redux-logger/lib/diff.js

'use strict';

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

var _deepDiff = require('deep-diff');

var _deepDiff2 = _interopRequireDefault(_deepDiff);

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

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

// https://github.com/flitbit/diff#differences
var dictionary = {
  'E': {
    color: '#2196F3',
    text: 'CHANGED:'
  },
  'N': {
    color: '#4CAF50',
    text: 'ADDED:'
  },
  'D': {
    color: '#F44336',
    text: 'DELETED:'
  },
  'A': {
    color: '#2196F3',
    text: 'ARRAY:'
  }
};

function style(kind) {
  return 'color: ' + dictionary[kind].color + '; font-weight: bold';
}

function render(diff) {
  var kind = diff.kind;
  var path = diff.path;
  var lhs = diff.lhs;
  var rhs = diff.rhs;
  var index = diff.index;
  var item = diff.item;

  switch (kind) {
    case 'E':
      return [path.join('.'), lhs, '→', rhs];
    case 'N':
      return [path.join('.'), rhs];
    case 'D':
      return [path.join('.')];
    case 'A':
      return [path.join('.') + '[' + index + ']', item];
    default:
      return [];
  }
}

function diffLogger(prevState, newState, logger, isCollapsed) {
  var diff = (0, _deepDiff2.default)(prevState, newState);

  try {
    if (isCollapsed) {
      logger.groupCollapsed('diff');
    } else {
      logger.group('diff');
    }
  } catch (e) {
    logger.log('diff');
  }

  if (diff) {
    diff.forEach(function (elem) {
      var kind = elem.kind;

      var output = render(elem);

      logger.log.apply(logger, ['%c ' + dictionary[kind].text, style(kind)].concat(_toConsumableArray(output)));
    });
  } else {
    logger.log('—— no diff ——');
  }

  try {
    logger.groupEnd();
  } catch (e) {
    logger.log('—— diff end —— ');
  }
}
module.exports = exports['default'];