feat: add "HandleEvent" function (#116)

* feat: add "HandleEvent" function

This function can be used to execute the registered events directly by specifying the deliveryID, the event name and the event itself.

Closes #115

* use the generated template instead

* remove extra line

Author: acouvreur

gen/template_webook_event.go

@@ -251,6 +251,11 @@ func (g *EventHandler) HandleEventRequest(req *http.Request) error {
 	deliveryID := github.DeliveryID(req)
 	eventName := github.WebHookType(req)
 
+	return g.HandleEvent(deliveryID, eventName, event)
+}
+
+// HandleEvent executes registered handlers.
+func (g *EventHandler) HandleEvent(deliveryID string, eventName string, event interface{}) error {
 	switch event := event.(type) {
 	{{ range $_, $webhook := .Webhooks }}
 	case *github.{{ $webhook.Event }}:

githubevents/events.go

@@ -296,6 +296,11 @@ func (g *EventHandler) HandleEventRequest(req *http.Request) error {
 	deliveryID := github.DeliveryID(req)
 	eventName := github.WebHookType(req)
 
+	return g.HandleEvent(deliveryID, eventName, event)
+}
+
+// HandleEvent executes registered handlers.
+func (g *EventHandler) HandleEvent(deliveryID string, eventName string, event interface{}) error {
 	switch event := event.(type) {
 
 	case *github.BranchProtectionRuleEvent: