Issue 4127 - [emscripten] Convert subscription classes to C++ - Part 2

compiled/subscription/UserDefinedSubscription.cpp

Index: compiled/subscription/UserDefinedSubscription.cpp
===================================================================
--- a/compiled/subscription/UserDefinedSubscription.cpp
+++ b/compiled/subscription/UserDefinedSubscription.cpp
@@ -65,16 +65,33 @@ void UserDefinedSubscription::MakeDefaul
   if (filter->mType >= Filter::Type::VALUE_COUNT)
   {
     assert(false, "Filter type exceeds valid range");
     abort();
   }
   mDefaults |= filterTypeToCategory[filter->mType];
 }
 
+void UserDefinedSubscription::InsertFilterAt(Filter* filter, unsigned pos)
+{
+  if (pos >= mFilters.size())
+    mFilters.emplace_back(filter);
+  else
+    mFilters.emplace(mFilters.begin() + pos, filter);
+}
+
+bool UserDefinedSubscription::RemoveFilterAt(unsigned pos)
+{
+  if (pos >= mFilters.size())
+    return false;
+
+  mFilters.erase(mFilters.begin() + pos);
+  return true;
+}
+
 OwnedString UserDefinedSubscription::Serialize() const
 {
   OwnedString result(Subscription::Serialize());
   if (mDefaults)
   {
     result.append(u"defaults="_str);
     if (mDefaults & FilterCategory::BLOCKING)
       result.append(u" blocking"_str);