prepare json file to configure slideshow from all the png in a folder

pnd2slides.js

var fs = require('fs');
 
// command usage validation
if (process.argv.length <= 3) {
    console.log("Usage: " + __filename + " path/to/directory path/to/output");
    process.exit(-1);
}

var path   = process.argv[2];
var output = process.argv[3];
var panels = {
    list: []
 };
 
fs.readdir(path, function(err, items) {
    // list all file in folder
    for (var i=0; i<items.length; i++) {
        console.log(items[i])
        panels.list.push({ name: items[i] })
    }
    // create json
    var json = JSON.stringify(panels, null, 4);
    // print json to output
    fs.writeFile(output, json, (err) => {
        if (err) throw err;
    });
});