// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// Mobius Forensic Toolkit
// Copyright (C) 2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021 Eduardo Aguiar
//
// This program 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; either version 2, or (at your option) any later
// version.
//
// 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/>.
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \file transaction.cc C++ API <i>mobius.database.transaction</i> class wrapper
//! \author Eduardo Aguiar
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
#include <pymobius.h>
#include "transaction.h"
#include "module.h"

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief create <i>transaction</i> Python object from C++ object
//! \param obj C++ object
//! \return new transaction object
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
PyObject *
PyMobius_Database_Transaction_from_cpp (mobius::database::transaction obj)
{
  PyObject *ret = _PyObject_New (&database_transaction_t);

  if (ret)
    ((database_transaction_o *) ret)->obj = new mobius::database::transaction (obj);

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>commit</i> method implementation
//! \param self object
//! \param args argument list
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_f_commit (database_transaction_o *self, PyObject *)
{
  if (self->obj == nullptr)
    {
      PyErr_SetString (PyExc_Exception, "Transaction is already ended");
      return nullptr;
    }

  // execute C++ code
  PyObject *ret = nullptr;

  try
    {
      self->obj->commit ();
      delete self->obj;
      self->obj = nullptr;
      ret = mobius::py::pynone ();
    }
  catch (const std::exception& e)
    {
      PyErr_SetString (PyExc_Exception, e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>rollback</i> method implementation
//! \param self object
//! \param args argument list
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_f_rollback (database_transaction_o *self, PyObject *)
{
  if (self->obj == nullptr)
    {
      PyErr_SetString (PyExc_Exception, "Transaction is already ended");
      return nullptr;
    }

  // execute C++ code
  PyObject *ret = nullptr;

  try
    {
      self->obj->rollback ();
      delete self->obj;
      self->obj = nullptr;
      ret = mobius::py::pynone ();
    }
  catch (const std::exception& e)
    {
      PyErr_SetString (PyExc_Exception, e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief Methods structure
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyMethodDef tp_methods[] =
{
  {
    (char *) "commit",
    (PyCFunction) tp_f_commit,
    METH_VARARGS,
    "commit operations"
  },
  {
    (char *) "rollback",
    (PyCFunction) tp_f_rollback,
    METH_VARARGS,
    "rollback operations"
  },
  {NULL, NULL, 0, NULL} // sentinel
};

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>transaction</i> deallocator
//! \param self object
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static void
tp_dealloc (database_transaction_o *self)
{
  delete self->obj;
  self->ob_type->tp_free ((PyObject*) self);
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief Type structure
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
PyTypeObject database_transaction_t =
{
  PyVarObject_HEAD_INIT (NULL, 0)
  "mobius.database.transaction",           		// tp_name
  sizeof (database_transaction_o),         		// tp_basicsize
  0,                                       		// tp_itemsize
  (destructor) tp_dealloc,                 		// tp_dealloc
  0,                                       		// tp_print
  0,                                       		// tp_getattr
  0,                                       		// tp_setattr
  0,                                       		// tp_compare
  0,                                       		// tp_repr
  0,                                       		// tp_as_number
  0,                                       		// tp_as_sequence
  0,                                       		// tp_as_mapping
  0,                                       		// tp_hash
  0,                                       		// tp_call
  0,                                       		// tp_str
  0,                                       		// tp_getattro
  0,                                       		// tp_setattro
  0,                                       		// tp_as_buffer
  Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,		// tp_flags
  "nested transaction control class",      		// tp_doc
  0,                                       		// tp_traverse
  0,                                       		// tp_clear
  0,                                       		// tp_richcompare
  0,                                       		// tp_weaklistoffset
  0,                                       		// tp_iter
  0,                                       		// tp_iternext
  tp_methods,                              		// tp_methods
  0,                                       		// tp_members
  0,                                       		// tp_getset
  0,                                       		// tp_base
  0,                                       		// tp_dict
  0,                                       		// tp_descr_get
  0,                                       		// tp_descr_set
  0,                                       		// tp_dictoffset
  0,                                       		// tp_init
  0,                                       		// tp_alloc
  0,                                  		        // tp_new
  0,                                       		// tp_free
  0,                                       		// tp_is_gc
  0,                                       		// tp_bases
  0,                                       		// tp_mro
  0,                                       		// tp_cache
  0,                                       		// tp_subclasses
  0,                                       		// tp_weaklist
  0,                                       		// tp_del
  0,                                       		// tp_version_tag
};
