| 1 |
<?php |
| 2 |
/* |
| 3 |
Plugin Name: Hum |
| 4 |
Plugin URI: http://github.com/willnorris/wordpress-hum |
| 5 |
Description: Whistle inspired URL shortener for WordPress |
| 6 |
Author: Will Norris |
| 7 |
Author URI: http://willnorris.com/ |
| 8 |
Version: 1.0 |
| 9 |
License: Dual GPL (http://www.fsf.org/licensing/licenses/info/GPLv2.html) and Modified BSD (http://www.fsf.org/licensing/licenses/index_html#ModifiedBSD) |
| 10 |
Text Domain: hum |
| 11 |
*/ |
| 12 |
|
| 13 |
|
| 14 |
/** |
| 15 |
* Accept hum query variables. |
| 16 |
*/ |
| 17 |
function hum_query_vars( $vars ) { |
| 18 |
$vars[] = 'hum'; |
| 19 |
return $vars; |
| 20 |
} |
| 21 |
add_action('query_vars', 'hum_query_vars'); |
| 22 |
|
| 23 |
|
| 24 |
/** |
| 25 |
* Parse request for shortlink. |
| 26 |
* |
| 27 |
* @uses do_action() Calls 'hum_request_{$type}" action |
| 28 |
* @uses do_action() Calls 'hum_request" action |
| 29 |
*/ |
| 30 |
function hum_parse_request( $wp ) { |
| 31 |
if ( array_key_exists( 'hum', $wp->query_vars ) ) { |
| 32 |
list($type, $id) = explode('/', $wp->query_vars['hum'], 2); |
| 33 |
do_action("hum_request_{$type}", $id); |
| 34 |
do_action('hum_request', $type, $id); |
| 35 |
} |
| 36 |
} |
| 37 |
add_action('parse_request', 'hum_parse_request'); |
| 38 |
|
| 39 |
|
| 40 |
/** |
| 41 |
* Redirect shortlinks that are for content hosted directly within WordPress. |
| 42 |
* The 'id' portion of these URLs is expected to be the sexagesimal post ID. |
| 43 |
* |
| 44 |
* @param string $code the content-type prefix |
| 45 |
*/ |
| 46 |
function hum_redirect_local( $type, $id ) { |
| 47 |
$local_types = array('b', 't'); |
| 48 |
|
| 49 |
if ( in_array($type, $local_types) ) { |
| 50 |
$p = sxg_to_num( $id ); |
| 51 |
$redirect = add_query_arg( 'p', $p, home_url() ); |
| 52 |
wp_redirect( $redirect, 301 ); |
| 53 |
exit; |
| 54 |
} |
| 55 |
} |
| 56 |
add_filter('hum_request', 'hum_redirect_local', 20, 2); |
| 57 |
|
| 58 |
|
| 59 |
/** |
| 60 |
* Allow for simple redirect rules for shortlink prefixes. Users can provide a |
| 61 |
* filter to perform simple URL redirect for a given type prefix. For example, |
| 62 |
* to redirect all /w/ shortlinks to your personal PBworks wiki, you could use: |
| 63 |
* |
| 64 |
* add_filter('hum_redirect_base_w', |
| 65 |
* create_function('', 'return "http://willnorris.pbworks.com/";')); |
| 66 |
* |
| 67 |
* @uses apply_filters() Calls 'hum_redirect_base_{$type}' filter on redirect base URL |
| 68 |
*/ |
| 69 |
function hum_redirect_request( $type, $id ) { |
| 70 |
$url = apply_filters("hum_redirect_base_{$type}", false); |
| 71 |
if ( $url ) { |
| 72 |
$url = trailingslashit($url) . $id; |
| 73 |
wp_redirect( $url ); |
| 74 |
exit; |
| 75 |
} |
| 76 |
} |
| 77 |
add_action('hum_request', 'hum_redirect_request', 30, 2); |
| 78 |
|
| 79 |
|
| 80 |
/** |
| 81 |
* Add rewrite rules for hum shortlinks. |
| 82 |
* |
| 83 |
* @param object $wp_rewrite |
| 84 |
*/ |
| 85 |
function hum_rewrite_rules( $wp_rewrite ) { |
| 86 |
$hum_rules = array( |
| 87 |
'([a-z]/.+)' => 'index.php?hum=$matches[1]', |
| 88 |
); |
| 89 |
|
| 90 |
$wp_rewrite->rules = $hum_rules + $wp_rewrite->rules; |
| 91 |
} |
| 92 |
add_action('generate_rewrite_rules', 'hum_rewrite_rules'); |
| 93 |
|
| 94 |
|
| 95 |
/** |
| 96 |
* Flush wp_rewrite rules. |
| 97 |
*/ |
| 98 |
function hum_flush_rewrite_rules() { |
| 99 |
global $wp_rewrite; |
| 100 |
$wp_rewrite->flush_rules(); |
| 101 |
} |
| 102 |
register_activation_hook(__FILE__, 'hum_flush_rewrite_rules'); |
| 103 |
register_deactivation_hook(__FILE__, 'hum_flush_rewrite_rules'); |
| 104 |
|
| 105 |
|
| 106 |
/** |
| 107 |
* Get the base URL for hum shortlinks. Defaults to the WordPress home url. |
| 108 |
* Users can provide a filter to use a custom domain for shortlinks. |
| 109 |
* |
| 110 |
