.
*/
class TwitterFriendlyLinks {
var $settings = array();
var $defaultsettings = array();
var $notices = array();
function TwitterFriendlyLinks() {
global $tfl_version;
$this->defaultsettings = array(
'version' => 50,
'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,
'retweet_anywhere_fix' => false,
'ga_tracking' => '',
'html_shortlink_rel' => false,
'http_shortlink_rel' => false,
'rel_canonical' => false,
'tfl_core_notice' => 0,
);
// 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] = $value1;
}
}
}
// Register general hooks
add_filter('template_redirect', array(&$this, 'template_redirect'), 10, 2);
add_action('admin_menu', array(&$this, 'admin_menu'));
add_action('admin_notices', array(&$this, 'admin_notices'));
add_filter("manage_posts_columns", array(&$this, "edit_columns"));
add_action("manage_posts_custom_column", array(&$this, "custom_columns"));
// 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['retweet_anywhere_fix'])
add_filter('retweet-anywhere-shorteners', 'tfl_retweet_anywhere_fix', 10, 1);
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 not use default).';
$this->form_data();
}
function edit_columns($columns)
{
$columns['tfl'] = 'Twitter Link';
return $columns;
}
function custom_columns($column)
{
global $post;
if ($column == 'tfl')
{
echo '' . twitter_link() . '';
}
}
function form_data()
{
if (isset($_POST['twitter-friendly-links-submit']))
{
$this->settings['style'] = $_POST['style'];
$this->settings['format'] = $_POST['format'];
$this->settings['redirect'] = $_POST['redirect'];
$this->settings['shortlink_base'] = $_POST['shortlink_base'];
$this->settings['posts_enabled'] = ($_POST['posts_enabled'] == 'checked') ? true : false;
$this->settings['pages_enabled'] = ($_POST['pages_enabled'] == 'checked') ? true : false;
$this->settings['attachments_enabled'] = ($_POST['attachments_enabled'] == 'checked') ? true : false;
$this->settings['twitter_tools_fix'] = ($_POST['twitter_tools_fix'] == 'checked') ? true : false;
$this->settings['askapache_google_404'] = ($_POST['askapache_google_404'] == 'checked') ? true : false;
$this->settings['tweet_this_fix'] = ($_POST['tweet_this_fix'] == 'checked') ? true : false;
$this->settings['sociable_fix'] = ($_POST['sociable_fix'] == 'checked') ? true : false;
$this->settings['retweet_anywhere_fix'] = ($_POST['retweet_anywhere_fix'] == 'checked') ? true : false;
$this->settings['ga_tracking'] = $_POST['ga_tracking'];
$this->settings['html_shortlink_rel'] = ($_POST['html_shortlink_rel'] == 'checked') ? true : false;
$this->settings['http_shortlink_rel'] = ($_POST['http_shortlink_rel'] == 'checked') ? true : false;
$this->settings['rel_canonical'] = ($_POST['rel_canonical'] == 'checked') ? true : false;
$this->save_settings();
$this->notices[] = 'Your settings have been saved!';
}
}
function save_settings()
{
update_option('twitter_friendly_links', $this->settings);
return true;
}
function wp_head()
{
// Mainly for relations
if (($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($requested_url=null, $do_redirect=true) {
global $wp;
global $wp_query;
if (is_404())
{
$style = $this->settings["style"];
$format = $this->settings["format"];
$redirect = $this->settings["redirect"];
$ga_tracking = (strlen($this->settings["ga_tracking"]) > 1) ? "?".$this->settings["ga_tracking"] : "";
$request = $wp->request;
if (ereg("^{$style}([0-9a-z]+)/?$", $request, $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))
{
global $wp_query;
$posts = new WP_Query("p=$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"] && $post->post_type == "attachment") return;
status_header(200);
wp_redirect(get_permalink().$ga_tracking, $redirect);
exit();
}
}
}
}
elseif (is_singular())
{
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_menu() {
$twitter_friendly_admin = add_options_page('Twitter Friendly Links', 'Twitter Friendly Links', 8, __FILE__, array(&$this, 'options'));
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");
}
function options() {
$style = $this->settings["style"];
$format = $this->settings["format"];
$redirect = $this->settings["redirect"];
$shortlink_base = $this->settings["shortlink_base"];
$posts_enabled = ($this->settings["posts_enabled"]) ? "checked" : "";
$pages_enabled = ($this->settings["pages_enabled"]) ? "checked" : "";
$attachments_enabled = ($this->settings["attachments_enabled"]) ? "checked" : "";
$twitter_tools_fix = ($this->settings["twitter_tools_fix"]) ? "checked" : "";
$askapache_google_404 = ($this->settings["askapache_google_404"]) ? "checked" : "";
$tweet_this_fix = ($this->settings["tweet_this_fix"]) ? "checked" : "";
$sociable_fix = ($this->settings["sociable_fix"]) ? "checked" : "";
$retweet_anywhere_fix = ($this->settings['retweet_anywhere_fix']) ? 'checked' : '';
$ga_tracking = $this->settings["ga_tracking"];
$html_shortlink_rel = ($this->settings["html_shortlink_rel"]) ? "checked" : "";
$http_shortlink_rel = ($this->settings["http_shortlink_rel"]) ? "checked" : "";
$rel_canonical = ($this->settings["rel_canonical"]) ? "checked" : "";
$selected[$redirect] = " selected=\"selected\"";
$selected[$format] = " selected=\"selected\"";
if ($format == "generic") $link_preview = "123";
elseif ($format = "base32") $link_preview = "7e1";
?>
Twitter Friendly Links Setup
General Settings
Make sure you get this right from the first time because changing this afterward will affect all your previous twitter friendly links and you're most likely to get 404 error messages on your old links. For more information please visit Twitter Friendly Links.
";
}
function admin_notices()
{
$this->notices = array_unique($this->notices);
foreach($this->notices as $key => $value)
{
echo '
Twitter Friendly Links: ' . $value . '
';
}
}
}
add_action('init', 'TwitterFriendlyLinks'); function TwitterFriendlyLinks() { global $TwitterFriendlyLinks; $TwitterFriendlyLinks = new TwitterFriendlyLinks(); }
/**
* Returns a Twitter Friendly link using the ID of a post
*
* @param int $post_id Optional. The ID of the post you'd like a Twitter Friendly link for. If not supplied, taken from The_Loop
* @return string Returns the Twitter Friendly link
*/
function twitter_link($post_id = 0) {
$options = get_option('twitter_friendly_links');
$style = $options['style'];
$home = $options['shortlink_base'];
if ($post_id == 0)
{
global $post;
$post_id = $post->ID;
}
if ($options['format'] == 'base32')
$friendly_link = $home . '/' . $style . tfl_base32($post_id);
else
$friendly_link = $home . '/' . $style . $post_id;
return $friendly_link;
}
/**
* Returns a Twitter Friendly link using the permalink of a post
*
* @param string $permalink The URL of the permalink that should be converted to a Twitter Friendly link
* @return string Returns the Twitter Friendly link
*/
function permalink_to_twitter_link($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 $content;
}
function tfl_retweet_anywhere_fix($shorteners)
{
$shorteners['twitter-friendly-links'] = array(
'name' => 'Twitter Friendly Links',
'callback' => 'permalink_to_twitter_link'
);
return $shorteners;
}
function tfl_base32($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 $post_id;
}
}
if (!function_exists("utf8_strlen")) {
function utf8_strlen($s) {
$c = strlen($s); $l = 0;
for ($i = 0; $i < $c; ++$i) if ((ord($s[$i]) & 0xC0) != 0x80) ++$l;
return $l;
}
}