// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Audit non-overlapping subtitle cues
// Not compiled or tested in-world
// Setup: Add a saved plain-text notecard named Config. Use decimal seconds from zero, for example 0|4.5|Welcome. Touch as owner; reset to scan again.
// Stop / restore: Remove or disable. This auditor never changes object settings or inventory.
// Notes: Reads at most 40 short lines, skips blanks and # comments, and times out each asynchronous request after 20 seconds. No sound plays and no captions are displayed. Adjacent cues may touch at an endpoint; negative, inverted, or overlapping times are findings.
// License: see LICENSE in this distribution.
// Original Incoprea example. MIT.
integer decimalOK(string value)
{
    integer n=llStringLength(value);
    if(n<1 || n>12)return FALSE;
    integer i;
    integer digits;
    integer dots;
    if(llGetSubString(value,0,0)=="-" || llGetSubString(value,0,0)=="+")i=1;
    for(;i<n;++i)
    {
        string c=llGetSubString(value,i,i);
        if(c==".")++dots;
        else if(llSubStringIndex("0123456789",c)!=-1)++digits;
        else return FALSE;
    }
    return digits>0 && dots<=1;
}
float previousEnd;
key pending=NULL_KEY;
integer lineNumber;
integer scannedRows;
integer issues;
integer finished;
issue(string text)
{
    ++issues;
    llOwnerSay("Line "+(string)(lineNumber+1)+": "+text);
}
requestLine()
{
    pending=llGetNotecardLine("Config",lineNumber);
    llSetTimerEvent(20);
}
finish()
{
    pending=NULL_KEY;
    finished=TRUE;
    llSetTimerEvent(0);
    llOwnerSay("Audited rows: "+(string)scannedRows+"; findings: "+(string)issues);
}
check(string data)
{
    list p=llParseStringKeepNulls(data,["|"],[]);
    if(llGetListLength(p)!=3 || !decimalOK(llList2String(p,0)) || !decimalOK(llList2String(p,1)))
    {
        issue("Expected start|end|text.");
        return;
    }
    float start=llList2Float(p,0);
    float end=llList2Float(p,1);
    if(start<0 || end<=start || end>86400)
    {
        issue("Invalid cue interval.");
        return;
    }
    if(start<previousEnd)issue("Overlaps or precedes the prior accepted cue.");
    if(llList2String(p,2)=="")issue("Empty caption.");
    previousEnd=end;
}
default
{
    touch_start(integer touches)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        if(pending!=NULL_KEY || finished)
        {
            llOwnerSay("Reset before starting another audit.");
            return;
        }
        if(llGetInventoryType("Config")!=INVENTORY_NOTECARD)
        {
            llOwnerSay("Add a saved Config notecard.");
            return;
        }
        requestLine();
    }
    dataserver(key query,string data)
    {
        if(query!=pending || pending==NULL_KEY)return;
        if(data==EOF)
        {
            finish();
            return;
        }
        data=llStringTrim(data,STRING_TRIM);
        if(data!="" && llGetSubString(data,0,0)!="#")
        {
            ++scannedRows;
            check(data);
        }
        ++lineNumber;
        if(lineNumber>=40)
        {
            llOwnerSay("40-line cap reached; report may be partial.");
            finish();
            return;
        }
        requestLine();
    }
    timer()
    {
        pending=NULL_KEY;
        finished=TRUE;
        llSetTimerEvent(0);
        llOwnerSay("Audit timed out; partial checks only. Reset to retry.");
    }
    changed(integer flags)
    {
        if(flags & (CHANGED_OWNER|CHANGED_INVENTORY))llResetScript();
    }
}