Implement our own database ORM, and update the whole code to use it

Entirely replace LiteSQL

fix #3271

src/database/column.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <cstdint>
+
+template <typename T>
+struct Column
+{
+    using real_type = T;
+    T value;
+};
+
+struct Id: Column<std::size_t> { static constexpr auto name = "id_";
+                                 static constexpr auto options = "PRIMARY KEY AUTOINCREMENT"; };

src/database/count_query.hpp

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <database/query.hpp>
+#include <database/table.hpp>
+
+#include <string>
+
+#include <sqlite3.h>
+
+struct CountQuery: public Query
+{
+    CountQuery(std::string name):
+        Query("SELECT count(*) FROM ")
+    {
+      this->body += std::move(name);
+    }
+
+    std::size_t execute(sqlite3* db)
+    {
+      auto statement = this->prepare(db);
+      std::size_t res = 0;
+      if (sqlite3_step(statement) == SQLITE_ROW)
+        res = sqlite3_column_int64(statement, 0);
+      else
+        {
+          log_error("Count request didn’t return a result");
+          return 0;
+        }
+      if (sqlite3_step(statement) != SQLITE_DONE)
+        log_warning("Count request returned more than one result.");
+
+      log_debug("Returning count: ", res);
+      return res;
+    }
+};

src/database/database.cpp

@@ -2,175 +2,166 @@
 #ifdef USE_DATABASE
 
 #include <database/database.hpp>
-#include <logger/logger.hpp>
-#include <irc/iid.hpp>
 #include <uuid/uuid.h>
 #include <utils/get_first_non_empty.hpp>
 #include <utils/time.hpp>
 
-using namespace std::string_literals;
+#include <sqlite3.h>
 
-std::unique_ptr<db::BibouDB> Database::db;
+sqlite3* Database::db;
+Database::MucLogLineTable Database::muc_log_lines("MucLogLine_");
+Database::GlobalOptionsTable Database::global_options("GlobalOptions_");
+Database::IrcServerOptionsTable Database::irc_server_options("IrcServerOptions_");
+Database::IrcChannelOptionsTable Database::irc_channel_options("IrcChannelOptions_");
 
-void Database::open(const std::string& filename, const std::string& db_type)
+void Database::open(const std::string& filename)
 {
-  try
+  auto res = sqlite3_open_v2(filename.data(), &Database::db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, nullptr);
+  log_debug("open: ", res);
+  Database::muc_log_lines.create(Database::db);
+  Database::global_options.create(Database::db);
+  Database::irc_server_options.create(Database::db);
+  Database::irc_channel_options.create(Database::db);
+}
+
+
+Database::GlobalOptions Database::get_global_options(const std::string& owner)
+{
+  auto request = Database::global_options.select().where() << Owner{} << "=" << owner;
+
+  Database::GlobalOptions options{Database::global_options.get_name()};
+  auto result = request.execute(Database::db);
+  if (result.size() == 1)
+    options = result.front();
+  else
+    options.col<Owner>() = owner;
+  return options;
+}
+
+Database::IrcServerOptions Database::get_irc_server_options(const std::string& owner, const std::string& server)
+{
+  auto request = Database::irc_server_options.select().where() << Owner{} << "=" << owner << " and " << Server{} << "=" << server;
+
+  Database::IrcServerOptions options{Database::irc_server_options.get_name()};
+  auto result = request.execute(Database::db);
+  if (result.size() == 1)
+    options = result.front();
+  else
     {
-      auto new_db = std::make_unique<db::BibouDB>(db_type,
-                                             "database="s + filename);
-      if (new_db->needsUpgrade())
-        new_db->upgrade();
-      Database::db = std::move(new_db);
-    } catch (const litesql::DatabaseError& e) {
-      log_error("Failed to open database ", filename, ". ", e.what());
-      throw;
+      options.col<Owner>() = owner;
+      options.col<Server>() = server;
     }
+  return options;
 }
 
-void Database::set_verbose(const bool val)
+Database::IrcChannelOptions Database::get_irc_channel_options(const std::string& owner, const std::string& server, const std::string& channel)
 {
-  Database::db->verbose = val;
+  auto request = Database::irc_channel_options.select().where() << Owner{} << "=" << owner <<\
+                                                        " and " << Server{} << "=" << server <<\
+                                                        " and " << Channel{} << "=" << channel;
+  Database::IrcChannelOptions options{Database::irc_channel_options.get_name()};
+  auto result = request.execute(Database::db);
+  if (result.size() == 1)
+    options = result.front();
+  else
+    {
+      options.col<Owner>() = owner;
+      options.col<Server>() = server;
+      options.col<Channel>() = channel;
+    }
+  return options;
 }
 
