Remove map from room_id to QPixmap from ChatPage

The avatars are loaded from cache

include/Cache.h

@@ -166,6 +166,9 @@ public:
         bool isFormatValid();
         void setCurrentFormat();
 
+        //! Retrieves the saved room avatar.
+        QImage getRoomAvatar(const QString &id);
+
         //! Adds a user to the read list for the given event.
         //!
         //! There should be only one user id present in a receipt list per room.

include/ChatPage.h

@@ -168,9 +168,6 @@ private:
         QString current_room_;
         QString current_community_;
 
-        std::map<QString, QPixmap> roomAvatars_;
-        std::map<QString, QPixmap> community_avatars_;
-
         UserInfoWidget *user_info_widget_;
 
         std::map<QString, QSharedPointer<Community>> communities_;

src/Cache.cc

@@ -859,6 +859,43 @@ Cache::getInviteRoomTopic(lmdb::txn &txn, lmdb::dbi &db)
         return QString();
 }
 
+QImage
+Cache::getRoomAvatar(const QString &room_id)
+{
+        auto txn = lmdb::txn::begin(env_, nullptr, MDB_RDONLY);
+
+        lmdb::val response;
+
+        if (!lmdb::dbi_get(txn, roomsDb_, lmdb::val(room_id.toStdString()), response)) {
+                txn.commit();
+                return QImage();
+        }
+
+        std::string media_url;
+
+        try {
+                RoomInfo info = json::parse(std::string(response.data(), response.size()));
+                media_url     = std::move(info.avatar_url);
+
+                if (media_url.empty()) {
+                        txn.commit();
+                        return QImage();
+                }
+        } catch (const json::exception &e) {
+                qWarning() << "failed to parse room info" << e.what()
+                           << QString::fromStdString(std::string(response.data(), response.size()));
+        }
+
+        if (!lmdb::dbi_get(txn, mediaDb_, lmdb::val(media_url), response)) {
+                txn.commit();
+                return QImage();
+        }
+
+        txn.commit();
+
+        return QImage::fromData(QByteArray(response.data(), response.size()));
+}
+
 std::vector<std::string>
 Cache::joinedRooms()
 {

src/ChatPage.cc

@@ -459,7 +459,6 @@ ChatPage::logout()
 void
 ChatPage::resetUI()
 {
-        roomAvatars_.clear();
         room_list_->clear();
         top_bar_->reset();
         user_info_widget_->reset();
@@ -571,8 +570,6 @@ ChatPage::initialSyncCompleted(const mtx::responses::Sync &response)
 void
 ChatPage::updateTopBarAvatar(const QString &roomid, const QPixmap &img)
 {
-        roomAvatars_.emplace(roomid, img);
-
         if (current_room_ != roomid)
                 return;
 
@@ -646,15 +643,18 @@ ChatPage::changeTopRoomInfo(const QString &room_id)
                 top_bar_->updateRoomName(name);
                 top_bar_->updateRoomTopic(QString::fromStdString(room_info[room_id].topic));
 
-                if (roomAvatars_.find(room_id) != roomAvatars_.end())
-                        top_bar_->updateRoomAvatar(roomAvatars_[room_id].toImage());
-                else
+                auto img = cache_->getRoomAvatar(room_id);
+
+                if (img.isNull())
                         top_bar_->updateRoomAvatarFromName(name);
+                else
+                        top_bar_->updateRoomAvatar(img);
 
-                current_room_ = room_id;
         } catch (const lmdb::error &e) {
                 qWarning() << "failed to change top bar room info" << e.what();
         }
+
+        current_room_ = room_id;
 }
 
 void