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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_EXTENSIONS_SPEECH_SPEECH_RECOGNITION_PRIVATE_MANAGER_H_
#define CHROME_BROWSER_ASH_EXTENSIONS_SPEECH_SPEECH_RECOGNITION_PRIVATE_MANAGER_H_
#include <map>
#include <memory>
#include <optional>
#include <string>
#include "base/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "chrome/browser/ash/extensions/speech/speech_recognition_private_delegate.h"
#include "chrome/browser/speech/speech_recognition_constants.h"
#include "components/keyed_service/core/keyed_service.h"
namespace content {
class BrowserContext;
} // namespace content
namespace extensions {
class SpeechRecognitionPrivateRecognizer;
// This class implements core bookkeeping logic for the SpeechRecognitionPrivate
// API. It is responsible for routing API function calls to the correct speech
// recognizer and routing events back to the correct extension.
class SpeechRecognitionPrivateManager
: public KeyedService,
public SpeechRecognitionPrivateDelegate {
using OnStartCallback =
base::OnceCallback<void(speech::SpeechRecognitionType type,
std::optional<std::string> error)>;
using OnStopCallback =
base::OnceCallback<void(std::optional<std::string> error)>;
public:
explicit SpeechRecognitionPrivateManager(content::BrowserContext* context);
~SpeechRecognitionPrivateManager() override;
SpeechRecognitionPrivateManager(const SpeechRecognitionPrivateManager&) =
delete;
SpeechRecognitionPrivateManager& operator=(
const SpeechRecognitionPrivateManager&) = delete;
// Creates a unique ID for an API client given an extension ID and an optional
// ID, which is provided by the client.
std::string CreateKey(const std::string& extension_id,
std::optional<int> client_id);
// Handles a call to start speech recognition.
void HandleStart(const std::string& key,
std::optional<std::string> locale,
std::optional<bool> interim_results,
OnStartCallback callback);
// Handles a call to stop speech recognition.
void HandleStop(const std::string& key, OnStopCallback callback);
private:
friend class SpeechRecognitionPrivateManagerTest;
friend class SpeechRecognitionPrivateApiTest;
// SpeechRecognitionPrivateDelegate:
void HandleSpeechRecognitionStopped(const std::string& key) override;
void HandleSpeechRecognitionResult(const std::string& key,
const std::u16string& transcript,
bool is_final) override;
void HandleSpeechRecognitionError(const std::string& key,
const std::string& error) override;
// Returns the speech recognizer associated with the key. Creates one if
// none exists.
SpeechRecognitionPrivateRecognizer* GetSpeechRecognizer(
const std::string& key);
// Maps API client IDs to their speech recognizers.
std::map<std::string, std::unique_ptr<SpeechRecognitionPrivateRecognizer>>
recognition_data_;
// The browser context associated with the keyed service.
raw_ptr<content::BrowserContext> context_;
};
} // namespace extensions
#endif // CHROME_BROWSER_ASH_EXTENSIONS_SPEECH_SPEECH_RECOGNITION_PRIVATE_MANAGER_H_
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