translate method

Future<String> translate(String original_text)

Implementation

Future<String> translate(String original_text) async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  if (prefs.getString("target_language") == null)
    prefs.setString("target_language", "en");
  String target_language = prefs.getString("target_language") ?? "en";

  if (target_language == "en") {
    print("return translation from original text");
    return original_text;
  } else {
    if (prefs.getString(
            "translated_text_$original_text\_target_$target_language") !=
        null) {
      print("return translation from local storage");
      return prefs.getString(
          "translated_text_$original_text\_target_$target_language")!;
    } else {
      try {
        String api_key =
            await get_api_key(name: "translation", organization: "gcp");

        String url =
            'https://translation.googleapis.com/language/translate/v2?source=en&target=$target_language&key=$api_key&q=$original_text&format=text';

        Response response = await get(
          Uri.parse(url),
          headers: await headers_api_request(),
        );
        Map<String, dynamic> body = jsonDecode(response.body);
        //print("response ${response.body}");

        if (body["error"] == null) {
          var result = body['data']['translations'][0]['translatedText'];

          prefs.setString(
              "translated_text_$original_text\_target_$target_language",
              result);
          print("return translation from api");
          return result;
        } else {
          print("return translation from original text");
          return original_text;
        }
      } catch (error) {
        print(error);
        return original_text;
      }
    }
  }
}