Mark rooms as direct chats

Either by accepting an invite or manually using /converttodm and revert
with /converttoroom.

src/Utils.cpp

@@ -27,6 +27,7 @@
 #include "Cache.h"
 #include "Config.h"
 #include "EventAccessors.h"
+#include "Logging.h"
 #include "MatrixClient.h"
 #include "UserSettingsPage.h"
 
@@ -813,3 +814,65 @@ utils::isReply(const mtx::events::collections::TimelineEvents &e)
 {
     return mtx::accessors::relations(e).reply_to().has_value();
 }
+
+void
+utils::removeDirectFromRoom(QString roomid)
+{
+    http::client()->get_account_data<mtx::events::account_data::Direct>(
+      [roomid](mtx::events::account_data::Direct ev, mtx::http::RequestErr e) {
+          if (e && e->status_code == 404)
+              ev = {};
+          else if (e) {
+              nhlog::net()->error("Failed to retrieve m.direct: {}", *e);
+              return;
+          }
+
+          auto r = roomid.toStdString();
+
+          for (auto it = ev.user_to_rooms.begin(); it != ev.user_to_rooms.end();) {
+              for (auto rit = it->second.begin(); rit != it->second.end();) {
+                  if (r == *rit)
+                      rit = it->second.erase(rit);
+                  else
+                      ++rit;
+              }
+
+              if (it->second.empty())
+                  it = ev.user_to_rooms.erase(it);
+              else
+                  ++it;
+          }
+
+          http::client()->put_account_data(ev, [r](mtx::http::RequestErr e) {
+              if (e)
+                  nhlog::net()->error("Failed to update m.direct: {}", *e);
+          });
+      });
+}
+void
+utils::markRoomAsDirect(QString roomid, std::vector<RoomMember> members)
+{
+    http::client()->get_account_data<mtx::events::account_data::Direct>(
+      [roomid, members](mtx::events::account_data::Direct ev, mtx::http::RequestErr e) {
+          if (e && e->status_code == 404)
+              ev = {};
+          else if (e) {
+              nhlog::net()->error("Failed to retrieve m.direct: {}", *e);
+              return;
+          }
+
+          auto local = utils::localUser();
+          auto r     = roomid.toStdString();
+
+          for (const auto &m : members) {
+              if (m.user_id != local) {
+                  ev.user_to_rooms[m.user_id.toStdString()].push_back(r);
+              }
+          }
+
+          http::client()->put_account_data(ev, [r](mtx::http::RequestErr e) {
+              if (e)
+                  nhlog::net()->error("Failed to update m.direct: {}", *e);
+          });
+      });
+}