Removed old plugin system and implemented some version list stuff.

1 files changed, 489 insertions, 0 deletions

diff --git a/libmultimc/src/minecraftversionlist.cpp b/libmultimc/src/minecraftversionlist.cpp
new file mode 100644
index 00000000..ce02a769
--- /dev/null
+++ b/libmultimc/src/minecraftversionlist.cpp
@@ -0,0 +1,489 @@
+/* Copyright 2013 Andrew Okin
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "include/minecraftversionlist.h"
+
+#include <QDebug>
+
+#include <QtXml>
+
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonArray>
+#include <QJsonValue>
+#include <QJsonParseError>
+
+#include <QtNetwork>
+
+#define MCVLIST_URLBASE "http://s3.amazonaws.com/Minecraft.Download/versions/"
+#define ASSETS_URLBASE "http://assets.minecraft.net/"
+#define MCN_URLBASE "http://sonicrules.org/mcnweb.py"
+
+MinecraftVersionList mcVList;
+
+MinecraftVersionList::MinecraftVersionList(QObject *parent) :
+	InstVersionList(parent)
+{
+	
+}
+
+Task *MinecraftVersionList::getLoadTask()
+{
+	return new MCVListLoadTask(this);
+}
+
+bool MinecraftVersionList::isLoaded()
+{
+	return m_loaded;
+}
+
+const InstVersion *MinecraftVersionList::at(int i) const
+{
+	return m_vlist.at(i);
+}
+
+int MinecraftVersionList::count() const
+{
+	return m_vlist.count();
+}
+
+void MinecraftVersionList::printToStdOut() const
+{
+	qDebug() << "---------------- Version List ----------------";
+	
+	for (int i = 0; i < m_vlist.count(); i++)
+	{
+		MinecraftVersion *version = qobject_cast<MinecraftVersion *>(m_vlist.at(i));
+		
+		if (!version)
+			continue;
+		
+		qDebug() << "Version " << version->name();
+		qDebug() << "\tDownload: " << version->downloadURL();
+		qDebug() << "\tTimestamp: " << version->timestamp();
+		qDebug() << "\tType: " << version->typeName();
+		qDebug() << "----------------------------------------------";
+	}
+}
+
+MinecraftVersionList &MinecraftVersionList::getMainList()
+{
+	return mcVList;
+}
+
+void MinecraftVersionList::updateListData(QList<InstVersion *> versions)
+{
+	// First, we populate a temporary list with the copies of the versions.
+	QList<InstVersion *> tempList;
+	for (int i = 0; i < versions.length(); i++)
+	{
+		InstVersion *version = versions[i]->copyVersion(this);
+		Q_ASSERT(version != NULL);
+		tempList.append(version);
+	}
+	
+	// Now we swap the temporary list into the actual version list.
+	// This applies our changes to the version list immediately and still gives us 
+	// access to the old version list so that we can delete the objects in it and 
+	// free their memory. By doing this, we cause the version list to update as 
+	// quickly as possible.
+	beginResetModel();
+	m_vlist.swap(tempList);
+	m_loaded = true;
+	endResetModel();
+	
+	// We called swap, so all the data that was in the version list previously is now in 
+	// tempList (and vice-versa). Now we just free the memory.
