Merge branch 'orm' into 'master'

Pure c++ sqlite3 ORM

Closes #3271

See merge request !11

1 files changed, 129 insertions, 0 deletions

diff --git a/src/database/insert_query.hpp b/src/database/insert_query.hpp
new file mode 100644
index 0000000..4965fc0
--- /dev/null
+++ b/src/database/insert_query.hpp
@@ -0,0 +1,129 @@
+#pragma once
+
+#include <database/statement.hpp>
+#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(Statement& statement, std::vector<std::string>& params, const std::tuple<T...>&)
+{
+  const auto value = params.front();
+  params.erase(params.begin());
+  if (sqlite3_bind_text(statement.get(), 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(Statement& 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.get(), N + 1, static_cast<sqlite3_int64>(column.value)) != SQLITE_OK)
+        log_error("Failed to bind ", column.value, " to id.");
+    }
+  else if (sqlite3_bind_null(statement.get(), 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.get()) != 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, Statement& 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...>&, Statement&)
+  {}
+
+  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)
+  {
+    using ColumnType = typename std::remove_reference<decltype(std::get<N>(columns))>::type;
+
+    this->body += ColumnType::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:
+};