// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Morse letter decoder
// Not compiled or tested in-world
// Setup: Owner-touch and enter one group such as .- or --..
// Stop / restore: Stop responding and the listener closes after 90 seconds, or remove/disable the script. Owner-touch restarts the exercise.
// Notes: Owner-only local exercise; no prizes, visitor records, network service, or persistent scores. A–Z lookup only; punctuation, procedural signals and numbers are intentionally excluded.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Not compiled or tested in-world.
integer channel;
integer handle;
close()
{
    if(handle)llListenRemove(handle);
    handle=0;
    llSetTimerEvent(0.0);
}
ask(string prompt)
{
    if(!handle)
    {
        channel=-1000-(integer)llFrand(1000000.0);
        handle=llListen(channel,"",llGetOwner(),"");
    }
    llTextBox(llGetOwner(),prompt,channel);
    llSetTimerEvent(90.0);
}
list codes=[".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."];
start()
{
    ask("Enter one Morse letter using . and - (for example .-).");
}
answer(string s)
{
    integer p=llListFindList(codes,[s]);
    if(p<0)
    {
        ask("Not an A-Z Morse letter. Try one group without spaces.");
        return;
    }
    close();
    llOwnerSay(s+" = "+llGetSubString("ABCDEFGHIJKLMNOPQRSTUVWXYZ",p,p));
}
default
{
    touch_start(integer count)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        close();
        start();
    }
    listen(integer ch,string name,key id,string message)
    {
        if(!handle||ch!=channel||id!=llGetOwner())return;
        answer(llStringTrim(message,STRING_TRIM));
    }
    timer()
    {
        close();
        llOwnerSay("Exercise paused. Touch to restart.");
    }
    changed(integer change)
    {
        if(change&CHANGED_OWNER)llResetScript();
    }
}