const fs = require('fs');
const path = require('path');
const VIDEO_DIR = "videos";
const DESCRIPTION_FILE = "description.json";
const INDEX_FILE = "index.json";

function isDirectory(path) {
    return fs.lstatSync(path).isDirectory();
}

let info = [];

for (let dir of fs.readdirSync(VIDEO_DIR)) {
    if (!isDirectory(path.join(VIDEO_DIR, dir))) {
        continue;
    }

    let description = JSON.parse(fs.readFileSync(path.join(VIDEO_DIR, dir, DESCRIPTION_FILE)));
    description.url = dir + "/";
    description.videos = [];

    for (let subdir of fs.readdirSync(path.join(VIDEO_DIR, dir))) {
        if (!isDirectory(path.join(VIDEO_DIR, dir, subdir))) {
            continue;
        }

        let subdescription = JSON.parse(fs.readFileSync(path.join(VIDEO_DIR, dir, subdir, DESCRIPTION_FILE)));
        subdescription.url = subdir + "/";

        description.videos.push(subdescription);
    }

    info.push(description);
}

fs.writeFileSync(path.join(VIDEO_DIR, INDEX_FILE), JSON.stringify(info));