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<?php |
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/* |
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Plugin Name: Hum |
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Plugin URI: https://github.com/willnorris/wordpress-hum |
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Description: Personal URL shortener for WordPress |
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Author: Will Norris |
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Author URI: https://willnorris.com/ |
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Version: 1.2.1 |
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License: MIT (http://opensource.org/licenses/MIT) |
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Text Domain: hum |
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*/ |
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|
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class Hum { |
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|
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public function __construct() { |
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add_action('init', array( $this, 'init' )); |
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|
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register_activation_hook(__FILE__, 'flush_rewrite_rules'); |
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register_deactivation_hook(__FILE__, 'flush_rewrite_rules'); |
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} |
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|
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/** |
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* Initialize the plugin, registering WordPress hooks. |
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*/ |
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public function init() { |
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load_plugin_textdomain( 'hum', null, basename( dirname( __FILE__ ) ) ); |
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|
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// if you have hum installed, then you probably actually care about short |
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// links, so we'll add it to the admin menu bar. |
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add_action('admin_bar_menu', 'wp_admin_bar_shortlink_menu', 90); |
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|
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add_action('query_vars', array( $this, 'query_vars' )); |
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add_action('parse_request', array( $this, 'parse_request' )); |
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add_filter('hum_redirect', array( $this, 'redirect_request' ), 10, 3); |
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add_filter('hum_redirect_i', array( $this, 'redirect_request_i' ), 10, 2); |
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add_filter('hum_process_redirect', array( $this, 'process_redirect' ), 10, 2); |
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add_action('generate_rewrite_rules', array( $this, 'rewrite_rules' )); |
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add_filter('pre_option_hum_shortlink_base', array( $this, 'config_shortlink_base' )); |
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add_filter('pre_get_shortlink', array( $this, 'get_shortlink' ), 10, 4); |
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add_filter('template_redirect', array( $this, 'legacy_redirect' )); |
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add_filter('hum_legacy_id', array( $this, 'legacy_ftl_id' ), 10, 2); |
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add_action('atom_entry', array( $this, 'shortlink_atom_entry' )); |
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|
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// Admin Settings |
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add_action('admin_init', array( $this, 'admin_init' )); |
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add_action('admin_menu', array( $this, 'admin_menu' )); |
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} |
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|
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/** |
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* Accept hum query variables. |
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*/ |
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public function query_vars( $vars ) { |
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$vars[] = 'hum'; |
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return $vars; |
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} |
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|
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/** |
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* Parse request for shortlink. This is the main entry point for handling |
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* short URLs. |
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* |
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* @uses apply_filters() Calls 'hum_redirect' filter |
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* @uses apply_filters() Calls 'hum_process_redirect' filter |
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* |
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* @param WP $wp the WordPress environment for the request |
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*/ |
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public function parse_request( $wp ) { |
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if ( array_key_exists( 'hum', $wp->query_vars ) ) { |
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$hum_path = $wp->query_vars['hum']; |
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if ( strpos($hum_path, '/') !== false ) { |
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list($type, $id) = explode('/', $hum_path, 2); |
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} else { |
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$type = $hum_path; |
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$id = null; |
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} |
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|
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$url = apply_filters('hum_redirect', null, $type, $id); |
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|
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// hum hasn't handled the request yet, so try again but strip common |
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// punctuation that might appear after a URL in written text: . , ) |
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if ( !$url ) { |
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$clean_id = preg_replace('/[\.,\)]+$/', '', $id); |
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if ($id != $clean_id) { |
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$url = apply_filters('hum_redirect', null, $type, $clean_id); |
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} |
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} |
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|
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if ( $url ) { |
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do_action('hum_process_redirect', $url, $id); |
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} |
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|
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// hum didn't handle request, so issue 404. |
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// manually setting query vars like this feels very fragile, but |
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// $wp_query->set_404() doesn't do what we need here. |
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$wp->query_vars['error'] = '404'; |
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} |
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} |
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|
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/** |
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* Process the redirect. |
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* |
