bpmn-js-cli/lib/parsers/elements.js

A command-line interface for bpmn-js

import {
  isObject,
  isString,
  isArray
} from 'min-dash';

/**
 * Parses a list of elements from a list of
 * objects or a comma-separated string
 */
export default function ElementsParser(elementRegistry) {

  return function(args, options) {

    if (isString(args)) {
      args = args.split(',');
    } else
      if (!isArray(args)) {
        args = [ args ];
      }

    return args.map(function(arg) {

      // assume element passed is shape already
      if (isObject(arg)) {
        return arg;
      }

      var e = elementRegistry.get(arg);
      if (!e) {
        if (options.optional) {
          return null;
        } else {
          if (arg) {
            throw new Error('element with id <' + arg + '> does not exist');
          } else {
            throw new Error('argument required');
          }
        }
      }

      return e;
    }).filter(function(e) { return e; });
  };
}

ElementsParser.$inject = [ 'elementRegistry' ];