1 files changed, 98 insertions, 0 deletions
diff --git a/logic/URNResolver.cpp b/logic/URNResolver.cpp
new file mode 100644
index 00000000..b6bdcf41
--- /dev/null
+++ b/logic/URNResolver.cpp
@@ -0,0 +1,98 @@
+#include "URNResolver.h"
+#include <logger/QsLog.h>
+#include "MultiMC.h"
+#include "logic/forge/ForgeVersionList.h"
+#include "logic/forge/ForgeVersion.h"
+
+QString unescapeNSS(QString RawNSS)
+{
+	QString NSS;
+	NSS.reserve(RawNSS.size());
+	enum
+	{
+		Normal,
+		FirstHex,
+		SecondHex
+	} ParseState = Normal;
+
+	QByteArray translator("  ");
+
+	for (auto ch : RawNSS)
+	{
+		if(ParseState == Normal)
+		{
+			if(ch == '%')
+			{
+				ParseState = FirstHex;
+				continue;
+			}
+			else
+			{
+				NSS.append(ch);
+			}
+		}
+		if(ParseState == FirstHex)
+		{
+			translator[0] = ch.toLower().unicode();
+			ParseState = SecondHex;
+		}
+		else if(ParseState == SecondHex)
+		{
+			translator[1] = ch.toLower().unicode();
+			auto result = QByteArray::fromHex(translator);
+			if (result[0] == '\0')
+				return NSS;
+			NSS.append(result);
+			ParseState = Normal;
+		}
+	}
+	return NSS;
+}
+
+bool URNResolver::parse(const QString &URN, QString &NID, QString &NSS)
+{
+	QRegExp URNPattern(
+		"^urn:([a-z0-9][a-z0-9-]{0,31}):(([a-z0-9()+,\\-.:=@;$_!*']|%[0-9a-f]{2})+).*",
+		Qt::CaseInsensitive);
+	if (URNPattern.indexIn(URN) == -1)
+		return false;
+	auto captures = URNPattern.capturedTexts();
+	QString RawNID = captures[1];
+	QString RawNSS = captures[2];
+
+	NID = RawNID.toLower();
+	NSS = unescapeNSS(RawNSS);
+	return true;
+}
+
+URNResolver::URNResolver()
+{
+}
+
+QVariant URNResolver::resolve(QString URN)
+{
+	QString NID, NSS;
+	parse(URN, NID, NSS);
+
+	if(NID != "x-mmc")
+		return QVariant();
+	auto parts = NSS.split(":");
+	if(parts.size() < 1)
+		return QVariant();
+	unsigned int version = parts[0].toUInt();
+	switch(version)
+	{
+		case 1:
+			return resolveV1(parts.mid(1));
+		default:
+			return QVariant();
+	}
+}
+
+/**
+ * TODO: implement.
+ */
+QVariant URNResolver::resolveV1(QStringList parts)
+{
+	return QVariant();
+}