/**
* Add Open Graph protocol markup to <head>
*
* @since 1.0
*/
function fb_add_og_protocol()
{
global $post;
$meta_tags = array('http://ogp.me/ns#locale' => fb_get_locale(), 'http://ogp.me/ns#site_name' => get_bloginfo('name'), 'http://ogp.me/ns#type' => 'website');
if (is_home() || is_front_page()) {
$meta_tags['http://ogp.me/ns#title'] = get_bloginfo('name');
$meta_tags['http://ogp.me/ns#description'] = get_bloginfo('description');
} else {
if (is_single()) {
$post_type = get_post_type();
$meta_tags['http://ogp.me/ns#type'] = 'article';
$meta_tags['http://ogp.me/ns#url'] = apply_filters('rel_canonical', get_permalink());
if (post_type_supports($post_type, 'title')) {
$meta_tags['http://ogp.me/ns#title'] = get_the_title();
}
if (post_type_supports($post_type, 'excerpt')) {
// thanks to Angelo Mandato (http://wordpress.org/support/topic/plugin-facebook-plugin-conflicts-with-powerpress?replies=16)
// Strip and format the wordpress way, but don't apply any other filters which adds junk that ends up getitng stripped back out
if (!post_password_required($post)) {
// First lets get the post excerpt (shouldn't have any html, but anyone can enter anything...)
$meta_tags['http://ogp.me/ns#description'] = fb_strip_and_format_desc($post);
}
}
$meta_tags['http://ogp.me/ns/article#published_time'] = get_the_date('c');
$meta_tags['http://ogp.me/ns/article#modified_time'] = get_the_modified_date('c');
if (post_type_supports($post_type, 'author') && isset($post->post_author)) {
$meta_tags['http://ogp.me/ns/article#author'] = get_author_posts_url($post->post_author);
}
// add the first category as a section. all other categories as tags
$cat_ids = get_the_category();
if (!empty($cat_ids)) {
$cat = get_category($cat_ids[0]);
if (!empty($cat)) {
$meta_tags['http://ogp.me/ns/article#section'] = $cat->name;
}
//output the rest of the categories as tags
unset($cat_ids[0]);
if (!empty($cat_ids)) {
$meta_tags['http://ogp.me/ns/article#tag'] = array();
foreach ($cat_ids as $cat_id) {
$cat = get_category($cat_id);
$meta_tags['http://ogp.me/ns/article#tag'][] = $cat->name;
unset($cat);
}
}
}
// add tags. treat tags as lower priority than multiple categories
$tags = get_the_tags();
if ($tags) {
if (!array_key_exists('http://ogp.me/ns/article#tag', $meta_tags)) {
$meta_tags['http://ogp.me/ns/article#tag'] = array();
}
foreach ($tags as $tag) {
$meta_tags['http://ogp.me/ns/article#tag'][] = $tag->name;
}
}
// does current post type and the current theme support post thumbnails?
if (post_type_supports($post_type, 'thumbnail') && function_exists('has_post_thumbnail') && has_post_thumbnail()) {
list($post_thumbnail_url, $post_thumbnail_width, $post_thumbnail_height) = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'full');
if (!empty($post_thumbnail_url)) {
$image = array('url' => $post_thumbnail_url);
if (!empty($post_thumbnail_width)) {
$image['width'] = absint($post_thumbnail_width);
}
if (!empty($post_thumbnail_height)) {
$image['height'] = absint($post_thumbnail_height);
}
$meta_tags['http://ogp.me/ns#image'] = array($image);
}
}
} else {
if (is_author() && isset($post->post_author)) {
$meta_tags['http://ogp.me/ns#type'] = 'profile';
$meta_tags['http://ogp.me/ns/profile#first_name'] = get_the_author_meta('first_name', $post->post_author);
$meta_tags['http://ogp.me/ns/profile#last_name'] = get_the_author_meta('last_name', $post->post_author);
if (is_multi_author()) {
$meta_tags['http://ogp.me/ns/profile#username'] = get_the_author_meta('login', $post->post_author);
}
} else {
if (is_page()) {
$meta_tags['http://ogp.me/ns#type'] = 'article';
$meta_tags['http://ogp.me/ns#title'] = get_the_title();
$meta_tags['http://ogp.me/ns#url'] = apply_filters('rel_canonical', get_permalink());
}
}
}
}
$options = get_option('fb_options');
if (!empty($options['app_id'])) {
$meta_tags['http://ogp.me/ns/fb#app_id'] = $options['app_id'];
}
$meta_tags = apply_filters('fb_meta_tags', $meta_tags, $post);
foreach ($meta_tags as $property => $content) {
fb_output_og_protocol($property, $content);
}
}
/**
* Inits the Facebook JavaScript SDK.
*
* @since 1.0
*/
function fb_js_sdk_setup()
{
$options = get_option('fb_options');
if (empty($options['app_id'])) {
return;
}
$args = apply_filters('fb_init', array('appId' => $options['app_id'], 'channelUrl' => add_query_arg('fb-channel-file', 1, site_url('/')), 'status' => true, 'cookie' => true, 'xfbml' => true, 'oauth' => true));
echo '<script type="text/javascript">window.fbAsyncInit=function(){FB.init(' . json_encode($args) . ');';
do_action('fb_async_init', $args);
echo '}</script>';
$locale = fb_get_locale();
if (!$locale) {
return;
}
wp_enqueue_script('fb-connect', (is_ssl() ? 'https' : 'http') . '://connect.facebook.net/' . $locale . '/all.js', array(), null, true);
add_action('wp_footer', 'fb_root');
}
