jystewart / wordpress-post-banners

Extension to make it easy to associate a banner image with each post in a wordpress blog

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wordpress-post-banners / post-banners.php
100644 98 lines (84 sloc) 3.578 kb
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<?php
/*
Plugin Name: Wordpress Post Banners
Plugin URI: http://github.com/jystewart/wordpress-post-banners
Description: Making it easier to specify a banner image for a post that isn't part of the post body
Version: 0.1
Author: James Stewart
Author URI: http://jystewart.net/process/
*/
 
/*  Copyright 2008  James Stewart  (email : james@jystewart.net) */
 
add_action('admin_menu', 'post_banners_add_custom_box');
add_action('save_post', 'post_banners_process_saved_post');
add_action('admin_menu', 'post_banners_admin_menu');
add_filter('the_content_rss', 'post_banners_add_image_to_feed_item');
 
function post_banners_add_image_to_feed_item($content) {
  $options = get_option('post_banners_options');
  if (isset($options['display_banners_in_feeds']) && $options['display_banners_in_feeds'] == 1) {
    $image_tag = '<p>' . post_banners_image_tag_for_current_post() . '</p>';
    echo $image_tag;    
  }
  return $content;
}
 
function post_banners_image_tag_for_current_post($width = NULL, $height = NULL) {
  $details = post_banners_for_current_post();
  if (! empty($details['src'])) {
    if ($width && $height) {
      return '<img src="' . $details['src'][0] . '" alt="' . $details['alt'][0] . '" width="' . $width . '" height="' . $height . '">';
    } 
    return '<img src="' . $details['src'][0] . '" alt="' . $details['alt'][0] . '">';
  }
  return '';
}
 
function post_banners_for_current_post() {
  return array(
    'src' => get_post_custom_values('post_banner_image'),
    'alt' => get_post_custom_values('post_banner_alt')
  );
}
 
function post_banners_admin_menu() {
  add_options_page(__('Post Banners', 'post-banners'), __('Post Banners', 'post-banners'), 8, basename(__FILE__), 'post_banners_admin');
}
 
function post_banners_admin() {
  $options = get_option('post_banners_options');
  if (isset($_POST["post_banners_options_submit"])) {
    $options = array(
      'display_banners_in_feeds' => $_POST['display_banners_in_feeds']
    );
    update_option('post_banners_options', $options);
		$message = __('Options updated.', 'post-banners');
  }
  include dirname(__FILE__) . '/templates/admin.tpl.php';
}
 
function post_banners_input() {
  include dirname(__FILE__) . '/templates/input_fields.tpl.php';
}
 
function post_banners_add_custom_box() {
  add_meta_box('post_banners_input', __('Post Banner Image'), 'post_banners_input', 'post', 'normal', 'high');  
}
 
function post_banners_process_saved_post($post_id) {
  $the_post = wp_is_post_revision($post_id);
  if ($the_post) {
    $post_id = $the_post;
  }
 
  /* Check whether we have a file uploaded */
  if (isset($_FILES['post_banner_image'])) {
    $key = 'post_banner_image';
    $override = array('test_form' => false);
    $file = wp_handle_upload($_FILES['post_banner_image'], $override);
 
    if (isset($file['error'])) {
      // handle error
    } else {
      // store the image details in a custom field
      global $wpdb;
      $wpdb->query($wpdb->prepare('DELETE FROM ' . $wpdb->postmeta . ' WHERE `post_id` = %d AND `meta_key` IN (%s, %s)', $post_id, 'post_banner_image', 'post_banner_alt'));
      $wpdb->query($wpdb->prepare('INSERT INTO ' . $wpdb->postmeta . ' (`post_id`, `meta_key`, `meta_value` ) VALUES (%s, %s, %s)', 
        $post_id, 'post_banner_image', $file['url']));
      if (isset($_POST['post_banner_alt'])) {
        $wpdb->query($wpdb->prepare('INSERT INTO ' . $wpdb->postmeta . ' (`post_id`, `meta_key`, `meta_value` ) VALUES (%s, %s, %s)', 
          $post_id, 'post_banner_alt', htmlspecialchars($_POST['post_banner_alt'])));        
      }
    }
  }
}
 
 
?>