import { SamlSigningOptions } from "./types";

import { signXml } from "./xml";

export function assertRequired<T>(value: T | null | undefined, error?: string): asserts value {

if (value === undefined || value === null || (typeof value === "string" && value.length === 0)) {

throw new TypeError(error ?? "value does not exist");

}

}

export function assertBooleanIfPresent<T>(

value: T | null | undefined,

error?: string,

): asserts value {

if (value != null && typeof value != "boolean") {

throw new TypeError(error ?? "value is set but not boolean");

}

}

export function signXmlResponse(samlMessage: string, options: SamlSigningOptions): string {

const responseXpath =

'//*[local-name(.)="Response" and namespace-uri(.)="urn:oasis:names:tc:SAML:2.0:protocol"]';

return signXml(

samlMessage,

responseXpath,

{ reference: responseXpath, action: "append" },

options,

);

}

export function signXmlMetadata(metadataXml: string, options: SamlSigningOptions): string {

const metadataXpath =

'//*[local-name(.)="EntityDescriptor" and namespace-uri(.)="urn:oasis:names:tc:SAML:2.0:metadata"]';

return signXml(

metadataXml,

metadataXpath,

{ reference: metadataXpath, action: "prepend" },

options,

);

}