private EventsCollector InitializeEvents()
{
_cancellation.ThrowIfCancellationRequested();
var methods = GetAllGraphMethodsFromBaseToDerived();
var eventsCollector = new EventsCollector(this, _pxContext);
int declarationOrder = 0;
foreach (IMethodSymbol method in methods)
{
_cancellation.ThrowIfCancellationRequested();
var(eventType, eventSignatureType) = method.GetEventHandlerInfo(_pxContext);
if (eventSignatureType == EventHandlerSignatureType.None || eventType == EventType.None)
{
continue;
}
GraphEventCategory eventCategory = GetEventCategoryByEventType(eventType);
if (!IsValidGraphEvent(method, eventSignatureType, eventCategory))
{
continue;
}
if (eventCategory == GraphEventCategory.Row)
{
eventsCollector.AddEvent(eventSignatureType, eventType, method, declarationOrder, _cancellation);
}
else if (eventCategory == GraphEventCategory.Field)
{
eventsCollector.AddFieldEvent(eventSignatureType, eventType, method, declarationOrder, _cancellation);
}
declarationOrder++;
}
return(eventsCollector);
}
/// <summary>
/// <see cref="CodeResolvingUtils.GetEventHandlerInfo"/> helper allows not only graph events but also helper methods with appropriate signature.
/// However, for graph events semantic model we are interested only in graph events, so we need to rule out helper methods by checking their signature.
/// </summary>
/// <param name="eventCandidate">The event candidate.</param>
/// <param name="signatureType">Type of the signature.</param>
/// <param name="eventCategory">Category the event belongs to.</param>
/// <returns/>
private bool IsValidGraphEvent(IMethodSymbol eventCandidate, EventHandlerSignatureType signatureType, GraphEventCategory eventCategory)
{
if (eventCandidate.IsStatic || eventCandidate.Parameters.Length > 2 || eventCategory == GraphEventCategory.None)
{
return(false);
}
else if (signatureType != EventHandlerSignatureType.Default)
{
return(true);
}
const char underscore = '_';
if (eventCandidate.Name[0] == underscore || eventCandidate.Name[eventCandidate.Name.Length - 1] == underscore)
{
return(false);
}
int underscoresCount = eventCandidate.Name.Count(c => c == underscore);
switch (eventCategory)
{
case GraphEventCategory.Row:
return(underscoresCount == 1);
case GraphEventCategory.Field:
return(underscoresCount == 2);
default:
return(false);
}
}
