235 lines
7.6 KiB
PHP
235 lines
7.6 KiB
PHP
<?php
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/************************************************************
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* Goélette Web Agency http://www.goelette.net/
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*
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* Copyright (c)2005 Goélette
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* Version 0.30
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* Released under the GNU General Public License
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*
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************************************************************/
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if (IN_serendipity !== true) {
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die ("Don't hack!");
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}
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// Probe for a language include with constants. Still include defines later on, if some constants were missing
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$probelang = dirname(__FILE__) . '/' . $serendipity['charset'] . 'lang_' . $serendipity['lang'] . '.inc.php';
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if (file_exists($probelang)) {
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include $probelang;
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}
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include dirname(__FILE__) . '/lang_en.inc.php';
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class serendipity_plugin_pagerank extends serendipity_plugin
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{
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var $title = PLUGIN_PAGERANK_NAME;
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function introspect(&$propbag)
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{
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global $serendipity;
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$propbag->add('name', PLUGIN_PAGERANK_NAME);
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$propbag->add('description', PLUGIN_PAGERANK_DETAIL);
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$propbag->add('stackable', false);
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$propbag->add('author', 'Christian Lescuyer');
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$propbag->add('version', '0.33');
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$propbag->add('requirements', array(
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'serendipity' => '0.8',
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'smarty' => '2.6.7',
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'php' => '4.1.0'
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));
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$propbag->add('groups', array('FRONTEND_EXTERNAL_SERVICES'));
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$properties = array('page_count', 'this_page');
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// Warning: loop starts at 1
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for ($i = 1, $n = @$this->get_config('page_count'); $i <= $n; ++$i) {
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$properties[] = 'page' . $i;
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$properties[] = 'capt' . $i;
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}
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$propbag->add('configuration', $properties);
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return true;
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}
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function introspect_config_item($name, &$propbag)
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{
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global $serendipity;
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if ($name == 'page_count') {
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$propbag->add('type', 'string');
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$propbag->add('name', PLUGIN_PAGERANK_PAGE_COUNT);
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$propbag->add('description', PLUGIN_PAGERANK_PAGE_COUNT_DESC);
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$propbag->add('default', '1');
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} else if ($name == 'this_page') {
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$propbag->add('type', 'radio');
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$propbag->add('name', PLUGIN_PAGERANK_THIS_PAGE);
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$propbag->add('description', PLUGIN_PAGERANK_THIS_PAGE_DESC);
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$propbag->add('radio', array(
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'value' => array('yes', 'no'),
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'desc' => array(PLUGIN_PAGERANK_THIS_PAGE_YES, PLUGIN_PAGERANK_THIS_PAGE_NO)));
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$propbag->add('default', 'yes');
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} else if (substr($name, 0, 4) == 'page') {
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$index = substr($name, 4);
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$propbag->add('type', 'string');
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$propbag->add('name', sprintf(PLUGIN_PAGERANK_PAGE_URL, $index));
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$propbag->add('description', sprintf(PLUGIN_PAGERANK_PAGE_URL_DESC, $index));
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$propbag->add('default', 'http://' . $_SERVER['SERVER_NAME'] . '/');
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} else if (substr($name, 0, 4) == 'capt') {
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$index = substr($name, 4);
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$propbag->add('type', 'string');
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$propbag->add('name', sprintf(PLUGIN_PAGERANK_PAGE_CAPTION, $index));
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$propbag->add('default', 'Page d\'accueil');
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} else {
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return false;
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}
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return true;
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}
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function generate_content(&$title)
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{
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global $serendipity;
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$title = $this->title;
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print '<ul>';
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// PR for the current page
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if ($this->get_config('this_page') == 'yes') {
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$page = $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'];
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print '<li>' . PLUGIN_PAGERANK_THIS_PAGE_CAPTION . ': ';
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print '<span class="PageRank">' . $this->getrank($page) . '</span></li>';
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}
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// Warning: loop starts at 1
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for ($i = 1, $n = $this->get_config('page_count'); $i <= $n; ++$i) {
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$caption = $this->get_config('capt' . $i);
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$page = $this->get_config('page' . $i);
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print '<li>' . $caption . ': ';
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print '<span class="PageRank">' . $this->getrank($page) . '</span></li>';
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}
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print '</ul>';
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}
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/*
