"use strict"
Object.defineProperty(exports, "__esModule", { value: true })
const ALLOWED_PERMITTED_POLICIES = new Set(["none", "master-only", "by-content-type", "all"])
function getHeaderValueFromOptions({ permittedPolicies = "none" }) {
	if (ALLOWED_PERMITTED_POLICIES.has(permittedPolicies)) {
		return permittedPolicies
	} else {
		throw new Error(`X-Permitted-Cross-Domain-Policies does not support ${JSON.stringify(permittedPolicies)}`)
	}
}
function xPermittedCrossDomainPolicies(options = {}) {
	const headerValue = getHeaderValueFromOptions(options)
	return function xPermittedCrossDomainPoliciesMiddleware(_req, res, next) {
		res.setHeader("X-Permitted-Cross-Domain-Policies", headerValue)
		next()
	}
}
module.exports = xPermittedCrossDomainPolicies
exports.default = xPermittedCrossDomainPolicies
