JSMinify.chai

// Ditto JavaScript Minifier - Production Grade v1.2 (Strict JS Detection)
var oldString = clip.GetAsciiString();

if (oldString.size() == 0 || oldString.size() > 500000)
{
    return false;
}

// Trim leading whitespace
var startIdx = 0;
while (startIdx < oldString.size() && 
       (oldString[startIdx] == ' ' || oldString[startIdx] == '\n' || 
        oldString[startIdx] == '\r' || oldString[startIdx] == '\t'))
{
    startIdx = startIdx + 1;
}

if (startIdx >= oldString.size())
{
    return false;
}

// STRICT: Reject if starts with { or [ (it's JSON, not JS)
var firstChar = oldString[startIdx];
if (firstChar == '{' || firstChar == '[')
{
    return false;
}

// STRICT: Must have STRONG JavaScript indicators
// These patterns don't appear in JSON
var hasFunction = oldString.find("function ") != -1 || oldString.find("function(") != -1;
var hasArrow = oldString.find("=>") != -1;
var hasDeclaration = oldString.find("const ") != -1 || oldString.find("let ") != -1 || oldString.find("var ") != -1;
var hasClass = oldString.find("class ") != -1;
var hasImport = oldString.find("import ") != -1 || oldString.find("export ") != -1;
var hasFor = oldString.find("for (") != -1 || oldString.find("for(") != -1;
var hasIf = oldString.find("if (") != -1 || oldString.find("if(") != -1;
var hasReturn = oldString.find("return ") != -1 || oldString.find("return;") != -1;

// Require at least 2 strong indicators
var jsScore = 0;
if (hasFunction) { jsScore = jsScore + 2; }
if (hasArrow) { jsScore = jsScore + 2; }
if (hasDeclaration) { jsScore = jsScore + 2; }
if (hasClass) { jsScore = jsScore + 2; }
if (hasImport) { jsScore = jsScore + 2; }
if (hasFor) { jsScore = jsScore + 1; }
if (hasIf) { jsScore = jsScore + 1; }
if (hasReturn) { jsScore = jsScore + 1; }

// Need score >= 2 to be considered JavaScript
if (jsScore < 2)
{
    return false;
}

// Already minified check
if (oldString.find("\n") == -1)
{
    return false;
}

// ... rest of minification code stays the same ...
var result = "";
var inString = false;
var stringChar = ' ';
var escapeNext = false;

for (var i = 0; i < oldString.size(); ++i)
{
    var ch = oldString[i];
    var nextCh = ' ';
    if (i + 1 < oldString.size())
    {
        nextCh = oldString[i + 1];
    }

    if (escapeNext)
    {
        result = result + ch;
        escapeNext = false;
        continue;
    }

    if (inString)
    {
        result = result + ch;
        if (ch == '\\')
        {
            escapeNext = true;
        }
        else if (ch == stringChar)
        {
            inString = false;
        }
        continue;
    }

    if (ch == '"' || ch == '\'' || ch == '`')
    {
        inString = true;
        stringChar = ch;
        result = result + ch;
        continue;
    }

    if (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r')
    {
        if (nextCh == '/' && i + 2 < oldString.size() && oldString[i + 2] == '/')
        {
            result = result + ch;
            continue;
        }
        
        if (result.size() > 0)
        {
            var lc = result[result.size() - 1];
            var needSpace = false;
            
            if ((lc >= 'a' && lc <= 'z') || (lc >= 'A' && lc <= 'Z') || 
                (lc >= '0' && lc <= '9') || lc == '_' || lc == '$')
            {
                if ((nextCh >= 'a' && nextCh <= 'z') || (nextCh >= 'A' && nextCh <= 'Z') ||
                    (nextCh >= '0' && nextCh <= '9') || nextCh == '_' || nextCh == '$')
                {
                    needSpace = true;
                }
            }
            
            if (needSpace)
            {
                result = result + ' ';
            }
        }
        continue;
    }

    if (ch == '/' && nextCh == '/')
    {
        result = result + ch;
        i = i + 1;
        while (i < oldString.size() && oldString[i] != '\n')
        {
            result = result + oldString[i];
            i = i + 1;
        }
        if (i < oldString.size())
        {
            result = result + '\n';
        }
        continue;
    }

    if (ch == '/' && nextCh == '*')
    {
        result = result + ch;
        i = i + 1;
        result = result + oldString[i];
        i = i + 1;
        while (i < oldString.size())
        {
            result = result + oldString[i];
            if (oldString[i] == '*' && i + 1 < oldString.size() && oldString[i + 1] == '/')
            {
                i = i + 1;
                result = result + oldString[i];
                break;
            }
            i = i + 1;
        }
        continue;
    }

    result = result + ch;
}

clip.SetAsciiString(result);
return false;