-db::GlobalOptions Database::get_global_options(const std::string& owner)
-{
-  try {
-    auto options = litesql::select<db::GlobalOptions>(*Database::db,
-                                                      db::GlobalOptions::Owner == owner).one();
-    return options;
-  } catch (const litesql::NotFound& e) {
-    db::GlobalOptions options(*Database::db);
-    options.owner = owner;
-    return options;
-  }
-}
-
-db::IrcServerOptions Database::get_irc_server_options(const std::string& owner,
-                                                      const std::string& server)
-{
-  try {
-    auto options = litesql::select<db::IrcServerOptions>(*Database::db,
-                             db::IrcServerOptions::Owner == owner &&
-                             db::IrcServerOptions::Server == server).one();
-    return options;
-  } catch (const litesql::NotFound& e) {
-    db::IrcServerOptions options(*Database::db);
-    options.owner = owner;
-    options.server = server;
-    // options.update();
-    return options;
-  }
-}
-
-db::IrcChannelOptions Database::get_irc_channel_options(const std::string& owner,
-                                                        const std::string& server,
-                                                        const std::string& channel)
-{
-  try {
-    auto options = litesql::select<db::IrcChannelOptions>(*Database::db,
-                                                         db::IrcChannelOptions::Owner == owner &&
-                                                         db::IrcChannelOptions::Server == server &&
-                                                         db::IrcChannelOptions::Channel == channel).one();
-    return options;
-  } catch (const litesql::NotFound& e) {
-    db::IrcChannelOptions options(*Database::db);
-    options.owner = owner;
-    options.server = server;
-    options.channel = channel;
-    return options;
-  }
-}
-
-db::IrcChannelOptions Database::get_irc_channel_options_with_server_default(const std::string& owner,
-                                                                            const std::string& server,
-                                                                            const std::string& channel)
+Database::IrcChannelOptions Database::get_irc_channel_options_with_server_default(const std::string& owner, const std::string& server,
+                                                                                  const std::string& channel)
 {
   auto coptions = Database::get_irc_channel_options(owner, server, channel);
   auto soptions = Database::get_irc_server_options(owner, server);
 
-  coptions.encodingIn = get_first_non_empty(coptions.encodingIn.value(),
-                                            soptions.encodingIn.value());
-  coptions.encodingOut = get_first_non_empty(coptions.encodingOut.value(),
-                                             soptions.encodingOut.value());
+  coptions.col<EncodingIn>() = get_first_non_empty(coptions.col<EncodingIn>(),
+                                                   soptions.col<EncodingIn>());
+  coptions.col<EncodingOut>() = get_first_non_empty(coptions.col<EncodingOut>(),
+                                                    soptions.col<EncodingOut>());
 
-  coptions.maxHistoryLength = get_first_non_empty(coptions.maxHistoryLength.value(),
-                                                  soptions.maxHistoryLength.value());
+  coptions.col<MaxHistoryLength>() = get_first_non_empty(coptions.col<MaxHistoryLength>(),
+                                                         soptions.col<MaxHistoryLength>());
 
   return coptions;
 }
 
-db::IrcChannelOptions Database::get_irc_channel_options_with_server_and_global_default(const std::string& owner,
-                                                                                       const std::string& server,
-                                                                                       const std::string& channel)
+Database::IrcChannelOptions Database::get_irc_channel_options_with_server_and_global_default(const std::string& owner, const std::string& server, const std::string& channel)
 {
   auto coptions = Database::get_irc_channel_options(owner, server, channel);
   auto soptions = Database::get_irc_server_options(owner, server);
   auto goptions = Database::get_global_options(owner);
 
-  coptions.encodingIn = get_first_non_empty(coptions.encodingIn.value(),
-                                            soptions.encodingIn.value());
-  coptions.encodingOut = get_first_non_empty(coptions.encodingOut.value(),
-                                             soptions.encodingOut.value());
+  coptions.col<EncodingIn>() = get_first_non_empty(coptions.col<EncodingIn>(),
+                                                   soptions.col<EncodingIn>());
 
