/* @flow */
"use strict"

const _ = require("lodash")
const hasBlock = require("../utils/hasBlock")

/**
 * Check whether a Node is a custom property set
 */
module.exports = function (node/*: Object*/)/*: boolean*/ {
  const selector = _.get(node, "raws.selector.raw", node.selector)

  return node.type === "rule" && hasBlock(node) && selector.slice(0, 2) === "--" && selector.slice(-1) === ":"
}