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<?php
/**
* Holds the ShareaholicPublic class.
*
* @package shareaholic
*/
// Get the required libraries for the Share Counts API
require_once(SHAREAHOLIC_DIR . '/lib/social-share-counts/wordpress_http.php');
require_once(SHAREAHOLIC_DIR . '/lib/social-share-counts/seq_share_count.php');
require_once(SHAREAHOLIC_DIR . '/lib/social-share-counts/curl_multi_share_count.php');
require_once(SHAREAHOLIC_DIR . '/public_js.php');
/**
* This class is all about drawing the stuff in publishers'
* templates that visitors can see.
*
* @package shareaholic
*/
class ShareaholicPublic {
/**
* Loads before all else
*/
public static function init() {
add_filter('wp_headers', array('ShareaholicUtilities', 'add_header_xua'));
}
/**
* Loads before all else
*/
public static function after_setup_theme() {
// Ensure thumbnail/featured image support
if(!current_theme_supports('post-thumbnails')){
add_theme_support('post-thumbnails');
}
add_image_size('shareaholic-thumbnail', 300); // 300 pixels wide (and unlimited height)
}
/**
* The function called during the wp_head action. The
* rest of the plugin doesn't need to know exactly what happens.
*/
public static function wp_head() {
// this will only run on pages that would actually call
// the deprecated functions. For some reason I could not
// get this function to run using a hook, though that
// should not discourage anyone in the future. -DG
ShareaholicDeprecation::destroy_all();
self::script_tag();
self::shareaholic_tags();
self::draw_og_tags();
}
/**
* Inserts the script code snippet into the head of the page
*/
public static function script_tag() {
if (ShareaholicUtilities::has_accepted_terms_of_service() &&
ShareaholicUtilities::get_or_create_api_key()) {
ShareaholicUtilities::load_template('script_tag', array(
'api_key' => ShareaholicUtilities::get_option('api_key'),
'base_settings' => ShareaholicPublicJS::get_base_settings(),
'overrides' => ShareaholicPublicJS::get_overrides()
));
}
}
/**
* The function that gets called for shortcodes
*
* @param array $attributes this is passed keys: `id`, `app`, `title`, `link`, `summary`
* @param string $content is the enclosed content (if the shortcode is used in its enclosing form)
*/
public static function shortcode($attributes, $content = NULL) {
extract(shortcode_atts(array(
"id" => NULL,
"app" => 'share_buttons',
"title" => NULL,
"link" => NULL,
"summary" => NULL
), $attributes, 'shareaholic'));
if (isset($attributes['title'])) $title = esc_attr(trim($attributes['title']));
if (isset($attributes['link'])) $link = trim($attributes['link']);
if (isset($attributes['summary'])) $summary = esc_attr(trim($attributes['summary']));
return self::canvas($attributes['id'], $attributes['app'], $title, $link, $summary);
}
/**
* Draws the shareaholic meta tags.
*/
private static function shareaholic_tags() {
echo "\n<!-- Shareaholic Content Tags -->\n";
self::draw_site_name_meta_tag();
self::draw_language_meta_tag();
self::draw_url_meta_tag();
self::draw_keywords_meta_tag();
self::draw_article_meta_tag();
self::draw_site_id_meta_tag();
self::draw_plugin_version_meta_tag();
self::draw_image_meta_tag();
echo "\n<!-- Shareaholic Content Tags End -->\n";
}
/**
* Draws Shareaholic keywords meta tag.