-  coptions.maxHistoryLength = get_first_non_empty(coptions.maxHistoryLength.value(),
-                                                  soptions.maxHistoryLength.value(),
-                                                  goptions.maxHistoryLength.value());
+  coptions.col<EncodingOut>() = get_first_non_empty(coptions.col<EncodingOut>(),
+                                                    soptions.col<EncodingOut>());
+
+  coptions.col<MaxHistoryLength>() = get_first_non_empty(coptions.col<MaxHistoryLength>(),
+                                                         soptions.col<MaxHistoryLength>(),
+                                                         goptions.col<MaxHistoryLength>());
 
   return coptions;
 }
 
-std::string Database::store_muc_message(const std::string& owner, const Iid& iid,
-                                        Database::time_point date,
-                                        const std::string& body,
-                                        const std::string& nick)
+std::string Database::store_muc_message(const std::string& owner, const std::string& chan_name,
+                                        const std::string& server_name, Database::time_point date,
+                                        const std::string& body, const std::string& nick)
 {
-  db::MucLogLine line(*Database::db);
+  auto line = Database::muc_log_lines.row();
 
   auto uuid = Database::gen_uuid();
 
-  line.uuid = uuid;
-  line.owner = owner;
-  line.ircChanName = iid.get_local();
-  line.ircServerName = iid.get_server();
-  line.date = std::chrono::duration_cast<std::chrono::seconds>(date.time_since_epoch()).count();
-  line.body = body;
-  line.nick = nick;
+  line.col<Uuid>() = uuid;
+  line.col<Owner>() = owner;
+  line.col<IrcChanName>() = chan_name;
+  line.col<IrcServerName>() = server_name;
+  line.col<Date>() = std::chrono::duration_cast<std::chrono::seconds>(date.time_since_epoch()).count();
+  line.col<Body>() = body;
+  line.col<Nick>() = nick;
 
-  line.update();
+  line.save(Database::db);
 
   return uuid;
 }
 
-std::vector<db::MucLogLine> Database::get_muc_logs(const std::string& owner, const std::string& chan_name, const std::string& server,
+std::vector<Database::MucLogLine> Database::get_muc_logs(const std::string& owner, const std::string& chan_name, const std::string& server,
                                                    int limit, const std::string& start, const std::string& end)
 {
-  auto request = litesql::select<db::MucLogLine>(*Database::db,
-                                              db::MucLogLine::Owner == owner &&
-                                              db::MucLogLine::IrcChanName == chan_name &&
-                                              db::MucLogLine::IrcServerName == server);
-  request.orderBy(db::MucLogLine::Id, false);
+  auto request = Database::muc_log_lines.select().where() << Database::Owner{} << "=" << owner << \
+                                            " and " << Database::IrcChanName{} << "=" << chan_name << \
+                                            " and " << Database::IrcServerName{} << "=" << server;
 
-  if (limit >= 0)
-    request.limit(limit);
   if (!start.empty())
     {
       const auto start_time = utils::parse_datetime(start);
       if (start_time != -1)
-        request.where(db::MucLogLine::Date >= start_time);
+        request << " and " << Database::Date{} << ">=" << start_time;
     }
   if (!end.empty())
     {
       const auto end_time = utils::parse_datetime(end);
       if (end_time != -1)
-        request.where(db::MucLogLine::Date <= end_time);
+        request << " and " << Database::Date{} << "<=" << end_time;
     }
-  const auto& res = request.all();
-  return {res.crbegin(), res.crend()};
+
+  request.order_by() << Id{} << " DESC ";
+
+  if (limit >= 0)
+    request.limit() << limit;
+
+  auto result = request.execute(Database::db);
+
+  return {result.crbegin(), result.crend()};
 }
 
 void Database::close()
 {
-  Database::db.reset(nullptr);
+  sqlite3_close_v2(Database::db);
 }
 
 std::string Database::gen_uuid()
@@ -182,5 +173,4 @@ std::string Database::gen_uuid()
   return uuid_str;
 }
 
-
-#endif
+#endif

src/database/database.hpp

@@ -1,22 +1,101 @@
 #pragma once
 
-
 #include <biboumi.h>
 #ifdef USE_DATABASE
 
-#include "biboudb.hpp"
+#include <database/table.hpp>
+#include <database/column.hpp>
+#include <database/count_query.hpp>
+
+#include <chrono>
+#include <string>
 
