AlexeyGrishin/schemasaurus

"use strict";

function defaultLoader() {
    throw new Error("Remote refs are not supported for now :(");
}

function detilde(s) {
    return s.replace(/~0/g, "~").replace(/~1/g, "/");   //do not know how to parse it other way
}

function resolveRef(loader, schemaNode, ref) {
    var remLoc = decodeURI(ref).split("#"), rem = remLoc[0], loc = remLoc[1].split("/").map(detilde), st = schemaNode, i;
    if (rem !== '') {
        st = (loader || defaultLoader)(rem);
    }
    for (i = 0; i < loc.length; i = i + 1) {
        if (loc[i] === '') {
            //noinspection JSLint
            continue;
        }
        st = st[loc[i]];
        if (st === undefined) {
            throw new Error("Cannot find ref '" + ref + "' in schema");
        }
    }
    return st;
}

module.exports = resolveRef;