node-dijkstra/libs/validateDeep.js

A NodeJS implementation of Dijkstra's algorithm

/**
 * Validate a map to ensure all it's values are either a number or a map
 *
 * @param {Map} map - Map to valiadte
 */
function validateDeep(map) {
  if (!(map instanceof Map)) {
    throw new Error(`Invalid graph: Expected Map instead found ${typeof map}`);
  }

  map.forEach((value, key) => {
    if (typeof value === 'object' && value instanceof Map) {
      validateDeep(value);
      return;
    }

    if (typeof value !== 'number' || value <= 0) {
      throw new Error(`Values must be numbers greater than 0. Found value ${value} at ${key}`);
    }
  });
}

module.exports = validateDeep;