rename-multiple-files-from-json.js

// Custom code to rename files. 

/* 1. Create Lesson.json
   { "01-01" : "01. Title" }
*/

/* 2. Make sure the file names are in "01-01.mp4" format*/

const fs = require('fs');
fs.readFile('lesson.json', function(error, data) {
    if (error) {
        console.log(error);
        return;
    }

    var obj = JSON.parse(data);
    for(var p in obj) {
        fs.rename(p + '.mp4', obj[p] + '.mp4', function(err) {
            if ( err ) console.log('ERROR: ' + err);
        });
    }
});