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// Copyright 2017 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_MEDIA_ROUTER_DISCOVERY_DIAL_SAFE_DIAL_APP_INFO_PARSER_H_
#define CHROME_BROWSER_MEDIA_ROUTER_DISCOVERY_DIAL_SAFE_DIAL_APP_INFO_PARSER_H_
#include <memory>
#include <string>
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/media/router/discovery/dial/parsed_dial_app_info.h"
#include "services/data_decoder/public/cpp/data_decoder.h"
namespace media_router {
// SafeDialAppInfoParser parses the given app info XML file safely via a utility
// process.
// Spec for DIAL app info XML:
// http://www.dial-multiscreen.org/dial-protocol-specification
// Section 6.1.2 Server response.
class SafeDialAppInfoParser {
public:
enum ParsingResult {
kSuccess = 0,
kInvalidXML = 1,
kFailToReadName = 2,
kFailToReadState = 3,
kMissingName = 4,
kInvalidState = 5
};
SafeDialAppInfoParser();
SafeDialAppInfoParser(const SafeDialAppInfoParser&) = delete;
SafeDialAppInfoParser& operator=(const SafeDialAppInfoParser&) = delete;
virtual ~SafeDialAppInfoParser();
// Callback function invoked when done parsing DIAL app info XML.
// |app_info|: app info object. Empty if parsing failed.
// |parsing_error|: error encountered while parsing the DIAL app info XML.
using ParseCallback =
base::OnceCallback<void(std::unique_ptr<ParsedDialAppInfo> app_info,
ParsingResult parsing_result)>;
// Parses the DIAL app info in |xml_text| in a utility process.
// If the parsing succeeds, invokes callback with a valid
// |app_info|, otherwise invokes callback with an empty
// |app_info| and sets parsing error to detail the failure.
// Note that it's safe to call this method multiple times and when making
// multiple calls they may be grouped in the same utility process. The
// utility process is still cleaned up automatically if unused after some
// time, even if this object is still alive.
// Note also that the callback is not called if the object is deleted.
virtual void Parse(const std::string& xml_text, ParseCallback callback);
private:
void OnXmlParsingDone(ParseCallback callback,
data_decoder::DataDecoder::ValueOrError result);
base::WeakPtrFactory<SafeDialAppInfoParser> weak_factory_{this};
};
} // namespace media_router
#endif // CHROME_BROWSER_MEDIA_ROUTER_DISCOVERY_DIAL_SAFE_DIAL_APP_INFO_PARSER_H_
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