@rytass/file-converter-adapter-image-resizer/image-resizer.js

Rytass Utils Storages Images Resizer

import sharp from 'sharp';
import { Readable } from 'stream';

sharp.cache(false);
class ImageResizer {
    options;
    constructor(options = {
        keepAspectRatio: true,
        concurrency: 1
    }){
        if (!options.maxHeight && !options.maxWidth) throw new Error('Please provide at least one `maxWidth` or `maxHeight`');
        this.options = options;
        sharp.concurrency(this.options.concurrency ?? 1);
    }
    async convert(file) {
        let converter;
        if (file instanceof Buffer) {
            converter = sharp(file);
        } else {
            converter = sharp();
        }
        converter.resize({
            width: this.options.maxWidth,
            height: this.options.maxHeight,
            withoutEnlargement: true,
            fit: this.options.keepAspectRatio ? 'inside' : 'cover'
        });
        // Stream cannot throw when format not supported
        if (file instanceof Readable) {
            file.pipe(converter);
        }
        if (file instanceof Buffer) {
            return converter.toBuffer();
        }
        return converter;
    }
}

export { ImageResizer };