const removeSpaces = (str) => {
    return str.replace(/^\s+|\s+$/g, "");
}

const DELIMITER = '|';

const csvJSON = (csv) => {

    let lines = csv.split("\n");

    let headers = lines[0].split(DELIMITER);

    const result = lines.slice(1).map((line) => {
        const currentline = line.split(DELIMITER);
        return headers.reduce((acc, key, index) => {
            acc[removeSpaces(key)] = removeSpaces(currentline[index]) === 'NULL' ? null : removeSpaces(currentline[index]);
            return acc;
        }, {})
    })

    //return result; //JavaScript object
    return JSON.stringify(result); //JSON
}