.
*/
class TwitterFriendlyLinks {
var $settings = array();
var $defaultsettings = array();
var $notices = array();
function TwitterFriendlyLinks() {
global $tfl_version;
$this->defaultsettings = array(
"version" => 45,
"style" => "", // default style is example.com/123
"format" => "generic", // default format is generic (numbers only)
"redirect" => 302, // temporary redirect by default
"posts_enabled" => true, // posts enabled by default
"pages_enabled" => false, // pages disabled by default
"attachments_enabled" => false, // attachments disabled by default
"shortlink_base" => get_option("home"),
"twitter_tools_fix" => false, // disabled by deafult
"askapache_google_404" => false,
"tweet_this_fix" => false,
"sociable_fix" => false,
"ga_tracking" => "",
"html_shortlink_rel" => false,
"http_shortlink_rel" => false,
"rel_canonical" => false,
"tfl_core_notice" => 0,
"cache_in_htaccess" => false,
"rewrite_rules" => array(),
);
// Setup the settings by using the default as a base and then adding in any changed values
// This allows settings arrays from old versions to be used even though they are missing values
$usersettings = (array) get_option("twitter_friendly_links");
if (!isset($usersettings["version"]))
$usersettings["version"] = 0;
$this->settings = $this->defaultsettings;
if ( $usersettings !== $this->defaultsettings ) {
foreach ( (array) $usersettings as $key1 => $value1 ) {
if ( is_array($value1) ) {
foreach ( $value1 as $key2 => $value2 ) {
$this->settings[$key1][$key2] = $value2;
}
} else {
$this->settings[$key1] = $value1;
}
}
}
// Register general hooks
add_action('template_redirect', array(&$this, 'template_redirect'), 9);
add_action("admin_menu", array(&$this, "admin_menu"));
add_action("admin_menu", array(&$this, "admin_menu_box"));
if ($this->settings["cache_in_htaccess"])
{
add_action('generate_rewrite_rules', array(&$this, 'generate_rewrite_rules'));
add_filter('mod_rewrite_rules', array(&$this, 'mod_rewrite_rules'));
add_action('publish_post', array(&$this, 'publish_post'));
}
// Filters and Actions
if ($this->settings["twitter_tools_fix"])
add_filter("tweet_blog_post_url", "permalink_to_twitter_link", 10, 1);
if ($this->settings["tweet_this_fix"])
add_filter("the_content", "tfl_tweet_this_fix", 10);
if ($this->settings["sociable_fix"])
add_filter("sociable_link", "tfl_sociable_fix");
if ($this->settings["html_shortlink_rel"] || $this->settings["rel_canonical"])
add_action("wp_head", array(&$this, "wp_head"));
// Notify the administrator if permalinks are switched off
$permalink_structure = (isset($_POST['permalink_structure'])) ? $_POST['permalink_structure'] : get_option("permalink_structure");
if ($permalink_structure == "")
$this->notices[] = "You have to change your permalink structure for Twitter Friendly Links to work (don't use default).";
if (!$this->settings["rewrite_rules_written"])
{
$this->notices[] = "Twitter Friendly Links has to rewrite your .htaccess file. Head over to the Permalinks section and click save.";
add_filter('mod_rewrite_rules', array(&$this, 'mod_rewrite_rules_fake'));
}
add_action("admin_notices", array(&$this, "admin_notices"));
}
function generate_rewrite_rules()
{
global $wp_rewrite;
$non_wp_rules = array();
if ($this->settings["posts_enabled"] && $this->settings["pages_enabled"])
$query = new WP_Query("posts_per_page=-1&post_type=any&post_status=publish");
elseif ($this->settings["posts_enabled"])
$query = new WP_Query("posts_per_page=-1&post_type=post&post_status=publish");
elseif ($this->settings["pages_enabled"])
$query = new WP_Query("posts_per_page=-1&post_type=page&post_status=publish");
