const ptr = require("json-pointer");

module.exports = function resolvePointer(data, rootPath, relativePath) {
    if (relativePath[0] === "/") return ptr.get(data, relativePath);

    const m = relativePath.match(/^(\d+)(.*)/);
    relativePath = m[2];
    for (let i = 0; i < parseInt(m[1]); i++) {
        rootPath = rootPath.replace(/\/[^\/]+$/, "");
    }

    return ptr.get(data, rootPath + relativePath);
}