 #include <memory>
 
-#include <litesql.hpp>
-#include <chrono>
-
-class Iid;
 
 class Database
 {
-public:
+ public:
   using time_point = std::chrono::system_clock::time_point;
+
+  struct Uuid: Column<std::string> { static constexpr auto name = "uuid_";
+    static constexpr auto options = ""; };
+
+  struct Owner: Column<std::string> { static constexpr auto name = "owner_";
+    static constexpr auto options = ""; };
+
+  struct IrcChanName: Column<std::string> { static constexpr auto name = "ircChanName_";
+    static constexpr auto options = ""; };
+
+  struct Channel: Column<std::string> { static constexpr auto name = "channel_";
+    static constexpr auto options = ""; };
+
+  struct IrcServerName: Column<std::string> { static constexpr auto name = "ircServerName_";
+    static constexpr auto options = ""; };
+
+  struct Server: Column<std::string> { static constexpr auto name = "server_";
+    static constexpr auto options = ""; };
+
+  struct Date: Column<time_point::rep> { static constexpr auto name = "date_";
+    static constexpr auto options = ""; };
+
+  struct Body: Column<std::string> { static constexpr auto name = "body_";
+    static constexpr auto options = ""; };
+
+  struct Nick: Column<std::string> { static constexpr auto name = "nick_";
+    static constexpr auto options = ""; };
+
+  struct Pass: Column<std::string> { static constexpr auto name = "pass_";
+    static constexpr auto options = ""; };
+
+  struct Ports: Column<std::string> { static constexpr auto name = "tlsPorts_";
+    static constexpr auto options = ""; };
+
+  struct TlsPorts: Column<std::string> { static constexpr auto name = "ports_";
+    static constexpr auto options = ""; };
+
+  struct Username: Column<std::string> { static constexpr auto name = "username_";
+    static constexpr auto options = ""; };
+
+  struct Realname: Column<std::string> { static constexpr auto name = "realname_";
+    static constexpr auto options = ""; };
+
+  struct AfterConnectionCommand: Column<std::string> { static constexpr auto name = "afterConnectionCommand_";
+    static constexpr auto options = ""; };
+
+  struct TrustedFingerprint: Column<std::string> { static constexpr auto name = "trustedFingerprint_";
+    static constexpr auto options = ""; };
+
+  struct EncodingOut: Column<std::string> { static constexpr auto name = "encodingOut_";
+    static constexpr auto options = ""; };
+
+  struct EncodingIn: Column<std::string> { static constexpr auto name = "encodingIn_";
+    static constexpr auto options = ""; };
+
+  struct MaxHistoryLength: Column<int> { static constexpr auto name = "maxHistoryLength_";
+    static constexpr auto options = ""; };
+
+  struct RecordHistory: Column<bool> { static constexpr auto name = "recordHistory_";
+    static constexpr auto options = ""; };
+
+  struct VerifyCert: Column<bool> { static constexpr auto name = "verifyCert_";
+    static constexpr auto options = ""; };
+
+  struct Persistent: Column<bool> { static constexpr auto name = "persistent_";
+    static constexpr auto options = ""; };
+
+  using MucLogLineTable = Table<Id, Uuid, Owner, IrcChanName, IrcServerName, Date, Body, Nick>;
+  using MucLogLine = MucLogLineTable::RowType;
+
+  using GlobalOptionsTable = Table<Id, Owner, MaxHistoryLength, RecordHistory>;
+  using GlobalOptions = GlobalOptionsTable::RowType;
+
+  using IrcServerOptionsTable = Table<Id, Owner, Server, Pass, AfterConnectionCommand, TlsPorts, Ports, Username, Realname, VerifyCert, TrustedFingerprint, EncodingOut, EncodingIn, MaxHistoryLength>;
+  using IrcServerOptions = IrcServerOptionsTable::RowType;
+
+  using IrcChannelOptionsTable = Table<Id, Owner, Server, Channel, EncodingOut, EncodingIn, MaxHistoryLength, Persistent>;
+  using IrcChannelOptions = IrcChannelOptionsTable::RowType;
+
   Database() = default;
   ~Database() = default;
 
@@ -25,42 +104,40 @@ public:
   Database& operator=(const Database&) = delete;
   Database& operator=(Database&&) = delete;
 
