diffusion/src/node_modules/topics/topic-path-utils.js

Diffusion JavaScript client

/*eslint valid-jsdoc: "off"*/
/**
 * The topic path separator character.
 */
var PATH_SEPARATOR = '/';

/**
 * Split a path into parts.
 *
 * @param path the path
 * @return the parts;
 */
function split(path) {
    return path.split(PATH_SEPARATOR);
}

/**
 * Provide a canonical representation of a given path, stripping leading and
 * trailing path separators
 *
 * @param {String} path
 * @returns {String} The canonicalised path
 */
function canonicalise(path) {
    if (!path) {
        return "";
    }

    var l = path.length,
        s = l > 0 && path.charAt(0) === PATH_SEPARATOR ? 1 : 0,
        e = l > 1 && path.charAt(l - 1) === PATH_SEPARATOR ? 1 : 0;

    return path.substring(s, l - e);
}

/**
 * Minimal representation of DescendantQualifier enum type.
 */
function DQ(descendants) {
    this.includesDescendants = descendants;
}

var qualifiers = {
    MATCH: new DQ(false),
    DESCENDANTS_OF_MATCH: new DQ(true),
    MATCH_AND_DESCENDANTS: new DQ(true)
};

module.exports = {
    split: split,
    canonicalise: canonicalise,
    PATH_SEPARATOR: PATH_SEPARATOR,
    DescendantQualifier: qualifiers
};