A non-TCA version of the transcription effect.

non_tca_transcription_effect.swift

let transcriptionEffect: (URL) -> AnyPublisher<String, NSError> = { audioURL in
	Deferred {
		Future { callback in
				guard
					let speechRecognizer = SFSpeechRecognizer(),
					speechRecognizer.isAvailable
				else {
					callback(
						.failure(
							NSError(
								domain: "com.jasdev.CaptionsGeneration",
								code: 1,
								userInfo: nil
							)
						)
					)
					return
				}

				let request = SFSpeechURLRecognitionRequest(url: audioURL)
				request.shouldReportPartialResults = false

				speechRecognizer.recognitionTask(with: request) { [weak request] result, error in
					if let error = error {
						callback(.failure(error as NSError))
					} else {
						callback(
							.success(
								transcriptionSegmentsToSubRipText(
									result!
										.bestTranscription
										.segments
								)
							)
						)
					}
				}
		}
	}
	.eraseToAnyPublisher()
}