NOISSUE simplify.

20 files changed, 191 insertions, 536 deletions

diff --git a/api/logic/CMakeLists.txt b/api/logic/CMakeLists.txt
index b605fbd3..42754157 100644
--- a/api/logic/CMakeLists.txt
+++ b/api/logic/CMakeLists.txt
@@ -420,8 +420,6 @@ set(META_SOURCES
 	meta/tasks/RemoteLoadTask.h
 	meta/tasks/LocalLoadTask.cpp
 	meta/tasks/LocalLoadTask.h
-	meta/format/FormatV1.cpp
-	meta/format/FormatV1.h
 	meta/format/Format.cpp
 	meta/format/Format.h
 	meta/BaseEntity.cpp
diff --git a/api/logic/Env.cpp b/api/logic/Env.cpp
index 903f1d8a..d7be4a28 100644
--- a/api/logic/Env.cpp
+++ b/api/logic/Env.cpp
@@ -124,7 +124,7 @@ void Env::initHttpMetaCache()
 	m_metacache->addBase("root", QDir::currentPath());
 	m_metacache->addBase("translations", QDir("translations").absolutePath());
 	m_metacache->addBase("icons", QDir("cache/icons").absolutePath());
-	m_metacache->addBase("meta", QDir("cache/meta").absolutePath());
+	m_metacache->addBase("meta", QDir("meta").absolutePath());
 	m_metacache->Load();
 }
 
diff --git a/api/logic/meta/BaseEntity.cpp b/api/logic/meta/BaseEntity.cpp
index fd44e29c..87cd55c8 100644
--- a/api/logic/meta/BaseEntity.cpp
+++ b/api/logic/meta/BaseEntity.cpp
@@ -24,19 +24,18 @@ BaseEntity::~BaseEntity()
 {
 }
 
-void BaseEntity::store() const
+QUrl BaseEntity::url() const
 {
-	Json::write(serialized(), Meta::localDir().absoluteFilePath(localFilename()));
+	return rootUrl().resolved(localFilename());
 }
 
 void BaseEntity::notifyLocalLoadComplete()
 {
 	m_localLoaded = true;
-	store();
 }
+
 void BaseEntity::notifyRemoteLoadComplete()
 {
 	m_remoteLoaded = true;
-	store();
 }
 }
diff --git a/api/logic/meta/BaseEntity.h b/api/logic/meta/BaseEntity.h
index b7a241c6..7064e9d2 100644
--- a/api/logic/meta/BaseEntity.h
+++ b/api/logic/meta/BaseEntity.h
@@ -17,6 +17,7 @@
 
 #include <QObject>
 #include <memory>
+#include <QJsonObject>
 
 #include "multimc_logic_export.h"
 
@@ -33,10 +34,10 @@ public:
 	virtual std::unique_ptr<Task> remoteUpdateTask() = 0;
 	virtual std::unique_ptr<Task> localUpdateTask() = 0;
 	virtual void merge(const std::shared_ptr<BaseEntity> &other) = 0;
+	virtual void parse(const QJsonObject &obj) = 0;
 
-	void store() const;
 	virtual QString localFilename() const = 0;
-	virtual QJsonObject serialized() const = 0;
+	virtual QUrl url() const;
 
 	bool isComplete() const { return m_localLoaded || m_remoteLoaded; }
 
diff --git a/api/logic/meta/Index.cpp b/api/logic/meta/Index.cpp
index 8a6b1355..e0e8bc5d 100644
--- a/api/logic/meta/Index.cpp
+++ b/api/logic/meta/Index.cpp
@@ -80,29 +80,36 @@ QVariant Index::headerData(int section, Qt::Orientation orientation, int role) c
 
 std::unique_ptr<Task> Index::remoteUpdateTask()
 {
-	return std::unique_ptr<IndexRemoteLoadTask>(new IndexRemoteLoadTask(this, this));
+	return std::unique_ptr<RemoteLoadTask>(new RemoteLoadTask(this));
 }
 std::unique_ptr<Task> Index::localUpdateTask()
 {
-	return std::unique_ptr<IndexLocalLoadTask>(new IndexLocalLoadTask(this, this));
-}
-
-QJsonObject Index::serialized() const
-{
-	return Format::serializeIndex(this);
+	return std::unique_ptr<LocalLoadTask>(new LocalLoadTask(this));
 }
 
 bool Index::hasUid(const QString &uid) const
 {
 	return m_uids.contains(uid);
 }
-VersionListPtr Index::getList(const QString &uid) const
+
+VersionListPtr Index::get(const QString &uid)
 {
 	return m_uids.value(uid, nullptr);
 }
-VersionListPtr Index::getListGuaranteed(const QString &uid) const
+
+VersionPtr Index::get(const QString &uid, const QString &version)
+{
+	auto list = get(uid);
+	if(list)
+	{
+		return list->getVersion(version);
+	}
+	return nullptr;
+}
+
+void Index::parse(const QJsonObject& obj)
 {
-	return m_uids.value(uid, std::make_shared<VersionList>(uid));
+	parseIndex(obj, this);
 }
 
 void Index::merge(const Ptr &other)
diff --git a/api/logic/meta/Index.h b/api/logic/meta/Index.h
index 16e95d5a..37341656 100644
--- a/api/logic/meta/Index.h
+++ b/api/logic/meta/Index.h
@@ -27,6 +27,7 @@ class Task;
 namespace Meta
 {
 using VersionListPtr = std::shared_ptr<class VersionList>;
+using VersionPtr = std::shared_ptr<class Version>;
 
 class MULTIMC_LOGIC_EXPORT Index : public QAbstractListModel, public BaseEntity
 {
@@ -51,17 +52,21 @@ public:
 	std::unique_ptr<Task> localUpdateTask() override;
 
