feat: Implement callbacks that return a value in Swift/Kotlin 🥳

[mrousavy]

This now works:

interface SomeHybrid extends HybridObject<{ }> {
  // Callbacks that return values
  getValueFromJSCallbackAndWait(getValue: () => number): Promise<number>
  getValueFromJsCallback(
    callback: () => string,
    andThenCall: (valueFromJs: string) => void
  ): Promise<void>
}

..in Swift and Kotlin:

func getValueFromJSCallbackAndWait(getValue: @escaping (() -> Promise<Double>)) throws -> Promise<Double> {
  return .async {
    let jsResult = try await getValue().await()
    return jsResult
  }
}

func getValueFromJsCallback(callback: @escaping (() -> Promise<String>),
                            andThenCall: @escaping ((_ valueFromJs: String) -> Void)) throws -> Promise<Void> {
  return .async {
    let jsResult = try await callback().await()
    andThenCall(jsResult)
  }
}

..and the tests for it.

[vercel]

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1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
nitro-docs	⬜️ Skipped (Inspect)			Dec 10, 2024 3:27pm