gendiff-ewwwgeny/dist/ast.js

gendiff for Hexlet

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _lodash = _interopRequireDefault(require("lodash"));

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

const buildDiffTree = (obj1, obj2) => {
  const keys = _lodash.default.union(_lodash.default.keys(obj1), _lodash.default.keys(obj2));

  const buildNodeMethods = [{
    check: key => !_lodash.default.has(obj1, key),
    process: key => ({
      type: 'added',
      key,
      currentValue: obj2[key]
    })
  }, {
    check: key => !_lodash.default.has(obj2, key),
    process: key => ({
      type: 'deleted',
      key,
      currentValue: obj1[key]
    })
  }, {
    check: key => _lodash.default.isObject(obj1[key]) && _lodash.default.isObject(obj2[key]),
    process: key => ({
      type: 'nested',
      key,
      children: buildDiffTree(obj1[key], obj2[key])
    })
  }, {
    check: key => obj1[key] === obj2[key],
    process: key => ({
      type: 'unchanged',
      key,
      currentValue: obj1[key]
    })
  }, {
    state: 'changed',
    check: key => obj1[key] !== obj2[key],
    process: key => ({
      type: 'changed',
      key,
      oldValue: obj1[key],
      currentValue: obj2[key]
    })
  }];

  const getMethod = key => buildNodeMethods.find(({
    check
  }) => check(key));

  const diff = keys.map(key => {
    const currentMethod = getMethod(key);
    const node = currentMethod.process(key);
    return node;
  });
  return diff;
};

var _default = buildDiffTree;
exports.default = _default;
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