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<?php |
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/* |
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Plugin Name: Hum |
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Plugin URI: http://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: http://willnorris.com/ |
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Version: 1.1 |
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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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|
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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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|
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/** |
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* Accept hum query variables. |
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*/ |
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function hum_query_vars( $vars ) { |
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$vars[] = 'hum'; |
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return $vars; |
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} |
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add_action('query_vars', 'hum_query_vars'); |
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|
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|
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/** |
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* Parse request for shortlink. |
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* |
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* @uses do_action() Calls 'hum_request_{$type}" action |
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* @uses do_action() Calls 'hum_request" action |
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*/ |
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function hum_parse_request( $wp ) { |
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if ( array_key_exists( 'hum', $wp->query_vars ) ) { |
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list($type, $id) = explode('/', $wp->query_vars['hum'], 2); |
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do_action("hum_request_{$type}", $id); |
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do_action('hum_request', $type, $id); |
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|
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// hum hasn't handled the request yet, so try again but strip common |
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// punctuation that might appear after a URL in written text: . , ) |
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$clean_id = preg_replace('/[\.,\)]+$/', '', $id); |
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if ($id != $clean_id) { |
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do_action("hum_request_{$type}", $clean_id); |
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do_action('hum_request', $type, $clean_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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add_action('parse_request', 'hum_parse_request'); |
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|
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|
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/** |
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* Redirect shortlinks that are for content hosted directly within WordPress. |
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* The 'id' portion of these URLs is expected to be the sexagesimal post ID. |
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* |
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* @uses apply_filters() Calls 'hum_local_types' filter on prefixes for local |
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* WordPress hosted content |
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* @param string $code the content-type prefix |
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*/ |
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function hum_redirect_local( $type, $id ) { |
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$local_types = array('b', 't'); |
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$local_types = apply_filters('hum_local_types', $local_types); |
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|
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if ( in_array($type, $local_types) ) { |
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$p = sxg_to_num( $id ); |
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$permalink = get_permalink($p); |
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|
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if ( $permalink ) { |
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wp_redirect( $permalink, 301 ); |
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exit; |
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} |
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} |
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} |
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add_filter('hum_request', 'hum_redirect_local', 20, 2); |
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|
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|
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/** |
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* Handles /i/ URLs that have ISBN or ASIN subpaths by redirecting to Amazon. |
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* |
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* @uses do_action() Calls 'hum_request_i_{$subtype}' action |
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* @uses apply_filters() Calls 'amazon_affiliate_id' filter |
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* |
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* @param string $path subpath of URL (after /i/) |
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*/ |
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function hum_request_i( $path ) { |
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list($subtype, $id) = preg_split('|/|', $path, 2); |
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do_action("hum_request_i_{$subtype}", $id); |
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switch ($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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$amazon_id = apply_filters('amazon_affiliate_id', false); |
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if ($amazon_id) { |
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wp_redirect('http://www.amazon.com/gp/redirect.html?ie=UTF8&location=' |
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. 'http%3A%2F%2Fwww.amazon.com%2Fdp%2F' . $id . '&tag=' . $amazon_id |
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. '&linkCode=ur2&camp=1789&creative=9325'); |
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} else { |
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wp_redirect('http://www.amazon.com/dp/' . $id ); |
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} |
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exit; |
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break; |
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} |
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} |
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add_filter('hum_request_i', 'hum_request_i', 20); |
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|
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|
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/** |
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* Allow for simple redirect rules for shortlink prefixes. Users can provide a |
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* filter to perform simple URL redirect for a given type prefix. For example, |
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* to redirect all /w/ shortlinks to your personal PBworks wiki, you could use: |
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* |
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* add_filter('hum_redirect_base_w', |
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* create_function('', 'return "http://willnorris.pbworks.com/";')); |
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* |
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* @uses apply_filters() Calls 'hum_redirect_base_{$type}' filter on redirect base URL |
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*/ |
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function hum_redirect_request( $type, $id ) { |
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$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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wp_redirect( $url ); |
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exit; |
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} |
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} |
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add_action('hum_request', 'hum_redirect_request', 30, 2); |
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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 object $wp_rewrite |
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*/ |
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function hum_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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add_action('generate_rewrite_rules', 'hum_rewrite_rules'); |
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|
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|
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/** |
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* Flush wp_rewrite rules. |
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*/ |
