rehype-image-optim/dist/lib/index.js

rehype plugin to change the `src` (and `srcset`/`sizes`) of images to optimized versions from your image CDN/optimization provider

/* eslint-disable @typescript-eslint/no-explicit-any */
import { visit } from "unist-util-visit";
import transformers from "./link-transformer/index.js";
function transformer(originalLink, provider, options) {
    if (typeof provider === "function") {
        return provider(originalLink, options);
    }
    return transformers[provider](originalLink, options);
}
export default function rehypeImageOptimization(options) {
    const { provider, originValidation, optimizeSrcOptions: optimizeOptions, srcsetOptionsList, sizesOptionsList, style, } = options;
    const validateOrigin = (origin) => {
        if (originValidation === undefined) {
            return true;
        }
        if (typeof originValidation === "string") {
            return originValidation === origin;
        }
        if (originValidation instanceof RegExp) {
            return originValidation.test(origin);
        }
        if (typeof originValidation === "function") {
            return originValidation(origin);
        }
        throw new Error("Invalid originValidation option");
    };
    return function (tree) {
        visit(tree, "element", (node) => {
            if (node.tagName !== "img" || !node.properties.src) {
                return;
            }
            const originalLink = node.properties.src.toString();
            let origin;
            try {
                const url = new URL(originalLink);
                origin = url.origin;
            }
            catch {
                console.error("Invalid URL:", originalLink);
                return;
            }
            if (!validateOrigin(origin)) {
                return;
            }
            if (optimizeOptions !== undefined)
                node.properties.src = transformer(originalLink, provider, optimizeOptions);
            if (srcsetOptionsList !== undefined)
                node.properties.srcset = srcsetOptionsList
                    .map(([optimOptions, descriptor]) => `${transformer(originalLink, provider, optimOptions)} ${descriptor}`)
                    .join(", ");
            if (sizesOptionsList !== undefined)
                node.properties.sizes =
                    typeof sizesOptionsList === "string"
                        ? sizesOptionsList
                        : sizesOptionsList.join(", ");
            if (style) {
                if (node.properties.style === undefined)
                    node.properties.style = style;
                else
                    node.properties.style += " " + style;
            }
        });
    };
}
export function defineOptions(options) {
    return options;
}
//# sourceMappingURL=index.js.map