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* @param string $url the permalink of the post |
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* @param string $id the requested post ID |
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*/ |
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public function process_redirect( $url, $id ) { |
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wp_redirect($url, 301); |
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exit; |
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} |
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|
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/** |
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* Get the short URL types that are handled locally by WordPress. |
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* |
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* @uses apply_filters() Calls 'hum_local_types' with array of local types |
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* |
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* @return array local types |
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*/ |
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public function local_types() { |
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$local_types = array('b', 't', 'a', 'p'); |
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return apply_filters('hum_local_types', $local_types); |
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} |
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|
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/** |
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* Attempt to handle redirect for the current shortlink. |
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* |
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* This redirects shortlinks that are for content hosted directly within |
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* WordPress. The 'id' portion of these URLs is expected to be the |
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* sexagesimal post ID. |
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* |
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* This also allows for simple redirect rules for shortlink prefixes. Users |
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* can provide a filter to perform simple URL redirect for a given type |
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* prefix. For example, to redirect all /w/ shortlinks to your personal |
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* PBworks wiki, you could use: |
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* |
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* add_filter('hum_redirect_base_w', |
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* create_function('', 'return "http://willnorris.pbworks.com/";')); |
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* |
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* @uses apply_filters() Calls 'hum_redirect_{$type}' action |
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* @uses apply_filters() Calls 'hum_redirect_base_{$type}' filter on redirect base URL |
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* |
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* @param string $url the short URL |
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* @param string $type the content-type prefix |
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* @param string $id the requested post ID |
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*/ |
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public function redirect_request( $url, $type, $id ) { |
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// locally hosted content |
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$local_types = $this->local_types(); |
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if ( in_array($type, $local_types) ) { |
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$p = sxg_to_num( $id ); |
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if ( $p ) { |
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$url = get_permalink( $p ); |
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} |
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} |
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|
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// simple redirects for entire base type |
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if ( !$url ) { |
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$url = apply_filters("hum_redirect_base_{$type}", false); |
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if ( $url ) { |
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$url = trailingslashit($url) . $id; |
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} |
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} |
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|
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$url = apply_filters("hum_redirect_{$type}", $url, $id); |
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return $url; |
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} |
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|
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/** |
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* Handles /i/ URLs that have ISBN or ASIN subpaths by redirecting to Amazon. |
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* |
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* @uses apply_filters() Calls 'hum_redirect_i_{$subtype}' action |
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* @uses apply_filters() Calls 'amazon_domain' filter |
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* @uses apply_filters() Calls 'amazon_affiliate_id' filter |
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* |
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* @param string $url the short URL |
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* @param string $path subpath of URL (after /i/) |
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*/ |
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public function redirect_request_i( $url, $path ) { |
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list($subtype, $id) = explode('/', $path, 2); |
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|
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if ( $subtype ) { |
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switch ($subtype) { |
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case 'a': |
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case 'asin': |
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case 'i': |
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case 'isbn': |
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$amazon_domain = apply_filters('amazon_domain', 'www.amazon.com'); |
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$amazon_id = apply_filters('amazon_affiliate_id', false); |
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if ($amazon_id) { |
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// valid partner shortlink, checked by |
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// https://partnernet.amazon.de/gp/associates/network/tools/link-checker/main.html |
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$url = 'http://' . $amazon_domain . '/dp/product/' . $id . '?tag=' . $amazon_id; |
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} else { |
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$url = 'http://' . $amazon_domain . '/dp/product/' . $id; |
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} |
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break; |
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} |
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$url = apply_filters("hum_redirect_i_{$subtype}", $url, $id); |
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} |
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return $url; |
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} |
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|
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/** |
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* Add rewrite rules for hum shortlinks. |
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* |
