Default JsonEncoder and JsonDecoder to reuse across the app.

DefaultJsonEncoderDecoder.swift

import Foundation

extension JSONEncoder {
    /// Returns a JSONEncoder object using:
    /// * `.convertToSnakeCase` as `keyEncodingStrategy`.
    /// * `.iso8601` as `.dateEncodingStrategy`.
    static var `default`: JSONEncoder {
        let encoder = JSONEncoder()
        encoder.keyEncodingStrategy = .convertToSnakeCase
        encoder.dateEncodingStrategy = .iso8601
        return encoder
    }
}

extension JSONDecoder {
    /// Returns a JSONDecoder object using:
    /// *  `.convertFromSnakeCase` as` keyDecodingStrategy`.
    /// * `.iso8601` as `.dateDecodingStrategy`.
    static var `default`: JSONDecoder {
        let decoder = JSONDecoder()
        decoder.keyDecodingStrategy = .convertFromSnakeCase
        decoder.dateDecodingStrategy = .iso8601
        return decoder
    }
}