next-image-export-optimizer/dist/utils/urlToFilename.js

Optimizes all static images for Next.js static HTML export functionality

"use strict";
module.exports = function urlToFilename(url) {
    try {
        const parsedUrl = new URL(url);
        const extension = parsedUrl.pathname.split(".").pop();
        if (extension) {
            return hashAlgorithm(url).toString().concat(".", extension);
        }
        return hashAlgorithm(url).toString();
    }
    catch (error) {
        console.error("Error parsing URL", url, error);
    }
};
// Credits to https://github.com/bryc/code/blob/master/jshash/experimental/cyrb53.js
// This is a hash function that is used to generate a hash from the image URL
const hashAlgorithm = (str, seed = 0) => {
    let h1 = 0xdeadbeef ^ seed, h2 = 0x41c6ce57 ^ seed;
    for (let i = 0, ch; i < str.length; i++) {
        ch = str.charCodeAt(i);
        h1 = Math.imul(h1 ^ ch, 2654435761);
        h2 = Math.imul(h2 ^ ch, 1597334677);
    }
    h1 = Math.imul(h1 ^ (h1 >>> 16), 2246822507);
    h1 ^= Math.imul(h2 ^ (h2 >>> 13), 3266489909);
    h2 = Math.imul(h2 ^ (h2 >>> 16), 2246822507);
    h2 ^= Math.imul(h1 ^ (h1 >>> 13), 3266489909);
    return 4294967296 * (2097151 & h2) + (h1 >>> 0);
};