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function hum_flush_rewrite_rules() { |
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global $wp_rewrite; |
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$wp_rewrite->flush_rules(); |
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} |
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register_activation_hook(__FILE__, 'hum_flush_rewrite_rules'); |
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register_deactivation_hook(__FILE__, 'hum_flush_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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* @return string |
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*/ |
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function hum_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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/** |
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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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function _config_hum_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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add_filter('pre_option_hum_shortlink_base', '_config_hum_shortlink_base'); |
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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 $allow_slugs |
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* @return string |
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*/ |
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function hum_get_shortlink($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( hum_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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$type = hum_type_prefix($post_id); |
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$sxg_id = num_to_sxg($post_id); |
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$link = trailingslashit( hum_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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add_filter('pre_get_shortlink', 'hum_get_shortlink', 10, 4); |
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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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function hum_type_prefix( $post ) { |
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$prefix = 'b'; |
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|
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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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$prefix = 't'; break; |
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case 'status': |
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$prefix = 't'; break; |
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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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// Admin Settings |
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|
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|
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/** |
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* Register admin settings for Hum. |
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*/ |
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function hum_admin_init() { |
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register_setting('general', 'hum_shortlink_base'); |
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} |
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add_action('admin_init', 'hum_admin_init'); |
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|
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|
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/** |
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* Add admin settings fields for Hum. |
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*/ |
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function hum_admin_menu() { |
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add_settings_field('hum_shortlink_base', __('Shortlink Base (URL)', 'hum'), 'hum_admin_shortlink_base', 'general'); |
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} |
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add_action('admin_menu', 'hum_admin_menu'); |
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|
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|
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/** |
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* Admin UI for setting the shortlink base URL. |
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*/ |
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function hum_admin_shortlink_base() { |
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?> |
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<input name="hum_shortlink_base" type="text" id="hum_shortlink_base" value="<?php form_option('hum_shortlink_base'); ?>"<?php disabled( defined( 'HUM_SHORTLINK_BASE') ); ?> class="regular-text code<?php if ( defined( 'HUM_SHORTLINK_BASE') ) echo ' disabled' ?>" /> |
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<p class="description"> |
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If you have a custom domain you want to use for shortlinks, enter the address here. |
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</p> |
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|
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<script> |
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// move adjacent to other URL properties |
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jQuery('input#hum_shortlink_base').parents('tr') |
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.insertAfter( jQuery('input#home').parents('tr') ); |
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</script> |
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<?php |
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} |
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|
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|
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// New Base 60 - see http://ttk.me/w/NewBase60 |
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// |
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// slightly modified from Cassis Project (http://cassisproject.com/) |
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// Copyright 2010 Tantek Çelik, released under Creative Commons by-sa 3.0 |
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|
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if ( !function_exists( 'num_to_sxg' ) ): |
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/** |
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* Convert base-10 number to sexagesimal. |
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*/ |
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function num_to_sxg($n) { |
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$s = ""; |
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$m = "0123456789ABCDEFGHJKLMNPQRSTUVWXYZ_abcdefghijkmnopqrstuvwxyz"; |
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if ($n===null || $n===0) { return 0; } |
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while ($n>0) { |
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$d = $n % 60; |
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$s = $m[$d] . $s; |
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$n = ($n-$d)/60; |
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} |
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return $s; |
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} |
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endif; |
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|
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|
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if ( !function_exists( 'sxg_to_num' ) ): |
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/** |
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* Convert sexagesimal to base-10 number. |
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*/ |
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function sxg_to_num($s) { |
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$n = 0; |
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$j = strlen($s); |
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for ($i=0;$i<$j;$i++) { // iterate from first to last char of $s |
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$c = ord($s[$i]); // put current ASCII of char into $c |
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if ($c>=48 && $c<=57) { $c=$c-48; } |
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else if ($c>=65 && $c<=72) { $c-=55; } |
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else if ($c==73 || $c==108) { $c=1; } // typo capital I, lowercase l to 1 |
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else if ($c>=74 && $c<=78) { $c-=56; } |
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else if ($c==79) { $c=0; } // error correct typo capital O to 0 |
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else if ($c>=80 && $c<=90) { $c-=57; } |
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else if ($c==95) { $c=34; } // underscore |
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else if ($c>=97 && $c<=107) { $c-=62; } |
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else if ($c>=109 && $c<=122) { $c-=63; } |
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else { $c = 0; } // treat all other noise as 0 |
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$n = 60*$n + $c; |
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} |
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return $n; |
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} |
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endif; |
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|
