Example struct to generate api url

ApiUrl.swift

protocol Api {
    var path: String { get }
}

struct QiitaApi: Api {
    var path: String {
        protocolName + domain + "/" + version + "/" + directory
    }
    
    private let protocolName = "https://"
    private var domain: String {
        #if DEBUG
        return "staging-qiita.com"
        #elseif RELEASE
        return "qiita.com"
        #endif
    }
    private var version: String {
        "api/v2"
    }
    let directory: String
}

extension QiitaApi {
    static var items: QiitaApi {
        .init(directory: "items")
    }
    
    /*
     * Add other pattern
     */
}

/*
 * DataStore Example
 */
func load<T: Api>(api: T) {
    guard let url = URL(string: api.path) else {
        return
    }
    // URLSession etc.
}

/*
 * Usage
 */
load(api: QiitaApi.items)