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* @param WP_Rewrite $wp_rewrite WordPress rewrite component. |
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*/ |
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public function rewrite_rules( $wp_rewrite ) { |
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$hum_rules = array( |
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'([a-z](/.*)?$)' => 'index.php?hum=$matches[1]', |
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); |
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|
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$wp_rewrite->rules = $hum_rules + $wp_rewrite->rules; |
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} |
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|
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/** |
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* Get the base URL for hum shortlinks. Defaults to the WordPress home url. |
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* Users can define HUM_SHORTLINK_BASE or provide a filter to use a custom |
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* domain for shortlinks. |
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* |
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* @uses apply_filters() Calls 'hum_shortlink_base' filter on base URL |
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* |
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* @return string |
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*/ |
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public function shortlink_base() { |
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$base = get_option('hum_shortlink_base'); |
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if ( empty( $base ) ) { |
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$base = home_url(); |
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} |
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return apply_filters( 'hum_shortlink_base', $base ); |
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} |
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|
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/** |
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* Allow the constant named 'HUM_SHORTLINK_BASE' to override the base URL for shortlinks. |
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* |
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* @param string $url the short URL |
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*/ |
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public function config_shortlink_base( $url = '' ) { |
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if ( defined( 'HUM_SHORTLINK_BASE') ) { |
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return untrailingslashit( HUM_SHORTLINK_BASE ); |
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} |
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return $url; |
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} |
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|
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/** |
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* Get the shortlink for a post, page, attachment, or blog. |
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* |
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* @param string $link the current shortlink for the post |
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* @param int $id post ID |
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* @param string $context |
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* @param boolean $allow_slugs |
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* @return string |
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*/ |
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public function get_shortlink($link, $id, $context, $allow_slugs) { |
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$post_id = 0; |
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if ( 'query' == $context ) { |
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if ( is_front_page() ) { |
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$link = trailingslashit( $this->shortlink_base() ); |
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} elseif ( is_singular() ) { |
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$post_id = get_queried_object_id(); |
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} |
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} elseif ( 'post' == $context ) { |
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$post = get_post($id); |
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$post_id = $post->ID; |
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} |
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|
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if ( !empty($post_id) ) { |
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$type = $this->type_prefix($post_id); |
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$sxg_id = num_to_sxg($post_id); |
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$link = trailingslashit( $this->shortlink_base() ) . $type . '/' . $sxg_id; |
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} |
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|
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return $link; |
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} |
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|
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/** |
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* Get the content-type prefix for the specified post. |
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* |
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* @see http://ttk.me/w/Whistle#design |
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* @uses apply_filters() Calls 'hum_type_prefix' on the content type prefix |
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* |
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* @param int|object $post A post |
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* @return string the content type prefix for the post |
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*/ |
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public function type_prefix( $post ) { |
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$prefix = 'b'; |
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|
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$post_type = get_post_type( $post ); |
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|
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if ( $post_type == 'attachment' ) { |
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// check if $post is a WP_Post or an ID |
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if (is_numeric($post)) { |
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$post_id = $post; |
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} else { |
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$post_id = $post->ID; |
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} |
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|
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$mime_type = get_post_mime_type( $post_id ); |
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$media_type = preg_replace("/(\/[a-zA-Z]+)/i", "", $mime_type); |
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|
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switch ($media_type) { |
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case 'audio': |
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case 'video': |
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$prefix = 'a'; break; |
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case 'image': |
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$prefix = 'p'; break; |
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} |
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|
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// @todo add support for slides |
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} else { |
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$post_format = get_post_format( $post ); |
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switch($post_format) { |
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case 'aside': |
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case 'status': |
