prevent player from joining game if a quest they don't have access to is in progress

src/Lobby.cc

@@ -404,25 +404,9 @@ unordered_map<uint32_t, shared_ptr<Client>> Lobby::clients_by_serial_number() co
 
 QuestIndex::IncludeCondition Lobby::quest_include_condition() const {
   return [this](shared_ptr<const Quest> q) -> bool {
-    if (q->require_flag >= 0) {
-      for (const auto& lc : this->clients) {
-        if (lc && !lc->game_data.character()->quest_flags.get(this->difficulty, q->require_flag)) {
-          return false;
-        }
-      }
-    }
-    if (!q->require_team_reward_key.empty()) {
-      // TODO: Technically we should check that all clients are on the SAME
-      // team, but I'm lazy (for now), so we allow clients on different teams
-      // to access the quest as long as all their teams have the quest reward.
-      for (const auto& lc : this->clients) {
-        if (!lc) {
-          continue;
-        }
-        auto team = lc->team();
-        if (!team || !team->has_reward(q->require_team_reward_key)) {
-          return false;
-        }
+    for (const auto& lc : this->clients) {
+      if (lc && !lc->can_access_quest(q, this->difficulty)) {
+        return false;
       }
     }
     return true;