-  static void set_verbose(const bool val);
-
-  template<typename PersistentType>
-  static size_t count()
-  {
-    return litesql::select<PersistentType>(*Database::db).count();
-  }
-  /**
-   * Return the object from the db. Create it beforehand (with all default
-   * values) if it is not already present.
-   */
-  static db::GlobalOptions get_global_options(const std::string& owner);
-  static db::IrcServerOptions get_irc_server_options(const std::string& owner,
+  static GlobalOptions get_global_options(const std::string& owner);
+  static IrcServerOptions get_irc_server_options(const std::string& owner,
                                                      const std::string& server);
-  static db::IrcChannelOptions get_irc_channel_options(const std::string& owner,
-                                                       const std::string& server,
-                                                       const std::string& channel);
-  static db::IrcChannelOptions get_irc_channel_options_with_server_default(const std::string& owner,
-                                                                           const std::string& server,
-                                                                           const std::string& channel);
-  static db::IrcChannelOptions get_irc_channel_options_with_server_and_global_default(const std::string& owner,
-                                                                                      const std::string& server,
-                                                                                      const std::string& channel);
-  static std::vector<db::MucLogLine> get_muc_logs(const std::string& owner, const std::string& chan_name, const std::string& server,
-                                                  int limit=-1, const std::string& start="", const std::string& end="");
-  static std::string store_muc_message(const std::string& owner, const Iid& iid,
-                                time_point date, const std::string& body, const std::string& nick);
+  static IrcChannelOptions get_irc_channel_options(const std::string& owner,
+                                                   const std::string& server,
+                                                   const std::string& channel);
+  static IrcChannelOptions get_irc_channel_options_with_server_default(const std::string& owner,
+                                                                       const std::string& server,
+                                                                       const std::string& channel);
+  static IrcChannelOptions get_irc_channel_options_with_server_and_global_default(const std::string& owner,
+                                                                                  const std::string& server,
+                                                                                  const std::string& channel);
+  static std::vector<MucLogLine> get_muc_logs(const std::string& owner, const std::string& chan_name, const std::string& server,
+                                              int limit=-1, const std::string& start="", const std::string& end="");
+  static std::string store_muc_message(const std::string& owner, const std::string& chan_name, const std::string& server_name,
+                                       time_point date, const std::string& body, const std::string& nick);
 
   static void close();
-  static void open(const std::string& filename, const std::string& db_type="sqlite3");
+  static void open(const std::string& filename);
 
+  template <typename TableType>
+  static std::size_t count(const TableType& table)
+  {
+    CountQuery query{table.get_name()};
+    return query.execute(Database::db);
+  }
 
-private:
+  static MucLogLineTable muc_log_lines;
+  static GlobalOptionsTable global_options;
+  static IrcServerOptionsTable irc_server_options;
+  static IrcChannelOptionsTable irc_channel_options;
+  static sqlite3* db;
+
+ private:
   static std::string gen_uuid();
-  static std::unique_ptr<db::BibouDB> db;
 };
 #endif /* USE_DATABASE */
-
-

src/database/insert_query.hpp

@@ -0,0 +1,128 @@
+#pragma once
+
+#include <database/column.hpp>
+#include <database/query.hpp>
+#include <logger/logger.hpp>
+
+#include <type_traits>
+#include <vector>
+#include <string>
+#include <tuple>
+
+#include <sqlite3.h>
+
+template <int N, typename ColumnType, typename... T>
+typename std::enable_if<!std::is_same<std::decay_t<ColumnType>, Id>::value, void>::type
+actual_bind(sqlite3_stmt* statement, std::vector<std::string>& params, const std::tuple<T...>&)
+{
+  const auto value = params.front();
+  params.erase(params.begin());
+  if (sqlite3_bind_text(statement, N + 1, value.data(), static_cast<int>(value.size()), SQLITE_TRANSIENT) != SQLITE_OK)
+    log_error("Failed to bind ", value, " to param ", N);
+  else
+    log_debug("Bound (not id) [", value, "] to ", N);
+}
+
+template <int N, typename ColumnType, typename... T>
+typename std::enable_if<std::is_same<std::decay_t<ColumnType>, Id>::value, void>::type
+actual_bind(sqlite3_stmt* statement, std::vector<std::string>&, const std::tuple<T...>& columns)
+{
+  auto&& column = std::get<Id>(columns);
+  if (column.value != 0)
+    {
+      if (sqlite3_bind_int64(statement, N + 1, column.value) != SQLITE_OK)
+        log_error("Failed to bind ", column.value, " to id.");
+    }
+  else if (sqlite3_bind_null(statement, N + 1) != SQLITE_OK)
+    log_error("Failed to bind NULL to param ", N);
+  else
+    log_debug("Bound NULL to ", N);
+}
+
+struct InsertQuery: public Query
+{
+  InsertQuery(const std::string& name):
+      Query("INSERT OR REPLACE INTO ")
+  {
+    this->body += name;
+  }
+
+  template <typename... T>
+  void execute(const std::tuple<T...>& columns, sqlite3* db)
+  {
+    auto statement = this->prepare(db);
+    {
+      this->bind_param<0>(columns, statement);
+      if (sqlite3_step(statement) != SQLITE_DONE)
+        log_error("Failed to execute query: ", sqlite3_errmsg(db));
+    }
+  }
+
+  template <int N, typename... T>
+  typename std::enable_if<N < sizeof...(T), void>::type
+  bind_param(const std::tuple<T...>& columns, sqlite3_stmt* statement)
+  {
+    using ColumnType = typename std::remove_reference<decltype(std::get<N>(columns))>::type;
+
+    actual_bind<N, ColumnType>(statement, this->params, columns);
+    this->bind_param<N+1>(columns, statement);
+  }
+
+  template <int N, typename... T>
+  typename std::enable_if<N == sizeof...(T), void>::type
+  bind_param(const std::tuple<T...>&, sqlite3_stmt*)
+  {}
+
+  template <typename... T>
+  void insert_values(const std::tuple<T...>& columns)
+  {
+    this->body += "VALUES (";
+    this->insert_value<0>(columns);
+    this->body += ")";
+  }
+
+  template <int N, typename... T>
+  typename std::enable_if<N < sizeof...(T), void>::type
+  insert_value(const std::tuple<T...>& columns)
+  {
+    this->body += "?";
+    if (N != sizeof...(T) - 1)
+      this->body += ",";
+    this->body += " ";
+    add_param(*this, std::get<N>(columns));
+    this->insert_value<N+1>(columns);
+  }
+  template <int N, typename... T>
+  typename std::enable_if<N == sizeof...(T), void>::type
+  insert_value(const std::tuple<T...>&)
+  { }
+
+  template <typename... T>
+  void insert_col_names(const std::tuple<T...>& columns)
+  {
+    this->body += " (";
+    this->insert_col_name<0>(columns);
+    this->body += ")\n";
+  }
+
+  template <int N, typename... T>
+  typename std::enable_if<N < sizeof...(T), void>::type
+  insert_col_name(const std::tuple<T...>& columns)
+  {
+    auto value = std::get<N>(columns);
+
+    this->body += value.name;
+
+    if (N < (sizeof...(T) - 1))
+      this->body += ", ";
+
+    this->insert_col_name<N+1>(columns);
+  }
+  template <int N, typename... T>
+  typename std::enable_if<N == sizeof...(T), void>::type
+  insert_col_name(const std::tuple<T...>&)
+  {}
+
+
+ private:
+};