 	QString localFilename() const override { return "index.json"; }
-	QJsonObject serialized() const override;
 
 	// queries
+	VersionListPtr get(const QString &uid);
+	VersionPtr get(const QString &uid, const QString &version);
 	bool hasUid(const QString &uid) const;
+	/*
 	VersionListPtr getList(const QString &uid) const;
 	VersionListPtr getListGuaranteed(const QString &uid) const;
+	*/
 
 	QVector<VersionListPtr> lists() const { return m_lists; }
 
 public: // for usage by parsers only
 	void merge(const BaseEntity::Ptr &other) override;
+	void parse(const QJsonObject &obj) override;
 
 private:
 	QVector<VersionListPtr> m_lists;
diff --git a/api/logic/meta/Index_test.cpp b/api/logic/meta/Index_test.cpp
index d26700ca..b4dbd009 100644
--- a/api/logic/meta/Index_test.cpp
+++ b/api/logic/meta/Index_test.cpp
@@ -27,9 +27,9 @@ slots:
 		Meta::Index windex({std::make_shared<Meta::VersionList>("list1"), std::make_shared<Meta::VersionList>("list2"), std::make_shared<Meta::VersionList>("list3")});
 		QVERIFY(windex.hasUid("list1"));
 		QVERIFY(!windex.hasUid("asdf"));
-		QVERIFY(windex.getList("list2") != nullptr);
-		QCOMPARE(windex.getList("list2")->uid(), QString("list2"));
-		QVERIFY(windex.getList("adsf") == nullptr);
+		QVERIFY(windex.get("list2") != nullptr);
+		QCOMPARE(windex.get("list2")->uid(), QString("list2"));
+		QVERIFY(windex.get("adsf") == nullptr);
 	}
 
 	void test_merge()
diff --git a/api/logic/meta/Util.h b/api/logic/meta/Util.h
index 28163fe4..188bcaa3 100644
--- a/api/logic/meta/Util.h
+++ b/api/logic/meta/Util.h
@@ -24,8 +24,5 @@ class QDir;
 namespace Meta
 {
 MULTIMC_LOGIC_EXPORT QUrl rootUrl();
-MULTIMC_LOGIC_EXPORT QUrl indexUrl();
-MULTIMC_LOGIC_EXPORT QUrl versionListUrl(const QString &uid);
-MULTIMC_LOGIC_EXPORT QUrl versionUrl(const QString &uid, const QString &version);
 MULTIMC_LOGIC_EXPORT QDir localDir();
 }
diff --git a/api/logic/meta/Version.cpp b/api/logic/meta/Version.cpp
index 039f4fef..b79c178a 100644
--- a/api/logic/meta/Version.cpp
+++ b/api/logic/meta/Version.cpp
@@ -48,11 +48,16 @@ QDateTime Version::time() const
 
 std::unique_ptr<Task> Version::remoteUpdateTask()
 {
-	return std::unique_ptr<VersionRemoteLoadTask>(new VersionRemoteLoadTask(this, this));
+	return std::unique_ptr<RemoteLoadTask>(new RemoteLoadTask(this));
 }
 std::unique_ptr<Task> Version::localUpdateTask()
 {
-	return std::unique_ptr<VersionLocalLoadTask>(new VersionLocalLoadTask(this, this));
+	return std::unique_ptr<LocalLoadTask>(new LocalLoadTask(this));
+}
+
+void Version::parse(const QJsonObject& obj)
+{
+	parseVersion(obj, this);
 }
 
 void Version::merge(const std::shared_ptr<BaseEntity> &other)
@@ -78,10 +83,6 @@ QString Version::localFilename() const
 {
 	return m_uid + '/' + m_version + ".json";
 }
-QJsonObject Version::serialized() const
-{
-	return Format::serializeVersion(this);
-}
 
 void Version::setType(const QString &type)
 {
diff --git a/api/logic/meta/Version.h b/api/logic/meta/Version.h
index 4a791880..635b79f6 100644
--- a/api/logic/meta/Version.h
+++ b/api/logic/meta/Version.h
@@ -59,9 +59,9 @@ public:
 	std::unique_ptr<Task> remoteUpdateTask() override;
 	std::unique_ptr<Task> localUpdateTask() override;
 	void merge(const std::shared_ptr<BaseEntity> &other) override;
+	void parse(const QJsonObject &obj) override;
 
