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#include "string_storage_base.hpp"
#include "coding/reader_streambuf.hpp"
#include "coding/file_reader.hpp"
#include "coding/file_writer.hpp"
#include "base/exception.hpp"
#include "base/logging.hpp"
#include "base/stl_helpers.hpp"
#include <istream>
using namespace std;
namespace
{
constexpr char kDelimChar = '=';
} // namespace
namespace platform
{
StringStorageBase::StringStorageBase(string const & path) : m_path(path)
{
try
{
LOG(LINFO, ("Settings path:", m_path));
ReaderStreamBuf buffer(make_unique<FileReader>(m_path));
istream stream(&buffer);
string line;
while (getline(stream, line))
{
if (line.empty())
continue;
size_t const delimPos = line.find(kDelimChar);
if (delimPos == string::npos)
continue;
string const key = line.substr(0, delimPos);
string const value = line.substr(delimPos + 1);
if (!key.empty() && !value.empty())
m_values[key] = value;
}
}
catch (RootException const & ex)
{
LOG(LWARNING, ("Loading settings:", ex.Msg()));
}
}
void StringStorageBase::Save() const
{
try
{
FileWriter file(m_path);
for (auto const & value : m_values)
{
string line(value.first);
line += kDelimChar;
line += value.second;
line += '\n';
file.Write(line.data(), line.size());
}
}
catch (RootException const & ex)
{
// Ignore all settings saving exceptions.
LOG(LWARNING, ("Saving settings:", ex.Msg()));
}
}
void StringStorageBase::Clear()
{
lock_guard<mutex> guard(m_mutex);
m_values.clear();
Save();
}
bool StringStorageBase::GetValue(string const & key, string & outValue) const
{
lock_guard<mutex> guard(m_mutex);
auto const found = m_values.find(key);
if (found == m_values.end())
return false;
outValue = found->second;
return true;
}
void StringStorageBase::SetValue(string const & key, string && value)
{
lock_guard<mutex> guard(m_mutex);
m_values[key] = move(value);
Save();
}
void StringStorageBase::DeleteKeyAndValue(string const & key)
{
lock_guard<mutex> guard(m_mutex);
auto const found = m_values.find(key);
if (found != m_values.end())
{
m_values.erase(found);
Save();
}
}
} // namespace platform
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