1 files changed, 68 insertions, 0 deletions
diff --git a/lib/events/encryptedevent.h b/lib/events/encryptedevent.h
new file mode 100644
index 00000000..0dbce25c
--- /dev/null
+++ b/lib/events/encryptedevent.h
@@ -0,0 +1,68 @@
+#pragma once
+
+#include "e2ee.h"
+#include "roomevent.h"
+
+namespace QMatrixClient
+{
+class Room;
+/*
+ * While the specification states:
+ *
+ * "This event type is used when sending encrypted events.
+ * It can be used either within a room
+ * (in which case it will have all of the Room Event fields),
+ * or as a to-device event."
+ * "The encrypted payload can contain any message event."
+ * https://matrix.org/docs/spec/client_server/latest#id493
+ *
+ * -- for most of the cases the message event is the room message event.
+ * And even for the to-device events the context is for the room.
+ *
+ * So, to simplify integration to the timeline, EncryptedEvent is a RoomEvent
+ * inheritor. Strictly speaking though, it's not always a RoomEvent, but an Event
+ * in general. It's possible, because RoomEvent interface is similar to Event's
+ * one and doesn't add new restrictions, just provides additional features.
+ */
+class EncryptedEvent : public RoomEvent
+{
+    Q_GADGET
+public:
+    DEFINE_EVENT_TYPEID("m.room.encrypted", EncryptedEvent)
+
+    /* In case with Olm, the encrypted content of the event is
+     * a map from the recipient Curve25519 identity key to ciphertext
+     * information */
+    explicit EncryptedEvent(const QJsonObject& ciphertext,
+                            const QString& senderKey);
+    /* In case with Megolm, device_id and session_id are required */
+    explicit EncryptedEvent(QByteArray ciphertext, const QString& senderKey,
+                            const QString& deviceId, const QString& sessionId);
+    explicit EncryptedEvent(const QJsonObject& obj);
+
+    QString algorithm() const
+    {
+        QString algo = content<QString>(AlgorithmKeyL);
+        if (!SupportedAlgorithms.contains(algo)) {
+            qWarning(MAIN) << "The EncryptedEvent's algorithm" << algo
+                           << "is not supported";
+        }
+        return algo;
+    }
+    QByteArray ciphertext() const
+    {
+        return content<QString>(CiphertextKeyL).toLatin1();
+    }
+    QJsonObject ciphertext(const QString& identityKey) const
+    {
+        return content<QJsonObject>(CiphertextKeyL).value(identityKey).toObject();
+    }
+    QString senderKey() const { return content<QString>(SenderKeyKeyL); }
+
+    /* device_id and session_id are required with Megolm */
+    QString deviceId() const { return content<QString>(DeviceIdKeyL); }
+    QString sessionId() const { return content<QString>(SessionIdKeyL); }
+};
+REGISTER_EVENT_TYPE(EncryptedEvent)
+
+} // namespace QMatrixClient