@uploadcare/file-uploader/utils/parseShrink.js

Building blocks for Uploadcare products integration

/** TODO parseShrink move to package @uploadcare/image-shrink */

const MAX_SQUARE_SIDE = 16384;

const regExpShrink = /^([0-9]+)x([0-9]+)(?:\s+(\d{1,2}|100)%)?$/i;

/**
 * @param value
 * @returns {{ size: number; quality: number | undefined }}
 */
export const parseShrink = (value) => {
  const terms = regExpShrink.exec(value?.toLocaleLowerCase()) || [];

  if (!terms.length) {
    return false;
  }

  const sizeShrink = terms[1] * terms[2];
  const maxSize = MAX_SQUARE_SIDE * MAX_SQUARE_SIDE;

  if (sizeShrink > maxSize) {
    console.warn(
      `Shrinked size can not be larger than ${Math.floor(maxSize / 1000 / 1000)}MP. ` +
        `You have set ${terms[1]}x${terms[2]} (` +
        `${Math.ceil(sizeShrink / 1000 / 100) / 10}MP).`,
    );
    return false;
  }

  return {
    quality: terms[3] ? terms[3] / 100 : undefined,
    size: sizeShrink,
  };
};