blips/lib/utils/extendContext.js

State management for the GraphQL heads

'use strict';

exports.__esModule = true;

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.extendContext = extendContext;

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }

var STORE_EXTEND_WARNING = exports.STORE_EXTEND_WARNING = 'You cannot extend the context with an object containing a "store" prop. It will be omitted and the other props will be added';
var buildPropExistsWarning = exports.buildPropExistsWarning = function buildPropExistsWarning(propName) {
  return 'The "' + propName + '" property already exists in the context object. Make sure you haven\'t replaced anything important';
};

function extendContext(defaultContext, context) {
  if (!context || // nil or falsy
  (typeof context === 'undefined' ? 'undefined' : _typeof(context)) !== 'object' || // not an object
  context.hasOwnProperty('length') || // array
  context.hasOwnProperty('size') // map
  ) {
      return defaultContext;
    }

  var store = context.store,
      ctx = _objectWithoutProperties(context, ['store']);

  if (store) {
    // eslint-disable-next-line
    console.warn(STORE_EXTEND_WARNING);
  }

  for (var _iterator = Object.keys(ctx), _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
    var _ref;

    if (_isArray) {
      if (_i >= _iterator.length) break;
      _ref = _iterator[_i++];
    } else {
      _i = _iterator.next();
      if (_i.done) break;
      _ref = _i.value;
    }

    var propName = _ref;

    if (defaultContext.hasOwnProperty(propName)) {
      // eslint-disable-next-line
      console.warn(buildPropExistsWarning(propName));
    }
  }

  return _extends({}, defaultContext, ctx);
}