else
return;
$ga_tracking = (strlen($this->settings["ga_tracking"]) > 1) ? "?".$this->settings["ga_tracking"] : "";
while ($query->have_posts())
{
$query->the_post();
$post_id = $query->post->ID;
$permalink = get_permalink();
$non_wp_rules[$post_id . '/?$tfl_rewrite'] = $permalink.$ga_tracking;
}
$wp_rewrite->non_wp_rules = $non_wp_rules + $wp_rewrite->non_wp_rules;
}
function mod_rewrite_rules($rules)
{
$rules = preg_replace("/^(RewriteRule \^[0-9]+\/\?\\$)tfl_rewrite (\/)(.*) (\[QSA,L\])$/im", "\\1 \\3 [R=301,L]", $rules);
return $rules;
}
function mod_rewrite_rules_fake($rules)
{
$this->settings["rewrite_rules_written"] = true;
$this->save_settings();
return $rules;
}
function save_settings()
{
update_option("twitter_friendly_links", $this->settings);
return true;
}
function publish_post($post_id)
{
global $wp_rewrite;
$wp_rewrite->flush_rules(true);
}
function wp_head()
{
// Mainly for relations
if (($this->settings["posts_enabled"] && is_single()) || ($this->settings["pages_enabled"] && is_page()) || ($this->settings["attachments_enabled"] && is_attachment()))
{
global $post;
$post_id = $post->ID;
if ($this->settings["html_shortlink_rel"])
{
$short_url = twitter_link($post_id);
echo "\n";
}
if ($this->settings["rel_canonical"])
{
$permalink = get_permalink($post_id);
echo "\n";
}
}
}
function template_redirect() {
$style = $this->settings["style"];
$format = $this->settings["format"];
$redirect = $this->settings["redirect"];
$ga_tracking = (strlen($this->settings["ga_tracking"]) > 1) ? "?".$this->settings["ga_tracking"] : "";
$uri = $_SERVER["REQUEST_URI"];
$home = $this->settings["shortlink_base"];
//$home = str_replace("http://".$_SERVER["SERVER_NAME"], "", $home);
$uri = strtolower(str_replace($home, "", $uri));
if (ereg("^/{$style}([0-9a-z]+)/?$", $uri, $regs))
{
// Fix for the AskApache Google 404 plugin
$this->settings["askapache_google_404"] = ($this->settings["askapache_google_404"] == "checked") ? true : false;
if ($this->settings["askapache_google_404"])
{
global $AskApacheGoogle404;
remove_action("template_redirect", array($AskApacheGoogle404, 'template_redirect'));
}
$post_id = $regs[1];
if ($format == "base32")
$post_id = tfl_base32($post_id, true);
if (is_numeric($post_id))
{
$posts = new WP_Query("p=$post_id&post_type=any");
if ($posts->have_posts())
{
$posts->the_post();
$post = $posts->post;
if (!$this->settings["posts_enabled"] && $post->post_type == "post") return;
if (!$this->settings["pages_enabled"] && $post->post_type == "page") return;
if (!$this->settings["attachments_enabled"] && $post->post_type == "attachment") return;
global $wp_query;
$wp_query->is_404 = false;
wp_redirect(get_permalink().$ga_tracking, $redirect);
}
}
}
global $post;
// Link relations
if ($this->settings["http_shortlink_rel"])
if (($this->settings["posts_enabled"] && is_single()) || ($this->settings["pages_enabled"] && is_page()) || ($this->settings["attachments_enabled"] && is_attachment()))
header("Link: <" . twitter_link($post_id) . ">; rel=shortlink");
}
function admin_scripts() {
$count_posts = wp_count_posts();
$total_posts = $count_posts->publish;
$count_pages = wp_count_posts('page');
$total_pages = $count_pages->publish;
$count_attachments = wp_count_posts('attachment');
$total_attachments = $count_attachments->inherit;
$plugin_url = trailingslashit(get_bloginfo('wpurl')).PLUGINDIR.'/'. dirname(plugin_basename(__FILE__));
wp_enqueue_script('twitterfriendly_navsettings', $plugin_url.'/js/nav_settings.js', array('jquery'));
wp_localize_script('twitterfriendly_navsettings', 'TwitterFriendly', array(
