1 files changed, 217 insertions, 0 deletions
diff --git a/logic/minecraft/AssetsUtils.cpp b/logic/minecraft/AssetsUtils.cpp
new file mode 100644
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+++ b/logic/minecraft/AssetsUtils.cpp
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+/* Copyright 2013-2015 MultiMC Contributors
+ *
+ * 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 <QDir>
+#include <QDirIterator>
+#include <QCryptographicHash>
+#include <QJsonParseError>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QVariant>
+#include <QDebug>
+
+#include "AssetsUtils.h"
+#include <pathutils.h>
+
+namespace AssetsUtils
+{
+int findLegacyAssets()
+{
+	QDir assets_dir("assets");
+	if (!assets_dir.exists())
+		return 0;
+	assets_dir.setFilter(QDir::AllEntries | QDir::NoDotAndDotDot);
+	int base_length = assets_dir.path().length();
+
+	QList<QString> blacklist = {"indexes", "objects", "virtual"};
+
+	QDirIterator iterator(assets_dir, QDirIterator::Subdirectories);
+	int found = 0;
+	while (iterator.hasNext())
+	{
+		QString currentDir = iterator.next();
+		currentDir = currentDir.remove(0, base_length + 1);
+
+		bool ignore = false;
+		for (QString blacklisted : blacklist)
+		{
+			if (currentDir.startsWith(blacklisted))
+				ignore = true;
+		}
+
+		if (!iterator.fileInfo().isDir() && !ignore)
+		{
+			found++;
+		}
+	}
+
+	return found;
+}
+
+/*
+ * Returns true on success, with index populated
+ * index is undefined otherwise
+ */
+bool loadAssetsIndexJson(QString path, AssetsIndex *index)
+{
+	/*
+	{
+	  "objects": {
+		"icons/icon_16x16.png": {
+		  "hash": "bdf48ef6b5d0d23bbb02e17d04865216179f510a",
+		  "size": 3665
+		},
+		...
+		}
+	  }
+	}
+	*/
+
+	QFile file(path);
+
+	// Try to open the file and fail if we can't.
+	// TODO: We should probably report this error to the user.
+	if (!file.open(QIODevice::ReadOnly))
+	{
+		qCritical() << "Failed to read assets index file" << path;
+		return false;
+	}
+
+	// Read the file and close it.
+	QByteArray jsonData = file.readAll();
+	file.close();
+
+	QJsonParseError parseError;
+	QJsonDocument jsonDoc = QJsonDocument::fromJson(jsonData, &parseError);
+
+	// Fail if the JSON is invalid.
+	if (parseError.error != QJsonParseError::NoError)
+	{
+		qCritical() << "Failed to parse assets index file:" << parseError.errorString()
+					 << "at offset " << QString::number(parseError.offset);
+		return false;
+	}
+
+	// Make sure the root is an object.
+	if (!jsonDoc.isObject())
+	{
+		qCritical() << "Invalid assets index JSON: Root should be an array.";
+		return false;
+	}
+
+	QJsonObject root = jsonDoc.object();
+
+	QJsonValue isVirtual = root.value("virtual");
+	if (!isVirtual.isUndefined())
+	{
+		index->isVirtual = isVirtual.toBool(false);
+	}
+
+	QJsonValue objects = root.value("objects");
+	QVariantMap map = objects.toVariant().toMap();
+
+	for (QVariantMap::const_iterator iter = map.begin(); iter != map.end(); ++iter)
+	{
+		// qDebug() << iter.key();
+
+		QVariant variant = iter.value();
+		QVariantMap nested_objects = variant.toMap();
+
+		AssetObject object;
+
+		for (QVariantMap::const_iterator nested_iter = nested_objects.begin();
+			 nested_iter != nested_objects.end(); ++nested_iter)
+		{
+			// qDebug() << nested_iter.key() << nested_iter.value().toString();
+			QString key = nested_iter.key();
+			QVariant value = nested_iter.value();
+
+			if (key == "hash")
+			{
+				object.hash = value.toString();
+			}
+			else if (key == "size")
+			{
+				object.size = value.toDouble();
+			}
+		}
+
+		index->objects.insert(iter.key(), object);
+	}
+
+	return true;
+}
+
+QDir reconstructAssets(QString assetsId)
+{
+	QDir assetsDir = QDir("assets/");
+	QDir indexDir = QDir(PathCombine(assetsDir.path(), "indexes"));
+	QDir objectDir = QDir(PathCombine(assetsDir.path(), "objects"));
+	QDir virtualDir = QDir(PathCombine(assetsDir.path(), "virtual"));
+
+	QString indexPath = PathCombine(indexDir.path(), assetsId + ".json");
+	QFile indexFile(indexPath);
+	QDir virtualRoot(PathCombine(virtualDir.path(), assetsId));
+
+	if (!indexFile.exists())
+	{
+		qCritical() << "No assets index file" << indexPath << "; can't reconstruct assets";
+		return virtualRoot;
+	}
+
+	qDebug() << "reconstructAssets" << assetsDir.path() << indexDir.path()
+				 << objectDir.path() << virtualDir.path() << virtualRoot.path();
+
+	AssetsIndex index;
+	bool loadAssetsIndex = AssetsUtils::loadAssetsIndexJson(indexPath, &index);
+
+	if (loadAssetsIndex && index.isVirtual)
+	{
+		qDebug() << "Reconstructing virtual assets folder at" << virtualRoot.path();
+
+		for (QString map : index.objects.keys())
+		{
+			AssetObject asset_object = index.objects.value(map);
+			QString target_path = PathCombine(virtualRoot.path(), map);
+			QFile target(target_path);
+
+			QString tlk = asset_object.hash.left(2);
+
+			QString original_path =
+				PathCombine(PathCombine(objectDir.path(), tlk), asset_object.hash);
+			QFile original(original_path);
+			if (!original.exists())
+				continue;
+			if (!target.exists())
+			{
+				QFileInfo info(target_path);
+				QDir target_dir = info.dir();
+				// qDebug() << target_dir;
+				if (!target_dir.exists())
+					QDir("").mkpath(target_dir.path());
+
+				bool couldCopy = original.copy(target_path);
+				qDebug() << " Copying" << original_path << "to" << target_path
+							 << QString::number(couldCopy); // << original.errorString();
+			}
+		}
+
+		// TODO: Write last used time to virtualRoot/.lastused
+	}
+
+	return virtualRoot;
+}
+
+}