@mindhive/di/dist/init.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.initModules = undefined;

var _typeof2 = require('babel-runtime/helpers/typeof');

var _typeof3 = _interopRequireDefault(_typeof2);

var _appContext = require('./appContext');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/*
 A module should be defined as default export as a function the takes (appContext).

 A module can add to the appContext by returning an object from this function where
 the properties are the names and objects to add to the appContext. For example:

 export default ({ existingService }) => { newService: new Service(existingService) }

 The order is important as each module adds new services into the context, and then
 the context is passed into the next module.
 */

var sanityCheckModules = function sanityCheckModules(modules) {
  modules.forEach(function (m, i) {
    if (typeof m !== 'function') {
      throw new Error('initModules() module index ' + i + ' (' + modules.length + ' total) is ' + (typeof m === 'undefined' ? 'undefined' : (0, _typeof3.default)(m)) + ', not a function');
    }
  });
};

var sanityCheckDuplicateContextName = function sanityCheckDuplicateContextName(newNames) {
  var existingContextNames = new Set(Object.keys(_appContext.appContext));
  newNames.forEach(function (newName) {
    if (existingContextNames.has(newName)) {
      throw new ReferenceError('initModules() with more than one context member called "' + newName + '"');
    }
  });
};

var initModules = exports.initModules = function initModules(modules) {
  sanityCheckModules(modules);
  modules.forEach(function (module) {
    var context = module(_appContext.appContext);
    if (context) {
      sanityCheckDuplicateContextName(Object.keys(context));
      Object.assign(_appContext.appContext, context);
    }
  });
};