src/database/query.cpp

@@ -0,0 +1,11 @@
+#include <database/query.hpp>
+#include <database/column.hpp>
+
+template <>
+void add_param<Id>(Query&, const Id&)
+{}
+
+void actual_add_param(Query& query, const std::string& val)
+{
+  query.params.push_back(val);
+}

src/database/query.hpp

@@ -0,0 +1,46 @@
+#pragma once
+
+#include <logger/logger.hpp>
+
+#include <vector>
+#include <string>
+
+#include <sqlite3.h>
+
+struct Query
+{
+    std::string body;
+    std::vector<std::string> params;
+
+    Query(std::string str):
+        body(std::move(str))
+    {}
+
+    sqlite3_stmt* prepare(sqlite3* db)
+    {
+      sqlite3_stmt* statement;
+      log_debug(this->body);
+      auto res = sqlite3_prepare(db, this->body.data(), static_cast<int>(this->body.size()) + 1,
+                                 &statement, nullptr);
+      if (res != SQLITE_OK)
+        {
+          log_error("Error preparing statement: ", sqlite3_errmsg(db));
+          return nullptr;
+        }
+      return statement;
+    }
+};
+
+template <typename ColumnType>
+void add_param(Query& query, const ColumnType& column)
+{
+  actual_add_param(query, column.value);
+}
+
+template <typename T>
+void actual_add_param(Query& query, const T& val)
+{
+  query.params.push_back(std::to_string(val));
+}
+
+void actual_add_param(Query& query, const std::string& val);