*/
private static function draw_keywords_meta_tag() {
if (in_array(ShareaholicUtilities::page_type(), array('page', 'post'))) {
global $post;
$keywords = '';
if (is_attachment() && $post->post_parent){
$id = $post->post_parent;
} else {
$id = $post->ID;
}
// Get post tags
$keywords = implode(', ' , ShareaholicUtilities::permalink_keywords($id));
// Get post categories
$categories_array = get_the_category($id);
$categories = '';
$separator = ', ';
$output = '';
if($categories_array) {
foreach($categories_array as $category) {
if ($category->cat_name != "Uncategorized") {
$output .= $separator.$category->cat_name;
}
}
$categories = trim($output, $separator);
}
// Merge post tags and categories
if ($keywords != ''){
$keywords .= ', '.$categories;
} else {
$keywords .= $categories;
}
// Encode, lowercase & trim appropriately
$keywords = ShareaholicUtilities::normalize_keywords($keywords);
// Unique keywords
$keywords_array = array();
$keywords_array = explode(', ', $keywords);
$keywords_array = array_unique($keywords_array);
$keywords_unique_list = implode(', ', $keywords_array);
if ($keywords_unique_list != '' && $keywords_unique_list != "array") {
echo "<meta name='shareaholic:keywords' content='" . $keywords_unique_list . "' />\n";
}
}
}
/**
* Draws Shareaholic article meta tags
*/
private static function draw_article_meta_tag() {
if (in_array(ShareaholicUtilities::page_type(), array('page', 'post'))) {
global $post;
// Article Publish and Modified Time
$article_published_time = strtotime($post->post_date_gmt);
$article_modified_time = strtotime(get_lastpostmodified('GMT'));
if (!empty($article_published_time)) {
echo "<meta name='shareaholic:article_published_time' content='" . date('c', $article_published_time) . "' />\n";
}
if (!empty($article_modified_time)) {
echo "<meta name='shareaholic:article_modified_time' content='" . date('c', $article_modified_time) . "' />\n";
}
// Article Visibility
$article_visibility = $post->post_status;
$article_password = $post->post_password;
if ($article_visibility == 'draft' || $article_visibility == 'auto-draft' || $article_visibility == 'future' || $article_visibility == 'pending'){
echo "<meta name='shareaholic:shareable_page' content='false' />\n";
$article_visibility = 'draft';
} else if ($article_visibility == 'private' || $post->post_password != '') {
echo "<meta name='shareaholic:shareable_page' content='false' />\n";
$article_visibility = 'private';
} else if (is_attachment()) {
// attachments are shareable but not recommendable
echo "<meta name='shareaholic:shareable_page' content='true' />\n";
$article_visibility = 'private';
} else {
echo "<meta name='shareaholic:shareable_page' content='true' />\n";
$article_visibility = NULL;
}
// Lookup Metabox value
if (get_post_meta($post->ID, 'shareaholic_exclude_recommendations', true)) {
$article_visibility = 'private';
}
if (!empty($article_visibility)) {
echo "<meta name='shareaholic:article_visibility' content='" . $article_visibility . "' />\n";
}
// Article Author Name
if ($post->post_author) {
$article_author_data = get_userdata($post->post_author);
if ($article_author_data) {
$article_author_name = $article_author_data->display_name;
}
}
if (!empty($article_author_name)) {
echo "<meta name='shareaholic:article_author_name' content='" . $article_author_name . "' />\n";
}
}
}
/**
* Draws Shareaholic language meta tag.
*/
private static function draw_language_meta_tag() {
$blog_language = get_bloginfo('language');
if (!empty($blog_language)) {
echo "<meta name='shareaholic:language' content='" . $blog_language . "' />\n";
}
}
/**
* Draws Shareaholic url meta tag.
*/
private static function draw_url_meta_tag() {
if (in_array(ShareaholicUtilities::page_type(), array('page', 'post'))) {
$url_link = get_permalink();
echo "<meta name='shareaholic:url' content='" . $url_link . "' />\n";
}
}
/**
* Draws Shareaholic version meta tag.
*/
private static function draw_plugin_version_meta_tag() {
echo "<meta name='shareaholic:wp_version' content='" . ShareaholicUtilities::get_version() . "' />\n";
}
/**
* Draws Shareaholic site name meta tag.
*/
private static function draw_site_name_meta_tag() {
$blog_name = get_bloginfo();
if (!empty($blog_name)) {
echo "<meta name='shareaholic:site_name' content='" . $blog_name . "' />\n";
}
}
/**
* Draws Shareaholic site_id meta tag.
*/
private static function draw_site_id_meta_tag() {
$site_id = ShareaholicUtilities::get_option('api_key');
if (!empty($site_id)) {
echo "<meta name='shareaholic:site_id' content='" . $site_id . "' />\n";
}
}
/**
* Draws Shareaholic image meta tag. Will only run on pages or posts.
