/* libquvi

 * Copyright (C) 2012  Toni Gundogdu <legatvs@gmail.com>

 *

 * This file is part of libquvi <http://quvi.sourceforge.net/>.

 *

 * This library is free software: you can redistribute it and/or

 * modify it under the terms of the GNU Affero General Public

 * License as published by the Free Software Foundation, either

 * version 3 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 Affero General Public License for more details.

 *

 * You should have received a copy of the GNU Affero General

 * Public License along with this library.  If not, see

 * <http://www.gnu.org/licenses/>.

 */

/** @file playlist_get.c */

#include "config.h"

#include <glib.h>

#include "quvi.h"

/* -- */

#include "_quvi_s.h"

#include "_quvi_playlist_s.h"

/* Advances the current media pointer to the first media if undefined. */

static void _chk_curr_media(_quvi_playlist_t qp, _quvi_playlist_media_t *qpm)

{

  if (qp->curr.media == NULL)

    quvi_playlist_media_next(qp);

  if (qp->curr.media != NULL)

    *qpm = (_quvi_playlist_media_t) qp->curr.media->data;

}

static const gchar empty[] = "";

static QuviError _playlist_get(_quvi_playlist_t qp,

                               QuviPlaylistProperty n, ...)

{

  _quvi_playlist_media_t qpm;

  QuviError rc;

  gdouble *dp;

  va_list arg;

  gchar **sp;

  glong *lp;

  gint type;

  va_start(arg, n);

  type = QUVI_PLAYLIST_PROPERTY_TYPE_MASK & (gint) n;

  dp = NULL;

  sp = NULL;

  lp = NULL;

  rc = QUVI_OK;

  qpm = NULL;

  switch (type)

    {

    case QUVI_PLAYLIST_PROPERTY_TYPE_STRING:

      sp = va_arg(arg, gchar**);

      if (sp == NULL)

        rc = QUVI_ERROR_INVALID_ARG;

      break;

    case QUVI_PLAYLIST_PROPERTY_TYPE_LONG:

      lp = va_arg(arg, glong*);

      if (lp == NULL)

        rc = QUVI_ERROR_INVALID_ARG;

      break;

    case QUVI_PLAYLIST_PROPERTY_TYPE_DOUBLE:

      dp = va_arg(arg, gdouble*);

      if (dp == NULL)

        rc = QUVI_ERROR_INVALID_ARG;

      break;

    default:

      rc = QUVI_ERROR_INVALID_ARG;

      break;

    }

  va_end(arg);

  if (rc != QUVI_OK)

    return (rc);

  switch (n)

    {

    case QUVI_PLAYLIST_PROPERTY_THUMBNAIL_URL:

      *sp = qp->url.thumbnail->str;

      break;

    case QUVI_PLAYLIST_PROPERTY_TITLE:

      *sp = qp->title->str;

      break;

    case QUVI_PLAYLIST_PROPERTY_ID:

      *sp = qp->id.playlist->str;

      break;

      /*

       * (Playlist) Media properties.

       *

       * quvi_playlist_get is expected to return the property values for

       * the first media the playlist script returned, just like

       * quvi_media_get does with media scripts. We must mimic this

       * behaviour by first attempting to move to the first item in the

       * playlist media list.

       *

       * Unlike with quvi_media_get, playlist scripts are allowed to return

       * nothing. Media scripts are expected to return at least one media

       * stream.

       *

       * This means that if the playlist script did not return any such

       * properties (e.g. media URL):

       *  - returned strings must be set to empty ("")

       *  - returned numeric values must be set to 0

       */

    case QUVI_PLAYLIST_MEDIA_PROPERTY_TITLE:

      _chk_curr_media(qp, &qpm;;

      *sp = (qpm != NULL) ? qpm->title->str : (gchar*) empty;

      break;

    case QUVI_PLAYLIST_MEDIA_PROPERTY_URL:

      _chk_curr_media(qp, &qpm;;

      *sp = (qpm != NULL) ? qpm->url->str : (gchar*) empty;

      break;

    case QUVI_PLAYLIST_MEDIA_PROPERTY_DURATION_MS:

      _chk_curr_media(qp, &qpm;;

      *dp = (qpm != NULL) ? qpm->duration_ms : 0;

      break;

    default:

      rc = QUVI_ERROR_INVALID_ARG;

      break;

    }

  return (rc);

}

/** @brief Return a playlist property

@sa @ref parse_playlist

@ingroup playlistprop

@note URLs will be returned in the escaped form

*/

void quvi_playlist_get(quvi_playlist_t handle,

                       QuviPlaylistProperty property, ...)

{

  _quvi_playlist_t qp;

  va_list arg;

  gpointer p;

  _quvi_t q;

  /* If G_DISABLE_CHECKS is defined then the check is not performed. */

  g_return_if_fail(handle != NULL);

  va_start(arg, property);

  p = va_arg(arg, gpointer);

  va_end(arg);

  qp = (_quvi_playlist_t) handle;

  q = qp->handle.quvi;

  q->status.rc = _playlist_get(qp, property, p);

}

/* vim: set ts=2 sw=2 tw=72 expandtab: */