From 295a27741873cea1bbeb486cac4fb192c4a20c2f Mon Sep 17 00:00:00 2001
From: Lefteris Karapetsas <lefteris@refu.co>
Date: Tue, 27 Jan 2015 13:15:08 +0100
Subject: [PATCH] Fixes and cleanup in OurWebThreeStubServer

- All fixes are Natspec related
---
 alethzero/OurWebThreeStubServer.cpp | 53 ++++++++++++++++++-----------
 alethzero/OurWebThreeStubServer.h   | 11 +++---
 2 files changed, 40 insertions(+), 24 deletions(-)

diff --git a/alethzero/OurWebThreeStubServer.cpp b/alethzero/OurWebThreeStubServer.cpp
index 6c129dcd9..37d37bce1 100644
--- a/alethzero/OurWebThreeStubServer.cpp
+++ b/alethzero/OurWebThreeStubServer.cpp
@@ -31,19 +31,19 @@ using namespace std;
 using namespace dev;
 using namespace dev::eth;
 
-OurWebThreeStubServer::OurWebThreeStubServer(jsonrpc::AbstractServerConnector& _conn, dev::WebThreeDirect& _web3,
-											 std::vector<dev::KeyPair> const& _accounts, Main* main):
+OurWebThreeStubServer::OurWebThreeStubServer(jsonrpc::AbstractServerConnector& _conn, WebThreeDirect& _web3,
+											 vector<KeyPair> const& _accounts, Main* main):
 	WebThreeStubServer(_conn, _web3, _accounts), m_web3(&_web3), m_main(main)
 {}
 
-std::string OurWebThreeStubServer::shh_newIdentity()
+string OurWebThreeStubServer::shh_newIdentity()
 {
-	dev::KeyPair kp = dev::KeyPair::create();
+	KeyPair kp = dev::KeyPair::create();
 	emit onNewId(QString::fromStdString(toJS(kp.sec())));
 	return toJS(kp.pub());
 }
 
-bool OurWebThreeStubServer::showAuthenticationPopup(std::string const& _title, std::string const& _text) const
+bool OurWebThreeStubServer::showAuthenticationPopup(string const& _title, string const& _text) const
 {
 	QMessageBox userInput;
 	userInput.setText(QString::fromStdString(_title));
@@ -55,16 +55,31 @@ bool OurWebThreeStubServer::showAuthenticationPopup(std::string const& _title, s
 	return userInput.exec() == QMessageBox::Ok;
 }
 
-bool OurWebThreeStubServer::authenticate(dev::TransactionSkeleton const& _t)
+void OurWebThreeStubServer::showBasicValueTransferNotice(u256 _value) const
+{
+	QMessageBox notice;
+	notice.setText("Basic Value Transfer Transaction");
+	notice.setInformativeText(QString::fromStdString("Value is " + toString(_value)));
+	notice.setStandardButtons(QMessageBox::Ok);
+	notice.exec();
+}
+
+bool OurWebThreeStubServer::authenticate(TransactionSkeleton const& _t)
 {
 	h256 contractCodeHash = m_web3->ethereum()->postState().codeHash(_t.to);
 	if (contractCodeHash == EmptySHA3)
-		// recipient has no code - nothing special about this transaction.
-		// TODO: show basic message for value transfer.
+		// contract creation
 		return true;
 
-	std::string userNotice = m_main->lookupNatSpecUserNotice(contractCodeHash, _t.data);
-	
+	if (false) //TODO: When is is just a value transfer?
+	{
+		// recipient has no code - nothing special about this transaction, show basic value transfer info
+		showBasicValueTransferNotice(_t.value);
+		return true;
+	}
+
+	string userNotice = m_main->lookupNatSpecUserNotice(contractCodeHash, _t.data);
+
 	if (userNotice.empty())
 		return showAuthenticationPopup("Unverified Pending Transaction",
 									   "An undocumented transaction is about to be executed.");
@@ -83,17 +98,17 @@ QNatspecExpressionEvaluator::QNatspecExpressionEvaluator(OurWebThreeStubServer*
 QNatspecExpressionEvaluator::~QNatspecExpressionEvaluator()
 {}
 
-QString QNatspecExpressionEvaluator::evalExpression(QString const& _expression)
+QString QNatspecExpressionEvaluator::evalExpression(QString const& _expression) const
 {
-	
-	// evaluate the natspec
+	// load natspec.js only when we need it for natspec evaluation
 	m_main->evalRaw(contentsOfQResource(":/js/natspec.js"));
-	
-	// _expression should be in the format like this
-	// auto toEval = QString::fromStdString("the result of calling multiply(4) is `multiply(4)`");
-	auto toEval = _expression;
-	auto result = m_main->evalRaw("evaluateExpression('" + toEval + "')");
-	
+	QVariant result = m_main->evalRaw("evaluateExpression('" + _expression + "')");
+	if (result.type() == QVariant::Invalid)
+	{
+		cerr << "Could not evaluate natspec expression: \"" << _expression.toStdString() << "\"" << endl;
+		// return the expression unevaluated
+		return _expression;
+	}
 	return result.toString();
 }
 
diff --git a/alethzero/OurWebThreeStubServer.h b/alethzero/OurWebThreeStubServer.h
index 53558b121..5223d79bd 100644
--- a/alethzero/OurWebThreeStubServer.h
+++ b/alethzero/OurWebThreeStubServer.h
@@ -42,6 +42,7 @@ signals:
 
 private:
 	bool showAuthenticationPopup(std::string const& _title, std::string const& _text) const;
+	void showBasicValueTransferNotice(dev::u256 _value) const;
 
 	dev::WebThreeDirect* m_web3;
 	Main* m_main;
@@ -51,14 +52,14 @@ private:
 class QNatspecExpressionEvaluator: public QObject
 {
 	Q_OBJECT
-	
+
 public:
 	QNatspecExpressionEvaluator(OurWebThreeStubServer* _server, Main* _main);
 	virtual ~QNatspecExpressionEvaluator();
-	
-	QString evalExpression(QString const& _expression);
-	
+
+	QString evalExpression(QString const& _expression) const;
+
 private:
 	OurWebThreeStubServer* m_server;
 	Main* m_main;
-};
\ No newline at end of file
+};