regenerateThumbnails.js

const path = require('path');
const config = require('../config.js');
const fs = require('fs');
const sharp = require('sharp');
const ffmpeg = require('fluent-ffmpeg');

const utilsController = {};
utilsController.videoExtensions = ['.webm', '.mp4', '.wmv', '.avi', '.mov'];

utilsController.generateThumbs = function(file, basedomain) {
	if (config.uploads.generateThumbnails !== true) return;
	const ext = path.extname(file).toLowerCase();
	// had to remove the .name property from everywhere it was called, cba to figure out why

	let thumbname = path.join(__dirname, '..', config.uploads.folder, 'thumbs', file.slice(0, -ext.length) + '.png');
	fs.access(thumbname, err => {
		if (err && err.code === 'ENOENT') {
			if (utilsController.videoExtensions.includes(ext)) {
				ffmpeg(path.join(__dirname, '..', config.uploads.folder, file))
					.thumbnail({
						timestamps: [0],
						filename: '%b.png',
						folder: path.join(__dirname, '..', config.uploads.folder, 'thumbs'),
						size: '200x?'
					})
					.on('error', error => console.log('Error - ', error.message));
			} else {
				let resizeOptions = {
					width: 200,
					height: 200,
					fit: 'contain',
					background: {
						r: 0,
						g: 0,
						b: 0,
						alpha: 0
					}
				};

				sharp(path.join(__dirname, '..', config.uploads.folder, file))
					.resize(resizeOptions)
					.toFile(thumbname)
					.catch((error) => {
						if (error) {
							console.log('Error - ', error);
						}
					});
			}
		}
	});
};

fs.readdir(path.join(__dirname, '..', config.uploads.folder), (err, files) => {
	if (err) console.log("Unable to get images: " + err);

	files.forEach((file) => {
		utilsController.generateThumbs(file);
	})
});