README

lodash-mixin-diff-value

This is a lodash mixin for getting a JSON object that rappresent the value variation of a JSON respect another.

Installation

npm install lodash-mixin-diff-value

Usage

const _ = require('lodash');
const differenceValues = require('lodash-mixin-diff-value');

_.mixin({ differenceValues });

const diff = _.differenceValues(editedJson, originalJson[, options]);

options is a json with the fields:

Key	Values	Default	Description
extract	`[only-add, only-remove, only-changed, only-add-change]`	`only-add-change`	Described below
dateCheck	`true` or `false`	`true`	For performance: deactivate the date object and string evaluation
dateFormatIn	momentjs formats	`YYYY-MM-DDTHH:mm:ss.sssZ`	The format to use to evaluate string during date checking
dateFormatOut	momentjs formats	`YYYY-MM-DDTHH:mm:ss.sssZ`	The format to use to evaluate date-string comparison

Field: extract

only-add: will return only field that occurs in editedJson and not in originalJson
only-remove: will return only field that not occurs in editedJson and are in originalJson
only-changed: will return only field that occurs in editedJson and originalJson too
only-add-change: like only-add + only-changed

Field: dateCheck

If true: activate deep controls for the date object and strings. The input are evaluated with the options.dateFormatIn format and compared using the options.dateFormatOut format. This will enable you to read corectly a date in a format like options.dateFormatIn: YYYY-MM-DD but consider the date changed only if the year and month change options.dateFormatOut: YYYY-MM.

If false: only Date objects are evaluated as date.toJSON() for comparison.

Field: dateFormat

This format let you to execute the diff value on portion of the date string not only on the complete date. This cost in performance because all the string will be checked if match with this format.

Test

For run the tests simply execute:

npm test

Example

See test for more examples.

const oldObj = {
  a: 'b',
  arr: [1, 2, 3, { a: 111 }],
  more: 'more',
  intarr: [1, 2, 3, 4],
  newarr: [{ k: 'XXX' }, { k: 'val' }, 3333],
  arrtwo: [{ k: 'nod' }, { k: 'val' }],
  json: { a: 'a', b: 'b', c: 'c', d: { deep: [12, 3, { mode: 'deep' }] } },
  o: { sub: 'json' },
};

const newObj = {
  a: 'b',
  arr: [1, 22, 3, { a: 111, q: 'none' }],
  intarr: [1, 2, 3, 4],
  newarr: [{ k: 'XXX' }, { k: 'val' }, 3333],
  arrtwo: [{ k: 'XXX' }, { k: 'val' }, 3333],
  json: { a: 'a', b: 'b', c: 'c', d: { deep: [12, 333, { mode: 'deeper' }] } },
  o: { sub: 'json' },
};

const out = _.differenceValues(newObj, oldObj);

// Will print out:
{
  "arr": [
    22,
    {
      "q": "none"
    }
  ],
  "arrtwo": [
    {
      "k": "XXX"
    },
    3333
  ],
  "json": {
    "d": {
      "deep": [
        333,
        {
          "mode": "deeper"
        }
      ]
    }
  }
}

Todo

JSDoc
More test and validity-check
Managen functions

License

(The MIT License)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Usage no npm install needed!