1 files changed, 92 insertions, 0 deletions
diff --git a/lib/events/stateevent.h b/lib/events/stateevent.h
new file mode 100644
index 00000000..6032132e
--- /dev/null
+++ b/lib/events/stateevent.h
@@ -0,0 +1,92 @@
+/******************************************************************************
+* Copyright (C) 2018 Kitsune Ral <kitsune-ral@users.sf.net>
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation; either
+* version 2.1 of the License, or (at your option) any later version.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#pragma once
+
+#include "roomevent.h"
+
+namespace QMatrixClient {
+    class StateEventBase: public RoomEvent
+    {
+        public:
+            using factory_t = EventFactory<StateEventBase>;
+
+            using RoomEvent::RoomEvent;
+            ~StateEventBase() override = default;
+
+            bool isStateEvent() const override { return true; }
+            virtual bool repeatsState() const;
+    };
+    using StateEventPtr = event_ptr_tt<StateEventBase>;
+    using StateEvents = EventsArray<StateEventBase>;
+
+    template <typename ContentT>
+    struct Prev
+    {
+        template <typename... ContentParamTs>
+        explicit Prev(const QJsonObject& unsignedJson,
+                      ContentParamTs&&... contentParams)
+            : senderId(unsignedJson.value("prev_sender"_ls).toString())
+            , content(unsignedJson.value(PrevContentKeyL).toObject(),
+                       std::forward<ContentParamTs>(contentParams)...)
+        { }
+
+        QString senderId;
+        ContentT content;
+    };
+
+    template <typename ContentT>
+    class StateEvent: public StateEventBase
+    {
+        public:
+            using content_type = ContentT;
+
+            template <typename... ContentParamTs>
+            explicit StateEvent(Type type, const QJsonObject& fullJson,
+                                ContentParamTs&&... contentParams)
+                : StateEventBase(type, fullJson)
+                , _content(contentJson(),
+                           std::forward<ContentParamTs>(contentParams)...)
+            {
+                const auto& unsignedData = unsignedJson();
+                if (unsignedData.contains(PrevContentKeyL))
+                    _prev = std::make_unique<Prev<ContentT>>(unsignedData,
+                                std::forward<ContentParamTs>(contentParams)...);
+            }
+            template <typename... ContentParamTs>
+            explicit StateEvent(Type type, event_mtype_t matrixType,
+                                ContentParamTs&&... contentParams)
+                : StateEventBase(type, matrixType)
+                , _content(std::forward<ContentParamTs>(contentParams)...)
+            {
+                editJson().insert(ContentKey, _content.toJson());
+            }
+
+            const ContentT& content() const { return _content; }
+            [[deprecated("Use prevContent instead")]]
+            const ContentT* prev_content() const { return prevContent(); }
+            const ContentT* prevContent() const
+            { return _prev ? &_prev->content : nullptr; }
+            QString prevSenderId() const
+                { return _prev ? _prev->senderId : QString(); }
+
+        protected:
+            ContentT _content;
+            std::unique_ptr<Prev<ContentT>> _prev;
+    };
+} // namespace QMatrixClient