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#include "editor/config_loader.hpp"
#include "editor/editor_config.hpp"
#include "platform/http_client.hpp"
#include "platform/platform.hpp"
#include "coding/internal/file_data.hpp"
#include "coding/reader.hpp"
#include <exception>
#include <fstream>
#include <iterator>
#include "3party/pugixml/src/pugixml.hpp"
using namespace std;
namespace
{
using platform::HttpClient;
auto const kConfigFileName = "editor.config";
auto const kHashFileName = "editor.config.hash";
auto const kSynchroTimeout = chrono::hours(4);
auto const kRemoteHashUrl = "http://osmz.ru/mwm/editor.config.date";
auto const kRemoteConfigUrl = "http://osmz.ru/mwm/editor.config";
string GetConfigFilePath() { return GetPlatform().WritablePathForFile(kConfigFileName); }
string GetHashFilePath() { return GetPlatform().WritablePathForFile(kHashFileName); }
string RunSimpleHttpRequest(string const & url)
{
HttpClient request(url);
bool result = false;
try
{
result = request.RunHttpRequest();
}
catch (runtime_error const & ex)
{
LOG(LWARNING, ("Exception from HttpClient::RunHttpRequest, message: ", ex.what()));
}
if (result && !request.WasRedirected() && request.ErrorCode() == 200) // 200 - http status OK
{
return request.ServerResponse();
}
return {};
}
} // namespace
namespace editor
{
void Waiter::Interrupt()
{
{
lock_guard<mutex> lock(m_mutex);
m_interrupted = true;
}
m_event.notify_all();
}
ConfigLoader::ConfigLoader(base::AtomicSharedPtr<EditorConfig> & config) : m_config(config)
{
pugi::xml_document doc;
LoadFromLocal(doc);
ResetConfig(doc);
//m_loaderThread = thread(&ConfigLoader::LoadFromServer, this);
}
ConfigLoader::~ConfigLoader()
{
m_waiter.Interrupt();
//m_loaderThread.join();
}
void ConfigLoader::LoadFromServer()
{
auto const hash = LoadHash(GetHashFilePath());
try
{
do
{
auto const remoteHash = GetRemoteHash();
if (remoteHash.empty() || hash == remoteHash)
continue;
pugi::xml_document doc;
GetRemoteConfig(doc);
if (SaveAndReload(doc))
SaveHash(remoteHash, GetHashFilePath());
} while (m_waiter.Wait(kSynchroTimeout));
}
catch (RootException const & ex)
{
LOG(LERROR, (ex.Msg()));
}
}
bool ConfigLoader::SaveAndReload(pugi::xml_document const & doc)
{
if (doc.empty())
return false;
auto const filePath = GetConfigFilePath();
auto const result =
base::WriteToTempAndRenameToFile(filePath, [&doc](string const & fileName)
{
return doc.save_file(fileName.c_str(), " ");
});
if (!result)
return false;
ResetConfig(doc);
return true;
}
void ConfigLoader::ResetConfig(pugi::xml_document const & doc)
{
auto config = make_shared<EditorConfig>();
config->SetConfig(doc);
m_config.Set(config);
}
// static
void ConfigLoader::LoadFromLocal(pugi::xml_document & doc)
{
string content;
unique_ptr<ModelReader> reader;
try
{
reader = GetPlatform().GetReader(kConfigFileName);
}
catch (RootException const & ex)
{
LOG(LERROR, (ex.Msg()));
return;
}
if (reader)
reader->ReadAsString(content);
if (!doc.load_buffer(content.data(), content.size()))
{
LOG(LERROR, ("Config can not be loaded."));
doc.reset();
}
}
// static
string ConfigLoader::GetRemoteHash()
{
return RunSimpleHttpRequest(kRemoteHashUrl);
}
// static
void ConfigLoader::GetRemoteConfig(pugi::xml_document & doc)
{
auto const result = RunSimpleHttpRequest(kRemoteConfigUrl);
if (result.empty())
return;
if (!doc.load_string(result.c_str(), pugi::parse_default | pugi::parse_comments))
doc.reset();
}
// static
bool ConfigLoader::SaveHash(string const & hash, string const & filePath)
{
auto const result =
base::WriteToTempAndRenameToFile(filePath, [&hash](string const & fileName)
{
ofstream ofs(fileName, ofstream::out);
if (!ofs.is_open())
return false;
ofs.write(hash.data(), hash.size());
return true;
});
return result;
}
// static
string ConfigLoader::LoadHash(string const & filePath)
{
ifstream ifs(filePath, ifstream::in);
if (!ifs.is_open())
return {};
return {istreambuf_iterator<char>(ifs), istreambuf_iterator<char>()};
}
} // namespace editor
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