 	QString localFilename() const override;
-	QJsonObject serialized() const override;
 
 public: // for usage by format parsers only
 	void setType(const QString &type);
diff --git a/api/logic/meta/VersionList.cpp b/api/logic/meta/VersionList.cpp
index aab3e0f7..7196d4be 100644
--- a/api/logic/meta/VersionList.cpp
+++ b/api/logic/meta/VersionList.cpp
@@ -169,21 +169,17 @@ QHash<int, QByteArray> VersionList::roleNames() const
 
 std::unique_ptr<Task> VersionList::remoteUpdateTask()
 {
-	return std::unique_ptr<VersionListRemoteLoadTask>(new VersionListRemoteLoadTask(this, this));
+	return std::unique_ptr<RemoteLoadTask>(new RemoteLoadTask(this));
 }
 std::unique_ptr<Task> VersionList::localUpdateTask()
 {
-	return std::unique_ptr<VersionListLocalLoadTask>(new VersionListLocalLoadTask(this, this));
+	return std::unique_ptr<LocalLoadTask>(new LocalLoadTask(this));
 }
 
 QString VersionList::localFilename() const
 {
 	return m_uid + "/index.json";
 }
-QJsonObject VersionList::serialized() const
-{
-	return Format::serializeVersionList(this);
-}
 
 QString VersionList::humanReadable() const
 {
@@ -224,6 +220,11 @@ void VersionList::setVersions(const QVector<VersionPtr> &versions)
 	endResetModel();
 }
 
+void VersionList::parse(const QJsonObject& obj)
+{
+	parseVersionList(obj, this);
+}
+
 void VersionList::merge(const BaseEntity::Ptr &other)
 {
 	const VersionListPtr list = std::dynamic_pointer_cast<VersionList>(other);
@@ -285,4 +286,5 @@ BaseVersionPtr VersionList::getRecommended() const
 
 }
 
+
 #include "VersionList.moc"
diff --git a/api/logic/meta/VersionList.h b/api/logic/meta/VersionList.h
index 0eb85bf8..934b20e4 100644
--- a/api/logic/meta/VersionList.h
+++ b/api/logic/meta/VersionList.h
@@ -17,6 +17,7 @@
 
 #include "BaseVersionList.h"
 #include "BaseEntity.h"
+#include <QJsonObject>
 #include <memory>
 
 namespace Meta
@@ -57,7 +58,6 @@ public:
 	std::unique_ptr<Task> localUpdateTask() override;
 
 	QString localFilename() const override;
-	QJsonObject serialized() const override;
 
 	QString uid() const { return m_uid; }
 	QString name() const { return m_name; }
@@ -72,6 +72,7 @@ public: // for usage only by parsers
 	void setName(const QString &name);
 	void setVersions(const QVector<VersionPtr> &versions);
 	void merge(const BaseEntity::Ptr &other) override;
+	void parse(const QJsonObject &obj) override;
 
 signals:
 	void nameChanged(const QString &name);
diff --git a/api/logic/meta/format/Format.cpp b/api/logic/meta/format/Format.cpp
index e0fddb0b..39d3f14f 100644
--- a/api/logic/meta/format/Format.cpp
+++ b/api/logic/meta/format/Format.cpp
@@ -15,15 +15,85 @@
 
 #include "Format.h"
 
-#include "FormatV1.h"
+#include "minecraft/onesix/OneSixVersionFormat.h""
 
 #include "meta/Index.h"
 #include "meta/Version.h"
 #include "meta/VersionList.h"
 
