@fedify/fedify/dist/collection-D-HqUuA2.mjs

An ActivityPub server framework

import "@js-temporal/polyfill";
import "urlpattern-polyfill";
globalThis.addEventListener = () => {};
import { encodeHex } from "byte-encodings/hex";
//#region src/federation/collection.ts
/**
* Calculates the [partial follower collection digest][1].
*
* [1]: https://w3id.org/fep/8fcf#partial-follower-collection-digest
* @param uris The URIs to calculate the digest.  Duplicate URIs are ignored.
* @returns The digest.
*/
async function digest(uris) {
	const processed = /* @__PURE__ */ new Set();
	const encoder = new TextEncoder();
	const result = new Uint8Array(32);
	for (const uri of uris) {
		const u = uri instanceof URL ? uri.href : uri;
		if (processed.has(u)) continue;
		processed.add(u);
		const encoded = encoder.encode(u);
		const digest = new Uint8Array(await crypto.subtle.digest("SHA-256", encoded));
		for (let i = 0; i < 32; i++) result[i] ^= digest[i];
	}
	return result;
}
/**
* Builds [`Collection-Synchronization`][1] header content.
*
* [1]: https://w3id.org/fep/8fcf#the-collection-synchronization-http-header
*
* @param collectionId The sender's followers collection URI.
* @param actorIds The actor URIs to digest.
* @returns The header content.
*/
async function buildCollectionSynchronizationHeader(collectionId, actorIds) {
	const [anyActorId] = actorIds;
	const baseUrl = new URL(anyActorId);
	const url = new URL(collectionId);
	url.searchParams.set("base-url", `${baseUrl.origin}/`);
	return `collectionId="${collectionId}", url="${url}", digest="${encodeHex(await digest(actorIds))}"`;
}
//#endregion
export { digest as n, buildCollectionSynchronizationHeader as t };