*/
private static function draw_image_meta_tag() {
if (in_array(ShareaholicUtilities::page_type(), array('page', 'post'))) {
global $post;
$thumbnail_src = '';
if (function_exists('has_post_thumbnail') && has_post_thumbnail($post->ID)) {
$thumbnail = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'large');
$thumbnail_src = esc_attr($thumbnail[0]);
}
if ($thumbnail_src == NULL) {
$thumbnail_src = ShareaholicUtilities::post_first_image();
}
if ($thumbnail_src != NULL) {
echo "<meta name='shareaholic:image' content='" . $thumbnail_src . "' />";
}
}
}
/**
* Draws an open graph image meta tag if they are enabled and exist. Will only run on pages or posts.
*/
private static function draw_og_tags() {
if (in_array(ShareaholicUtilities::page_type(), array('page', 'post'))) {
global $post;
$thumbnail_src = '';
$settings = ShareaholicUtilities::get_settings();
if (!get_post_meta($post->ID, 'shareaholic_disable_open_graph_tags', true) && (isset($settings['disable_og_tags']) && $settings['disable_og_tags'] == "off")) {
if (function_exists('has_post_thumbnail') && has_post_thumbnail($post->ID)) {
$thumbnail = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'large');
$thumbnail_src = esc_attr($thumbnail[0]);
}
if ($thumbnail_src == NULL) {
$thumbnail_src = ShareaholicUtilities::post_first_image();
}
if ($thumbnail_src != NULL) {
echo "\n<!-- Shareaholic Open Graph Tags -->\n";
echo "<meta property='og:image' content='" . $thumbnail_src . "' />";
echo "\n<!-- Shareaholic Open Graph Tags End -->\n";
}
}
}
}
/**
* This static function inserts the shareaholic canvas at the end of the post
*
* @param string $content the wordpress content
* @return string the content
*/
public static function draw_canvases($content) {
global $post;
$settings = ShareaholicUtilities::get_settings();
$page_type = ShareaholicUtilities::page_type();
foreach (array('share_buttons', 'recommendations') as $app) {
if (!get_post_meta($post->ID, "shareaholic_disable_{$app}", true)) {
if (isset($settings[$app]["{$page_type}_above_content"]) &&
$settings[$app]["{$page_type}_above_content"] == 'on') {
// share_buttons_post_above_content
$id = $settings['location_name_ids'][$app]["{$page_type}_above_content"];
$content = self::canvas($id, $app) . $content;
}
if (isset($settings[$app]["{$page_type}_below_content"]) &&
$settings[$app]["{$page_type}_below_content"] == 'on') {
// share_buttons_post_below_content
$id = $settings['location_name_ids'][$app]["{$page_type}_below_content"];
$content .= self::canvas($id, $app);
}
}
}
// something that uses the_content hook must return the $content
return $content;
}
/**
* Draws an individual canvas given a specific location
* id and app. The app isn't strictly necessary, but is
* being kept for now for backwards compatability.
* This method was private, but was made public to be accessed
* by the shortcode static function in global_functions.php.
*
* @param string $id the location id for configuration
* @param string $app the type of app
* @param string $title the title of URL
* @param string $link url
* @param string $summary summary text for URL
*/
public static function canvas($id, $app, $title = NULL, $link = NULL, $summary = NULL) {
global $post, $wp_query;
$page_type = ShareaholicUtilities::page_type();
$is_list_page = $page_type == 'index' || $page_type == 'category';
$loop_start = did_action('loop_start');
$loop_end = did_action('loop_end');
$in_loop = $loop_start > $loop_end ? TRUE : FALSE;
$link = trim($link);
// Use the $post object to get the title, link, and summary only if the
// title, link or summary is not provided AND one of the following is true:
// - we are on a non list page
// - we are in the wordpress loop
if (trim($title) == NULL && (!$is_list_page || $in_loop)) {
$title = htmlspecialchars($post->post_title, ENT_QUOTES);
}
if (trim($link) == NULL && (!$is_list_page || $in_loop)) {
$link = get_permalink($post->ID);
}
if (trim($summary) == NULL && (!$is_list_page || $in_loop)) {
$summary = htmlspecialchars(strip_tags(strip_shortcodes($post->post_excerpt)), ENT_QUOTES);