src/database/row.hpp

@@ -0,0 +1,75 @@
+#pragma once
+
+#include <database/insert_query.hpp>
+#include <logger/logger.hpp>
+
+#include <type_traits>
+
+#include <sqlite3.h>
+
+template <typename ColumnType, typename... T>
+typename std::enable_if<!std::is_same<std::decay_t<ColumnType>, Id>::value, void>::type
+update_id(std::tuple<T...>&, sqlite3*)
+{}
+
+template <typename ColumnType, typename... T>
+typename std::enable_if<std::is_same<std::decay_t<ColumnType>, Id>::value, void>::type
+update_id(std::tuple<T...>& columns, sqlite3* db)
+{
+  auto&& column = std::get<ColumnType>(columns);
+  log_debug("Found an autoincrement col.");
+  auto res = sqlite3_last_insert_rowid(db);
+  log_debug("Value is now: ", res);
+  column.value = res;
+}
+
+template <std::size_t N, typename... T>
+typename std::enable_if<N < sizeof...(T), void>::type
+update_autoincrement_id(std::tuple<T...>& columns, sqlite3* db)
+{
+  using ColumnType = typename std::remove_reference<decltype(std::get<N>(columns))>::type;
+  update_id<ColumnType>(columns, db);
+  update_autoincrement_id<N+1>(columns, db);
+}
+
+template <std::size_t N, typename... T>
+typename std::enable_if<N == sizeof...(T), void>::type
+update_autoincrement_id(std::tuple<T...>&, sqlite3*)
+{}
+
+template <typename... T>
+struct Row
+{
+    Row(std::string name):
+    table_name(std::move(name))
+    {}
+
+    template <typename Type>
+    auto& col()
+    {
+      auto&& col = std::get<Type>(this->columns);
+      return col.value;
+    }
+
+    template <typename Type>
+    const auto& col() const
+    {
+      auto&& col = std::get<Type>(this->columns);
+      return col.value;
+    }
+
+    void save(sqlite3* db)
+    {
+      InsertQuery query(this->table_name);
+      query.insert_col_names(this->columns);
+      query.insert_values(this->columns);
+      log_debug(query.body);
+
+      query.execute(this->columns, db);
+
+      update_autoincrement_id<0>(this->columns, db);
+    }
+
+    std::tuple<T...> columns;
+    std::string table_name;
+};

src/database/select_query.hpp

@@ -0,0 +1,153 @@
+#pragma once
+
+#include <database/query.hpp>
+#include <logger/logger.hpp>
+#include <database/row.hpp>
+
+#include <vector>
+#include <string>
+
+#include <sqlite3.h>
+
+using namespace std::string_literals;
+
+template <typename T>
+typename std::enable_if<std::is_integral<T>::value, sqlite3_int64>::type
+extract_row_value(sqlite3_stmt* statement, const int i)
+{
+  return sqlite3_column_int64(statement, i);
+}
+
+template <typename T>
+typename std::enable_if<std::is_same<std::string, T>::value, std::string>::type
+extract_row_value(sqlite3_stmt* statement, const int i)
+{
+  const auto size = sqlite3_column_bytes(statement, i);
+  const unsigned char* str = sqlite3_column_text(statement, i);
+  std::string result(reinterpret_cast<const char*>(str), size);
+  return result;
+}
+
+template <std::size_t N=0, typename... T>
+typename std::enable_if<N < sizeof...(T), void>::type
+extract_row_values(Row<T...>& row, sqlite3_stmt* statement)
+{
+  using ColumnType = typename std::remove_reference<decltype(std::get<N>(row.columns))>::type;
+
+  auto&& column = std::get<N>(row.columns);
+  column.value = static_cast<decltype(column.value)>(extract_row_value<typename ColumnType::real_type>(statement, N));
+
+  extract_row_values<N+1>(row, statement);
+}
+
+template <std::size_t N=0, typename... T>
+typename std::enable_if<N == sizeof...(T), void>::type
+extract_row_values(Row<T...>&, sqlite3_stmt*)
+{}
+
+template <typename... T>
+struct SelectQuery: public Query
+{
+    SelectQuery(std::string table_name):
+        Query("SELECT"),
+        table_name(table_name)
+    {
+      this->insert_col_name<0>();
+      this->body += " from " + this->table_name;
+    }
+
+    template <std::size_t N>
+    typename std::enable_if<N < sizeof...(T), void>::type
+    insert_col_name()
+    {
+      using ColumnsType = std::tuple<T...>;
+      ColumnsType tuple{};
+      auto value = std::get<N>(tuple);
+
+      this->body += " "s + value.name;
+
+      if (N < (sizeof...(T) - 1))
+        this->body += ", ";
+
+      this->insert_col_name<N+1>();
+    }
+    template <std::size_t N>
+    typename std::enable_if<N == sizeof...(T), void>::type
+    insert_col_name()
+    {}
+
+  SelectQuery& where()
+    {
+      this->body += " WHERE ";
+      return *this;
+    };
+
+    SelectQuery& order_by()
+    {
+      this->body += " ORDER BY ";
+      return *this;
+    }
+
+    SelectQuery& limit()
+    {
+      this->body += " LIMIT ";
+      return *this;
+    }
+
+    auto execute(sqlite3* db)
+    {
+      auto statement = this->prepare(db);
+      int i = 1;
+      for (const std::string& param: this->params)
+        {
+          if (sqlite3_bind_text(statement, i, param.data(), static_cast<int>(param.size()), SQLITE_TRANSIENT) != SQLITE_OK)
+            log_debug("Failed to bind ", param, " to param ", i);
+          else
+            log_debug("Bound ", param, " to ", i);
+
+          i++;
+        }
+      std::vector<Row<T...>> rows;
+      while (sqlite3_step(statement) == SQLITE_ROW)
+        {
+          Row<T...> row(this->table_name);
+          extract_row_values(row, statement);
+          rows.push_back(row);
+        }
+      return rows;
+    }
+
+    const std::string table_name;
+};
+
+template <typename T, typename... ColumnTypes>
+typename std::enable_if<!std::is_integral<T>::value, SelectQuery<ColumnTypes...>&>::type
+operator<<(SelectQuery<ColumnTypes...>& query, const T&)
+{
+  query.body += T::name;
+  return query;
+}
+
+template <typename... ColumnTypes>
+SelectQuery<ColumnTypes...>& operator<<(SelectQuery<ColumnTypes...>& query, const char* str)
+{
+  query.body += str;
+  return query;
+}
+
+template <typename... ColumnTypes>
+SelectQuery<ColumnTypes...>& operator<<(SelectQuery<ColumnTypes...>& query, const std::string& str)
+{
+  query.body += "?";
+  actual_add_param(query, str);
+  return query;
+}
+
+template <typename Integer, typename... ColumnTypes>
+typename std::enable_if<std::is_integral<Integer>::value, SelectQuery<ColumnTypes...>&>::type
+operator<<(SelectQuery<ColumnTypes...>& query, const Integer& i)
+{
+  query.body += "?";
+  actual_add_param(query, i);
+  return query;
+}

