RepositoryViewModel.swift

import Foundation
import RxCocoa
import RxSwift
import Alamofire

//this protocol represents a repository view model then anyone can implement this and perform the fetch.
protocol RepositoryViewModelType {
    
    func fetchRepositories(for observableText: Observable<String>) -> Driver<Result<[Repository]>>
}

struct RepositoryViewModel : RepositoryViewModelType {
    
    func fetchRepositories(for observableText: Observable<String>) -> Driver<Result<[Repository]>> {
        return RepositoryNetworking
            .fetchRepositories(for: observableText)
    }
}