* @uses apply_filters() Calls 'hum_shortlink_base' filter on base URL |
| 111 |
* @return string |
| 112 |
*/ |
| 113 |
function hum_shortlink_base() { |
| 114 |
return apply_filters( 'hum_shortlink_base', home_url() ); |
| 115 |
} |
| 116 |
|
| 117 |
|
| 118 |
/** |
| 119 |
* Get the shortlink for a post, page, attachment, or blog. |
| 120 |
* |
| 121 |
* @param string $link the current shortlink for the post |
| 122 |
* @param int $id post ID |
| 123 |
* @param string $context |
| 124 |
* @param boolean $allow_alugs |
| 125 |
* @return string |
| 126 |
*/ |
| 127 |
function hum_get_shortlink($link, $id, $context, $allow_slugs) { |
| 128 |
$post_id = 0; |
| 129 |
if ( 'query' == $context ) { |
| 130 |
if ( is_front_page() ) { |
| 131 |
$link = hum_shortlink_base(); |
| 132 |
} elseif ( is_singular() ) { |
| 133 |
$post_id = get_queried_object_id(); |
| 134 |
} |
| 135 |
} elseif ( 'post' == $context ) { |
| 136 |
$post = get_post($id); |
| 137 |
$post_id = $post->ID; |
| 138 |
} |
| 139 |
|
| 140 |
if ( !empty($post_id) ) { |
| 141 |
$type = hum_type_prefix($post_id); |
| 142 |
$sxg_id = num_to_sxg($post_id); |
| 143 |
$link = trailingslashit( hum_shortlink_base() ) . $type . '/' . $sxg_id; |
| 144 |
} |
| 145 |
|
| 146 |
return $link; |
| 147 |
} |
| 148 |
add_filter('pre_get_shortlink', 'hum_get_shortlink', 10, 4); |
| 149 |
|
| 150 |
|
| 151 |
/** |
| 152 |
* Get the content-type prefix for the specified post. |
| 153 |
* |
| 154 |
* @see http://ttk.me/w/Whistle#design |
| 155 |
* @uses apply_filters() Calls 'hum_type_prefix' on the content type prefix |
| 156 |
* |
| 157 |
* @param int|object $post A post |
| 158 |
* @return string the content type prefix for the post |
| 159 |
*/ |
| 160 |
function hum_type_prefix( $post ) { |
| 161 |
$prefix = 'b'; |
| 162 |
|
| 163 |
$post_format = get_post_format( $post ); |
| 164 |
switch($post_format) { |
| 165 |
case 'aside': |
| 166 |
$prefix = 't'; break; |
| 167 |
case 'status': |
| 168 |
$prefix = 't'; break; |
| 169 |
} |
| 170 |
|
| 171 |
return apply_filters('hum_type_prefix', $prefix, $post); |
| 172 |
} |
| 173 |
|
| 174 |
|
| 175 |
// New Base 60 - see http://ttk.me/w/NewBase60 |
| 176 |
// |
| 177 |
// slightly modified from Cassis Project (http://cassisproject.com/) |
| 178 |
// Copyright 2010 Tantek Çelik, released under Creative Commons by-sa 3.0 |
| 179 |
|
| 180 |
if ( !function_exists( 'num_to_sxg' ) ): |
| 181 |
/** |
| 182 |
* Convert base-10 number to sexagesimal. |
| 183 |
*/ |
| 184 |
function num_to_sxg($n) { |
| 185 |
$s = ""; |
| 186 |
$m = "0123456789ABCDEFGHJKLMNPQRSTUVWXYZ_abcdefghijkmnopqrstuvwxyz"; |
| 187 |
if ($n===null || $n===0) { return 0; } |
| 188 |
while ($n>0) { |
| 189 |
$d = $n % 60; |
| 190 |
$s = $m[$d] . $s; |
| 191 |
$n = ($n-$d)/60; |
| 192 |
} |
| 193 |
return $s; |
| 194 |
} |
| 195 |
endif; |
| 196 |
|
| 197 |
|
| 198 |
if ( !function_exists( 'sxg_to_num' ) ): |
| 199 |
/** |
| 200 |
* Convert sexagesimal to base-10 number. |
| 201 |
*/ |
| 202 |
function sxg_to_num($s) { |
| 203 |
$n = 0; |
| 204 |
$j = strlen($s); |
| 205 |
for ($i=0;$i<$j;$i++) { // iterate from first to last char of $s |
| 206 |
$c = ord($s[$i]); // put current ASCII of char into $c |
| 207 |
if ($c>=48 && $c<=57) { $c=$c-48; } |
| 208 |
else if ($c>=65 && $c<=72) { $c-=55; } |
| 209 |
else if ($c==73 || $c==108) { $c=1; } // typo capital I, lowercase l to 1 |
| 210 |
else if ($c>=74 && $c<=78) { $c-=56; } |
| 211 |
else if ($c==79) { $c=0; } // error correct typo capital O to 0 |
| 212 |
else if ($c>=80 && $c<=90) { $c-=57; } |
| 213 |
else if ($c==95) { $c=34; } // underscore |
| 214 |
else if ($c>=97 && $c<=107) { $c-=62; } |
| 215 |
else if ($c>=109 && $c<=122) { $c-=63; } |
| 216 |
else { $c = 0; } // treat all other noise as 0 |
| 217 |
$n = 60*$n + $c; |
| 218 |
} |
| 219 |
return $n; |
| 220 |
} |
| 221 |
endif; |
| 222 |
|
