Easy way to safe in userDefault within Combine flow

ReadMe.md

Easy way to safe in userDefault within Combine flow

function name: safeInUserDefaultFirst Encode Publisher Ouput, safe in userDefault within key and then continuous the flow

function name: safeInUserDefault Encode Publisher Ouput, safe in userDefault within key and then finishes the flow

Extension.swift

import Combine

extension Publisher where Self.Output: Encodable {
    
    func safeInUserDefaultFirst(_ key: String) -> AnyPublisher<Self.Output, Self.Failure> {
        return flatMap { (output)-> Just<Self.Output> in
            let data = try? JSONEncoder().encode(output)
            UserDefaults.standard.set(data, forKey: key)
            return Just(output)
        }.eraseToAnyPublisher()
    }
    
}

extension Publishers.Decode {
    func safeInUserDefaultFirst(_ key: String) -> AnyPublisher<Self.Output, Self.Failure> where Self.Output: Codable {
        return flatMap { (output)-> Just<Self.Output> in
            let data = try? JSONEncoder().encode(output)
            UserDefaults.standard.set(data, forKey: key)
            return Just(output)
        }.eraseToAnyPublisher()
    }
}

extension Publisher where Self.Output: Encodable {
    
    func safeInUserDefault(_ key: String)-> AnyCancellable {
        return sink(receiveCompletion: { _ in }, receiveValue: {
            let data = try? JSONEncoder().encode($0)
            UserDefaults.standard.set(data, forKey: key)
        })
    }
}