Support for receiving m.reaction events

* struct EventRelation; class ReactionEvent; Room::relatedEvents()
* Reaction events are processed in both history and sync batches
* Redacting a reaction removes it from the list of related events
* QMCTest::sendReaction()

1 files changed, 78 insertions, 0 deletions

diff --git a/lib/events/reactionevent.h b/lib/events/reactionevent.h
new file mode 100644
index 00000000..9a6adbbd
--- /dev/null
+++ b/lib/events/reactionevent.h
@@ -0,0 +1,78 @@
+/******************************************************************************
+ * Copyright (C) 2019 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 {
+
+struct EventRelation
+{
+    using reltypeid_t = const char*;
+    static constexpr reltypeid_t Reply() { return "m.in_reply_to"; }
+    static constexpr reltypeid_t Annotation() { return "m.annotation"; }
+    static constexpr reltypeid_t Replacement() { return "m.replace"; }
+
+    QString type;
+    QString eventId;
+    QString key = {}; // Only used for m.annotation for now
+
+    static EventRelation replyTo(QString eventId)
+    {
+        return { Reply(), std::move(eventId) };
+    }
+    static EventRelation annotate(QString eventId, QString key)
+    {
+        return { Annotation(), std::move(eventId), std::move(key) };
+    }
+    static EventRelation replace(QString eventId)
+    {
+        return { Replacement(), std::move(eventId) };
+    }
+};
+template <>
+struct JsonObjectConverter<EventRelation>
+{
+    static void dumpTo(QJsonObject& jo, const EventRelation& pod);
+    static void fillFrom(const QJsonObject& jo, EventRelation& pod);
+};
+
+class ReactionEvent : public RoomEvent
+{
+public:
+    DEFINE_EVENT_TYPEID("m.reaction", ReactionEvent)
+
+    explicit ReactionEvent(const EventRelation& value)
+        : RoomEvent(typeId(), matrixTypeId(),
+                    { { QStringLiteral("m.relates_to"), toJson(value) } })
+    {}
+    explicit ReactionEvent(const QJsonObject& obj)
+        : RoomEvent(typeId(), obj)
+    {}
+    EventRelation relation() const
+    {
+        return content<EventRelation>(QStringLiteral("m.relates_to"));
+    }
+
+private:
+    EventRelation _relation;
+};
+REGISTER_EVENT_TYPE(ReactionEvent)
+
+} // namespace QMatrixClient