMore>
        <Flex Justify="FlexJustify.Center" Class="load-more">
            @if (BeaconActive)
            {
                <Button Type="ButtonType.Primary" Loading="true" Disabled>Scanning</Button>
            }
            else
            {
                <Button Type="ButtonType.Primary" OnClick="() => ActivateBeacon()">Rescan</Button>
            }
        </Flex>
    </LoadMore>
</AntList>

@code {
    [Parameter] public EventCallback<string> OnSelected { get; set; }
    [Parameter] public bool Connecting { get; set; } = false;
    
    bool BeaconActive = false;
    bool OfflineModeAvailable = false;

    string ServerAddress = String.Empty;
    
    AuthRequest Model = new();
    List<DiscoveredServer> DiscoveredServers = new();
    Models.Settings Settings = SettingService.GetSettings();

    protected override async Task OnInitializedAsync()
    {
        OfflineModeAvailable = await AuthenticationService.OfflineModeAvailableAsync();
        
        Client.Beacon.OnBeaconResponse += OnBeaconResponse;
        
        ActivateBeacon();
    }

    private void OnBeaconResponse(object sender, BeaconResponseArgs e)
    {
        var discoveredServer = new DiscoveredServer(e.Message, e.EndPoint);
        
        if (DiscoveredServers.All(s => s.Address != discoveredServer.Address))
            DiscoveredServers.Add(discoveredServer);
    }

    async Task SelectServer(string serverAddress)
    {
        await Client.Beacon.StopProbeAsync();

        BeaconActive = false;

        if (OnSelected.HasDelegate)
            await OnSelected.InvokeAsync(serverAddress);
    }
    
    async Task ActivateBeacon()
    {
        BeaconActive = true;

        await Client.Beacon.StartProbeAsync();

        await Task.Delay(10000);

        await Client.Beacon.StopProbeAsync();
        
        BeaconActive = false;

        await InvokeAsync(StateHasChanged);
    }
}