Resolve the currently loaded content context

[InitializableModule]
[ModuleDependency(typeof(EPiServer.Web.InitializationModule))]
public class CustomModule : IInitializableModule
{
    private IContentEvents _contentEvents;
    private CurrentContentContext _currentContentContext;

    // Called during application initialization
    public void Initialize(InitializationEngine context)
    {
        _contentEvents = context.Services.GetRequiredService<IContentEvents>();
        _currentContentContext = context.Services.GetRequiredService<CurrentContentContext>();

        // Subscribe to content creation events
        _contentEvents.CreatedContent += CreatedContent;
        _contentEvents.CreatingContent += CreatingContent;
    }

    // Triggered before content is created
    private void CreatingContent(object sender, ContentEventArgs e)
    {
        // Gets the content the editor is currently viewing when the create action is initiated
        var currentContentLink = _currentContentContext.ContentLink;

        // ContentLink is not yet assigned at this stage
        var newlyCreatedContentLink = e.ContentLink; // null
    }

    // Triggered after content has been created
    private void CreatedContent(object sender, ContentEventArgs e)
    {
        // ContentLink is now assigned to the newly created content
        var newlyCreatedContentLink = e.ContentLink;

        // Still possible to access the original content context (where the action was initiated)
        var currentContentLink = _currentContentContext.ContentLink;
    }

    // Called during application shutdown
    public void Uninitialize(InitializationEngine context)
    {
        // Unsubscribe from events to prevent memory leaks
        _contentEvents.CreatedContent -= CreatedContent;
        _contentEvents.CreatingContent -= CreatingContent;
    }
}

public class OfferPage : PageData
{
    [EditorDescriptor(EditorDescriptorType = typeof(CollectionEditorDescriptor<OfferDetailsItem>))]
    public virtual IList<OfferDetailsItem> OfferDetailsItems { get; set; }
}

public class OfferDetailsItem
{
    [Display(Order = 1)]
    [UIHint("test")]
    public virtual string Label { get; set; }
}

[PropertyDefinitionTypePlugIn]
public class OfferDetailsItemPropertyList : PropertyList<OfferDetailsItem>
{ }

[EditorDescriptorRegistration(TargetType = typeof(string), UIHint = "test")]
public class CustomXhtmlDescriptor(CurrentContentContext currentContentContext) : StringEditorDescriptor
{
    public override void ModifyMetadata(ExtendedMetadata metadata, IEnumerable<Attribute> attributes)
    {
        base.ModifyMetadata(metadata, attributes);

        var ownerContent = metadata.FindOwnerContent(); // --> will return null because the object we annotate is not ContentData but simple POCO
        var currentContent = currentContentContext.ContentLink; // --> will return correct page id
    }
}