index.js

/****************************************************************************
 * Copyright 2016-2017, Optimizely, Inc. and contributors                   *
 *                                                                          *
 * Licensed under the Apache License, Version 2.0 (the "License");          *
 * you may not use this file except in compliance with the License.         *
 * You may obtain a copy of the License at                                  *
 *                                                                          *
 *    http://www.apache.org/licenses/LICENSE-2.0                            *
 *                                                                          *
 * Unless required by applicable law or agreed to in writing, software      *
 * distributed under the License is distributed on an "AS IS" BASIS,        *
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
 * See the License for the specific language governing permissions and      *
 * limitations under the License.                                           *
 ***************************************************************************/

var configValidator = require('./lib/utils/config_validator');
var defaultErrorHandler = require('./lib/plugins/error_handler');
var defaultEventDispatcher = require('./lib/plugins/event_dispatcher');
var enums = require('./lib/utils/enums');
var fns = require('./lib/utils/fns');
var jsonSchemaValidator = require('./lib/utils/json_schema_validator');
var logger = require('./lib/plugins/logger');
var sprintf = require('sprintf');

var Optimizely = require('./lib/optimizely');

var MODULE_NAME = 'INDEX';

/**
 * Entry point into the Optimizely Node testing SDK
 */
module.exports = {
  /**
   * Creates an instance of the Optimizely class
   * @param  {Object} config
   * @param  {Object} config.datafile
   * @param  {Object} config.errorHandler
   * @param  {Object} config.eventDispatcher
   * @param  {Object} config.jsonSchemaValidator
   * @param  {Object} config.logger
   * @param  {Object} config.userProfileService
   * @return {Object} the Optimizely object
   */
  createInstance: function(config) {
    var defaultLogger = logger.createNoOpLogger();
    if (config) {
      try {
        configValidator.validate(config);
        config.isValidInstance = true;
      } catch (ex) {
        if (config.logger) {
          config.logger.log(enums.LOG_LEVEL.ERROR, sprintf('%s: %s', MODULE_NAME, ex.message));
        } else {
          var simpleLogger = logger.createLogger({logLevel: 4});
          simpleLogger.log(enums.LOG_LEVEL.ERROR, sprintf('%s: %s', MODULE_NAME, ex.message));
        }
        config.isValidInstance = false;
      }
    }

    config = fns.assign({
      clientEngine: enums.NODE_CLIENT_ENGINE,
      clientVersion: enums.NODE_CLIENT_VERSION,
      errorHandler: defaultErrorHandler,
      eventDispatcher: defaultEventDispatcher,
      jsonSchemaValidator: jsonSchemaValidator,
      logger: defaultLogger,
      skipJSONValidation: false
    }, config);

    return new Optimizely(config);
  }
};