+	while (!tempList.isEmpty())
+		delete tempList.takeFirst();
+}
+
+inline QDomElement getDomElementByTagName(QDomElement parent, QString tagname)
+{
+	QDomNodeList elementList = parent.elementsByTagName(tagname);
+	if (elementList.count())
+		return elementList.at(0).toElement();
+	else
+		return QDomElement();
+}
+
+inline QDateTime timeFromS3Time(QString str)
+{
+	const QString fmt("yyyy-MM-dd'T'HH:mm:ss'.000Z'");
+	return QDateTime::fromString(str, fmt);
+}
+
+inline void waitForNetRequest(QNetworkReply *netReply)
+{
+	QEventLoop loop;
+	loop.connect(netReply, SIGNAL(finished()), SLOT(quit()));
+	loop.exec();
+}
+
+
+MCVListLoadTask::MCVListLoadTask(MinecraftVersionList *vlist)
+{
+	m_list = vlist;
+	m_currentStable = NULL;
+}
+
+MCVListLoadTask::~MCVListLoadTask()
+{
+//	delete netMgr;
+}
+
+void MCVListLoadTask::executeTask()
+{
+	setSubStatus();
+	
+	QNetworkAccessManager networkMgr;
+	netMgr = &networkMgr;
+	
+	if (!loadFromVList())
+	{
+		qDebug() << "Failed to load from Mojang version list.";
+	}
+	if (!loadFromAssets())
+	{
+		qDebug() << "Failed to load assets version list.";
+	}
+	if (!loadMCNostalgia())
+	{
+		qDebug() << "Failed to load MCNostalgia version list.";
+	}
+	finalize();
+}
+
+void MCVListLoadTask::setSubStatus(const QString msg)
+{
+	if (msg.isEmpty())
+		setStatus("Loading instance version list...");
+	else
+		setStatus("Loading instance version list: " + msg);
+}
+
+bool MCVListLoadTask::loadFromVList()
+{
+	QNetworkReply *vlistReply = netMgr->get(QNetworkRequest(QUrl(QString(MCVLIST_URLBASE) + 
+																 "versions.json")));
+	waitForNetRequest(vlistReply);
+	
+	switch (vlistReply->error())
+	{
+	case QNetworkReply::NoError:
+	{
+		QJsonParseError jsonError;
+		QJsonDocument jsonDoc = QJsonDocument::fromJson(vlistReply->readAll(), &jsonError);
+		
+		if (jsonError.error == QJsonParseError::NoError)
+		{
+			Q_ASSERT_X(jsonDoc.isObject(), "loadFromVList", "jsonDoc is not an object");
+			
+			QJsonObject root = jsonDoc.object();
+			
+			// Get the ID of the latest release and the latest snapshot.
+			Q_ASSERT_X(root.value("latest").isObject(), "loadFromVList", 
+					   "version list is missing 'latest' object");
+			QJsonObject latest = root.value("latest").toObject();
+			
+			QString latestReleaseID = latest.value("release").toString("");
+			QString latestSnapshotID = latest.value("snapshot").toString("");
+			Q_ASSERT_X(!latestReleaseID.isEmpty(), "loadFromVList", "latest release field is missing");
+			Q_ASSERT_X(!latestSnapshotID.isEmpty(), "loadFromVList", "latest snapshot field is missing");
+			
+			// Now, get the array of versions.
+			Q_ASSERT_X(root.value("versions").isArray(), "loadFromVList", 
+					   "version list object is missing 'versions' array");
+			QJsonArray versions = root.value("versions").toArray();
+			
+			for (int i = 0; i < versions.count(); i++)
+			{
+				// Load the version info.
+				Q_ASSERT_X(versions[i].isObject(), "loadFromVList",
+						   QString("in versions array, index %1 is not an object").
+						   arg(i).toUtf8());
+				QJsonObject version = versions[i].toObject();
+				
+				QString versionID = version.value("id").toString("");
+				QString versionTimeStr = version.value("time").toString("");
+				QString versionTypeStr = version.value("type").toString("");
+				
+				Q_ASSERT_X(!versionID.isEmpty(), "loadFromVList", 
+						   QString("in versions array, index %1's \"id\" field is not a valid string").
+						   arg(i).toUtf8());
+				Q_ASSERT_X(!versionTimeStr.isEmpty(), "loadFromVList",
+						   QString("in versions array, index %1's \"time\" field is not a valid string").
+						   arg(i).toUtf8());
+				Q_ASSERT_X(!versionTypeStr.isEmpty(), "loadFromVList", 
+						   QString("in versions array, index %1's \"type\" field is not a valid string").
+						   arg(i).toUtf8());
+				
+				
+				// Now, process that info and add the version to the list.
+				
+				// Parse the timestamp.
+				QDateTime versionTime = timeFromS3Time(versionTimeStr);
+				
+				// Parse the type.
+				MinecraftVersion::VersionType versionType;
+				if (versionTypeStr == "release")
+				{
+					// Check if this version is the current stable version.
+					if (versionID == latestReleaseID)
+						versionType = MinecraftVersion::CurrentStable;
+					else
+						versionType = MinecraftVersion::Stable;
+				}
+				else
+				{
+					versionType = MinecraftVersion::Snapshot;
+				}
+				
+				// Get the download URL.