+#include "Json.h"
+using namespace Json;
+
 namespace Meta
 {
 
+static const int currentFormatVersion = 0;
+
+// Index
+static BaseEntity::Ptr parseIndexInternal(const QJsonObject &obj)
+{
+	const QVector<QJsonObject> objects = requireIsArrayOf<QJsonObject>(obj, "packages");
+	QVector<VersionListPtr> lists;
+	lists.reserve(objects.size());
+	std::transform(objects.begin(), objects.end(), std::back_inserter(lists), [](const QJsonObject &obj)
+	{
+		VersionListPtr list = std::make_shared<VersionList>(requireString(obj, "uid"));
+		list->setName(ensureString(obj, "name", QString()));
+		return list;
+	});
+	return std::make_shared<Index>(lists);
+}
+
+// Version
+static VersionPtr parseCommonVersion(const QString &uid, const QJsonObject &obj)
+{
+	const QVector<QJsonObject> requiresRaw = obj.contains("requires") ? requireIsArrayOf<QJsonObject>(obj, "requires") : QVector<QJsonObject>();
+	QVector<Reference> requires;
+	requires.reserve(requiresRaw.size());
+	std::transform(requiresRaw.begin(), requiresRaw.end(), std::back_inserter(requires), [](const QJsonObject &rObj)
+	{
+		Reference ref(requireString(rObj, "uid"));
+		ref.setVersion(ensureString(rObj, "version", QString()));
+		return ref;
+	});
+
+	VersionPtr version = std::make_shared<Version>(uid, requireString(obj, "version"));
+	version->setTime(QDateTime::fromString(requireString(obj, "releaseTime"), Qt::ISODate).toMSecsSinceEpoch() / 1000);
+	version->setType(ensureString(obj, "type", QString()));
+	version->setRequires(requires);
+	return version;
+}
+
+static BaseEntity::Ptr parseVersionInternal(const QJsonObject &obj)
+{
+	VersionPtr version = parseCommonVersion(requireString(obj, "uid"), obj);
+
+	version->setData(OneSixVersionFormat::versionFileFromJson(QJsonDocument(obj),
+										   QString("%1/%2.json").arg(version->uid(), version->version()),
+										   obj.contains("order")));
+	return version;
+}
+
+// Version list / package
+static BaseEntity::Ptr parseVersionListInternal(const QJsonObject &obj)
+{
+	const QString uid = requireString(obj, "uid");
+
+	const QVector<QJsonObject> versionsRaw = requireIsArrayOf<QJsonObject>(obj, "versions");
+	QVector<VersionPtr> versions;
+	versions.reserve(versionsRaw.size());
+	std::transform(versionsRaw.begin(), versionsRaw.end(), std::back_inserter(versions), [uid](const QJsonObject &vObj)
+	{
+		return parseCommonVersion(uid, vObj);
+	});
+
+	VersionListPtr list = std::make_shared<VersionList>(uid);
+	list->setName(ensureString(obj, "name", QString()));
+	list->setVersions(versions);
+	return list;
+}
+
+
 static int formatVersion(const QJsonObject &obj)
 {
 	if (!obj.contains("formatVersion")) {
@@ -35,56 +105,39 @@ static int formatVersion(const QJsonObject &obj)
 	return obj.value("formatVersion").toInt();
 }
 
-void Format::parseIndex(const QJsonObject &obj, Index *ptr)
+void parseIndex(const QJsonObject &obj, Index *ptr)
 {
 	const int version = formatVersion(obj);
 	switch (version) {
 	case 0:
-		ptr->merge(FormatV1().parseIndexInternal(obj));
+		ptr->merge(parseIndexInternal(obj));
 		break;
 	default:
 		throw ParseException(QObject::tr("Unknown formatVersion: %1").arg(version));
 	}
 }
 
-void Format::parseVersionList(const QJsonObject &obj, VersionList *ptr)
+void parseVersionList(const QJsonObject &obj, VersionList *ptr)
 {
 	const int version = formatVersion(obj);
 	switch (version) {
 	case 0:
-		ptr->merge(FormatV1().parseVersionListInternal(obj));
+		ptr->merge(parseVersionListInternal(obj));
 		break;
 	default:
 		throw ParseException(QObject::tr("Unknown formatVersion: %1").arg(version));
 	}
 }
 
-void Format::parseVersion(const QJsonObject &obj, Version *ptr)
+void parseVersion(const QJsonObject &obj, Version *ptr)
 {
 	const int version = formatVersion(obj);
 	switch (version) {
 	case 0:
-		ptr->merge(FormatV1().parseVersionInternal(obj));
+		ptr->merge(parseVersionInternal(obj));
 		break;
 	default:
 		throw ParseException(QObject::tr("Unknown formatVersion: %1").arg(version));
 	}
 }
-
-
-QJsonObject Format::serializeIndex(const Index *ptr)
-{
-	return FormatV1().serializeIndexInternal(ptr);
-}
-
-QJsonObject Format::serializeVersionList(const VersionList *ptr)
-{
-	return FormatV1().serializeVersionListInternal(ptr);
-}
-
-QJsonObject Format::serializeVersion(const Version *ptr)
-{
-	return FormatV1().serializeVersionInternal(ptr);
-}
-
 }
diff --git a/api/logic/meta/format/Format.h b/api/logic/meta/format/Format.h
index 79605a6f..aaed07fc 100644
--- a/api/logic/meta/format/Format.h
+++ b/api/logic/meta/format/Format.h
@@ -33,25 +33,8 @@ public:
 	using Exception::Exception;
 };
 
-class Format
-{
-public:
-	virtual ~Format() {}
-
-	static void parseIndex(const QJsonObject &obj, Index *ptr);
-	static void parseVersion(const QJsonObject &obj, Version *ptr);
-	static void parseVersionList(const QJsonObject &obj, VersionList *ptr);
+void parseIndex(const QJsonObject &obj, Index *ptr);
+void parseVersion(const QJsonObject &obj, Version *ptr);
+void parseVersionList(const QJsonObject &obj, VersionList *ptr);
 
