Jsona
Framework agnostic, customizable library that provide data formatters to simplify work with JSON API v1.0 specification.
What problem does it solve?
When you work with API standardized to json:api specification, you're dealing with a special and optimized JSON data format in the request and response body.
You can get data of several entities that are related to each other, but you'll receive it in array (included).
You may need to send modified back to server (or new data) in accordance with specification.
This may puzzle you with the following questions:
- How to get necessary entity from
included
array many times more inconvenient and optimal? - How to describe data from server, working with typings (TypeScript, Flow)?
- How to send JSON to the server without manually assembling JSON in accordance with specification?
Jsona solves this problems by providing:
- converter from JSON to simplified objects (some denormalized structure, wich is easy to typify)
- converter from simplified objects to JSON (in according with json:api specification)
- converter from "reduxObject" to simplified objects (
reduxObject
is a result object of json-api-normalizer)
NOTE: This README describes latest stable version. You can read README for old versions 0.2.x here
Installation
npm install jsona
or
yarn add jsona
How to use
You need to instantiate Jsona ones, then use it's public methods to convert data.
import Jsona from 'jsona';
const dataFormatter = new Jsona();
deserialize - creates simplified object(s) from json
const json = {
data: {
type: 'town',
id: '123',
attributes: {
name: 'Barcelona'
},
relationships: {
country: {
data: {
type: 'country',
id: '32'
}
}
}
},
included: [{
type: 'country',
id: '32',
attributes: {
name: 'Spain'
}
}]
};
const town = dataFormatter.deserialize(json);
console.log(town);
serialize - creates json from simplified object(s)
const user = {
type: 'user',
id: 1,
categories: [{ type: 'category', id: '1', name: 'First category' }],
town: {
type: 'town',
id: '123',
name: 'Barcelona',
country: {
type: 'country',
id: '32',
name: 'Spain'
},
relationshipNames: ['country']
},
relationshipNames: ['categories', 'town']
};
const newJson = dataFormatter.serialize({
stuff: user,
includeNames: ['categories', 'town.country']
});
console.log(newJson);
denormalizeReduxObject - creates simplified object(s) from reduxObject
"reduxObject" - result object of json-api-normalizer
const reduxObject = reduxStore.entities;
const town = dataFormatter.denormalizeReduxObject({reduxObject, entityType: 'town', entityIds: '123'});
console.log(town);
Customize
Build process and property names
You can control process of building simplified objects, just use your own propertyMappers when Jsona instantiates.
With IJsonPropertiesMapper you can implement your way of creation simplified objects (data models) from JSON, with IModelPropertiesMapper implement how to give back values from data model to JSON.
It gives unlimited possibilities to integrate Jsona with react, redux, angular2
Example of passing your own propertyMappers to Jsona:
import Jsona from 'jsona';
import {MyModelPropertiesMapper, MyJsonPropertiesMapper} from 'myPropertyMappers';
export default const dataFormatter = new Jsona({
modelPropertiesMapper: MyModelPropertiesMapper,
jsonPropertiesMapper: MyJsonPropertiesMapper
});
Also, there is built-in switchCasePropertyMappers, that you can use if need to automatically transform property names from kebab, snake, camel case and back.
Cache
For faster creation of simplified objects from json, it uses a cache for already processed json-entity, see DeserializeCache that uses by default.
It possible to provide your own IDeserializeCache manager:
import Jsona from 'jsona';
import {MyOwnDeserializeCache} from './index';
export default const dataFormatter = new Jsona({
DeserializeCache: MyOwnDeserializeCache
});
License
Jsona, examples provided in this repository and in the documentation are MIT licensed.