Haketilo

/*

 * Regex to parse URIs like:

 *     https://hydrilla.koszko.org/schemas/api_mapping_description-2.schema.json

 */

const name_base_re    = "(?<name_base>[^/]*)";

const major_number_re = "(?<major>[1-9][0-9]*)";

const minor_number_re = "(?:[1-9][0-9]*|0)";

const numbers_rest_re = `(?:\\.${minor_number_re})*`;

const version_re      = `(?<ver>${major_number_re}${numbers_rest_re})`;

const schema_name_re  = `${name_base_re}-${version_re}\\.schema\\.json`;

const haketilo_schema_name_regex = new RegExp(schema_name_re);

#EXPORT haketilo_schema_name_regex

/* Extract the number that indicates entity's compatibility mode. */

function get_schema_major_version(instance) {

    const match = haketilo_schema_name_regex.exec(instance.$schema);

    return parseInt(match.groups.major);

}

#EXPORT get_schema_major_version