$summary = ShareaholicUtilities::truncate_text($summary, 500);
}
$canvas = "<div class='shareaholic-canvas'
data-app-id='$id'
data-app='$app'
data-title='$title'
data-link='$link'
data-summary='$summary'></div>";
return trim(preg_replace('/\s+/', ' ', $canvas));
}
/**
* Function to handle the share count API requests
*
*/
public static function share_counts_api() {
$debug_mode = isset($_GET['debug']) && $_GET['debug'] === '1';
$url = isset($_GET['url']) ? $_GET['url'] : '';
$services = isset($_GET['services']) ? $_GET['services'] : array();
$services = self::parse_services($services);
$cache_key = 'shr_api_res-' . md5( $url );
if (empty($url) || empty($services)) {
$result = array();
} else {
$result = get_transient($cache_key);
}
$has_curl_multi = self::has_curl();
if (!$result || $debug_mode || !self::has_services_in_result($result, $services)) {
if (isset($result['services']) && !$debug_mode) {
$services = array_keys(array_flip(array_merge($result['services'], $services)));
}
$result = array();
$options = array();
if ($debug_mode && isset($_GET['timeout'])) {
$options['timeout'] = intval($_GET['timeout']);
}
if(is_array($services) && count($services) > 0 && !empty($url)) {
if ($debug_mode && isset($_GET['client'])) {
if ($has_curl_multi && $_GET['client'] !== 'seq') {
$shares = new ShareaholicCurlMultiShareCount($url, $services, $options);
} else {
$shares = new ShareaholicSeqShareCount($url, $services, $options);
}
} else if($has_curl_multi) {
$shares = new ShareaholicCurlMultiShareCount($url, $services, $options);
} else {
$shares = new ShareaholicSeqShareCount($url, $services, $options);
}
$result = $shares->get_counts();
if ($debug_mode) {
$result['has_curl_multi'] = $has_curl_multi;
$result['curl_type'] = get_class($shares);
$result['raw'] = $shares->raw_response;
}
if (isset($result['data']) && !$debug_mode) {
$result['services'] = $services;
set_transient( $cache_key, $result, SHARE_COUNTS_CHECK_CACHE_LENGTH );
}
}
}
header('Access-Control-Allow-Origin: *');
header('Content-Type: application/json');
header('Cache-Control: max-age=180'); // 3 minutes
echo json_encode($result);
exit;
}
/**
* Helper method to parse the list of social services to get share counts
*/
public static function parse_services($services) {
$result = array();
if (empty($services) || !is_array($services)) {
return $result;
}
// make the set of services unique
$services = array_unique($services);
// only get the services we can get share counts for
$social_services = array_keys(ShareaholicSeqShareCount::get_services_config());
foreach($services as $service) {
if (in_array($service, $social_services)) {
array_push($result, $service);
}
}
return $result;
}
/**
* Helper method to check if the result has the requested services
*/
public static function has_services_in_result($result, $services) {
if (!isset($result['services'])) {
return false;
}
$requested_services = $result['services'];
foreach($services as $service) {
if (!in_array($service, $requested_services)) {
return false;
}
}
return true;
}
/**
* Function to return relevant plugin debug info
*
* @return debug info in JSON
*/
public static function debug_info() {
global $wpdb;
if (ShareaholicUtilities::get_option('disable_debug_info') == "on"){
exit;
}
if (ShareaholicUtilities::get_option('disable_internal_share_counts_api') == NULL || ShareaholicUtilities::get_option('disable_internal_share_counts_api') == "off"){
$server_side_share_count_status = "on";
} else {
$server_side_share_count_status = "off";
}
if (ShareaholicUtilities::has_accepted_terms_of_service() == 1){
$tos_status = "accepted";
} else {
$tos_status = "pending";
}
if (function_exists('curl_version')){
$curl_version = curl_version();
}
$info = array(
'plugin_version' => Shareaholic::VERSION,
'site_id' => ShareaholicUtilities::get_option('api_key'),
'domain' => get_bloginfo('url'),
'language' => get_bloginfo('language'),
'tos_status' => $tos_status,
'stats' => array (
'posts_total' => $wpdb->get_var( "SELECT count(ID) FROM $wpdb->posts where post_type = 'post' AND post_status = 'publish'" ),
