Make JsEngine::Evaluate() return a wrapper for v8::Value to accessdifferent variable types easily

src/FilterEngine.cpp

 #include <algorithm>
 #include <cctype>
 #include <functional>
 
 #include <AdblockPlus.h>
 
 using namespace AdblockPlus;
 
 #if !FILTER_ENGINE_STUBS
 extern const char* jsSources[];
 #endif
 
 #if FILTER_ENGINE_STUBS
 JsObject::JsObject(FilterEngine& filterEngine)
     : filterEngine(filterEngine)
 {
 }
 #else
-JsObject::JsObject()
-{
+JsObject::JsObject(JsValuePtr value)
+    : JsValue(value->jsEngine, value->value)
+{
+  if (!IsObject())
+    throw std::runtime_error("JavaScript value is not an object");
 }
 #endif
 
 std::string JsObject::GetProperty(const std::string& name, const std::string& defaultValue) const
 {
 #if FILTER_ENGINE_STUBS
   std::map<std::string, std::string>::const_iterator it = stringProperties.find(name);
   if (it == stringProperties.end())
     return defaultValue;
   else
     return it->second;
-#endif
-}
-
-int JsObject::GetProperty(const std::string& name, int defaultValue) const
-{
-#if FILTER_ENGINE_STUBS
-  std::map<std::string, int>::const_iterator it = intProperties.find(name);
+#else
+  JsValuePtr value = JsValue::GetProperty(name);
+  if (value->IsString())
+    return value->AsString();
+  else
+    return defaultValue;
+#endif
+}
+
+int64_t JsObject::GetProperty(const std::string& name, int64_t defaultValue) const
+{
+#if FILTER_ENGINE_STUBS
+  std::map<std::string, int64_t>::const_iterator it = intProperties.find(name);
   if (it == intProperties.end())
     return defaultValue;
   else
     return it->second;
+#else
+  JsValuePtr value = JsValue::GetProperty(name);
+  if (value->IsNumber())
+    return value->AsInt();
+  else
+    return defaultValue;
 #endif
 }
 
 bool JsObject::GetProperty(const std::string& name, bool defaultValue) const
 {
 #if FILTER_ENGINE_STUBS
   std::map<std::string, bool>::const_iterator it = boolProperties.find(name);
   if (it == boolProperties.end())
     return defaultValue;
   else
     return it->second;
-#endif
-}
-
+#else
+  JsValuePtr value = JsValue::GetProperty(name);
+  if (value->IsBool())
+    return value->AsBool();
+  else
+    return defaultValue;
+#endif
+}
+
+#if FILTER_ENGINE_STUBS
 void JsObject::SetProperty(const std::string& name, const std::string& value)
 {
-#if FILTER_ENGINE_STUBS
   stringProperties[name] = value;
-#endif
-}
-
-void JsObject::SetProperty(const std::string& name, int value)
-{
-#if FILTER_ENGINE_STUBS
+}
+
+void JsObject::SetProperty(const std::string& name, int64_t value)
+{
   intProperties[name] = value;
-#endif
 }
 
 void JsObject::SetProperty(const std::string& name, bool value)
 {
-#if FILTER_ENGINE_STUBS
   boolProperties[name] = value;
-#endif
-}
+}
+#endif
 
 #if FILTER_ENGINE_STUBS
 Filter::Filter(FilterEngine& filterEngine, const std::string& text)
     : JsObject(filterEngine)
 {
   SetProperty("text", text);
+
+  Type type;
   if (text.find("!") == 0)
-    SetProperty("type", TYPE_COMMENT);
+    type = TYPE_COMMENT;
   else if (text.find("@@") == 0)
-    SetProperty("type", TYPE_EXCEPTION);
+    type = TYPE_EXCEPTION;
   else if (text.find("#@") != std::string::npos)
-    SetProperty("type", TYPE_ELEMHIDE_EXCEPTION);
+    type = TYPE_ELEMHIDE_EXCEPTION;
   else if (text.find("#") != std::string::npos)
-    SetProperty("type", TYPE_ELEMHIDE);
-  else
-    SetProperty("type", TYPE_BLOCKING);
-}
-#else
-Filter::Filter()
-{
-}
-#endif
-
-bool Filter::IsListed() const
+    type = TYPE_ELEMHIDE;
+  else
+    type = TYPE_BLOCKING;
+  SetProperty("type", type);
+}
+#else
+Filter::Filter(JsValuePtr value)
+    : JsObject(value)
+{
+  // Hack: set `type` property according to class name
+  std::string className = GetClassName();
+  Type type;
+  if (className == "BlockingFilter")
+    type = TYPE_BLOCKING;
+  else if (className == "WhitelistFilter")
+    type = TYPE_EXCEPTION;
+  else if (className == "ElemHideFilter")
+    type = TYPE_ELEMHIDE;
+  else if (className == "ElemHideException")
+    type = TYPE_ELEMHIDE_EXCEPTION;
+  else if (className == "CommentFilter")
+    type = TYPE_COMMENT;
+  else
+    type = TYPE_INVALID;
+  SetProperty("type", type);
+}
+#endif
+
+bool Filter::IsListed()
 {
 #if FILTER_ENGINE_STUBS
   for (std::vector<FilterPtr>::iterator it = filterEngine.listedFilters.begin();
        it != filterEngine.listedFilters.end(); ++it)
   {
     if (it->get() == this)
       return true;
   }
   return false;
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.isListedFilter");
+  JsValueList params;
+  params.push_back(shared_from_this());
+  return func->Call(params)->AsBool();
 #endif
 }
 
