// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Resolve a filename using the longest suffix rule
// Not compiled or tested in-world
// Setup: Create a saved plain-text notecard named Data. Use suffix|handlerLabel rows, for example .tar.gz|archive and .gz|compressed. Edit FILENAME. 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. Case-insensitive suffix matching. Equal-length conflicting matches are rejected. The result is a label only and never launches or opens files.
// License: see LICENSE in this distribution.
// Original Incoprea example. MIT.
string FILENAME="library.tar.gz";
list lines;
integer lineNumber;
integer characters;
integer loaded;
key pending=NULL_KEY;
request()
{
    pending=llGetNotecardLine("Data",lineNumber);
    llSetTimerEvent(20);
}
run()
{
    string file=llToLower(FILENAME);
    integer best=-1;
    string result;
    integer i;
    for(i=0;i<llGetListLength(lines);++i)
    {
        list p=llParseStringKeepNulls(llList2String(lines,i),["|"],[]);
        string suffix=llToLower(llList2String(p,0));
        integer length=llStringLength(suffix);
        if(llGetListLength(p)!=2 || length==0)
        {
            llOwnerSay("Malformed suffix rule.");
            return;
        }
        if(length<=llStringLength(file) && llGetSubString(file,-length,-1)==suffix)
        {
            string label=llList2String(p,1);
            if(length==best && result!=label)
            {
                llOwnerSay("Conflicting suffix rules.");
                return;
            }
            if(length>best)
            {
                best=length;
                result=label;
            }
        }
    }
    if(best==-1)llOwnerSay("No suffix rule.");
    else llOwnerSay("Route label: "+result);
}
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();
    }
}