"plugin_url" => $plugin_url,
"total_posts" => $total_posts,
"total_pages" => $total_pages,
"total_attachments" => $total_attachments,
));
}
function admin_menu() {
$twitter_friendly_admin = add_options_page('Twitter Friendly Links', 'Twitter Friendly Links', 8, __FILE__, array(&$this, 'options'));
add_action("admin_print_scripts-$twitter_friendly_admin", array(&$this, "admin_scripts"));
}
function options() {
$plugin_dir = "../".PLUGINDIR.'/'. dirname( plugin_basename(__FILE__) );
require_once($plugin_dir . "/options.php");
}
function admin_menu_box() {
if (function_exists("add_meta_box")) {
add_meta_box("twitter_friendly_id", "Twitter Stuff", array(&$this, "admin_menu_inner_box"), "post", "side");
if ($this->settings["pages_enabled"]) add_meta_box("twitter_friendly_id", "Twitter Stuff", array(&$this, "admin_menu_inner_box"), "page", "side");
}
else {
add_action("dbx_post_advanced", array(&$this, "admin_menu_old_box"));
if ($this->settings["pages_enabled"]) add_action("dbx_page_advanced", array(&$this, "admin_menu_old_box"));
}
}
function admin_menu_old_box() {
echo '' . "\n";
echo '
\n";
}
function admin_menu_inner_box($post) {
if ($post->post_status != "publish") {
echo "Please publish to get Twitter links.
";
return;
}
$post_id = $post->ID;
$friendly_link = twitter_link($post_id);
$title_length = utf8_strlen($post->post_title);
$link_length = utf8_strlen($friendly_link);
$overall_length = $title_length + $link_length;
$excess = 140 - $overall_length;
if ($excess < 0) {
$excess *= -1;
$title = mb_substr($post->post_title,0,$title_length-($excess+4),'UTF-8') . "... ";
}
else {
$title = $post->post_title . " ";
}
echo "Friendly link: {$friendly_link}
";
echo "Tweet: {$title}{$friendly_link}
";
echo "Tweet this »
";
}
function admin_notices()
{
$this->notices = array_unique($this->notices);
foreach($this->notices as $key => $value)
{
echo "";
}
}
}
add_action("init", "TwitterFriendlyLinks"); function TwitterFriendlyLinks() { global $TwitterFriendlyLinks; $TwitterFriendlyLinks = new TwitterFriendlyLinks(); }
if (!function_exists("utf8_strlen")) {
function utf8_strlen($s) {
$c = strlen($s); $l = 0;
for ($i = 0; $i < $c; ++$i) if ((ord($s[$i]) & 0xC0) != 0x80) ++$l;
return $l;
}
}
function twitter_link($id = 0) {
$options = get_option("twitter_friendly_links");
$style = $options["style"];
$home = $options["shortlink_base"];
if ($id == 0)
{
global $post;
$post_id = $post->ID;
}
else
$post_id = $id;
if ($options["format"] == "base32")
$friendly_link = $home . "/" . $style . tfl_base32($post_id);
else
$friendly_link = $home . "/" . $style . $post_id;
return $friendly_link;
}
function permalink_to_twitter_link($permalink)
{
$post_id = url_to_postid($permalink);
return twitter_link($post_id);
}
function tfl_tweet_this_fix($content) {
global $post;
$twitter_link = twitter_link();
$content = preg_replace("/href=\\\"http:\/\/twitter.com\/home\/?\?status=([^\\\"]+)\\\"/", "href=\"http://twitter.com/home/?status=" . urlencode($post->post_title . " " . $twitter_link) . "\"", $content);
return $content;
}
function tfl_sociable_fix($content) {
global $post;
$twitter_link = twitter_link();
$content = preg_replace("/href=\\\"http:\/\/twitter.com\/home\/?\?status=([^\\\"]+)\\\"/", "href=\"http://twitter.com/home/?status=" . urlencode($post->post_title . " " . $twitter_link) . "\"", $content);
return $content;
}
function tfl_base32($str, $reverse = false) {
if (!$reverse)
{
$post_id = intval($str);
return base_convert($post_id + 10000, 10, 36);
}
else
{
$post_id = base_convert($str, 36, 10) - 10000;
return $post_id;
}
}
?>