/* -*- Mode: C; c-basic-offset: 4 -*-
 * pygtk- Python bindings for the GTK toolkit.
 * Copyright (C) 2008  Johan Dahlin
 * Copyright (C) 2008  Gian Mario Tagliaretti
 *
 *   giomodule.c: module wrapping the GIO library
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 * USA
 */

#include "pygio-utils.h"

/**
 * pygio_check_cancellable:
 * @pycancellable:
 * @cancellable:
 *
 * Returns:
 */
gboolean
pygio_check_cancellable(PyGObject *pycancellable,
			GCancellable **cancellable)
{
  if (pycancellable == NULL || (PyObject*)pycancellable == Py_None)
      *cancellable = NULL;
  else if (pygobject_check(pycancellable, &PyGCancellable_Type))
      *cancellable = G_CANCELLABLE(pycancellable->obj);
  else
    {
      PyErr_SetString(PyExc_TypeError,
		      "cancellable should be a gio.Cancellable");
      return FALSE;
    }
  return TRUE;
}

/**
 * pygio_check_launch_context:
 * @pycontext:
 * @context:
 *
 * Returns:
 */
gboolean
pygio_check_launch_context(PyGObject *pycontext,
                           GAppLaunchContext **context)
{
  if (pycontext == NULL || (PyObject*)pycontext == Py_None)
      *context = NULL;
  else if (pygobject_check(pycontext, &PyGAppLaunchContext_Type))
      *context = G_APP_LAUNCH_CONTEXT(pycontext->obj);
  else
    {
      PyErr_SetString(PyExc_TypeError,
		      "launch_context should be a GAppLaunchContext or None");
      return FALSE;
    }
  return TRUE;
}

/**
 * pygio_pylist_to_gfile_glist:
 * @pyfile_list:
 *
 * Returns:
 */
GList *
pygio_pylist_to_gfile_glist(PyObject *pyfile_list)
{
    GList *file_list = NULL;
    PyObject *item;
    int len, i;

    len = PySequence_Size(pyfile_list);
    for (i = 0; i < len; i++) {
        item = PySequence_GetItem(pyfile_list, i);
        if (!PyObject_TypeCheck(item, &PyGFile_Type)) {
            PyErr_SetString(PyExc_TypeError,
                            "files must be a list or tuple of GFile");
            g_list_free(file_list);
            return NULL;
        }
        file_list = g_list_prepend(file_list, ((PyGObject *)item)->obj);
    }
    file_list = g_list_reverse(file_list);

    return file_list;
}

/**
 * pygio_pylist_to_uri_glist:
 * @pyfile_list:
 *
 * Returns:
 */
GList *
pygio_pylist_to_uri_glist(PyObject *pyfile_list)
{
    GList *file_list = NULL;
    PyObject *item;
    int len, i;

    len = PySequence_Size(pyfile_list);
    for (i = 0; i < len; i++) {
    item = PySequence_GetItem(pyfile_list, i);
        if (!_PyUnicode_Check(item)) {
            PyErr_SetString(PyExc_TypeError,
                            "files must be strings");
            g_list_free(file_list);
            return NULL;
        }
        file_list = g_list_prepend(file_list, _PyUnicode_AsString(item));
    }
    file_list = g_list_reverse(file_list);

    return file_list;
}

/**
 * strv_to_pylist:
 * @strv: array of strings
 *
 * Returns: A python list of strings
 */
PyObject *
strv_to_pylist (char **strv)
{
    gsize len, i;
    PyObject *list;

    len = strv ? g_strv_length (strv) : 0;
    list = PyList_New (len);

    for (i = 0; i < len; i++)
        PyList_SetItem (list, i, _PyUnicode_FromString (strv[i]));

    return list;
}

/**
 * pylist_to_strv:
 * @strvp: a pointer to an array where return strings.
 *
 * Returns: TRUE if the list of strings could be converted, FALSE otherwise.
 */
gboolean
pylist_to_strv (PyObject *list,
                char   ***strvp)
{
    int i, len;
    char **ret;

    *strvp = NULL;

    if (list == Py_None)
        return TRUE;

    if (!PySequence_Check (list))
    {
        PyErr_Format (PyExc_TypeError, "argument must be a list or tuple of strings");
        return FALSE;
    }

    if ((len = PySequence_Size (list)) < 0)
        return FALSE;

    ret = g_new (char*, len + 1);
    for (i = 0; i <= len; ++i)
        ret[i] = NULL;

    for (i = 0; i < len; ++i)
    {
        PyObject *item = PySequence_GetItem (list, i);

        if (!item)
        {
            g_strfreev (ret);
            return FALSE;
        }

        if (!_PyUnicode_Check (item))
        {
            Py_DECREF (item);
            g_strfreev (ret);
            PyErr_Format (PyExc_TypeError, "argument must be a list of strings");
            return FALSE;
        }

        ret[i] = g_strdup (_PyUnicode_AsString (item));
        Py_DECREF (item);
    }

    *strvp = ret;
    return TRUE;
}