redux-map-gl/dist/reducer.js

Simplify react-map-gl and redux

'use strict';

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

var _defineProperty2 = require('babel-runtime/helpers/defineProperty');

var _defineProperty3 = _interopRequireDefault(_defineProperty2);

var _extends3 = require('babel-runtime/helpers/extends');

var _extends4 = _interopRequireDefault(_extends3);

exports.createViewportReducer = createViewportReducer;
exports.default = enhanceReducer;

var _immutable = require('immutable');

var _types = require('./types');

var _types2 = _interopRequireDefault(_types);

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

var identityReducer = function identityReducer(state) {
  return state;
};

/**
 * viewportReducer can be used directly as a reducer rather than an enhancer
 * @param  {[type]} defaults [description]
 * @param  {[Object]} defaults = {} defaults for the initial state
 * @param  {[String]} key = 'viewport' The key which the state should be stored under
 * @return {Function} A viewport reducer
 */
function createViewportReducer(defaults, key) {
  return enhanceReducer(identityReducer, defaults, key);
}

/**
 * Enhance a reducer by adding support for managing react-map-gl state.
 * @param  {Function} reducer The reducer to enhance
 * @param  {[Object]} defaults = {} defaults for the initial state
 * @param  {[String]} key = 'viewport' The key which the state should be stored under
 * @return {Function} An enhanced reducer
 */
function enhanceReducer(reducer) {
  var defaults = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
  var key = arguments.length <= 2 || arguments[2] === undefined ? 'viewport' : arguments[2];

  var initialState = (0, _defineProperty3.default)({}, key, (0, _immutable.fromJS)((0, _extends4.default)({
    latitude: 0,
    longitude: 0,
    bearing: 0,
    zoom: 1,
    isDragging: false,
    startDragLngLat: undefined
  }, defaults)));

  return function () {
    var state = arguments.length <= 0 || arguments[0] === undefined ? initialState : arguments[0];
    var action = arguments[1];

    switch (action.type) {
      case _types2.default.CHANGE_VIEWPORT:
        {
          return (0, _extends4.default)({}, state, (0, _defineProperty3.default)({}, key, state[key].merge(action.payload.mapState)));
        }
      default:
        return reducer(state, action);
    }
  };
}