const realpath = require('fs/promises').realpath;
const stat = require('fs/promises').stat;

function fileExists(file) {
    return new Promise((resolve, reject) => {
        if (file == undefined) {
            reject('can not check the existence of an undefined file');
        }
        resolvePath(file)
            .then((path) => {
                stat(path)
                    .then((stats) => {
                        resolve({path, stats});
                    })
            })
            .catch(reject);
    });
}

function resolvePath(file) {
    return new Promise((resolve, reject) => {
        if (file == undefined) {
            reject('can not resolve a path to an undefined file');
        }
        realpath(file)
            .then(resolve)
            .catch((err) => {
                reject('resolving path \'' + file + '\' encountered an error >>> ' + err);
            });
    });
}

module.exports = {
    fileExists,
    resolvePath
}