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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
#ifndef _SDPPREF_H_
#define _SDPPREF_H_
#include "mozilla/Maybe.h"
#include "mozilla/Preferences.h"
#include <string>
#include <unordered_map>
namespace mozilla {
class SdpParser;
// Interprets about:config SDP parsing preferences
class SdpPref {
private:
static const std::string PRIMARY_PREF;
static const std::string ALTERNATE_PREF;
static const std::string STRICT_SUCCESS_PREF;
static const std::string DEFAULT;
public:
// Supported Parsers
enum class Parsers {
Sipcc,
WebRtcSdp,
};
static auto ToString(const Parsers& aParser) -> std::string;
// How is the alternate used
enum class AlternateParseModes {
Parallel, // Alternate is always run, if A succedes it is used, otherwise B
// is used
Failover, // Alternate is only run on failure of the primary to parse
Never, // Alternate is never run; this is effectively a kill switch
};
static auto ToString(const AlternateParseModes& aMode) -> std::string;
private:
// Finds the mapping between a pref string and pref value, if none exists the
// default is used
template <class T>
static auto Pref(const std::string& aPrefName,
const std::unordered_map<std::string, T>& aMap) -> T {
MOZ_ASSERT(aMap.find(DEFAULT) != aMap.end());
nsCString value;
if (NS_FAILED(Preferences::GetCString(aPrefName.c_str(), value))) {
return aMap.at(DEFAULT);
}
const auto found = aMap.find(value.get());
if (found != aMap.end()) {
return found->second;
}
return aMap.at(DEFAULT);
}
// The value of the parser pref
static auto Parser() -> Parsers;
// The value of the alternate parse mode pref
static auto AlternateParseMode() -> AlternateParseModes;
public:
// Do non-fatal parsing errors count as failure
static auto StrictSuccess() -> bool;
// Functions to create the primary, secondary and failover parsers.
// Reads about:config to choose the primary Parser
static auto Primary() -> UniquePtr<SdpParser>;
static auto Secondary() -> Maybe<UniquePtr<SdpParser>>;
static auto Failover() -> Maybe<UniquePtr<SdpParser>>;
};
} // namespace mozilla
#endif