swift-composing-types.swift

typealias DCRequestType = (URLRequest, Error)

//basically makePostRequest should be a function that returns a URLRequest. Straightforward.
// I want the return type to be either a URlRequest or an Error. <URLRequest, Error> something of this kind.
// You see what I'm doing right?

fileprivate func makePostRequest(apiUrl: String, params: [String: String]) -> <URLRequest, Error> {
        // build url
        let urlString = "\(dcoderURL)\(apiUrl)"
        guard let serviceUrl = URL(string: urlString) else { return nil }
        
        // build url request
        var request = URLRequest(url: serviceUrl)
        request.httpMethod = "POST"
        request.setValue("Application/json", forHTTPHeaderField: "Content-Type")
        
        //set http body for url request with incoming params
        guard let httpBody = try? JSONSerialization.data(withJSONObject: params, options: []) else {
            return nil
        }
        request.httpBody = httpBody
        return request
    }
}

//The code about would make lines 29-36 obsolete with just one go. The error can be consumed here to actually throw it back to the UI

// func sendRegistrationCode(userEmail:String, username:String, userPassword:String, userUsername:String, completion: @escaping (SendCodeModel?, Error?) -> ()) {
    
//         let urlString = "\(dcoderURL)\(sendRegistrationCodeURL)"
//         let params = ["user_email":userEmail,"user_name":username,"user_password":userPassword,"user_username":userUsername]
//         guard let serviceUrl = URL(string: urlString) else { return }
//         var request = URLRequest(url: serviceUrl)
//         request.httpMethod = "POST"
//         request.setValue("Application/json", forHTTPHeaderField: "Content-Type")
//         guard let httpBody = try? JSONSerialization.data(withJSONObject: params, options: []) else {
//             return
//         }
//         request.httpBody = httpBody
// }