+				QString dlUrl = QString(MCVLIST_URLBASE) + versionID + "/";
+				
+				
+				// Now, we construct the version object and add it to the list.
+				MinecraftVersion *mcVersion = new MinecraftVersion(
+							versionID, versionID, versionTime.toMSecsSinceEpoch(),
+							dlUrl, "");
+				mcVersion->setVersionType(versionType);
+				tempList.append(mcVersion);
+			}
+		}
+		else
+		{
+			qDebug() << "Error parsing version list JSON:" << jsonError.errorString();
+		}
+		
+		break;
+	}
+		
+	default:
+		// TODO: Network error handling.
+		qDebug() << "Failed to load Minecraft main version list" << vlistReply->errorString();
+		break;
+	}
+	
+	return true;
+}
+
+bool MCVListLoadTask::loadFromAssets()
+{
+	setSubStatus("Loading versions from assets.minecraft.net...");
+	
+	bool succeeded = false;
+	
+	QNetworkReply *assetsReply = netMgr->get(QNetworkRequest(QUrl(ASSETS_URLBASE)));
+	waitForNetRequest(assetsReply);
+	
+	switch (assetsReply->error())
+	{
+	case QNetworkReply::NoError:
+	{
+		// Get the XML string.
+		QString xmlString = assetsReply->readAll();
+		
+		QString xmlErrorMsg;
+		
+		QDomDocument doc;
+		if (!doc.setContent(xmlString, false, &xmlErrorMsg))
+		{
+			// TODO: Display error message to the user.
+			qDebug() << "Failed to process assets.minecraft.net. XML error:" <<
+						xmlErrorMsg << xmlString;
+		}
+		
+		QDomNodeList contents = doc.elementsByTagName("Contents");
+		
+		QRegExp mcRegex("/minecraft.jar$");
+		QRegExp snapshotRegex("[0-9][0-9]w[0-9][0-9][a-z]|pre|rc");
+		
+		for (int i = 0; i < contents.length(); i++)
+		{
+			QDomElement element = contents.at(i).toElement();
+			
+			if (element.isNull())
+				continue;
+			
+			QDomElement keyElement = getDomElementByTagName(element, "Key");
+			QDomElement lastmodElement = getDomElementByTagName(element, "LastModified");
+			QDomElement etagElement = getDomElementByTagName(element, "ETag");
+			
+			if (keyElement.isNull() || lastmodElement.isNull() || etagElement.isNull())
+				continue;
+			
+			QString key = keyElement.text();
+			QString lastModStr = lastmodElement.text();
+			QString etagStr = etagElement.text();
+			
+			if (!key.contains(mcRegex))
+				continue;
+			
+			QString versionDirName = key.left(key.length() - 14);
+			QString dlUrl = QString("http://assets.minecraft.net/%1/").arg(versionDirName);
+			
+			QString versionName = versionDirName.replace("_", ".");
+			
+			QDateTime versionTimestamp = timeFromS3Time(lastModStr);
+			if (!versionTimestamp.isValid())
+			{
+				qDebug(QString("Failed to parse timestamp for version %1 %2").
+					   arg(versionName, lastModStr).toUtf8());
+				versionTimestamp = QDateTime::currentDateTime();
+			}
+			
+			if (m_currentStable)
+			{
+				{
+					bool older = versionTimestamp.toMSecsSinceEpoch() < m_currentStable->timestamp();
+					bool newer = versionTimestamp.toMSecsSinceEpoch() > m_currentStable->timestamp();
+					bool isSnapshot = versionName.contains(snapshotRegex);
+					
+					MinecraftVersion *version = new MinecraftVersion(
+								versionName, versionName, 
+								versionTimestamp.toMSecsSinceEpoch(),
+								dlUrl, etagStr);
+					
+					if (newer)
+					{
+						version->setVersionType(MinecraftVersion::Snapshot);
+					}
+					else if (older && isSnapshot)
+					{
+						version->setVersionType(MinecraftVersion::OldSnapshot);
+					}
+					else if (older)
+					{
+						version->setVersionType(MinecraftVersion::Stable);
+					}
+					else
+					{
+						// Shouldn't happen, but just in case...
