/// <summary>
/// Publish model prepared event
/// </summary>
/// <param name="model">Model</param>
/// <returns>A task that represents the asynchronous operation</returns>
protected virtual async Task PublishModelPreparedEventAsync(object model)
{
//we publish the ModelPrepared event for all models as the BaseNopModel,
//so you need to implement IConsumer<ModelPrepared<BaseNopModel>> interface to handle this event
if (model is BaseNopModel nopModel)
{
await _eventPublisher.ModelPreparedAsync(nopModel);
}
//we publish the ModelPrepared event for collection as the IEnumerable<BaseNopModel>,
//so you need to implement IConsumer<ModelPrepared<IEnumerable<BaseNopModel>>> interface to handle this event
if (model is IEnumerable <BaseNopModel> nopModelCollection)
{
await _eventPublisher.ModelPreparedAsync(nopModelCollection);
}
}
/// <summary>
/// Called asynchronously before the action, after model binding is complete.
/// </summary>
/// <param name="context">A context for action filters</param>
/// <returns>A task that on completion indicates the necessary filter actions have been executed</returns>
private async Task PublishModelPreparedEventAsync(ActionExecutingContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (context.HttpContext.Request == null)
{
return;
}
//check whether this filter has been overridden for the Action
var actionFilter = context.ActionDescriptor.FilterDescriptors
.Where(filterDescriptor => filterDescriptor.Scope == FilterScope.Action)
.Select(filterDescriptor => filterDescriptor.Filter)
.OfType <PublishModelEventsAttribute>()
.FirstOrDefault();
//whether to ignore this filter
if (actionFilter?.IgnoreFilter ?? _ignoreFilter)
{
return;
}
//model prepared event
if (context.Controller is Controller controller)
{
if (controller.ViewData.Model is BaseNopModel model)
{
//we publish the ModelPrepared event for all models as the BaseNopModel,
//so you need to implement IConsumer<ModelPrepared<BaseNopModel>> interface to handle this event
await _eventPublisher.ModelPreparedAsync(model);
}
if (controller.ViewData.Model is IEnumerable <BaseNopModel> modelCollection)
{
//we publish the ModelPrepared event for collection as the IEnumerable<BaseNopModel>,
//so you need to implement IConsumer<ModelPrepared<IEnumerable<BaseNopModel>>> interface to handle this event
await _eventPublisher.ModelPreparedAsync(modelCollection);
}
}
}