browser-window-ffi 0.0.5

#ifndef BW_CEF_EXTERNAL_INVOCATION_HANDLER
#define BW_CEF_EXTERNAL_INVOCATION_HANDLER


#include <include/cef_v8.h>
#include <optional>

#include "bw_handle_map.hpp"
#include "../assert.h"



namespace bw {

	class ExternalInvocationHandler : public CefV8Handler {
		CefRefPtr<CefBrowser> cef_browser;

	public:
		ExternalInvocationHandler( CefRefPtr<CefBrowser> browser ) : cef_browser(browser) {}

		virtual bool Execute(
			const CefString& name,
			CefRefPtr<CefV8Value> object,
			const CefV8ValueList& arguments,
			CefRefPtr<CefV8Value>& retval,
			CefString& exception
		) override  {

			if ( name == "invoke_extern" ) {

				CefRefPtr<CefProcessMessage> msg = CefProcessMessage::Create("invoke-handler");
				CefRefPtr<CefListValue> msg_args = msg->GetArgumentList();

				// Convert all function arguments to strings
				size_t index = 0;
				for ( auto it = arguments.begin(); it != arguments.end(); it++, index++ ) {

					CefString string = this->v8ValueToString(*it);

					msg_args->SetString( index, string );
				}

				this->cef_browser->GetMainFrame()->SendProcessMessage( PID_BROWSER, msg );
			}

			return false;
		}

	protected:
		// Convert a javascript value into a string, for very basic compatibility purposes with the Rust application
		// Note: This function is not yet complete. Not all types are converted appropriately.
		CefString v8ValueToString( CefRefPtr<CefV8Value> val ) {

			// If string
			if ( val->IsString() )
				return val->GetStringValue();

			// If boolean
			if ( val->IsBool() ) {

				if ( val->GetBoolValue() ) {
					return "true";
				}
				else {
					return "false";
				}
			}

			// TODO: Convert all other possible javascript types to string as well

			// If type is not accounted for, return this string:
			return "[type not supported yet]";
		}

		IMPLEMENT_REFCOUNTING(ExternalInvocationHandler);
	};
}



#endif//BW_CEF_EXTERNAL_INVOCATION_HANDLER