+						version->setVersionType(MinecraftVersion::CurrentStable);
+					}
+					
+					assetsList.push_back(version);
+				}
+			}
+			else // If there isn't a current stable version.
+			{
+				bool isSnapshot = versionName.contains(snapshotRegex);
+				
+				MinecraftVersion *version = new MinecraftVersion(
+							versionName, versionName, 
+							versionTimestamp.toMSecsSinceEpoch(),
+							dlUrl, etagStr);
+				version->setVersionType(isSnapshot? MinecraftVersion::Snapshot :
+													MinecraftVersion::Stable);
+				assetsList.push_back(version);
+			}
+		}
+		
+		setSubStatus("Loaded assets.minecraft.net");
+		succeeded = true;
+		break;
+	}
+		
+	default:
+		// TODO: Network error handling.
+		qDebug() << "Failed to load assets.minecraft.net" << assetsReply->errorString();
+		break;
+	}
+	
+	processedAssetsReply = true;
+	updateStuff();
+	return succeeded;
+}
+
+bool MCVListLoadTask::loadMCNostalgia()
+{
+	QNetworkReply *mcnReply = netMgr->get(QNetworkRequest(QUrl(QString(MCN_URLBASE) + "?pversion=1&list=True")));
+	waitForNetRequest(mcnReply);
+	return true;
+}
+
+bool MCVListLoadTask::finalize()
+{
+	// First, we need to do some cleanup. We loaded assets versions into assetsList,
+	// MCNostalgia versions into mcnList and all the others into tempList. MCNostalgia 
+	// provides some versions that are on assets.minecraft.net and we want to ignore 
+	// those, so we remove and delete them from mcnList. assets.minecraft.net also provides
+	// versions that are on Mojang's version list and we want to ignore those as well.
+	
+	// To start, we get a list of the descriptors in tmpList.
+	QStringList tlistDescriptors;
+	for (int i = 0; i < tempList.count(); i++)
+		tlistDescriptors.append(tempList.at(i)->descriptor());
+	
+	// Now, we go through our assets version list and remove anything with
+	// a descriptor that matches one we already have in tempList.
+	for (int i = 0; i < assetsList.count(); i++)
+		if (tlistDescriptors.contains(assetsList.at(i)->descriptor()))
+			delete assetsList.takeAt(i--); // We need to decrement here because we're removing an item.
+	
+	// We also need to rebuild the list of descriptors.
+	tlistDescriptors.clear();
+	for (int i = 0; i < tempList.count(); i++)
+		tlistDescriptors.append(tempList.at(i)->descriptor());
+	
+	// Next, we go through our MCNostalgia version list and do the same thing.
+	for (int i = 0; i < mcnList.count(); i++)
+		if (tlistDescriptors.contains(mcnList.at(i)->descriptor()))
+			delete mcnList.takeAt(i--); // We need to decrement here because we're removing an item.
+	
+	// Now that the duplicates are gone, we need to merge the lists. This is
+	// simple enough.
+	tempList.append(assetsList);
+	tempList.append(mcnList);
+	
+	// We're done with these lists now, but the items have been moved over to 
+	// tempList, so we don't need to delete them yet.
+	
+	// Now, we invoke the updateListData slot on the GUI thread. This will copy all
+	// the versions we loaded and set their parents to the version list.
+	// Then, it will swap the new list with the old one and free the old list's memory.
+	QMetaObject::invokeMethod(m_list, "updateListData", Qt::BlockingQueuedConnection, 
+							  Q_ARG(QList<InstVersion*>, tempList));
+	
+	// Once that's finished, we can delete the versions in our temp list.
+	while (!tempList.isEmpty())
+		delete tempList.takeFirst();
+	
+#ifdef PRINT_VERSIONS
+	m_list->printToStdOut();
+#endif
+	return true;
+}
+
+void MCVListLoadTask::updateStuff()
+{
+	const int totalReqs = 3;
+	int reqsComplete = 0;
+	
+	if (processedMCVListReply)
+		reqsComplete++;
+	if (processedAssetsReply)
+		reqsComplete++;
+	if (processedMCNReply)
+		reqsComplete++;
+	
+	calcProgress(reqsComplete, totalReqs);
+	
+	if (reqsComplete >= totalReqs)
+	{
+		quit();
+	}
+}