Swift / iOS Tone Checker

import Foundation
#if canImport(FoundationNetworking)
import FoundationNetworking
#endif

@main
struct Main {
  static func main() async throws {
    guard let apiKey = ProcessInfo.processInfo.environment["SAPLING_API_KEY"] else {
      throw NSError(
        domain: "Quickstart",
        code: 1,
        userInfo: [NSLocalizedDescriptionKey: "Set SAPLING_API_KEY first."]
      )
    }

    let payload: [String: Any] = [
      "text": "Really stoked about this! Will it be ready by next week?",
    ]

    var request = URLRequest(
      url: URL(string: "https://api.sapling.ai/api/v1/tone")!
    )
    request.httpMethod = "POST"
    request.setValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
    request.setValue("application/json", forHTTPHeaderField: "Content-Type")
    request.httpBody = try JSONSerialization.data(withJSONObject: payload)

    let (data, response) = try await URLSession.shared.data(for: request)
    guard let httpResponse = response as? HTTPURLResponse,
          (200..<300).contains(httpResponse.statusCode) else {
      throw NSError(domain: "SaplingAPI", code: 1)
    }

    print(String(decoding: data, as: UTF8.self))
  }
}