-	static QJsonObject serializeIndex(const Index *ptr);
-	static QJsonObject serializeVersion(const Version *ptr);
-	static QJsonObject serializeVersionList(const VersionList *ptr);
-
-protected:
-	virtual BaseEntity::Ptr parseIndexInternal(const QJsonObject &obj) const = 0;
-	virtual BaseEntity::Ptr parseVersionInternal(const QJsonObject &obj) const = 0;
-	virtual BaseEntity::Ptr parseVersionListInternal(const QJsonObject &obj) const = 0;
-	virtual QJsonObject serializeIndexInternal(const Index *ptr) const = 0;
-	virtual QJsonObject serializeVersionInternal(const Version *ptr) const = 0;
-	virtual QJsonObject serializeVersionListInternal(const VersionList *ptr) const = 0;
-};
 }
diff --git a/api/logic/meta/format/FormatV1.cpp b/api/logic/meta/format/FormatV1.cpp
deleted file mode 100644
index ee2c5291..00000000
--- a/api/logic/meta/format/FormatV1.cpp
+++ /dev/null
@@ -1,170 +0,0 @@
-/* Copyright 2015-2017 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 "FormatV1.h"
-#include <minecraft/onesix/OneSixVersionFormat.h>
-
-#include "Json.h"
-
-#include "meta/Index.h"
-#include "meta/Version.h"
-#include "meta/VersionList.h"
-#include "Env.h"
-
-using namespace Json;
-
-namespace Meta
-{
-
-static const int currentFormatVersion = 0;
-
-// Index
-
-BaseEntity::Ptr FormatV1::parseIndexInternal(const QJsonObject &obj) const
-{
-	const QVector<QJsonObject> objects = requireIsArrayOf<QJsonObject>(obj, "packages");
-	QVector<VersionListPtr> lists;
-	lists.reserve(objects.size());
-	std::transform(objects.begin(), objects.end(), std::back_inserter(lists), [](const QJsonObject &obj)
-	{
-		VersionListPtr list = std::make_shared<VersionList>(requireString(obj, "uid"));
-		list->setName(ensureString(obj, "name", QString()));
-		return list;
-	});
-	return std::make_shared<Index>(lists);
-}
-
-QJsonObject FormatV1::serializeIndexInternal(const Index *ptr) const
-{
-	QJsonArray packages;
-	for (const VersionListPtr &list : ptr->lists())
-	{
-		QJsonObject out;
-		out["uid"] = list->uid();
-		out["name"] = list->name();
-		packages.append(out);
-	}
-	QJsonObject out;
-	out["formatVersion"] = currentFormatVersion;
-	out["packages"] = packages;
-	return out;
-}
-
-
-// Version
-
-static VersionPtr parseCommonVersion(const QString &uid, const QJsonObject &obj)
-{
-	const QVector<QJsonObject> requiresRaw = obj.contains("requires") ? requireIsArrayOf<QJsonObject>(obj, "requires") : QVector<QJsonObject>();
-	QVector<Reference> requires;
-	requires.reserve(requiresRaw.size());
-	std::transform(requiresRaw.begin(), requiresRaw.end(), std::back_inserter(requires), [](const QJsonObject &rObj)
-	{
-		Reference ref(requireString(rObj, "uid"));
-		ref.setVersion(ensureString(rObj, "version", QString()));
-		return ref;
-	});
-
-	VersionPtr version = std::make_shared<Version>(uid, requireString(obj, "version"));
-	version->setTime(QDateTime::fromString(requireString(obj, "releaseTime"), Qt::ISODate).toMSecsSinceEpoch() / 1000);
-	version->setType(ensureString(obj, "type", QString()));
-	version->setRequires(requires);
-	return version;
-}
-
-BaseEntity::Ptr FormatV1::parseVersionInternal(const QJsonObject &obj) const
-{
-	VersionPtr version = parseCommonVersion(requireString(obj, "uid"), obj);
-
-	version->setData(OneSixVersionFormat::versionFileFromJson(QJsonDocument(obj),
-										   QString("%1/%2.json").arg(version->uid(), version->version()),
-										   obj.contains("order")));
-	return version;
-}
-
-static void serializeCommonVersion(const Version *version, QJsonObject &obj)
-{
-	QJsonArray requires;
-	for (const Reference &ref : version->requires())
-	{
-		if (ref.version().isEmpty())
-		{
-			QJsonObject out;
-			out["uid"] = ref.uid();
-			requires.append(out);
-		}
-		else
-		{
-			QJsonObject out;
-			out["uid"] = ref.uid();
-			out["version"] = ref.version();
-			requires.append(out);
-		}
-	}
-
-	obj.insert("version", version->version());
-	obj.insert("type", version->type());
-	obj.insert("releaseTime", version->time().toString(Qt::ISODate));
-	obj.insert("requires", requires);
-}
-
-QJsonObject FormatV1::serializeVersionInternal(const Version *ptr) const
-{
-	QJsonObject obj = OneSixVersionFormat::versionFileToJson(ptr->data(), true).object();
-	serializeCommonVersion(ptr, obj);
-	obj.insert("formatVersion", currentFormatVersion);
-	obj.insert("uid", ptr->uid());
-	// TODO: the name should be looked up in the UI based on the uid
-	obj.insert("name", ENV.metadataIndex()->getListGuaranteed(ptr->uid())->name());
-
-	return obj;
-}
-
-
-// Version list / package
-
-BaseEntity::Ptr FormatV1::parseVersionListInternal(const QJsonObject &obj) const
-{
-	const QString uid = requireString(obj, "uid");
-
-	const QVector<QJsonObject> versionsRaw = requireIsArrayOf<QJsonObject>(obj, "versions");
-	QVector<VersionPtr> versions;
-	versions.reserve(versionsRaw.size());
-	std::transform(versionsRaw.begin(), versionsRaw.end(), std::back_inserter(versions), [this, uid](const QJsonObject &vObj)
-	{ return parseCommonVersion(uid, vObj); });
-
-	VersionListPtr list = std::make_shared<VersionList>(uid);
-	list->setName(ensureString(obj, "name", QString()));
-	list->setVersions(versions);
-	return list;
-}
-
-QJsonObject FormatV1::serializeVersionListInternal(const VersionList *ptr) const
-{
-	QJsonArray versions;
-	for (const VersionPtr &version : ptr->versions())
-	{
-		QJsonObject obj;
-		serializeCommonVersion(version.get(), obj);
-		versions.append(obj);
-	}
-	QJsonObject out;
-	out["formatVersion"] = currentFormatVersion;
-	out["uid"] = ptr->uid();
-	out["name"] = ptr->name().isNull() ? QJsonValue() : ptr->name();
-	out["versions"] = versions;
-	return out;
-}
-}
diff --git a/api/logic/meta/format/FormatV1.h b/api/logic/meta/format/FormatV1.h
deleted file mode 100644
index ab986083..00000000
--- a/api/logic/meta/format/FormatV1.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/* Copyright 2015-2017 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.
- */
-
-#pragma once
-
-#include "Format.h"
-
-namespace Meta
-{
-class FormatV1 : public Format
-{
-public:
-	BaseEntity::Ptr parseIndexInternal(const QJsonObject &obj) const override;
-	BaseEntity::Ptr parseVersionInternal(const QJsonObject &obj) const override;
-	BaseEntity::Ptr parseVersionListInternal(const QJsonObject &obj) const override;
-
-	QJsonObject serializeIndexInternal(const Index *ptr) const override;
-	QJsonObject serializeVersionInternal(const Version *ptr) const override;
-	QJsonObject serializeVersionListInternal(const VersionList *ptr) const override;
-};
-}
diff --git a/api/logic/meta/tasks/LocalLoadTask.cpp b/api/logic/meta/tasks/LocalLoadTask.cpp
index 33ea8016..b64fc5d3 100644
--- a/api/logic/meta/tasks/LocalLoadTask.cpp
+++ b/api/logic/meta/tasks/LocalLoadTask.cpp
@@ -34,19 +34,18 @@ LocalLoadTask::LocalLoadTask(BaseEntity *entity, QObject *parent)
 
