litejs/model/acl.js

Single-page application framework

!function(exports) {

	exports.createAcl = createAcl

	function createAcl(fn, modelCache) {

		return {
			check: check
		}

		function check(aclGroups, acl, _inherit) {
			if (!acl || !Array.isArray(aclGroups)) return false
			var tmp, inherit
			, fields = ["id"]
			, arr = acl.inherit
			, i = Array.isArray(arr) && arr.length
			, sum = i

			if (i) for (inherit = _inherit || {}; i--; ) {
				tmp = acl.inherit[i]
				tmp = tmp && !inherit[tmp] && modelCache[inherit[tmp] = tmp]
				tmp = tmp && tmp.data.enabled && check(aclGroups, tmp.data.acl, inherit)
				if (tmp === true) return true
				if (tmp) fields.push.apply(fields, tmp)
			}

			arr = acl.policy
			i = Array.isArray(arr) && arr.length
			sum += i

			if (i) for (i = acl.policy.length; i--; ) {
				tmp = acl.policy[i]
				if (
					tmp &&
					Array.isArray(tmp.who) &&
					tmp.acl & (_inherit ? 2 : 1) &&
					tmp.who.some(inArray, aclGroups) &&
					fn(tmp.acl, fields) === true
				) return true
			}

			return sum ? fields.length > 1 && fields : null
		}
	}

	function inArray(value) {
		return this.indexOf(value) > -1
	}
}(this)