<?php
function or_flush_latest_posts() {
  $options = get_option('or_widget_latest_posts');
  for ($i=1; $i<= $options['widgets_count']; $i++) wp_cache_delete("or_latest_posts_$i");
}
add_action('save_post', 'or_flush_latest_posts');
add_action('deleted_post', 'or_flush_latest_posts');
 
function or_latest_posts_widget($args, $widget_args = 1) {
  if (!(is_home() || is_page() || is_single())) return '';
 
  extract( $args, EXTR_SKIP );
  if ( is_numeric($widget_args) ) $widget_args = array( 'number' => $widget_args );
  $widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );
  extract( $widget_args, EXTR_SKIP );
  
  if ( $output = wp_cache_get("or_latest_posts_$number") ) return print($output);
 
  ob_start();
  $options = get_option('or_widget_latest_posts');
  if ( !isset($options[$number]) ) return;
  
  $catID = empty($options[$number]['cat']) ? 1 : $options[$number]['cat'];
  if ( empty($options[$number]['title']) ) {
    $categoryInfo = get_category($catID);
    $title = $categoryInfo->name;
  } else {
    $title = $options[$number]['title'];
  }
  
  $cat_link = get_category_link($catID);
 
  if ($options[$number]['show_rss']) {
    $feed_url = "<a href=\"$cat_link/feed\" title=\"Flux de $title\"><img src=\"".  get_bloginfo('template_url'). "/images/feed.gif\" alt=\"RSS\"/></a>";
    $title .= " $feed_url";
  }
  
  $more_title = $options[$number]['more'];
  if ($more_title!='') $more_link = "<li><br/><a href=\"$cat_link\">$more_title</a></li>";
  else $more_link = "";
  
  if ( !$nb = (int) $options[$number]['number'] ) $nb = 10;
  else if ( $nb < 1 ) $nb = 1;
  else if ( $nb > 15 ) $nb = 15;
 
  $r = new WP_Query("showposts=$nb&what_to_show=posts&nopaging=0&post_status=publish&cat=$catID");
  $i = 0;
  if ($r->have_posts()) :
?>
    <?php echo $before_widget; ?>
      <?php echo $before_title . $title . $after_title; ?>
      <ul>
      <?php  while ($r->have_posts()) : $r->the_post(); ?>
      <li><a href="<?php the_permalink() ?>"><?php the_title();?></a></li>
    <?php 
      // security because sometime bugs occurs (why?)
      $i = $i + 1;
      if ($i>$nb or $i>15) break;
    ?>
      <?php endwhile; ?>
      <?php echo $more_link; ?>
      </ul>
    <?php echo $after_widget; ?>
<?php
  endif;
  wp_cache_add("or_latest_posts_$number", ob_get_flush());
}
 
function or_latest_posts_widget_control($widget_args = 1 ) {
  global $wp_registered_widgets;
  static $updated = false; // Whether or not we have already updated the data after a POST submit
 
  if ( is_numeric($widget_args) ) $widget_args = array( 'number' => $widget_args );
  $widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );
  extract( $widget_args, EXTR_SKIP );
 
  // Data should be stored as array:  array( number => data for that instance of the widget, ... )
  $options = get_option('or_widget_latest_posts');
  if ( !is_array($options) ) $options = array();
 
  // We need to update the data
  if ( !$updated && !empty($_POST['sidebar']) ) {
    // Tells us what sidebar to put the data in
    $sidebar = (string) $_POST['sidebar'];
 
    $sidebars_widgets = wp_get_sidebars_widgets();
    if ( isset($sidebars_widgets[$sidebar]) ) $this_sidebar =& $sidebars_widgets[$sidebar];
    else $this_sidebar = array();
 
    foreach ( $this_sidebar as $_widget_id ) {
      // Remove all widgets of this type from the sidebar.  
      // We'll add the new data in a second.  This makes sure we don't get any duplicate data
      // since widget ids aren't necessarily persistent across multiple updates
      if ( 'or-latest-posts' == $wp_registered_widgets[$_widget_id]['callback'] && isset($wp_registered_widgets[$_widget_id]['params'][0]['number']) ) {
        $widget_number = $wp_registered_widgets[$_widget_id]['params'][0]['number'];
        if ( !in_array( "or-latest-posts-$widget_number", $_POST['widget-id'] ) ) unset($options[$widget_number]);
      }
    }
 