 void LocalLoadTask::executeTask()
 {
-	const QString fname = Meta::localDir().absoluteFilePath(filename());
+	const QString fname = Meta::localDir().absoluteFilePath(m_entity->localFilename());
 	if (!QFile::exists(fname))
 	{
 		emitFailed(tr("File doesn't exist"));
 		return;
 	}
-
-	setStatus(tr("Reading %1...").arg(name()));
+	setStatus(tr("Reading %1...").arg(fname));
 	setProgress(0, 0);
 
 	try
 	{
-		parse(Json::requireObject(Json::requireDocument(fname, name()), name()));
+		m_entity->parse(Json::requireObject(Json::requireDocument(fname, fname), fname));
 		m_entity->notifyLocalLoadComplete();
 		emitSucceeded();
 	}
@@ -55,69 +54,4 @@ void LocalLoadTask::executeTask()
 		emitFailed(tr("Unable to parse file %1: %2").arg(fname, e.cause()));
 	}
 }
-
-
-// INDEX
-IndexLocalLoadTask::IndexLocalLoadTask(Index *index, QObject *parent)
-	: LocalLoadTask(index, parent)
-{
-}
-QString IndexLocalLoadTask::filename() const
-{
-	return "index.json";
-}
-QString IndexLocalLoadTask::name() const
-{
-	return tr("Metadata Index");
-}
-void IndexLocalLoadTask::parse(const QJsonObject &obj) const
-{
-	Format::parseIndex(obj, dynamic_cast<Index *>(entity()));
-}
-
-
-// VERSION LIST
-VersionListLocalLoadTask::VersionListLocalLoadTask(VersionList *list, QObject *parent)
-	: LocalLoadTask(list, parent)
-{
-}
-QString VersionListLocalLoadTask::filename() const
-{
-	return list()->uid() + ".json";
-}
-QString VersionListLocalLoadTask::name() const
-{
-	return tr("Version List for %1").arg(list()->humanReadable());
-}
-void VersionListLocalLoadTask::parse(const QJsonObject &obj) const
-{
-	Format::parseVersionList(obj, list());
-}
-VersionList *VersionListLocalLoadTask::list() const
-{
-	return dynamic_cast<VersionList *>(entity());
-}
-
-
-// VERSION
-VersionLocalLoadTask::VersionLocalLoadTask(Version *version, QObject *parent)
-	: LocalLoadTask(version, parent)
-{
-}
-QString VersionLocalLoadTask::filename() const
-{
-	return version()->uid() + "/" + version()->version() + ".json";
-}
-QString VersionLocalLoadTask::name() const
-{
-	return tr(" Version for %1").arg(version()->name());
-}
-void VersionLocalLoadTask::parse(const QJsonObject &obj) const
-{
-	Format::parseVersion(obj, version());
-}
-Version *VersionLocalLoadTask::version() const
-{
-	return dynamic_cast<Version *>(entity());
-}
 }
diff --git a/api/logic/meta/tasks/LocalLoadTask.h b/api/logic/meta/tasks/LocalLoadTask.h
index 36ae1b6f..905660ed 100644
--- a/api/logic/meta/tasks/LocalLoadTask.h
+++ b/api/logic/meta/tasks/LocalLoadTask.h
@@ -25,60 +25,15 @@ class Index;
 class VersionList;
 class Version;
 
