smart-filename/src/truncateFilename.js

NPM package designed for handling filenames safely and effectively. It provides utilities to format, sanitize, validate, truncate, and extract file extensions while ensuring compatibility across different operating systems. This package is particularly us

function truncateFilename(filename, maxLength = 50) {
    if (typeof filename !== 'string' || filename.length <= maxLength) return filename;

    const parts = filename.split('.');
    if (parts.length < 2) return filename.slice(0, maxLength); // No extension case

    const ext = parts.pop(); // Extract extension
    let name = parts.join('.'); // Remaining name part

    if (name.length > maxLength - ext.length - 1) {
        name = name.slice(0, maxLength - ext.length - 1);
    }

    return `${name}.${ext}`;
}

module.exports = truncateFilename;