data-commander

Migrate data from schema.

Installation

yarn add data-commander

Usage

Migrate

import { Commander, SetCommand, DeleteCommand } from 'data-commander';

const data = {
  x: 1,
  y: 2,
};

const commander = new Commander([
  new SetCommand(['x'], 10),
  new DeleteCommand(['y']),
]);

commander.execute(data);

console.log(data); // { x: 10 }

Create Schema

const data = {
  x: 1,
  y: 2,
};

const commander = new Commander([
  new SetCommand(['x'], 10),
  new DeleteCommand(['y']),
]);

const schema = commander.execute({});
// {
//   up: [
//     { type: 'set', path: ['x'], data: 10 },
//     { type: 'delete', path: ['y'], data: null }
//   ],
//   down: [
//     {type: 'set', path: ['y'], data: 2 },
//     { type: 'set', path: ['x'], data: 1 }
//   ],
//   id: 'c5rgDxMM_pML9079'
// }

Migrate or Revert

const data = {
  x: 1,
  y: 2,
};

const commander = new Commander([
  new SetCommand(['x'], 10),
  new DeleteCommand(['y']),
]);

const schema = commander.execute(data);
console.log(data); // { x: 10 }

Commander.fromSchema(schema).revert(data);
console.log(data); // { x: 1, y: 2 }

Commander.fromSchema(schema).migrate(data);
console.log(data); // { x: 10 }

Commands

SetCommand

Set a value to specific path.

const data = {};
const commander = new Commander([
  new SetCommand(['test'], { hello: 'world' })
]);

commander.execute(data);

console.log(data); // { test: { hello: 'world' } }

DeleteCommand

Delete a specific object property or array item.

const data = { a: 1, b: 2 };
const commander = new Commander([
  new DeleteCommand(['a'])
]);

commander.execute(data);

console.log(data); // { b: 2 }

InsertCommand

Insert an item to array with specific index.

const data = ['a', 'b'];
const commander = new Commander([
  new InsertCommand(['1'], 'c')
]);

commander.execute(data);
console.log(data); // ['a', 'c', 'b']

commander.execute(data);
console.log(data); // ['a', 'c', 'c', 'b']

LpushCommand

Left push an item to array.

const data = ['a', 'b'];
const commander = new Commander([
  new LpushCommand([], 'c')
]);

commander.execute(data);
console.log(data); // ['c', 'a', 'b']

commander.execute(data);
console.log(data); // ['c', 'c', 'a', 'b']

RpushCommand

Right push an item to array.

const data = ['a', 'b'];
const commander = new Commander([
  new RpushCommand([], 'c')
]);

commander.execute(data);
console.log(data); // ['a', 'b', 'c']

commander.execute(data);
console.log(data); // ['a', 'b', 'c', 'c']

MergeCommand

Merge deep object to another object.

const data = {
  x: {
    y: 1,
    z: 3,
  },
};

const commander = new Commander([
  new MergeCommand({
    x: {
      y: 2,
      m: {
        n: 4,
      },
    },
  }),
]);

commander.execute(data);
console.log(data);
// {
//     x: {
//         y: 2,
//         z: 3,
//         m: {
//             n: 4
//         }
//     }
// }

OR merge an array item.

const data = ['a', 'b'];

const commander = new Commander([
  new MergeCommand(['4': 'c']),
]);

commander.execute(data);
console.log(data); // [ 'a', 'b', <empty>, <empty>, 'c' ]