regard/lib/managers/connectors.js

Sugar-interface to access multiple data sources.

var _ = require('lodash'),
    AbstractManager = require('./abstract');

exports = module.exports = ConnectorsManager;

function ConnectorsManager() {
  if (!(this instanceof ConnectorsManager)) {
    return new ConnectorsManager();
  }

  AbstractManager.call(this);
}

ConnectorsManager.prototype = _.create(AbstractManager.prototype);

ConnectorsManager.prototype.core = function (name) {
  var connector,
      path = '../connectors/'+name;

  try {
    connector = require(path);
  } catch (err) {
    if (err.code !== 'MODULE_NOT_FOUND' || err.message.indexOf("Cannot find module '"+path+"'") === -1) {
      throw err;
    }
  }

  return connector;
};

ConnectorsManager.prototype.resolve = function (endpoint) {
  var connector = endpoint.connector,
      parent = endpoint.parent;

  if (_.isUndefined(connector) && _.isObject(parent)) {
    connector = parent.connector;
  }

  if (_.isString(connector)) {
    connector = this.get(connector);
  }

  if (_.isUndefined(connector)) {
    connector = _.find(this.data,
      function (value) {
        return _.isFunction(value.checkPath) && value.checkPath(endpoint.path);
      }
    );
  }

  if (!_.isObject(connector)) {
    connector = undefined;
  }

  return connector;
};