src/shared/index.ts

import { ScramjetConfig, ScramjetFlags } from "../types";

export let codecEncode: (input: string) => string;
export let codecDecode: (input: string) => string;

const nativeFunction = Function;
export function loadCodecs() {
	codecEncode = nativeFunction(`return ${config.codec.encode}`)() as any;
	codecDecode = nativeFunction(`return ${config.codec.decode}`)() as any;
}

export function flagEnabled(flag: keyof ScramjetFlags, url: URL): boolean {
	const value = config.flags[flag];
	for (const regex in config.siteFlags) {
		const partialflags = config.siteFlags[regex];
		if (new RegExp(regex).test(url.href) && flag in partialflags) {
			return partialflags[flag];
		}
	}

	return value;
}

export let config: ScramjetConfig;
export function setConfig(newConfig: ScramjetConfig) {
	config = newConfig;
	loadCodecs();
}