+// FIXME: this is now just an odd function, get rid of it
 class LocalLoadTask : public Task
 {
 	Q_OBJECT
 public:
 	explicit LocalLoadTask(BaseEntity *entity, QObject *parent = nullptr);
 
-protected:
-	virtual QString filename() const = 0;
-	virtual QString name() const = 0;
-	virtual void parse(const QJsonObject &obj) const = 0;
-
-	BaseEntity *entity() const { return m_entity; }
-
 private:
 	void executeTask() override;
-
 	BaseEntity *m_entity;
 };
-
-class IndexLocalLoadTask : public LocalLoadTask
-{
-	Q_OBJECT
-public:
-	explicit IndexLocalLoadTask(Index *index, QObject *parent = nullptr);
-
-private:
-	QString filename() const override;
-	QString name() const override;
-	void parse(const QJsonObject &obj) const override;
-};
-class VersionListLocalLoadTask : public LocalLoadTask
-{
-	Q_OBJECT
-public:
-	explicit VersionListLocalLoadTask(VersionList *list, QObject *parent = nullptr);
-
-private:
-	QString filename() const override;
-	QString name() const override;
-	void parse(const QJsonObject &obj) const override;
-
-	VersionList *list() const;
-};
-class VersionLocalLoadTask : public LocalLoadTask
-{
-	Q_OBJECT
-public:
-	explicit VersionLocalLoadTask(Version *version, QObject *parent = nullptr);
-
-private:
-	QString filename() const override;
-	QString name() const override;
-	void parse(const QJsonObject &obj) const override;
-
-	Version *version() const;
-};
 }
diff --git a/api/logic/meta/tasks/RemoteLoadTask.cpp b/api/logic/meta/tasks/RemoteLoadTask.cpp
index 69a59c07..b73af021 100644
--- a/api/logic/meta/tasks/RemoteLoadTask.cpp
+++ b/api/logic/meta/tasks/RemoteLoadTask.cpp
@@ -34,99 +34,70 @@ RemoteLoadTask::RemoteLoadTask(BaseEntity *entity, QObject *parent)
 {
 }
 
-void RemoteLoadTask::executeTask()
-{
-	NetJob *job = new NetJob(name());
-
-	auto entry = ENV.metacache()->resolveEntry("meta", url().toString());
-	entry->setStale(true);
-	m_dl = Net::Download::makeCached(url(), entry);
-	job->addNetAction(m_dl);
-	connect(job, &NetJob::failed, this, &RemoteLoadTask::emitFailed);
-	connect(job, &NetJob::succeeded, this, &RemoteLoadTask::networkFinished);
-	connect(job, &NetJob::status, this, &RemoteLoadTask::setStatus);
-	connect(job, &NetJob::progress, this, &RemoteLoadTask::setProgress);
-	job->start();
-}
-
-void RemoteLoadTask::networkFinished()
+class ParsingValidator : public Net::Validator
 {
-	setStatus(tr("Parsing..."));
-	setProgress(0, 0);
+public: /* con/des */
+	ParsingValidator(BaseEntity *entity) : m_entity(entity)
+	{
+	};
+	virtual ~ParsingValidator()
+	{
+	};
 
-	try
+public: /* methods */
+	bool init(QNetworkRequest &) override
 	{
-		parse(Json::requireObject(Json::requireDocument(m_dl->getTargetFilepath(), name()), name()));
-		m_entity->notifyRemoteLoadComplete();
-		emitSucceeded();
+		return true;
 	}
-	catch (Exception &e)
+	bool write(QByteArray & data) override
 	{
-		emitFailed(tr("Unable to parse response: %1").arg(e.cause()));
+		this->data.append(data);
+		return true;
+	}
+	bool abort() override
+	{
+		return true;
+	}
+	bool validate(QNetworkReply &) override
+	{
+		auto fname = m_entity->localFilename();
+		try
+		{
+			m_entity->parse(Json::requireObject(Json::requireDocument(data, fname), fname));
+			m_entity->notifyRemoteLoadComplete();
+			return true;
+		}
+		catch (Exception &e)
+		{
+			qWarning() << "Unable to parse response:" << e.cause();
+			return false;
+		}
 	}
-}
-
-// INDEX
-IndexRemoteLoadTask::IndexRemoteLoadTask(Index *index, QObject *parent)
-	: RemoteLoadTask(index, parent)
-{
-}
-QUrl IndexRemoteLoadTask::url() const
-{
-	return Meta::indexUrl();
-}
-QString IndexRemoteLoadTask::name() const
-{
-	return tr("Metadata Index");
-}
-void IndexRemoteLoadTask::parse(const QJsonObject &obj) const
-{
-	Format::parseIndex(obj, dynamic_cast<Index *>(entity()));
-}
 
