From 0d4b8bacce933e34a41769b1051b25f82f922201 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Fri, 5 Feb 2021 05:18:31 +0100
Subject: Matrix: fix crash when a room is being removed in one thread and the
 room description is set in another, at the same time

---
 src/plugins/Matrix.cpp | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

(limited to 'src/plugins/Matrix.cpp')

diff --git a/src/plugins/Matrix.cpp b/src/plugins/Matrix.cpp
index ba8533b..3a2c02c 100644
--- a/src/plugins/Matrix.cpp
+++ b/src/plugins/Matrix.cpp
@@ -296,6 +296,8 @@ namespace QuickMedia {
         //message_by_event_id.clear();
         pinned_events.clear();
         tags.clear();
+        // TODO: Do this? what if its being used in another thread?
+        //body_item.reset();
     }
 
     MatrixQuickMedia::MatrixQuickMedia(Program *program, Matrix *matrix, MatrixRoomsPage *rooms_page, MatrixRoomTagsPage *room_tags_page, MatrixInvitesPage *invites_page) :
@@ -317,7 +319,7 @@ namespace QuickMedia {
         body_item->userdata = room; // Note: this has to be valid as long as the room list is valid!
         body_item->thumbnail_mask_type = ThumbnailMaskType::CIRCLE;
         body_item->thumbnail_size = sf::Vector2i(32, 32);
-        room->userdata = body_item.get();
+        room->body_item = body_item;
         rooms_page->add_body_item(body_item);
         room_body_item_by_room[room] = body_item;
     }
@@ -484,9 +486,8 @@ namespace QuickMedia {
         if(last_new_message->timestamp > read_marker_message_timestamp)
             last_unread_message = last_new_message.get();
 
-        BodyItem *room_body_item = static_cast<BodyItem*>(room->userdata);
         //assert(room_body_item);
-        if(!room_body_item)
+        if(!room->body_item)
             return;
 
         if(last_unread_message && !sync_is_cache) {
@@ -494,14 +495,14 @@ namespace QuickMedia {
             int unread_notification_count = room->unread_notification_count;
             if(unread_notification_count > 0)
                 room_desc += "\n** " + std::to_string(unread_notification_count) + " unread mention(s) **"; // TODO: Better notification?
-            room_body_item->set_description(std::move(room_desc));
-            room_body_item->set_title_color(sf::Color(255, 100, 100));
+            room->body_item->set_description(std::move(room_desc));
+            room->body_item->set_title_color(sf::Color(255, 100, 100));
             room->last_message_read = false;
 
             rooms_page->move_room_to_top(room);
             room_tags_page->move_room_to_top(room);
         } else if(is_initial_sync) {
-            room_body_item->set_description(matrix->message_get_author_displayname(last_new_message.get()) + ": " + message_to_room_description_text(last_new_message.get()));
+            room->body_item->set_description(matrix->message_get_author_displayname(last_new_message.get()) + ": " + message_to_room_description_text(last_new_message.get()));
         }
     }
 
@@ -608,8 +609,7 @@ namespace QuickMedia {
         // TODO: Optimize with hash map instead of linear search? or cache the index
         std::lock_guard<std::mutex> lock(mutex);
 #if 1
-        BodyItem *room_body_item = static_cast<BodyItem*>(room->userdata);
-        int room_body_index = body->get_index_by_body_item(room_body_item);
+        int room_body_index = body->get_index_by_body_item(room->body_item.get());
         if(room_body_index != -1) {
             std::shared_ptr<BodyItem> body_item = body->items[room_body_index];
             int body_swap_index = -1;
-- 
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