A RxSwift helper for network calls, JSON decoding and image decoding

Summary: We propose a small helper in order to perform some classical asynchronous operations in RxSwift like: loading some Data with URLSession, decoding these Data onto some Decodable element or decoding these Data onto an UIImage .

RxSwift

RxSwift is ReactiveX for Swift.

More info here: https://github.com/ReactiveX/RxSwift

Description

We propose a small helper in order to perform some classical operations in RxSwift like: loading some Data with URLSession, decoding these Data onto some Decodable element or decoding these Data onto an UIImage .

These operations can benefit from being performed asynchronously with the help of RxSwift.

The helper is made of 3 building blocks:

• URLSession.download: takes an URL and produce a Single<Data>
• DecodeHelper.decode: takes some Data and produce a Single<T> where T conforms to Decodable
• ImageHelper.decode: takes some Data and produce a Single<UIImage>

These building blocks can be combined with flatMap, like below :

class RandomUserService: RandomUserServiceProtocol {
    
    func contentObservable() -> Single<RandomUserAPI.Content> {
        
        return URLSession.shared.download(url: RandomUserAPI.url)
            .flatMap( DecodeHelper.decode )
    }
    
    
}

URLSession+RxSwift.swift

This extension will help for doing network calls with RxSwift.

DecodeHelper.swift

This module will help for doing JSON decode in RxSwift.

ImageHelper.swift

This will help for doing image decode with RxSwift.