src/database/table.hpp

@@ -0,0 +1,84 @@
+#pragma once
+
+#include <database/select_query.hpp>
+#include <database/type_to_sql.hpp>
+#include <logger/logger.hpp>
+#include <database/row.hpp>
+
+#include <algorithm>
+#include <string>
+
+template <typename... T>
+class Table
+{
+  static_assert(sizeof...(T) > 0, "Table cannot be empty");
+  using ColumnTypes = std::tuple<T...>;
+
+ public:
+  using RowType = Row<T...>;
+
+  Table(std::string name):
+      name(std::move(name))
+  {}
+
+  void create(sqlite3* db)
+  {
+    std::string res{"CREATE TABLE IF NOT EXISTS "};
+    res += this->name;
+    res += " (\n";
+    this->add_column_create<0>(res);
+    res += ")";
+
+    log_debug(res);
+
+    char* error;
+    const auto result = sqlite3_exec(db, res.data(), nullptr, nullptr, &error);
+    log_debug("result: ", +result);
+    if (result != SQLITE_OK)
+      {
+        log_error("Error executing query: ", error);
+        sqlite3_free(error);
+      }
+  }
+
+  RowType row()
+  {
+    return {this->name};
+  }
+
+  SelectQuery<T...> select()
+  {
+    SelectQuery<T...> select(this->name);
+    return select;
+  }
+
+  const std::string& get_name() const
+  {
+    return this->name;
+  }
+
+ private:
+  template <std::size_t N>
+  typename std::enable_if<N < sizeof...(T), void>::type
+  add_column_create(std::string& str)
+  {
+    using ColumnType = typename std::remove_reference<decltype(std::get<N>(std::declval<ColumnTypes>()))>::type;
+    using RealType = typename ColumnType::real_type;
+    str += ColumnType::name;
+    str += " ";
+    str += TypeToSQLType<RealType>::type;
+    str += " "s + ColumnType::options;
+    if (N != sizeof...(T) - 1)
+      str += ",";
+    str += "\n";
+
+    add_column_create<N+1>(str);
+  }
+
+  template <std::size_t N>
+  typename std::enable_if<N == sizeof...(T), void>::type
+  add_column_create(std::string&)
+  { }
+
+  const std::string name;
+};

src/database/type_to_sql.cpp

@@ -0,0 +1,7 @@
+#include <database/type_to_sql.hpp>
+
+template <> const std::string TypeToSQLType<int>::type = "INTEGER";
+template <> const std::string TypeToSQLType<std::size_t>::type = "INTEGER";
+template <> const std::string TypeToSQLType<long>::type = "INTEGER";
+template <> const std::string TypeToSQLType<bool>::type = "INTEGER";
+template <> const std::string TypeToSQLType<std::string>::type = "TEXT";

src/database/type_to_sql.hpp

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <string>
+
+template <typename T>
+struct TypeToSQLType { static const std::string type; };