 void Filter::AddToList()
 {
 #if FILTER_ENGINE_STUBS
   if (!IsListed())
     filterEngine.listedFilters.push_back(shared_from_this());
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.addFilterToList");
+  JsValueList params;
+  params.push_back(shared_from_this());
+  func->Call(params);
 #endif
 }
 
 void Filter::RemoveFromList()
 {
+#if FILTER_ENGINE_STUBS
   for (std::vector<FilterPtr>::iterator it = filterEngine.listedFilters.begin();
        it != filterEngine.listedFilters.end();)
   {
     if (it->get() == this)
       it = filterEngine.listedFilters.erase(it);
     else
       it++;
   }
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.removeFilterFromList");
+  JsValueList params;
+  params.push_back(shared_from_this());
+  func->Call(params);
+#endif
+}
+
+bool Filter::operator==(const Filter& filter) const
+{
+  return GetProperty("text", "") == filter.GetProperty("text", "");
 }
 
 #if FILTER_ENGINE_STUBS
 Subscription::Subscription(FilterEngine& filterEngine, const std::string& url)
     : JsObject(filterEngine)
 {
   SetProperty("url", url);
 }
 #else
-Subscription::Subscription()
-{
-}
-#endif
-
-bool Subscription::IsListed() const
+Subscription::Subscription(JsValuePtr value)
+    : JsObject(value)
+{
+}
+#endif
+
+bool Subscription::IsListed()
 {
 #if FILTER_ENGINE_STUBS
   for (std::vector<SubscriptionPtr>::iterator it = filterEngine.listedSubscriptions.begin();
        it != filterEngine.listedSubscriptions.end(); ++it)
   {
     if (it->get() == this)
       return true;
   }
   return false;
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.isListedFilter");
+  JsValueList params;
+  params.push_back(shared_from_this());
+  return func->Call(params)->AsBool();
 #endif
 }
 
 void Subscription::AddToList()
 {
 #if FILTER_ENGINE_STUBS
   if (!IsListed())
     filterEngine.listedSubscriptions.push_back(shared_from_this());
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.addSubscriptionToList");
+  JsValueList params;
+  params.push_back(shared_from_this());
+  func->Call(params);
 #endif
 }
 
 void Subscription::RemoveFromList()
 {
+#if FILTER_ENGINE_STUBS
   for (std::vector<SubscriptionPtr>::iterator it = filterEngine.listedSubscriptions.begin();
        it != filterEngine.listedSubscriptions.end();)
   {
     if (it->get() == this)
       it = filterEngine.listedSubscriptions.erase(it);
     else
       it++;
   }
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.removeSubscriptionFromList");
+  JsValueList params;
+  params.push_back(shared_from_this());
+  func->Call(params);
+#endif
 }
 
 void Subscription::UpdateFilters()
 {
+#if !FILTER_ENGINE_STUBS
+  JsValuePtr func = jsEngine.Evaluate("API.updateSubscription");
+  JsValueList params;
+  params.push_back(shared_from_this());
+  func->Call(params);
+#endif
+}
+
+bool Subscription::IsUpdating()
+{
+#if FILTER_ENGINE_STUBS
+  return false;
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.isSubscriptionUpdating");
+  JsValueList params;
+  params.push_back(shared_from_this());
+  JsValuePtr result = func->Call(params);
+  return result->AsBool();
+#endif
+}
+
+bool Subscription::operator==(const Subscription& subscription) const
+{
+  return GetProperty("url", "") == subscription.GetProperty("url", "");
 }
 
 FilterEngine::FilterEngine(JsEngine& jsEngine) : jsEngine(jsEngine)
 {
 #if !FILTER_ENGINE_STUBS
   for (int i = 0; jsSources[i] && jsSources[i + 1]; i += 2)
     jsEngine.Evaluate(jsSources[i + 1], jsSources[i]);
 #endif
 }
 
 FilterPtr FilterEngine::GetFilter(const std::string& text)
 {
 #if FILTER_ENGINE_STUBS
   // Via http://stackoverflow.com/questions/216823/whats-the-best-way-to-trim-stdstring
   std::string trimmed(text);
   trimmed.erase(trimmed.begin(), std::find_if(trimmed.begin(), trimmed.end(), std::not1(std::ptr_fun<int, int>(std::isspace))));
   trimmed.erase(std::find_if(trimmed.rbegin(), trimmed.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), trimmed.end());
 
   std::map<std::string, FilterPtr>::const_iterator it = knownFilters.find(trimmed);
   if (it != knownFilters.end())
     return it->second;
 