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* Algorithm lifted from "Google Checksum Algorithm 2.0.114 (PHP Source)"
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* written and contributed by Alex Stapleton, Andy Doctorow, Tarakan,
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* Bill Zeller, Vijay "Cyberax" Bhatter, traB
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* Straightened up by Christian Lescuyer
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*
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*/
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//unsigned shift right
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function zeroFill($a, $b)
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{
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$z = hexdec(80000000);
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if ($z & $a) {
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$a = ($a>>1);
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$a &= (~$z);
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$a |= 0x40000000;
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$a = ($a>>($b-1));
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} else {
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$a = ($a>>$b);
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}
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return $a;
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}
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function mix($a, $b, $c)
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{
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$a -= $b; $a -= $c; $a ^= ($this->zeroFill($c,13));
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$b -= $c; $b -= $a; $b ^= ($a<<8);
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$c -= $a; $c -= $b; $c ^= ($this->zeroFill($b,13));
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$a -= $b; $a -= $c; $a ^= ($this->zeroFill($c,12));
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$b -= $c; $b -= $a; $b ^= ($a<<16);
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$c -= $a; $c -= $b; $c ^= ($this->zeroFill($b,5));
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$a -= $b; $a -= $c; $a ^= ($this->zeroFill($c,3));
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$b -= $c; $b -= $a; $b ^= ($a<<10);
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$c -= $a; $c -= $b; $c ^= ($this->zeroFill($b,15));
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return array($a, $b, $c);
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}
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function GoogleCH($url, $length = 0, $init = 0xE6359A60)
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{
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if ($length == 0) {
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$length = sizeof($url);
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}
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$a = $b = 0x9E3779B9;
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$c = $init;
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$k = 0;
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$len = $length;
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while($len >= 12) {
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$a += ($url[$k+0] +($url[$k+1]<<8) +($url[$k+2]<<16) +($url[$k+3]<<24));
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$b += ($url[$k+4] +($url[$k+5]<<8) +($url[$k+6]<<16) +($url[$k+7]<<24));
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$c += ($url[$k+8] +($url[$k+9]<<8) +($url[$k+10]<<16)+($url[$k+11]<<24));
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$mix = $this->mix($a,$b,$c);
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$a = $mix[0]; $b = $mix[1]; $c = $mix[2];
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$k += 12;
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$len -= 12;
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}
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$c += $length;
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switch($len) /* all the case statements fall through */
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{
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case 11: $c+=($url[$k+10]<<24);
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case 10: $c+=($url[$k+9]<<16);
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case 9 : $c+=($url[$k+8]<<8);
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/* the first byte of c is reserved for the length */
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case 8 : $b+=($url[$k+7]<<24);
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case 7 : $b+=($url[$k+6]<<16);
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case 6 : $b+=($url[$k+5]<<8);
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case 5 : $b+=($url[$k+4]);
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case 4 : $a+=($url[$k+3]<<24);
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case 3 : $a+=($url[$k+2]<<16);
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case 2 : $a+=($url[$k+1]<<8);
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case 1 : $a+=($url[$k+0]);
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/* case 0: nothing left to add */
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}
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$mix = $this->mix($a,$b,$c);
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return $mix[2];
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}
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//converts a string into an array of integers containing the numeric value of the char
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function strord($string)
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{
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for($i=0;$i<strlen($string);$i++) {
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$result[$i] = ord($string{$i});
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}
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return $result;
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}
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/*
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* Query returns "Rank_1:1:4" (for example) as a string
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*/
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function getrank($url)
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{
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$url = 'info:'.$url;
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$ch = $this->GoogleCH($this->strord($url));
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$url = "http://www.google.com/search?client=navclient-auto&ch=6$ch&features=Rank&q=" . urlencode($url);
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if (ini_get('allow_url_fopen')) {
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$data = file_get_contents($url, 128);
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} else {
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if (function_exists('serendipity_request_url')) {
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$data = serendipity_request_url($url);
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} else {
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require_once S9Y_PEAR_PATH . 'HTTP/Request.php';
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$req = new HTTP_Request($url);
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if (!PEAR::isError($req->sendRequest())) {
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$data = $req->getResponseBody();
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}
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}
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}
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$rankarray = explode (':', $data);
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return $rankarray[2];
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}
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}
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/* vim: set sts=4 ts=4 expandtab : */
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