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

Rytass Utils Storages Images Watermark

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

sharp.cache(false);
class ImageWatermark {
    options;
    constructor(options){
        this.options = options;
        sharp.concurrency(options.concurrency ?? 1);
    }
    async convert(file) {
        let converter;
        if (file instanceof Buffer) {
            converter = sharp(file);
        } else {
            converter = sharp();
        }
        converter.composite(this.options.watermarks.map((watermark)=>({
                input: watermark.image,
                gravity: watermark.gravity || gravity.southeast
            })));
        // Stream cannot throw when format not supported
        if (file instanceof Readable) {
            file.pipe(converter);
        }
        if (file instanceof Buffer) {
            return converter.toBuffer();
        }
        return converter;
    }
}

export { ImageWatermark };