[Endzeit]

thanks suicidalkatt & elcius.

While your method would be ideal, it doesn't really do what the author intended. I believe they want to have the tooltip show every set that contains a particular itemID not just the first one that returns true.

1 set = 1 itemid. Both variants are correct for me. ItemId 123456 can not be in 2 Sets in my table.

function AddLootMsg(self, event, message, ...)
     if not string.match(message,'Hbattlepet') then
    local lootid = select(3, string.find(message, "item:(%d+):"))
    
    local itemName,itemLink = GetItemInfo(lootid);
    if not itemLink then return end
    
    
    local itemId = tonumber(itemLink:match('item:(%d+)'));
    
    if itemSet[itemId] then -- if a set is found
        for i, setIndex in pairs(itemSet[itemId]) do -- for each index the id has
        message = message:gsub("\124r.", "\124r (|cff9400D3Transmog Set: " .. setName[setIndex]['name'] .. "|cff00aa00).")
        return false, message, ...
 
    end
end
end
end
 
ChatFrame_AddMessageEventFilter("CHAT_MSG_LOOT", AddLootMsg);

thats my code for chat_msg_loot so far.. in my first tests it works.. have someone also an improvement for this code?