json-schema-library/dist/module/lib/compile/joinScope.js

Customizable and hackable json-validator and json-schema utilities for traversal, data generation and validation

/* eslint max-statements-per-line: ["error", { "max": 2 }] */
const suffixes = /(#)+$/;
const trailingHash = /#$/;
const startingHashAndSlash = /^[#/]+/;
const isDomain = /^[^:]+:\/\/[^/]+\//;
const trailingFragments = /\/[^/]*$/;
const idAndPointer = /#.*$/;
// @todo add missing test for urn ids
const isURN = /^urn:uuid:[0-9A-Fa-f]/;
export default function joinScope(previous, id) {
    if (previous == null && id == null) {
        return "#";
    }
    if (id == null) {
        return previous.replace(trailingHash, "");
    }
    if (isURN.test(id)) {
        return id;
    }
    if (previous == null || previous === "" || previous === "#") {
        return id.replace(trailingHash, "");
    }
    if (id[0] === "#") {
        return `${previous.replace(idAndPointer, "")}${id.replace(suffixes, "")}`;
    }
    if (isDomain.test(id)) {
        return id.replace(trailingHash, "");
    }
    if (isDomain.test(previous) && id.startsWith("/")) {
        // we have a domain that should be joined with an absolute path
        // thus we have to remove all paths from domain before joining
        return `${previous.replace(/(^[^:]+:\/\/[^/]+)(.*)/, "$1")}/${id.replace(startingHashAndSlash, "")}`;
    }
    return `${previous.replace(trailingFragments, "")}/${id.replace(startingHashAndSlash, "")}`;
}