/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2015 Daniel Vassdal <shutter@canternet.org>
* Copyright (C) 2014, 2016 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2013-2014, 2016-2017, 2019-2023 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2012, 2016 Adam <Adam@anope.org>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2012 ChrisTX <xpipe@hotmail.de>
* Copyright (C) 2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2007, 2009 Craig Edwards <brain@inspircd.org>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/// $CompilerFlags: find_compiler_flags("sqlite3")
/// $LinkerFlags: find_linker_flags("sqlite3")
/// $PackageInfo: require_system("arch") pkgconf sqlite
/// $PackageInfo: require_system("centos") pkgconfig sqlite-devel
/// $PackageInfo: require_system("darwin") pkg-config sqlite
/// $PackageInfo: require_system("debian") libsqlite3-dev pkg-config
/// $PackageInfo: require_system("rocky") pkgconfig sqlite-devel
/// $PackageInfo: require_system("ubuntu") libsqlite3-dev pkg-config
#include "inspircd.h"
#include "modules/sql.h"
#include "utility/string.h"
#include <sqlite3.h>
#ifdef _WIN32
# pragma comment(lib, "sqlite3.lib")
#endif
class SQLConn;
typedef insp::flat_map<std::string, SQLConn*> ConnMap;
class SQLite3Result final
: public SQL::Result
{
public:
int currentrow = 0;
int rows = 0;
std::vector<std::string> columns;
std::vector<SQL::Row> fieldlists;
int Rows() override
{
return rows;
}
bool GetRow(SQL::Row& result) override
{
if (currentrow < rows)
{
result.assign(fieldlists[currentrow].begin(), fieldlists[currentrow].end());
currentrow++;
return true;
}
else
{
result.clear();
return false;
}
}
void GetCols(std::vector<std::string>& result) override
{
result.assign(columns.begin(), columns.end());
}
bool HasColumn(const std::string& column, size_t& index) override
{
for (size_t i = 0; i < columns.size(); ++i)
{
if (columns[i] == column)
{
index = i;
return true;
}
}
return false;
}
};
class SQLConn final
: public SQL::Provider
{
sqlite3* conn;
std::shared_ptr<ConfigTag> config;
public:
SQLConn(Module* Parent, const std::shared_ptr<ConfigTag>& tag)
: SQL::Provider(Parent, tag->getString("id"))
, config(tag)
{
std::string host = tag->getString("hostname");
if (sqlite3_open_v2(host.c_str(), &conn, SQLITE_OPEN_READWRITE, nullptr) != SQLITE_OK)
{
// Even in case of an error conn must be closed
sqlite3_close(conn);
conn = nullptr;
ServerInstance->Logs.Critical(MODNAME, "WARNING: Could not open DB with id: " + tag->getString("id"));
}
}
~SQLConn() override
{
if (conn)
{
sqlite3_interrupt(conn);
sqlite3_close(conn);
}
}
void Query(SQL::Query* query, const std::string& q)
{
SQLite3Result res;
sqlite3_stmt* stmt;
int err = sqlite3_prepare_v2(conn, q.c_str(), static_cast<int>(q.length()), &stmt, nullptr);
if (err != SQLITE_OK)
{
SQL::Error error(SQL::QSEND_FAIL, sqlite3_errmsg(conn));
query->OnError(error);
return;
}
int cols = sqlite3_column_count(stmt);
res.columns.resize(cols);
for(int i=0; i < cols; i++)
{
res.columns[i] = sqlite3_column_name(stmt, i);
}
while (true)
{
err = sqlite3_step(stmt);
if (err == SQLITE_ROW)
{
// Add the row
res.fieldlists.resize(res.rows + 1);
res.fieldlists[res.rows].resize(cols);
for(int i=0; i < cols; i++)
{
const char* txt = (const char*)sqlite3_column_text(stmt, i);
if (txt)
res.fieldlists[res.rows][i] = txt;
}
res.rows++;
}
else if (err == SQLITE_DONE)
{
query->OnResult(res);
break;
}
else
{
SQL::Error error(SQL::QREPLY_FAIL, sqlite3_errmsg(conn));
query->OnError(error);
break;
}
}
sqlite3_finalize(stmt);
}
void Submit(SQL::Query* query, const std::string& q) override
{
ServerInstance->Logs.Debug(MODNAME, "Executing SQLite3 query: " + q);
Query(query, q);
delete query;
}
void Submit(SQL::Query* query, const std::string& q, const SQL::ParamList& p) override
{
std::string res;
unsigned int param = 0;
for (const auto chr : q)
{
if (chr != '?')
res.push_back(chr);
else
{
if (param < p.size())
{
char* escaped = sqlite3_mprintf("%q", p[param++].c_str());
res.append(escaped);
sqlite3_free(escaped);
}
}
}
Submit(query, res);
}
void Submit(SQL::Query* query, const std::string& q, const SQL::ParamMap& p) override
{
std::string res;
for(std::string::size_type i = 0; i < q.length(); i++)
{
if (q[i] != '$')
res.push_back(q[i]);
else
{
std::string field;
i++;
while (i < q.length() && isalnum(q[i]))
field.push_back(q[i++]);
i--;
SQL::ParamMap::const_iterator it = p.find(field);
if (it != p.end())
{
char* escaped = sqlite3_mprintf("%q", it->second.c_str());
res.append(escaped);
sqlite3_free(escaped);
}
}
}
Submit(query, res);
}
};
class ModuleSQLite3 final
: public Module
{
private:
ConnMap conns;
public:
ModuleSQLite3()
: Module(VF_VENDOR, "Provides the ability for SQL modules to query a SQLite 3 database.")
{
}
~ModuleSQLite3() override
{
ClearConns();
}
void init() override
{
ServerInstance->Logs.Normal(MODNAME, "Module was compiled against SQLite version {} and is running against version {}",
SQLITE_VERSION, sqlite3_libversion());
}
void ClearConns()
{
for (const auto& [_, conn] : conns)
{
ServerInstance->Modules.DelService(*conn);
delete conn;
}
conns.clear();
}
void ReadConfig(ConfigStatus& status) override
{
ClearConns();
for (const auto& [_, tag] : ServerInstance->Config->ConfTags("database"))
{
if (!insp::equalsci(tag->getString("module"), "sqlite"))
continue;
auto* conn = new SQLConn(this, tag);
conns.emplace(tag->getString("id"), conn);
ServerInstance->Modules.AddService(*conn);
}
}
};
MODULE_INIT(ModuleSQLite3)
