Function tauri::api::ipc::format_callback_result

pub fn format_callback_result<T: Serialize, E: Serialize>(
    result: Result<T, E>,
    success_callback: CallbackFn,
    error_callback: CallbackFn
) -> Result<String>

Formats a Result type to its Promise response. Useful for Promises handling. If the Result is_ok(), the callback will be the success_callback function name and the argument will be the Ok value. If the Result is_err(), the callback will be the error_callback function name and the argument will be the Err value.

• result the Result to check
• success_callback the function name of the Ok callback. Usually the resolve of the JS Promise.
• error_callback the function name of the Err callback. Usually the reject of the JS Promise.

Note that the callback strings are automatically generated by the invoke helper.

Examples

use tauri::api::ipc::{CallbackFn, format_callback_result};
let res: Result<u8, &str> = Ok(5);
let cb = format_callback_result(res, CallbackFn(145), CallbackFn(0)).expect("failed to format");
assert!(cb.contains(r#"window["_145"](5)"#));

let res: Result<&str, &str> = Err("error message here");
let cb = format_callback_result(res, CallbackFn(2), CallbackFn(1)).expect("failed to format");
assert!(cb.contains(r#"window["_1"]("error message here")"#));

Examples found in repository

src/hooks.rs (line 269)

pub fn window_invoke_responder<R: Runtime>(
  window: Window<R>,
  response: InvokeResponse,
  success_callback: CallbackFn,
  error_callback: CallbackFn,
) {
  let callback_string =
    match format_callback_result(response.into_result(), success_callback, error_callback) {
      Ok(callback_string) => callback_string,
      Err(e) => format_callback(error_callback, &e.to_string())
        .expect("unable to serialize response string to json"),
    };

  let _ = window.eval(&callback_string);
}