Read group avatar metadata separately from image bytes

src/chat/group_avatar.c

@@ -173,7 +173,7 @@ static int ga_allowed(struct UTUN_INSTANCE* inst, uint64_t group, uint64_t peer)
     if (!member_files_member(inst, group, inst->node_id, 0) || !member_files_member(inst, group, peer, 0)) return 0;
     struct TOPO_GROUP* g = topo_groups_find(inst->topo_groups, group);
     for (struct ll_entry* e = g && g->senders_list ? g->senders_list->head : NULL; e; e = e->next) {
-        struct TOPO_GROUP_CONN_ITEM* item = e->data;
+        struct TOPO_GROUP_CONN_ITEM* item = (struct TOPO_GROUP_CONN_ITEM*)e->data;
         if (item && item->node_id == peer && item->conn && item->ready_notified && !item->transport_down) return 1;
     }
     return 0;
@@ -340,9 +340,9 @@ static void ga_tick(void* arg) {
     for (struct ga_peer* p = ctx->peers; p; p = p->next) p->seen = 0;
     for (struct ll_entry* ge = ctx->inst->topo_groups->group_list->head; ge; ge = ge->next) {
         struct TOPO_GROUP* group = (struct TOPO_GROUP*)ge;
-        if (group->group_type != TOPO_GROUP_TYPE_CHAT) continue;
+        if (group->group_type != TOPO_GROUP_TYPE_CHAT || !group->senders_list) continue;
         for (struct ll_entry* e = group->senders_list->head; e; e = e->next) {
-            struct TOPO_GROUP_CONN_ITEM* item = e->data;
+            struct TOPO_GROUP_CONN_ITEM* item = (struct TOPO_GROUP_CONN_ITEM*)e->data;
             if (!item || !item->conn || !item->ready_notified || item->transport_down || !ga_allowed(ctx->inst, group->group_id, item->node_id)) continue;
             struct ga_peer* p = ga_find(ctx, group->group_id, item->node_id, 1); if (!p) continue;
             p->seen = 1;

tools/chatgui/db/db_manager.cpp

@@ -113,7 +113,7 @@ QList<ChannelRow> DbManager::getChannels(ChannelSortMode sort) const {
     char sql[512]; snprintf(sql, sizeof(sql),
         "SELECT channel_id, name, owner_node_id,"
         " x25519_pubkey, x25519_privkey, ed25519_pubkey, ed25519_privkey, signature,"
-        " last_read_msg_id, last_pos_msg_id, last_msg_at, created_at"
+        " last_read_msg_id, last_pos_msg_id, last_msg_at, created_at,avatar_version,avatar_hash"
         " FROM channels%s", orderBy);
     sqlite3_stmt* stmt = prepareOrNull(sql);
     if (!stmt) return list;
@@ -131,6 +131,8 @@ QList<ChannelRow> DbManager::getChannels(ChannelSortMode sort) const {
         r.lastPosMsgId    = sqlite3_column_int64(stmt, 9);
         r.lastMsgAt       = sqlite3_column_int64(stmt, 10);
         r.createdAt       = sqlite3_column_int64(stmt, 11);
+        r.avatarVersion   = (quint64)sqlite3_column_int64(stmt, 12);
+        r.avatarHash      = colBlob(stmt, 13);
         list.append(r);
     }
     sqlite3_finalize(stmt);
@@ -144,6 +146,16 @@ QList<ChannelRow> DbManager::getChannels(ChannelSortMode sort) const {
     return list;
 }
 
+QByteArray DbManager::getChannelAvatar(const QString& channelId) const {
+    sqlite3_stmt* st = prepareOrNull("SELECT avatar_data FROM channels WHERE channel_id=?"); if (!st) return {};
+    const QByteArray id = channelId.toLatin1(); sqlite3_bind_text(st, 1, id.constData(), id.size(), SQLITE_TRANSIENT);
+    QByteArray bytes;
+    int rc = sqlite3_step(st);
+    if (rc == SQLITE_ROW) bytes = colBlob(st, 0);
+    else if (rc != SQLITE_DONE) GUI_ERROR("group avatar: database read failed channel=%s rc=%d", qPrintable(channelId), rc);
+    sqlite3_finalize(st); return bytes;
+}
+
 bool DbManager::isChannelMember(const QString& chId, quint64 nodeId) const {
     const QByteArray sql = QStringLiteral("SELECT 1 FROM \"%1\" WHERE node_id=?").arg(peersTableName(chId)).toUtf8();
     sqlite3_stmt* statement = prepareOrNull(sql.constData());

tools/chatgui/db/db_manager.h

@@ -29,6 +29,8 @@ struct ChannelRow {
     qint64     lastMsgAt = 0;
     qint64     createdAt = 0;
     int        unreadCount = 0;
+    quint64    avatarVersion = 0;
+    QByteArray avatarHash;
 };
 
 struct MessageRow {
@@ -95,6 +97,7 @@ public:
 
     /* ── Каналы ── */
     QList<ChannelRow> getChannels(ChannelSortMode sort = ChannelSortMode::Alphabetical) const;
+    QByteArray getChannelAvatar(const QString& channelId) const;
     QString getChannelLastMessage(const QString& channelId) const;
     int  getUnreadCount(const QString& channelId, qint64 lastReadMsgId) const;