1 files changed, 83 insertions, 0 deletions
diff --git a/launcher/meta/JsonFormat.h b/launcher/meta/JsonFormat.h
new file mode 100644
index 00000000..93217b7e
--- /dev/null
+++ b/launcher/meta/JsonFormat.h
@@ -0,0 +1,83 @@
+/* Copyright 2015-2021 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 <QJsonObject>
+#include <memory>
+
+#include "Exception.h"
+#include "meta/BaseEntity.h"
+#include <set>
+
+namespace Meta
+{
+class Index;
+class Version;
+class VersionList;
+
+enum class MetadataVersion
+{
+    Invalid = -1,
+    InitialRelease = 1
+};
+
+class ParseException : public Exception
+{
+public:
+    using Exception::Exception;
+};
+struct Require
+{
+    bool operator==(const Require & rhs) const
+    {
+        return uid == rhs.uid;
+    }
+    bool operator<(const Require & rhs) const
+    {
+        return uid < rhs.uid;
+    }
+    bool deepEquals(const Require & rhs) const
+    {
+        return uid == rhs.uid
+            && equalsVersion == rhs.equalsVersion
+            && suggests == rhs.suggests;
+    }
+    QString uid;
+    QString equalsVersion;
+    QString suggests;
+};
+
+inline Q_DECL_PURE_FUNCTION uint qHash(const Require &key, uint seed = 0) Q_DECL_NOTHROW
+{
+    return qHash(key.uid, seed);
+}
+
+using RequireSet = std::set<Require>;
+
+void parseIndex(const QJsonObject &obj, Index *ptr);
+void parseVersion(const QJsonObject &obj, Version *ptr);
+void parseVersionList(const QJsonObject &obj, VersionList *ptr);
+
+MetadataVersion parseFormatVersion(const QJsonObject &obj, bool required = true);
+void serializeFormatVersion(QJsonObject &obj, MetadataVersion version);
+
+// FIXME: this has a different shape than the others...FIX IT!?
+void parseRequires(const QJsonObject &obj, RequireSet * ptr, const char * keyName = "requires");
+void serializeRequires(QJsonObject & objOut, RequireSet* ptr, const char * keyName = "requires");
+MetadataVersion currentFormatVersion();
+}
+
+Q_DECLARE_METATYPE(std::set<Meta::Require>)