Minecraft-Phantom-Panel/Web/Phantom.Web/Pages/Audit.razor

@page "/audit"
@attribute [Authorize(Permission.ViewAuditPolicy)]
@using System.Collections.Immutable
@using Phantom.Common.Data.Web.AuditLog
@using Phantom.Common.Data.Web.Users
@using Phantom.Web.Services.Users
@using Phantom.Web.Services.Instances
@inherits Phantom.Web.Components.PhantomComponent
@inject AuditLogManager AuditLogManager
@inject InstanceManager InstanceManager
@inject UserManager UserManager

<h1>Audit Log</h1>

<Table TItem="AuditLogItem" Items="logItems">
  <HeaderRow>
    <Column Class="text-end" MinWidth="200px">Time</Column>
    <Column>User</Column>
    <Column>Event Type</Column>
    <Column>Subject</Column>
    <Column Width="100%">Data</Column>
  </HeaderRow>
  <ItemRow Context="logItem">
    <Cell class="text-end">
      <TimeWithOffset Time="logItem.UtcTime.ToLocalTime()" />
    </Cell>
    <Cell>
      <p class="fw-semibold">@(logItem.UserName ?? "-")</p>
      <small class="font-monospace text-uppercase">@logItem.UserGuid.ToString()</small>
    </Cell>
    <Cell>
      <p>@logItem.EventType.ToNiceString()</p>
    </Cell>
    <Cell>
      <p class="fw-semibold">@(logItem.SubjectId is {} subjectId && GetSubjectName(logItem.SubjectType, subjectId) is {} subjectName ? subjectName : "-")</p>
      <small class="font-monospace text-uppercase">@(logItem.SubjectId ?? "-")</small>
    </Cell>
    <Cell>
      <code>@logItem.JsonData</code>
    </Cell>
  </ItemRow>
  <NoItemsRow>
    No audit log entries found.
  </NoItemsRow>
</Table>

@code {

  private CancellationTokenSource? initializationCancellationTokenSource;
  private ImmutableArray<AuditLogItem>? logItems;
  private ImmutableDictionary<Guid, string>? userNamesByGuid;
  private ImmutableDictionary<Guid, string> instanceNamesByGuid = ImmutableDictionary<Guid, string>.Empty;

  protected override async Task OnInitializedAsync() {
    initializationCancellationTokenSource = new CancellationTokenSource();
    var cancellationToken = initializationCancellationTokenSource.Token;

    try {
      logItems = await AuditLogManager.GetMostRecentItems(50, cancellationToken);
      userNamesByGuid = (await UserManager.GetAll(cancellationToken)).ToImmutableDictionary(static user => user.Guid, static user => user.Name);
      instanceNamesByGuid = InstanceManager.GetAll().Values.ToImmutableDictionary(static instance => instance.InstanceGuid, static instance => instance.Configuration.InstanceName);
    } finally {
      initializationCancellationTokenSource.Dispose();
    }
  }

  private string? GetSubjectName(AuditLogSubjectType type, string id) {
    return type switch {
      AuditLogSubjectType.Instance => instanceNamesByGuid.TryGetValue(Guid.Parse(id), out var name) ? name : null,
      AuditLogSubjectType.User     => userNamesByGuid != null && userNamesByGuid.TryGetValue(Guid.Parse(id), out var name) ? name : null,
      _                            => null
    };
  }

  protected override void OnDisposed() {
    try {
      initializationCancellationTokenSource?.Cancel();
    } catch (ObjectDisposedException) {}
  }

}