    foreach ( (array) $_POST['or-latest-posts'] as $widget_number => $widget_instance ) {
      $data = array();
      $data['title'] = strip_tags(stripslashes($widget_instance["title"]));
      $data['cat'] = (int) $widget_instance["cat"];
      $data['number'] = (int) $widget_instance["number"];
      $data['show_rss'] = (int) $widget_instance["rss"];
      $data['more'] = strip_tags(stripslashes($widget_instance["more"]));
      $options[$widget_number] = $data;
    }
 
    update_option('or_widget_latest_posts', $options);
    or_flush_latest_posts();
    $updated = true; // So that we don't go through this more than once
  }
 
  if ( -1 == $number ) {
    // We echo out a template for a form which can be converted to a specific form later via JS
    $number = '%i%';
  }
  if ( !$nb = (int) $options[$number]['number'] ) $nb = 5;
  
  
  $id = "or-latest-posts-title-$number";
  $value = attribute_escape($options[$number]['title']);
  echo '<p><label for="'. $id. '">'. __('Title'). ': <input style="width: 200px;" id="'. $id. '" name="or-latest-posts['. $number. '][title]" type="text" value="'. $value. '" /></label></p>';
 
  echo '<p><label>Posts in ';
  wp_dropdown_categories(array('name'=> "or-latest-posts[$number][cat]", 'selected'=>$options[$number]['cat'], 'hide_empty'=>0));
  echo '</label></p>';
 
  $id = "or-latest-posts-number-$number";
  echo '<p><label for="'. $id. '">'. __('Number of posts to show'). ': <input size = 4 id="'. $id. '" name="or-latest-posts['. $number. '][number]" type="text" value="'. $nb. '" /></label> '. __('(max 15)'). '</p>';
 
  $id = "or-latest-posts-rss-$number";
  echo '<p><label for="'. $id. '">'. __('Show RSS link'). ': <input type="checkbox" id="'. $id. '" name="or-latest-posts['. $number. '][rss]" value="1"'.($options[$number]['show_rss'] ? ' checked' : '').' /></label></p>';
 
  $id = "or-latest-posts-more-$number";
  $value = attribute_escape($options[$number]['more']);
  echo '<p><label for="'. $id. '">'. __('More link title'). ': <input style="width: 200px;" id="'. $id. '" name="or-latest-posts['. $number. '][more]" type="text" value="'. $value. '" /></label></p>';
 
  echo '<input type="hidden" id="or-latest-posts-submit-'. $number .'" name="or-latest-posts['. $number. '][submit]" value="1" />';
}
 
// Registers the widget(s).
function or_latest_posts_widget_register() {
  if ( !$options = get_option('or_widget_latest_posts') ) $options = array();
  $widget_ops = array('classname' => 'widget_or_latest_posts', 'description' => __('Show latest post from a specific category'));
  $control_ops = array('width' => 300, 'height' => 250, 'id_base' => 'or_latest_posts');
  $name = __('Latest Posts');
  
  $registered = false;
  foreach ( array_keys($options) as $o ) {
    // Old widgets can have null values for some reason
    if ( !isset($options[$o]['title']) ) continue;
 
    // $id should look like {$id_base}-{$o}
    $id = "or_latest_posts-$o"; // Never never never translate an id
    $registered = true;
    wp_register_sidebar_widget( $id, $name, 'or_latest_posts_widget', $widget_ops, array( 'number' => $o ) );
    wp_register_widget_control( $id, $name, 'or_latest_posts_widget_control', $control_ops, array( 'number' => $o ) );
  }
 
  // If there are none, we register the widget's existance with a generic template
  if ( !$registered ) {
    wp_register_sidebar_widget( 'many-1', $name, 'or_latest_posts_widget', $widget_ops, array( 'number' => -1 ) );
    wp_register_widget_control( 'many-1', $name, 'or_latest_posts_widget_control', $control_ops, array( 'number' => -1 ) );
  }
}
 
add_action('widgets_init', 'or_latest_posts_widget_register');
?>