fix(skyrim-platform): fix crash related to bad event names (#1710)

docs/release/dev/sp-fix-event-crash.md

@@ -0,0 +1 @@
+Fixed crash during hot-reload after an attempt to register a non-existent event listener.

skyrim-platform/src/platform_se/skyrim_platform/EventManager.cpp

@@ -152,3 +152,37 @@ void EventManager::Unsubscribe(uintptr_t uid,
     }
   }
 }
+
+void EventManager::ClearCallbacks()
+{
+  for (const auto& event : events) {
+    if (event.second) {
+      event.second->callbacks.clear();
+    }
+  }
+
+  auto handler = EventHandler::GetSingleton();
+  handler->DeactivateAllSinks();
+}
+
+CallbackObjMap* EventManager::GetCallbackObjMap(const char* eventName)
+{
+  auto event = events[eventName];
+
+  if (!event) {
+    return nullptr;
+  }
+
+  return &event->callbacks;
+}
+
+void EventManager::EmplaceEvent(const std::string_view& name,
+                                EventState* state)
+{
+  events.emplace(name, state);
+}
+
+EventMap* EventManager::GetEventMap()
+{
+  return &events;
+}

skyrim-platform/src/platform_se/skyrim_platform/EventManager.h

@@ -80,34 +80,14 @@ class EventManager
 
   void Unsubscribe(uintptr_t uid, const std::string_view& eventName);
 
-  void ClearCallbacks()
-  {
-    for (const auto& event : events) {
-      event.second->callbacks.clear();
-    }
-
-    auto handler = EventHandler::GetSingleton();
-    handler->DeactivateAllSinks();
-  }
-
-  CallbackObjMap* GetCallbackObjMap(const char* eventName)
-  {
-    auto event = events[eventName];
+  void ClearCallbacks();
 
-    if (!event) {
-      return nullptr;
-    }
-
-    return &event->callbacks;
-  }
+  CallbackObjMap* GetCallbackObjMap(const char* eventName);
 
   void EmplaceEvent(const std::string_view& name,
-                    EventState* state = new EventState(nullptr))
-  {
-    events.emplace(name, state);
-  }
+                    EventState* state = new EventState(nullptr));
 
-  EventMap* GetEventMap() { return &events; }
+  EventMap* GetEventMap();
 
 private:
   // last i checked we had ~97 events