+private: /* data */
+	QByteArray data;
+	BaseEntity *m_entity;
+};
 
-// VERSION LIST
-VersionListRemoteLoadTask::VersionListRemoteLoadTask(VersionList *list, QObject *parent)
-	: RemoteLoadTask(list, parent)
-{
-}
-QUrl VersionListRemoteLoadTask::url() const
-{
-	return Meta::versionListUrl(list()->uid());
-}
-QString VersionListRemoteLoadTask::name() const
-{
-	return tr("Version List for %1").arg(list()->humanReadable());
-}
-void VersionListRemoteLoadTask::parse(const QJsonObject &obj) const
-{
-	Format::parseVersionList(obj, list());
-}
-VersionList* Meta::VersionListRemoteLoadTask::list() const
+void RemoteLoadTask::executeTask()
 {
-	return dynamic_cast<VersionList *>(entity());
-}
+	// FIXME: leak here!!!
+	NetJob *job = new NetJob(tr("Download of meta file %1").arg(m_entity->localFilename()));
 
-
-// VERSION
-VersionRemoteLoadTask::VersionRemoteLoadTask(Version *version, QObject *parent)
-	: RemoteLoadTask(version, parent)
-{
-}
-QUrl VersionRemoteLoadTask::url() const
-{
-	return Meta::versionUrl(version()->uid(), version()->version());
-}
-QString VersionRemoteLoadTask::name() const
-{
-	return tr("Meta Version for %1").arg(version()->name());
-}
-void VersionRemoteLoadTask::parse(const QJsonObject &obj) const
-{
-	Format::parseVersion(obj, version());
-}
-Version *VersionRemoteLoadTask::version() const
-{
-	return dynamic_cast<Version *>(entity());
+	auto url = m_entity->url();
+	auto entry = ENV.metacache()->resolveEntry("meta", m_entity->localFilename());
+	entry->setStale(true);
+	m_dl = Net::Download::makeCached(url, entry);
+	/*
+	 * The validator parses the file and loads it into the object.
+	 * If that fails, the file is not written to storage.
+	 */
+	m_dl->addValidator(new ParsingValidator(m_entity));
+	job->addNetAction(m_dl);
+	connect(job, &NetJob::failed, this, &RemoteLoadTask::emitFailed);
+	connect(job, &NetJob::succeeded, this, &RemoteLoadTask::succeeded);
+	connect(job, &NetJob::status, this, &RemoteLoadTask::setStatus);
+	connect(job, &NetJob::progress, this, &RemoteLoadTask::setProgress);
+	job->start();
 }
 }
diff --git a/api/logic/meta/tasks/RemoteLoadTask.h b/api/logic/meta/tasks/RemoteLoadTask.h
index 3b09404f..6d81d8ea 100644
--- a/api/logic/meta/tasks/RemoteLoadTask.h
+++ b/api/logic/meta/tasks/RemoteLoadTask.h
@@ -30,66 +30,17 @@ class Index;
 class VersionList;
 class Version;
 
+// FIXME: this is now just an oddly constructed NetJob, get rid of it.
 class RemoteLoadTask : public Task
 {
 	Q_OBJECT
 public:
 	explicit RemoteLoadTask(BaseEntity *entity, QObject *parent = nullptr);
 
-protected:
-	virtual QUrl url() const = 0;
-	virtual QString name() const = 0;
-	virtual void parse(const QJsonObject &obj) const = 0;
-
-	BaseEntity *entity() const { return m_entity; }
-
-private slots:
-	void networkFinished();
-
 private:
 	void executeTask() override;
 
 	BaseEntity *m_entity;
 	std::shared_ptr<Net::Download> m_dl;
 };
-
-class IndexRemoteLoadTask : public RemoteLoadTask
-{
-	Q_OBJECT
-public:
-	explicit IndexRemoteLoadTask(Index *index, QObject *parent = nullptr);
-
-private:
-	QUrl url() const override;
-	QString name() const override;
-	void parse(const QJsonObject &obj) const override;
-};
-
-class VersionListRemoteLoadTask : public RemoteLoadTask
-{
-	Q_OBJECT
-public:
-	explicit VersionListRemoteLoadTask(VersionList *list, QObject *parent = nullptr);
-
-private:
-	QUrl url() const override;
-	QString name() const override;
-	void parse(const QJsonObject &obj) const override;
-
-	VersionList *list() const;
-};
-
-class VersionRemoteLoadTask : public RemoteLoadTask
-{
-	Q_OBJECT
-public:
-	explicit VersionRemoteLoadTask(Version *version, QObject *parent = nullptr);
-
-private:
-	QUrl url() const override;
-	QString name() const override;
-	void parse(const QJsonObject &obj) const override;
-
-	Version *version() const;
-};
 }