<?php
// +-----------------------------------------------------------------------+
// | akBookStyle  - a plugin for Piwigo                                    |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2009      Nicolas Roudaire        http://www.nikrou.net  |
// | Copyright(C) 2009      vdigital                                       |
// +-----------------------------------------------------------------------+
// | 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                                          |
// |                                                                       |
// | 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, write to the Free Software           |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA.                                                                  |
// +-----------------------------------------------------------------------+

if (!defined('PHPWG_ROOT_PATH')) {
  die('Hacking attempt!');
}

include_once(PHPWG_ROOT_PATH.'include/functions_picture.inc.php');

class akContent
{
  public function __construct($config) {
    $this->plugin_config = $config;
    $this->current_picture = 0;
    $this->next_picture = null;
    $this->previous_picture = null;
    $this->applicable = false;

    $this->picture_pattern_format = '`^%s/(?:start\-\d+/)?picture/(\d+)$`';
  }

  public function page_force() {
    global $page;

    if (isset($page['category'])) {
      $cat_filter = $this->plugin_config->ak_categories;
      $this->applicable = (stripos($page['category']['name'], $cat_filter) === false) ? false:true;
      if ( $this->applicable ) { 
        $page['nb_image_page'] = $this->plugin_config->ak_by_page;
      }
    }
  }

  public function loc_begin_index_thumbnails($images) {
    global $template;

    if ($this->applicable === false) return;
    $this->category_url = make_index_url(array('section' => 'category',
					       'category' => $GLOBALS['page']['category'],
					       'start' => $GLOBALS['page']['start']
					       ) 
					 );
    $this->picture_pattern = sprintf($this->picture_pattern_format,
				     str_replace('?', '\?', $this->category_url)
				     );
				     
    $this->current_picture = $this->getPictureId($images);

    $template->set_filenames(array('index_thumbnails'=> AK_PLUGIN_TEMPLATE . '/ak_thumbnails.tpl'));
    $template->assign('AK_PLUGIN_CSS', AK_PLUGIN_CSS);
    $template->assign('AK_PLUGIN_JS', AK_PLUGIN_JS);

    $template->assign('AK_DIR_THUMBNAIL', isset($GLOBALS['conf']['dir_thumbnail'])?$GLOBALS['conf']['dir_thumbnail']:'thumbnail');
    $template->assign('AK_PREFIX_THUMBNAIL', $GLOBALS['conf']['prefix_thumbnail']);
    $template->assign('AK_BY_LINE', $this->plugin_config->ak_by_line);
    $template->assign('AK_MOUSE_EVENT', $this->plugin_config->ak_mouse_event);
    $template->assign('AK_THUMBNAIL_SIZE', $this->plugin_config->ak_thumbnail_size);
    $template->assign('AK_RELOADED_IMAGE_TPL', AK_PLUGIN_TEMPLATE. '/ak_reloaded_image.tpl');
    $template->assign('AK_VERTICAL_TPL', AK_PLUGIN_TEMPLATE. '/ak_vertical.tpl');
    $template->assign('AK_HORIZONTAL_TPL', AK_PLUGIN_TEMPLATE. '/ak_horizontal.tpl');
    $template->assign('AK_THUMBNAILS_LOC', $this->plugin_config->ak_thumbnails_loc); 
    $template->assign('AK_PIC_SRC', get_image_url($images[$this->current_picture]));

    $template->assign('AK_NEXT', $this->getNextPicture($this->current_picture, $images));
    $template->assign('AK_PREVIOUS', $this->getPreviousPicture($this->current_picture, $images));
  }

  public function loc_end_index_thumbnails($tpl_vars, $images) {
    if ($this->applicable === false) return $tpl_vars;
    foreach ($tpl_vars as &$tpl_var) {
      list($thumbnail_width, $thumbnail_height) = getimagesize($tpl_var['TN_SRC']);
      $thumbnail_x_center = $thumbnail_width/2;
      $thumbnail_y_center = $thumbnail_height/2;
      $tpl_var['CLIP_TOP'] = round($thumbnail_y_center - $this->plugin_config->ak_thumbnail_size/2);
      $tpl_var['CLIP_RIGHT'] = round($thumbnail_x_center + $this->plugin_config->ak_thumbnail_size/2);
      $tpl_var['CLIP_BOTTOM'] = round($thumbnail_y_center + $this->plugin_config->ak_thumbnail_size/2);
      $tpl_var['CLIP_LEFT'] = round($thumbnail_x_center - $this->plugin_config->ak_thumbnail_size/2);
    }

    return $tpl_vars;
  }

  public function loc_end_picture() {
    if (isset($_SERVER['HTTP_X_REQUESTED_WITH']) 
	&& ($_SERVER['HTTP_X_REQUESTED_WITH']=='XMLHttpRequest')) {      
      header("Content-Type: application/json");

      $response = array();
      $tpl_vars = $GLOBALS['template']->smarty->_tpl_vars;
      $response['AK_PIC_SRC'] = $tpl_vars['SRC_IMG'];
      $response['AK_PIC_ALT'] = $tpl_vars['ALT_IMG'];
      if (isset($tpl_vars['ALT_IMG'])) {
	$response['AK_PIC_TITLE'] = $tpl_vars['ALT_IMG'];
      } else {
	$response['AK_PIC_TITLE'] = '';
      }

      if (isset($tpl_vars['previous'])) {
	$response['AK_PREVIOUS'] = $tpl_vars['previous']['url'];
      }
      if (isset($tpl_vars['next'])) {
	$response['AK_NEXT'] = $tpl_vars['next']['url'];
      }
      echo json_encode($response);
      exit();

    }
  }

  /*** privates methods ***/
  private function makeAkUrl($image) {
    return sprintf('%s/picture/%d', $this->category_url, $image['ID']);
  }

  private function getPictureId($images) {
    if ($GLOBALS['conf']['question_mark_in_urls']==false and
      isset($_SERVER["PATH_INFO"]) and !empty($_SERVER["PATH_INFO"]) ) {
      $rewritten = $_SERVER["PATH_INFO"];
      $rewritten = str_replace('//', '/', $rewritten);
    } else {
      $rewritten = '';
      foreach (array_keys($_GET) as $keynum => $key) {
        $rewritten = $key;
        break;
      }
    }
    $rewritten = make_index_url().$rewritten;

    if (preg_match($this->picture_pattern, $rewritten, $matches)) {
      foreach ($images as $index => $image) {
        if ($image['id']==$matches[1]) {
          return $index;
        }
      }
      return false;
    } else {
      return false;
    }
  }

  private function getPreviousPicture($current, $images) {
    $previous = $current-1;
    if ($previous>0) {
      return $this->makeAkUrl(array('ID' => $images[$previous]['id']));
    } else {
      return null;
    }
  }

  private function getNextPicture($current, $images) {
    $next = $current+1;
    if ($next<count($images)) {
      return $this->makeAkUrl(array('ID' => $images[$next]['id']));
    } else {
      return null;
    }
  }
}
?>