Event Handler

Similar to text handler, pull out the disparate array of functions which format information from an event ready for display in the UI and put in a handler class with a test suite.

requires https://github.com/quotient-im/libQuotient/pull/686

src/enums/delegatetype.h

@@ -0,0 +1,43 @@
+// SPDX-FileCopyrightText: 2023 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+#pragma once
+
+#include <QObject>
+
+/**
+ * @class DelegateType
+ *
+ * This class is designed to define the DelegateType enumeration.
+ */
+class DelegateType
+{
+    Q_GADGET
+
+public:
+    /**
+     * @brief The type of delegate that is needed for the event.
+     *
+     * @note While similar this is not the matrix event or message type. This is
+     *       to tell a QML ListView what delegate to show for each event. So while
+     *       similar to the spec it is not the same.
+     */
+    enum Type {
+        Emote, /**< A message that begins with /me. */
+        Notice, /**< A notice event. */
+        Image, /**< A message that is an image. */
+        Audio, /**< A message that is an audio recording. */
+        Video, /**< A message that is a video. */
+        File, /**< A message that is a file. */
+        Message, /**< A text message. */
+        Sticker, /**< A message that is a sticker. */
+        State, /**< A state event in the room. */
+        Encrypted, /**< An encrypted message that cannot be decrypted. */
+        ReadMarker, /**< The local user read marker. */
+        Poll, /**< The initial event for a poll. */
+        Location, /**< A location event. */
+        LiveLocation, /**< The initial event of a shared live location (i.e., the place where this is supposed to be shown in the timeline). */
+        Other, /**< Anything that cannot be classified as another type. */
+    };
+    Q_ENUM(Type);
+};