OMOS

Object mapper on steroid.

OMOS helps you map transform your object with ease.

Installation

To install OMOS: npm install --save omos or if you prefer Yarn: yarn add omos

Features

OMOS is a function that will take a schema as the first argument and source object as second argument and return the result. Simple as that!

import { transformWith } from 'omos';

const schema = {
  properties: [
    {
      from: "accountInformation.address.state",
      to: "profile.homeLocation",
    },
    {
      from: "accountInformation.hobbies",
      to: "accountInformation.hobbies",
    },
    {
      from: ["accountInformation.firstName", "accountInformation.lastName"],
      to: "profile.fullName",
      compute: (firstName, lastName) => `${firstName} ${lastName}`,
    },
    {
      from: "nbaProfile.mostPointPerGame",
      to: "carrer.mostPoint",
    },
  ],
};

const sourceObject = {
  accountInformation: {
    firstName: "Micheal",
    lastName: "Jordan",
    hobbies: ["Play Basketball", "Play Golf", "Count Rings"],
    address: {
      state: "Chicago"
    }
  },
  nbaProfile: {
    mostPointPerGame: 69,
  },
}

const result = transformWith(schema, sourceObject);

The result should be:

{
  profile: {
    fullName: "Micheal Jordan",
    homeLocation: "Chicago",
  },
  accountInformation: {
    hobbies: [ 'Play Basketball', 'Play Golf', 'Count Rings' ],
  },
  carrer: {
    mostPoint: 69,
  },
};

OMOS Schema explained

Properties

Schema for OMOS is is javascript object that requires a key named properties The value of properties is a array of matches. Each match must contains from and to key value, which is the key path to value of source object and target object.

{
  from: "accountInformation.address.state",
  to: "profile.homeLocation",
}

OMOS will fetch the data (even undefined) and write it to new object. But we all know that life is not simple like that. In some scenarioes, we need to compute the result value based on one or multiple fields in source object. You can use compute function to do such things. In case of multiple inputs, the order will be kept when value will be pass to compute.

{
  from: "to",
  to: "destination",
  compute: (value) => {
    return value.toUpperCase();
  }
}

{
  from: ["accountInformation.firstName", "accountInformation.lastName"],
  to: "profile.fullName",
  compute: (firstName, lastName) => `${firstName} ${lastName}`,
}

Initial value

If you want to have some init value (as template) for your object. You can pass it to initValue field inside schema

{
  initValue: {
    message: "This is a initValue for result object",
  },
  properties: [
    {},...
  ],
}

Contribution guide

Any contribution to this module is appreacited. Just fork the repo then send a merge reqeuest.