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case 'link': |
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$prefix = 't'; break; |
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case 'audio': |
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case 'video': |
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$prefix = 'a'; break; |
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case 'photo': |
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case 'gallery': |
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case 'image': |
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$prefix = 'p'; break; |
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} |
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} |
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|
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return apply_filters('hum_type_prefix', $prefix, $post); |
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} |
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|
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/** |
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* Support redirects from legacy short URL schemes. This allows users to migrate from other |
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* shortlink generaters, but still have hum support the old URLs. |
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* |
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* @uses do_action() Calls 'hum_legacy_id' with the post ID and shortlink path. |
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*/ |
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public function legacy_redirect() { |
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if ( is_404() ) { |
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global $wp; |
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$post_id = apply_filters('hum_legacy_id', 0, $wp->request); |
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if ( $post_id ) { |
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$url = get_permalink($post_id); |
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if ( $url ) { |
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$url = apply_filters('hum_legacy_redirect', $url); |
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wp_redirect($url, 301); |
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exit; |
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} |
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} |
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} |
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} |
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|
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/** |
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* Handle shortlinks generated by Friendly Twitter Links, which take the form |
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* /{id}, where {id} can be the base10 or base32 post ID. |
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* |
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* @param int $id post ID to filter on |
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* @param string $path URL path (without preceding slash) of the request |
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* |
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* @return string ID of post to redirect to |
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*/ |
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public function legacy_ftl_id($id, $path) { |
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if ( is_numeric($path) ) { |
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$post = get_post($path); |
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} else { |
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$post_id = base_convert($path, 32, 10); |
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$post = get_post($post_id); |
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} |
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|
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if ( $post ) { |
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$id = $post->ID; |
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} |
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|
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return $id; |
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} |
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|
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|
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// Admin Settings |
| 374 |
|
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/** |
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* Register admin settings for Hum. |
| 377 |
*/ |
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public function admin_init() { |
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register_setting('general', 'hum_shortlink_base'); |
| 380 |
} |
| 381 |
|
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/** |
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* Add admin settings fields for Hum. |
| 384 |
*/ |
| 385 |
public function admin_menu() { |
| 386 |
add_settings_field('hum_shortlink_base', __('Shortlink Base (URL)', 'hum'), |
| 387 |
array( $this, 'admin_shortlink_base'), 'general'); |
| 388 |
} |
| 389 |
|
| 390 |
/** |
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* Admin UI for setting the shortlink base URL. |
| 392 |
*/ |
| 393 |
public function admin_shortlink_base() { |
| 394 |
?> |
| 395 |
<input name="hum_shortlink_base" type="text" id="hum_shortlink_base" |
| 396 |
value="<?php form_option('hum_shortlink_base'); ?>" |
| 397 |
<?php disabled( defined( 'HUM_SHORTLINK_BASE') ); ?> |
| 398 |
class="regular-text code<?php if ( defined( 'HUM_SHORTLINK_BASE') ) echo ' disabled' ?>" /> |
| 399 |
<p class="description"> |
| 400 |
<?php _e('If you have a custom domain you want to use for shortlinks, enter the address here.', 'hum'); ?> |
| 401 |
</p> |
| 402 |
|
| 403 |
<script> |
| 404 |
// move adjacent to other URL properties |
| 405 |
jQuery('input#hum_shortlink_base').parents('tr') |
| 406 |
.insertAfter( jQuery('input#home').parents('tr') ); |
| 407 |
</script> |
| 408 |
<?php |
| 409 |
} |
| 410 |
|
| 411 |
/** |
| 412 |
* Add shortlink <link /> to Atom-Entry. |
| 413 |
*/ |
| 414 |
public function shortlink_atom_entry() { |
| 415 |
$shortlink = wp_get_shortlink(); |
| 416 |
if ( $shortlink ) { |
| 417 |
echo "\t\t" . '<link rel="shortlink" href="' . esc_attr( $shortlink ) . '" />' . PHP_EOL; |
| 418 |
} |
| 419 |
} |
| 420 |
} |
| 421 |
|
| 422 |
new Hum; |
| 423 |
|
| 424 |
|
| 425 |
// New Base 60 - see http://ttk.me/w/NewBase60 |
| 426 |
// |
| 427 |
// slightly modified from Cassis Project (http://cassisproject.com/) |
| 428 |
// Copyright 2010 Tantek Çelik, used with permission under CC0 license (http://git.io/tZ8fjw) |
| 429 |
|
| 430 |
if ( !function_exists( 'num_to_sxg' ) ): |
| 431 |
/** |
| 432 |
* Convert base-10 number to sexagesimal. |
| 433 |
*/ |
| 434 |
function num_to_sxg($n) { |
| 435 |
$s = ""; |
| 436 |
$m = "0123456789ABCDEFGHJKLMNPQRSTUVWXYZ_abcdefghijkmnopqrstuvwxyz"; |
| 437 |
if ($n===null || $n===0) { return 0; } |
| 438 |
while ($n>0) { |
| 439 |
$d = $n % 60; |
| 440 |
$s = $m[$d] . $s; |
| 441 |
$n = ($n-$d)/60; |
| 442 |
} |
| 443 |
return $s; |
| 444 |
} |
| 445 |
endif; |
| 446 |
|
| 447 |
|
| 448 |
if ( !function_exists( 'sxg_to_num' ) ): |
| 449 |
/** |
| 450 |
* Convert sexagesimal to base-10 number. |
| 451 |
*/ |
| 452 |
function sxg_to_num($s) { |
| 453 |
$n = 0; |
| 454 |
$j = strlen($s); |
| 455 |
for ($i=0;$i<$j;$i++) { // iterate from first to last char of $s |
| 456 |
$c = ord($s[$i]); // put current ASCII of char into $c |
| 457 |
if ($c>=48 && $c<=57) { $c=$c-48; } |
| 458 |
else if ($c>=65 && $c<=72) { $c-=55; } |
| 459 |
else if ($c==73 || $c==108) { $c=1; } // typo capital I, lowercase l to 1 |
| 460 |
else if ($c>=74 && $c<=78) { $c-=56; } |
| 461 |
else if ($c==79) { $c=0; } // error correct typo capital O to 0 |
| 462 |
else if ($c>=80 && $c<=90) { $c-=57; } |
| 463 |
else if ($c==95) { $c=34; } // underscore |
| 464 |
else if ($c>=97 && $c<=107) { $c-=62; } |
| 465 |
else if ($c>=109 && $c<=122) { $c-=63; } |
| 466 |
else { $c = 0; } // treat all other noise as 0 |
| 467 |
$n = 60*$n + $c; |
| 468 |
} |
| 469 |
return $n; |
| 470 |
} |
| 471 |
endif; |
| 472 |
|
