Minecraft-Phantom-Panel/Server/Phantom.Server.Web/Pages/InstanceDetail.razor

@page "/instances/{InstanceGuid:guid}"
@attribute [Authorize(Permission.ViewInstancesPolicy)]
@inherits PhantomComponent
@using Phantom.Common.Data.Instance
@using Phantom.Common.Data.Replies
@using Phantom.Server.Services.Audit
@using Phantom.Server.Services.Instances
@implements IDisposable
@inject InstanceManager InstanceManager
@inject AuditLog AuditLog

@if (Instance == null) {
  <h1>Instance Not Found</h1>
  <p>Return to <a href="instances">all instances</a>.</p>
}
else {
  <h1>Instance: @Instance.Configuration.InstanceName</h1>
  <div class="d-flex flex-row align-items-center gap-2">
    <PermissionView Permission="Permission.ControlInstances">
      <button type="button" class="btn btn-success" @onclick="LaunchInstance" disabled="@(isLaunchingInstance || !Instance.Status.CanLaunch())">Launch</button>
      <button type="button" class="btn btn-danger" data-bs-toggle="modal" data-bs-target="#stop-instance" disabled="@(!Instance.Status.CanStop())">Stop...</button>
      <span><!-- extra spacing --></span>
    </PermissionView>
    <InstanceStatusText Status="Instance.Status" />
    <PermissionView Permission="Permission.CreateInstances">
      <a href="instances/@InstanceGuid/edit" class="btn btn-warning ms-auto">Edit Configuration</a>
    </PermissionView>
  </div>
  @if (lastError != null) {
    <p class="text-danger mt-2">@lastError</p>
  }

  <PermissionView Permission="Permission.ViewInstanceLogs">
    <InstanceLog InstanceGuid="InstanceGuid" />
  </PermissionView>

  <PermissionView Permission="Permission.ControlInstances">
    <div class="mb-3">
      <InstanceCommandInput InstanceGuid="InstanceGuid" Disabled="@(!Instance.Status.CanSendCommand())" />
    </div>

    <InstanceStopDialog InstanceGuid="InstanceGuid" ModalId="stop-instance" Disabled="@(!Instance.Status.CanStop())" />
  </PermissionView>
}

@code {

  [Parameter]
  public Guid InstanceGuid { get; set; }

  private string? lastError = null;
  private bool isLaunchingInstance = false;

  private Instance? Instance { get; set; }

  protected override void OnInitialized() {
    InstanceManager.InstancesChanged.Subscribe(this, instances => {
      var newInstance = instances.TryGetValue(InstanceGuid, out var instance) ? instance : null;
      if (newInstance != Instance) {
        Instance = newInstance;
        InvokeAsync(StateHasChanged);
      }
    });
  }

  private async Task LaunchInstance() {
    isLaunchingInstance = true;
    lastError = null;

    try {
      if (!await CheckPermission(Permission.ControlInstances)) {
        lastError = "You do not have permission to launch instances.";
        return;
      }

      var result = await InstanceManager.LaunchInstance(InstanceGuid);
      if (result.Is(LaunchInstanceResult.LaunchInitiated)) {
        await AuditLog.AddInstanceLaunchedEvent(InstanceGuid);
      }
      else {
        lastError = result.ToSentence(LaunchInstanceResultExtensions.ToSentence);
      }
    } finally {
      isLaunchingInstance = false;
    }
  }

  public void Dispose() {
    InstanceManager.InstancesChanged.Unsubscribe(this);
  }

}