Implement gradle spec reader/writer

logic/minecraft/GradleSpecifier.h

@@ -0,0 +1,83 @@
+#pragma once
+
+#include <QString>
+#include <QStringList>
+#include "logic/DefaultVariable.h"
+
+struct GradleSpecifier
+{
+	GradleSpecifier()
+	{
+		m_valid = false;
+	}
+	GradleSpecifier(QString value)
+	{
+		operator=(value);
+	}
+	GradleSpecifier & operator =(const QString & value)
+	{
+		/*
+		org.gradle.test.classifiers : service : 1.0 : jdk15 @ jar
+		DEBUG   0 "org.gradle.test.classifiers:service:1.0:jdk15@jar" 
+		DEBUG   1 "org.gradle.test.classifiers" 
+		DEBUG   2 "service" 
+		DEBUG   3 "1.0" 
+		DEBUG   4 ":jdk15" 
+		DEBUG   5 "jdk15" 
+		DEBUG   6 "@jar" 
+		DEBUG   7 "jar"
+		*/
+		QRegExp matcher("([^:@]+):([^:@]+):([^:@]+)" "(:([^:@]+))?" "(@([^:@]+))?");
+		m_valid = matcher.exactMatch(value);
+		auto elements = matcher.capturedTexts();
+		groupId = elements[1];
+		artifactId = elements[2];
+		version = elements[3];
+		classifier = elements[5];
+		if(!elements[7].isEmpty())
+		{
+			extension = elements[7];
+		}
+		return *this;
+	}
+	operator QString() const
+	{
+		if(!m_valid)
+			return "INVALID";
+		QString retval = groupId + ":" + artifactId + ":" + version;
+		if(!classifier.isEmpty())
+		{
+			retval += ":" + classifier;
+		}
+		if(extension.isExplicit())
+		{
+			retval += "@" + extension;
+		}
+		return retval;
+	}
+	QString toPath() const
+	{
+		if(!m_valid)
+			return "INVALID";
+		QString path = groupId;
+		path.replace('.', '/');
+		path += '/' + artifactId + '/' + version + '/' + artifactId + '-' + version;
+		if(!classifier.isEmpty())
+		{
+			path += "-" + classifier;
+		}
+		path += "." + extension;
+		return path;
+	}
+	bool valid()
+	{
+		return m_valid;
+	}
+private:
+	QString groupId;
+	QString artifactId;
+	QString version;
+	QString classifier;
+	DefaultVariable<QString> extension = DefaultVariable<QString>("jar");
+	bool m_valid = false;
+};

logic/minecraft/OneSixLibrary.cpp

@@ -65,7 +65,10 @@ void OneSixLibrary::finalize()
 	m_decentname = parts[1];
 	m_decentversion = minVersion = parts[2];
 	m_storage_path = relative;
-	m_download_url = m_base_url + relative;
+	if(m_base_url.isEmpty())
+		m_download_url = QString("https://" + URLConstants::LIBRARY_BASE) + relative;
+	else
+		m_download_url = m_base_url + relative;
 
 	if (m_rules.empty())
 	{

logic/minecraft/RawLibrary.cpp

@@ -13,20 +13,20 @@ RawLibraryPtr RawLibrary::fromJson(const QJsonObject &libObj, const QString &fil
 	}
 	out->m_name = libObj.value("name").toString();
 
-	auto readString = [libObj, filename](const QString & key, QString & variable)
+	auto readString = [libObj, filename](const QString & key, QString & variable) -> bool
 	{
-		if (libObj.contains(key))
+		if (!libObj.contains(key))
+			return false;
+		QJsonValue val = libObj.value(key);
+
+		if (!val.isString())
 		{
-			QJsonValue val = libObj.value(key);
-			if (!val.isString())
-			{
-				QLOG_WARN() << key << "is not a string in" << filename << "(skipping)";
-			}
-			else
-			{
-				variable = val.toString();
-			}
+			QLOG_WARN() << key << "is not a string in" << filename << "(skipping)";
+			return false;
 		}
+
+		variable = val.toString();
+		return true;
 	};
 
 	readString("url", out->m_base_url);

logic/minecraft/RawLibrary.h

@@ -28,10 +28,11 @@ public: /* methods */
 	
 public: /* data */
 	QString m_name;
-	QString m_base_url = "https://" + URLConstants::LIBRARY_BASE;
+	QString m_base_url;
+
 	/// type hint - modifies how the library is treated
 	QString m_hint;
-	/// absolute URL. takes precedence over m_download_path, if defined
+	/// DEPRECATED: absolute URL. takes precedence over m_download_path, if defined
 	QString m_absolute_url;
 
 	bool applyExcludes = false;