Display data from POST request Swift - ios

Question

New to swift and wanted to display some data from a post request each time a user presses a button.
Class and struct for Post request:
import Foundation
struct Response: Codable, Identifiable{
var id = UUID()
var model = String()
var choices = String()
var generatedtext: [GeneratedText]
}
struct GeneratedText: Codable{
var finish_reason = String()
var index = Int()
var logprobs = String()
var text = String()
}
class GPT3TextComepletion: ObservableObject{
#Published var response = [Response]()
func textCompletion(promptText:String, completion:#escaping ([Response]) -> () ){
let token = "redacted"
let url = URL(string: "redacted URL")!
// prepare json data
var json: [String: Any] = [
"temperature": 0.8,
"max_tokens": 64,
"top_p": 1,
"frequency_penalty": 0,
"presence_penalty": 0,
"stop": ["\n\n"]]
json["prompt"] = promptText
let jsonData = try? JSONSerialization.data(withJSONObject: json)
// create post request
var request = URLRequest(url: url)
request.httpMethod = "POST"
// insert json data to the request
request.httpBody = jsonData
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.setValue( "Bearer \(token)", forHTTPHeaderField: "Authorization")
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data, error == nil else {
print(error?.localizedDescription ?? "No data")
return
}
//TODO: Remove this once i get the response to display
let responseJSON = try? JSONSerialization.jsonObject(with: data, options: [])
if let responseJSON = responseJSON as? [String: Any] {
print(responseJSON)
}
let response = try! JSONDecoder().decode([Response].self, from: data)
DispatchQueue.main.async {
completion(response)
}
}
task.resume()
}
}
View:
Removed the unnecessary styling and other code from the below view:
#State var prompt: String = "This is some editable text..."
#State var response = [Response]()
utton(action: {GPT3TextComepletion().textCompletion(promptText: prompt, completion: {(response) in self.response = response })})
List (response){ response in
VStack{
Text(response.model)}}
However upon running the emulator and attempting the post call there seems to be an issue with how i am decoding the data and most likely how i have organized my structs, error message:
"Expected to decode Array but found a dictionary instead."
JSON:
["id": cmpl-4PCJZrxEm8YlCwFSTZlfLpnAUcMPl, "created": 1641910885, "object": text_completion, "model": davinci:2020-05-03, "choices": <__NSSingleObjectArrayI 0x6000012f1dc0>(
{
"finish_reason" = stop;
index = 0;
logprobs = "<null>";
text = "";
}
)
]
Obviously i am doing something wrong with how i am defining my struct however I have tried a number of different things with no success over the last few days.
Two main questions:
Is there an alternate way to display response of the post request without using List and making the struct identifiable?
What I am doing wrong with my structs here?
Thanks!