Roz's Thunderdome Gift Box (IT WILL DELETE STUFF)

//Roz's Thunderdome Gift Box

//DON'T USE THIS TO RESELL NO-TRANSFER ITEMS
//THIS ITEM IS NOT FOR GACHA RESELLERS, IT
//WILL DELETE ITEMS FROM THE PRIM INVENTORY
//ONCE IT IS REZZED. THIS IS ONLY FOR FULL
//PERM/COPY&TRANS ITEMS YOU HAVE MADE, HAVE
//SET PERMISSIONS FOR, OR CAN SAFELY KEEP
//BACKUPS OF IN YOUR INVENTORY!

//IT WILL DELETE ITEMS IN THE PRIM INVENTORY!

//Make sure the script is in the box FIRST!
//Then place your promotional "gacha" items
//inside (along with any promotional textures,
//landmarks, or non-object items).  Once the
//box is rezzed, an item is selected at random
//and all other objects are deleted from the
//box's inventory.

//You can set the box for "sale" inworld (as
//long as you don't take it inventory), or
//you can take the box into inventory and send
//it to others, or give it away as a promo
//item for others to rez.  If you accidentally
//"wear" the box while it's in your inventory,
//you'll have to create a new one.

//This script can be thwarted in a no-script
//rez area.  Use for promo items, not for
//gacha event type items.

default
{
    on_rez(integer start_param)
    {
        string pickOne;
        string rollCall;
        integer howMany;
        integer index;
        howMany = llGetInventoryNumber(INVENTORY_OBJECT);
        pickOne = llGetInventoryName(INVENTORY_OBJECT, (integer)llFrand(howMany));
        for (index=(howMany-1);index>=0;index--)
        {
            rollCall = llGetInventoryName(INVENTORY_OBJECT,index);
            if (rollCall != pickOne)llRemoveInventory(rollCall);
            //THIS DELETES ALL OBJECTS EXCEPT ONE RANDOM OBJECT!
            //Landmarks, textures, and system layer clothing are
            //still safe, though.
        }
        llSetObjectName(pickOne + " (BOXED)" );
        llOwnerSay("This script can be thwarted by opening your box in a no-script parcel");
        llOwnerSay("But I'll bet you already knew that!");
        llRemoveInventory(llGetScriptName()); //Script self deletes.
    }
}