// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Compare a notecard property snapshot to this prim
// Not compiled or tested in-world
// Setup: Create a saved plain-text notecard named Data. Use name|Expected name, description|Expected description, or size|the exact LSL vector string. Touch as owner to load it; touch again to use the cached content.
// Stop / restore: Remove or disable. Reset or an inventory change discards the cache. No notecards are changed.
// Notes: At most 60 lines, 300 characters per line, and 6000 total characters; blank lines and # comments are omitted. Incomplete reads are rejected. Size comparison here is textual against LSL vector formatting, not tolerant numeric matching. Does not restore properties or change the prim.
// License: see LICENSE in this distribution.
// Original Incoprea example. MIT.
list lines;
integer lineNumber;
integer characters;
integer loaded;
key pending=NULL_KEY;
request()
{
    pending=llGetNotecardLine("Data",lineNumber);
    llSetTimerEvent(20);
}
run()
{
    integer i;
    for(i=0;i<llGetListLength(lines);++i)
    {
        list p=llParseStringKeepNulls(llList2String(lines,i),["|"],[]);
        if(llGetListLength(p)!=2)
        {
            llOwnerSay("Use field|expected.");
            return;
        }
        string name=llList2String(p,0);
        string actual;
        if(name=="name")actual=llGetObjectName();
        else if(name=="description")actual=llGetObjectDesc();
        else if(name=="size")actual=(string)llGetScale();
        else
        {
            llOwnerSay("Unsupported field: "+name);
            return;
        }
        if(actual!=llList2String(p,1))llOwnerSay(name+" differs; current="+actual);
        else llOwnerSay(name+" matches.");
    }
}
default
{
    touch_start(integer touches)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        if(pending!=NULL_KEY)
        {
            llOwnerSay("Still loading.");
            return;
        }
        if(loaded)
        {
            run();
            return;
        }
        if(llGetInventoryType("Data")!=INVENTORY_NOTECARD)
        {
            llOwnerSay("Add a saved Data notecard.");
            return;
        }
        lines=[];
        lineNumber=0;
        characters=0;
        request();
    }
    dataserver(key query,string data)
    {
        if(query!=pending || pending==NULL_KEY)return;
        if(data==EOF)
        {
            pending=NULL_KEY;
            llSetTimerEvent(0);
            loaded=TRUE;
            run();
            return;
        }
        characters+=llStringLength(data);
        if(lineNumber>=60 || llStringLength(data)>300 || characters>6000)
        {
            pending=NULL_KEY;
            llSetTimerEvent(0);
            lines=[];
            llOwnerSay("Read rejected: card exceeds bounds.");
            return;
        }
        data=llStringTrim(data,STRING_TRIM);
        if(data!="" && llGetSubString(data,0,0)!="#")lines += [data];
        ++lineNumber;
        request();
    }
    timer()
    {
        pending=NULL_KEY;
        lines=[];
        llSetTimerEvent(0);
        llOwnerSay("Read timed out; touch to retry.");
    }
    changed(integer flags)
    {
        if(flags & (CHANGED_OWNER|CHANGED_INVENTORY))llResetScript();
    }
}