Add button to thread to reply

![image](/uploads/bf2b6857f797480b429db02c5d01a4f7/image.png){width=254 height=147}

src/models/messagecontentmodel.cpp

@@ -405,6 +405,7 @@ QHash<int, QByteArray> MessageContentModel::roleNames() const
     roles[ReplyEventIdRole] = "replyEventId";
     roles[ReplyAuthorRole] = "replyAuthor";
     roles[ReplyContentModelRole] = "replyContentModel";
+    roles[ThreadRootRole] = "threadRoot";
     roles[LinkPreviewerRole] = "linkPreviewer";
     roles[ChatBarCacheRole] = "chatBarCache";
     return roles;

src/models/messagecontentmodel.h

@@ -62,6 +62,8 @@ public:
         ReplyAuthorRole, /**< The author of the event that was replied to. */
         ReplyContentModelRole, /**< The MessageContentModel for the reply event. */
 
+        ThreadRootRole, /**< The thread root event ID for the event. */
+
         LinkPreviewerRole, /**< The link preview details. */
         ChatBarCacheRole, /**< The ChatBarCache to use. */
     };

src/models/threadmodel.cpp

@@ -178,8 +178,14 @@ QVariant ThreadChatBarModel::data(const QModelIndex &idx, int role) const
         return {};
     }
 
+    const auto threadModel = dynamic_cast<ThreadModel *>(parent());
+    if (threadModel == nullptr) {
+        qWarning() << "ThreadChatBarModel created with incorrect parent, a ThreadModel must be set as the parent on creation.";
+        return {};
+    }
+
     if (role == ComponentTypeRole) {
-        return MessageComponentType::ChatBar;
+        return m_room->threadCache()->threadId() == threadModel->threadRootId() ? MessageComponentType::ChatBar : MessageComponentType::ReplyButton;
     }
     if (role == ChatBarCacheRole) {
         if (m_room == nullptr) {
@@ -187,20 +193,16 @@ QVariant ThreadChatBarModel::data(const QModelIndex &idx, int role) const
         }
         return QVariant::fromValue<ChatBarCache *>(m_room->threadCache());
     }
+    if (role == ThreadRootRole) {
+        return threadModel->threadRootId();
+    }
     return {};
 }
 
 int ThreadChatBarModel::rowCount(const QModelIndex &parent) const
 {
     Q_UNUSED(parent)
-    if (m_room == nullptr) {
-        return 0;
-    }
-    const auto threadModel = dynamic_cast<ThreadModel *>(this->parent());
-    if (threadModel != nullptr) {
-        return m_room->threadCache()->threadId() == threadModel->threadRootId() ? 1 : 0;
-    }
-    return 0;
+    return 1;
 }
 
 QHash<int, QByteArray> ThreadChatBarModel::roleNames() const
@@ -208,6 +210,7 @@ QHash<int, QByteArray> ThreadChatBarModel::roleNames() const
     return {
         {ComponentTypeRole, "componentType"},
         {ChatBarCacheRole, "chatBarCache"},
+        {ThreadRootRole, "threadRoot"},
     };
 }
 

src/models/threadmodel.h

@@ -41,6 +41,7 @@ public:
     enum Roles {
         ComponentTypeRole = MessageContentModel::ComponentTypeRole, /**< The type of component to visualise the message. */
         ChatBarCacheRole = MessageContentModel::ChatBarCacheRole, /**< The ChatBarCache to use. */
+        ThreadRootRole = MessageContentModel::ThreadRootRole, /**< The thread root event ID for the thread. */
     };
     Q_ENUM(Roles)