   FilterPtr result(new Filter(*this, trimmed));
   knownFilters[trimmed] = result;
   return result;
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.getFilterFromText");
+  JsValueList params;
+  params.push_back(jsEngine.NewValue(text));
+  return FilterPtr(new Filter(func->Call(params)));
 #endif
 }
 
 SubscriptionPtr FilterEngine::GetSubscription(const std::string& url)
 {
 #if FILTER_ENGINE_STUBS
   std::map<std::string, SubscriptionPtr>::const_iterator it = knownSubscriptions.find(url);
   if (it != knownSubscriptions.end())
     return it->second;
 
   SubscriptionPtr result(new Subscription(*this, url));
   knownSubscriptions[url] = result;
   return result;
-#endif
-}
-
-const std::vector<FilterPtr>& FilterEngine::GetListedFilters() const
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.getSubscriptionFromUrl");
+  JsValueList params;
+  params.push_back(jsEngine.NewValue(url));
+  return SubscriptionPtr(new Subscription(func->Call(params)));
+#endif
+}
+
+const std::vector<FilterPtr> FilterEngine::GetListedFilters() const
 {
 #if FILTER_ENGINE_STUBS
   return listedFilters;
-#endif
-}
-
-const std::vector<SubscriptionPtr>& FilterEngine::GetListedSubscriptions() const
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.getListedFilters");
+  JsValueList values = func->Call()->AsList();
+  std::vector<FilterPtr> result;
+  for (JsValueList::iterator it = values.begin(); it != values.end(); it++)
+    result.push_back(FilterPtr(new Filter(*it)));
+  return result;
+#endif
+}
+
+const std::vector<SubscriptionPtr> FilterEngine::GetListedSubscriptions() const
 {
 #if FILTER_ENGINE_STUBS
   return listedSubscriptions;
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.getListedSubscriptions");
+  JsValueList values = func->Call()->AsList();
+  std::vector<SubscriptionPtr> result;
+  for (JsValueList::iterator it = values.begin(); it != values.end(); it++)
+    result.push_back(SubscriptionPtr(new Subscription(*it)));
+  return result;
 #endif
 }
 
 void FilterEngine::FetchAvailableSubscriptions(SubscriptionsCallback callback)
 {
 #if FILTER_ENGINE_STUBS
   std::vector<SubscriptionPtr> availableSubscriptions;
 
   SubscriptionPtr subscription1 = GetSubscription("https://easylist-downloads.adblockplus.org/easylist.txt");
   subscription1->SetProperty("title", "EasyList");
   availableSubscriptions.push_back(subscription1);
 
   SubscriptionPtr subscription2 = GetSubscription("https://easylist-downloads.adblockplus.org/easylistgermany+easylist.txt");
   subscription2->SetProperty("title", "EasyList Germany+EasyList");
   availableSubscriptions.push_back(subscription2);
 
   callback(availableSubscriptions);
+#else
+  // TODO!
 #endif
 }
 
 AdblockPlus::FilterPtr FilterEngine::Matches(const std::string& url,
     const std::string& contentType,
     const std::string& documentUrl)
 {
 #if FILTER_ENGINE_STUBS
   //For test on http://simple-adblock.com/faq/testing-your-adblocker/
   if (url.find("adbanner.gif") != std::string::npos)
     return GetFilter("adbanner.gif");
   else if (url.find("notbanner.gif") != std::string::npos)
     return GetFilter("@@notbanner.gif");
   else
     return AdblockPlus::FilterPtr();
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.checkFilterMatch");
+  JsValueList params;
+  params.push_back(jsEngine.NewValue(url));
+  params.push_back(jsEngine.NewValue(contentType));
+  params.push_back(jsEngine.NewValue(documentUrl));
+  JsValuePtr result = func->Call(params);
+  if (!result->IsNull())
+    return FilterPtr(new Filter(result));
+  else
+    return FilterPtr();
 #endif
 }
 
 std::vector<std::string> FilterEngine::GetElementHidingSelectors(const std::string& domain) const
 {
 #if FILTER_ENGINE_STUBS
   std::vector<std::string> selectors;
   selectors.push_back("#ad");
   selectors.push_back(".ad");
   //For test on http://simple-adblock.com/faq/testing-your-adblocker/
   if (domain == "simple-adblock.com")
     selectors.push_back(".ad_300x250");
   return selectors;
-#endif
-}
+#else
+  JsValuePtr func = jsEngine.Evaluate("API.getElementHidingSelectors");
+  JsValueList params;
+  params.push_back(jsEngine.NewValue(domain));
+  JsValueList result = func->Call(params)->AsList();
+  std::vector<std::string> selectors;
+  for (JsValueList::iterator it = result.begin(); it != result.end(); ++it)
+    selectors.push_back((*it)->AsString());
+  return selectors;
+#endif
+}