@sketch-hq/sketch-assistant-utils/dist/esm/get-image-metadata/index.js

Utility functions and types for Sketch Assistants.

import NodeStreamZip from 'node-stream-zip';
import probeImageSize from 'probe-image-size';
/**
 * Efficiently access image metadata from a zipped Sketch document. Streams
 * the image from the zip, and returns as soon as the image dimensions are
 * parsed from the header chunks.
 */
const getImageMetadata = (ref, filepath) => new Promise((resolve, reject) => {
    const zip = new NodeStreamZip({ file: filepath, storeEntries: true });
    zip.on('error', (error) => reject(error));
    zip.on('ready', () => {
        zip.stream(ref, (error, stream) => {
            if (!stream)
                return reject();
            stream.on('end', () => zip.close());
            if (error) {
                reject(error);
            }
            else {
                probeImageSize(stream)
                    .then((result) => {
                    // @ts-ignore
                    if ('destroy' in stream)
                        stream.destroy();
                    resolve({
                        width: result.width,
                        height: result.height,
                        ref,
                    });
                })
                    .catch((error) => reject(error));
            }
        });
    });
});
export { getImageMetadata };