Added EntityWrapper::Valid and bool overload to be check if an entity is valid and still exists in the world more easily

include/Engine/Core/EntityWrapper.h

@@ -23,10 +23,12 @@ struct EntityWrapper
     static const EntityWrapper Invalid;
 
     bool HasComponent(const std::string& componentName);
+    bool Valid();
 
-    ComponentWrapper operator[](const std::string& componentName);
+    ComponentWrapper operator[](const char* componentName);
     bool operator==(const EntityWrapper& e);
-    explicit operator EntityID();
+    explicit operator EntityID() const;
+    operator bool();
 };
 
 #endif

src/Engine/Core/EntityWrapper.cpp

@@ -13,18 +13,41 @@ bool EntityWrapper::HasComponent(const std::string& componentName)
     return World->HasComponent(ID, componentName);
 }
 
-ComponentWrapper EntityWrapper::operator[](const std::string& componentName)
+bool EntityWrapper::Valid()
+{
+    if (this->World == nullptr) {
+        return false;
+    }
+
+    if (this->ID == EntityID_Invalid) {
+        return false;
+    }
+
+    if (!this->World->ValidEntity(this->ID)) {
+        this->ID = EntityID_Invalid;
+        return false;
+    }
+
+    return true;
+}
+
+ComponentWrapper EntityWrapper::operator[](const char* componentName)
 {
     if (World->HasComponent(ID, componentName)) {
         return World->GetComponent(ID, componentName);
     } else {
-        LOG_WARNING("EntityWrapper implicitly attached \"%s\" component to #%i as a result of a fetch request!", componentName.c_str(), ID);
+        LOG_WARNING("EntityWrapper implicitly attached \"%s\" component to #%i as a result of a fetch request!", componentName, ID);
         return World->AttachComponent(ID, componentName);
     }
 }
 
-EntityWrapper::operator EntityID()
+EntityWrapper::operator EntityID() const
 {
     return this->ID;
 }
 
+EntityWrapper::operator bool()
+{
+    return this->Valid();
+}
+