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database.cpp
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database.cpp
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#include "database.hpp"
#include <algorithm>
#include <exception>
#include <stdexcept>
Table *Database::find(const std::string &name)
{
std::vector<Table>::iterator result = std::find_if(std::begin(tables), std::end(tables), [name](const Table &table)
{ return table.getName() == name; });
if (result != std::end(tables))
{
return &(*(result));
}
return nullptr;
}
void Database::import(const std::string &filename)
{
Table table(filename);
table.deserialize();
for (size_t i = 0; i < tables.size(); i++)
{
if (tables[i].getName() == table.getName())
{
throw std::runtime_error("A table with this name already exists!");
}
}
tables.push_back(table);
}
std::ostream &Database::serialize(std::ostream &os) const
{
os << tables.size() << '\n';
for (size_t i = 0; i < tables.size(); i++)
{
os << tables[i].getName() << '\n'
<< tables[i].getFilename() << '\n';
tables[i].serialize();
}
return os;
}
std::istream &Database::deserialize(std::istream &is)
{
size_t size = 0;
is >> size;
is.ignore();
for (size_t i = 0; i < size; i++)
{
std::string name;
std::getline(is, name);
std::string filename;
std::getline(is, filename);
Table t(filename, name);
tables.push_back(t);
tables[i].deserialize();
if (tables[i].getFilename().find("recovery-") != std::string::npos)
{
tables[i].changeFilename(filename.erase(0, 9));
}
}
return is;
}
const Table &Database::operator[](size_t index) const
{
if (index < 0 || index > tables.size() - 1)
{
throw std::runtime_error("Invalid index!");
}
return tables[index];
}
std::ostream &Database::serializeWithRecovery(std::ostream &os) const
{
os << tables.size() << '\n';
for (size_t i = 0; i < tables.size(); i++)
{
os << tables[i].getName() << '\n'
<< "recovery-" + tables[i].getFilename() << '\n';
}
return os;
}