'pages_total' => $wpdb->get_var( "SELECT count(ID) FROM $wpdb->posts where post_type = 'page' AND post_status = 'publish'" ),
'comments_total' => wp_count_comments()->approved,
'users_total' => $wpdb->get_var("SELECT count(ID) FROM $wpdb->users"),
),
'diagnostics' => array (
'theme' => get_option('template'),
'multisite' => is_multisite(),
'shareaholic_server_reachable' => ShareaholicUtilities::connectivity_check(),
'server_side_share_count_api_reachable' => ShareaholicUtilities::share_counts_api_connectivity_check(),
'php_version' => phpversion(),
'wp_version' => get_bloginfo('version'),
'curl' => array (
'status' => ShareaholicPublic::has_curl(),
'version' => $curl_version,
),
'plugins' => array (
'active' => get_option('active_plugins', array()),
'sitewide' => get_site_option('active_sitewide_plugins', array()),
),
),
'app_locations' => array (
'share_buttons' => ShareaholicUtilities::get_option('share_buttons'),
'recommendations' => ShareaholicUtilities::get_option('recommendations'),
),
'advanced_settings' => array (
'server_side_share_count_api' => $server_side_share_count_status,
)
);
header('Content-Type: application/json');
echo json_encode($info);
exit;
}
/**
* Function to return list of permalinks
*
* @return list of permalinks in JSON or plain text
*/
public static function permalink_list(){
// Input Params
$post_type = isset($_GET['post_type']) ? $_GET['post_type'] : "any";
$n = isset($_GET['n']) ? intval($_GET['n']) : -1;
$format = isset($_GET['format']) ? $_GET['format'] : "json";
$permalink_list = array();
$permalink_query = "post_type=$post_type&post_status=publish&posts_per_page=$n";
$posts = new WP_Query ($permalink_query);
$posts = $posts->posts;
foreach($posts as $post){
switch ($post->post_type){
case 'revision':
case 'nav_menu_item':
break;
case 'page':
$permalink = get_page_link($post->ID);
array_push($permalink_list, $permalink);
break;
case 'post':
$permalink = get_permalink($post->ID);
array_push($permalink_list, $permalink);
break;
case 'attachment':
break;
default:
$permalink = get_post_permalink($post->ID);
array_push($permalink_list, $permalink);
break;
}
}
if ($format === "text"){
header('Content-Type: text/plain; charset=utf-8');
foreach($permalink_list as $link) {
echo $link. "\r\n";
}
} elseif ($format === "json"){
header('Content-Type: application/json; charset=utf-8');
echo json_encode($permalink_list);
}
exit;
}
/**
* Function to return relevant info for a given permalink for the Related Content index
*
* @return page info in JSON
*/
public static function permalink_info() {
global $wpdb, $post;
// Input Params
$permalink = isset($_GET['permalink']) ? $_GET['permalink'] : NULL;
$body_text = isset($_GET['body_text']) ? $_GET['body_text'] : "raw";
if ($permalink == NULL){
return;
}
// Get post ID
$post_id = url_to_postid($permalink);
// for non-default paths - handle both https and http versions of the permalink
if ($post_id == 0){
$parse = parse_url($permalink);
if ($parse['scheme'] == "https"){
$permalink = str_replace("https", "http", $permalink);
$post_id = url_to_postid($permalink);
} else if ($parse['scheme'] == "http"){
$permalink = str_replace("http", "https", $permalink);
$post_id = url_to_postid($permalink);
}
}
if ($post_id == 0){
return;
}
// Get post for given ID
$post = get_post($post_id);
if ($post->post_status != 'publish' || $post->post_password != ''){
return;
}
// Post tags
$tags = ShareaholicUtilities::permalink_keywords($post_id);
// Post categories
$categories = array();
$categories_array = get_the_category($post_id);
if($categories_array) {
foreach($categories_array as $category) {
if ($category->cat_name != "Uncategorized") {
$category_name = ShareaholicUtilities::normalize_keywords($category->cat_name);
array_push($categories, $category_name);
}
}
}
// Post body
$order = array(" ", "\r\n", "\n", "\r", " ");
$post_body = str_replace($order, ' ', $post->post_content);
if ($body_text == "clean"){
$post_body = strip_tags($post_body);
} elseif ($body_text == "raw" || $body_text == NULL) {
$post_body = $post_body;
}
// Get post author name
if ($post->post_author) {
