const fs = require('fs');

const baseDir = '../../src/';
const prefixPercent = true;

console.log ('Watching: ' + baseDir );
console.log();

fs.watch(baseDir, { encoding: 'utf-8' }, (eventType, filename) => {
    if (eventType === 'rename') return;
    if (filename.indexOf('.m') > -1) return;

    const mfilename = ((prefixPercent === true) ? '_' : '') + filename.slice(0,filename.search('.')-4) + '.m';

    try {
        const data = fs.readFileSync(baseDir + filename, '');
        let array = data.toString().split('\r\n');
        array.splice(0,3);
        array.splice(array.length-3,3);
        fs.writeFileSync (baseDir + mfilename ,array.join('\n'));

        console.log('Converted: ' + mfilename);

        try {
            fs.unlinkSync(baseDir + filename);
        }
        catch(err) {console.log('Error deleting file: ' + filename + '. M file was generated... Error was: ' + err)}
    }
    catch(err) {}
});