$author_data = get_userdata($post->post_author);
$author_name = $author_data->display_name;
}
// Term frequencies
// $term_frequency_title = array_count_values(str_word_count(strtolower(strip_tags($post->post_title)), 1));
$term_frequency_body = array_count_values(str_word_count(strtolower(strip_tags($post_body)), 1));
$term_frequency = $term_frequency_body;
arsort($term_frequency);
// Construct array
$info = array(
'permalink' => $permalink,
'domain' => get_bloginfo('url'),
'site_id' => ShareaholicUtilities::get_option('api_key'),
'content' => array(
'title' => $post->post_title,
'excerpt' => $post->post_excerpt,
'body' => $post_body,
'thumbnail' => ShareaholicUtilities::permalink_thumbnail($post->ID, "large"),
),
'post_metadata' => array(
'author_id' => $post->post_author,
'author_name' => $author_name,
'post_type' => $post->post_type,
'post_id' => $post_id,
'post_tags' => $tags,
'post_categories' => $categories,
'post_language' => get_bloginfo('language'),
'post_published' => date('c', strtotime($post->post_date_gmt)),
'post_updated' => date('c', strtotime(get_lastpostmodified('GMT'))),
'post_visibility' => $post->post_status,
),
'post_stats' => array(
'post_comments_count' => get_comments_number($post_id),
'post_content_title_character_count' => strlen(trim(html_entity_decode($post->post_title))),
'post_content_title_word_count' => str_word_count(strip_tags($post->post_title)),
'post_content_body_character_count' => strlen(trim(html_entity_decode($post_body))),
'post_content_body_word_count' => str_word_count(strip_tags($post_body)),
'term_frequency' => $term_frequency,
),
'diagnostics' => array(
'platform' => 'wp',
'platform_version' => get_bloginfo('version'),
'plugin_version' => Shareaholic::VERSION,
),
);
header('Content-Type: application/json; charset=utf-8');
echo json_encode($info);
exit;
}
/**
* Function to return related permalinks for a given permalink to bootstrap the Related Content app until the off-line processing routines complete
*
* @return list of related permalinks in JSON
*/
public static function permalink_related() {
global $post;
// Input Params
$permalink = isset($_GET['permalink']) ? $_GET['permalink'] : NULL;
$match = isset($_GET['match']) ? $_GET['match'] : "random"; // match method
$n = isset($_GET['n']) ? intval($_GET['n']) : 10; // number of related permalinks to return
$related_permalink_list = array();
// Get post ID
if ($permalink == NULL){
// default to random match if no permalink is available
$match = "random";
} else {
$post_id = url_to_postid($permalink);
// for non-default paths - handle both https and http versions of the permalink
if ($post_id == 0){
$parse = parse_url($permalink);
if ($parse['scheme'] == "https"){
$permalink = str_replace("https", "http", $permalink);
$post_id = url_to_postid($permalink);
} else if ($parse['scheme'] == "http"){
$permalink = str_replace("http", "https", $permalink);
$post_id = url_to_postid($permalink);
}
}
}
if ($match == "random"){
$args = array( 'posts_per_page' => $n, 'orderby' => 'rand' );
$rand_posts = get_posts( $args );
foreach ( $rand_posts as $post ){
$related_link = array(
'page_id' => $post->ID,
'url' => get_permalink($post->ID),
'title' => $post->post_title,
'description' => $post->post_excerpt,
'image_url' => ShareaholicUtilities::permalink_thumbnail($post->ID, "medium"),
'score' => 1
);
array_push($related_permalink_list, $related_link);
}
wp_reset_postdata();
} else {
// other methods coming soon
}
// Construct results array
$result = array(
'request' => array(
'api_key' => ShareaholicUtilities::get_option('api_key'),
'url' => $permalink,
),
'internal' => $related_permalink_list
);
header('Content-Type: application/json; charset=utf-8');
header('Cache-Control: max-age=180'); // 3 minutes
echo json_encode($result);
exit;
}
/**
* Checks to see if curl is installed
*
* @return bool true or false that curl is installed
*/
public static function has_curl(){
return function_exists('curl_version') && function_exists('curl_multi_init') && function_exists('curl_multi_add_handle') && function_exists('curl_multi_exec');
}
}
?>