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<?php
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// $Id: google_pr.module,v 1.5 2008/08/14 12:28:40 deekayen Exp $
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/**
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* @file
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* This module provides visitors to your web site a way to find the Google PageRank of sites chosen by them.
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*/
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/**
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* Implementation of hook_help().
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*/
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function google_pr_help($path, $args) {
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switch ($path) {
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case 'google_pr':
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return '<p>'. variable_get('google_pr_description', t('<strong>Google PageRank</strong> is a general representation of an internet page\'s popularity; it is primarily based on link popularity. Commonly the websites with a high PageRank value tend to have more traffic and higher positions in search engines (although many other factors are also taken into consideration).')) .'</p>';
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}
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}
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/**
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* Implementation of hook_menu().
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*/
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function google_pr_menu() {
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$items = array();
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$items['admin/settings/google_pr'] = array(
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'title' => 'Google PageRank',
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'description' => 'Change how Google PageRank behaves.',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('google_pr_admin_settings'),
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'access callback' => 'user_access',
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'access arguments' => array('administer site configuration')
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);
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$items['google_pr'] = array(
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'title' => 'Google PageRank',
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'page callback' => 'google_pr_page',
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'access callback' => 'user_access',
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'access arguments' => array('get pagerank'),
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'weight' => 0
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);
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return $items;
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}
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/**
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* Define the settings form.
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*/
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function google_pr_admin_settings() {
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$form = array();
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$form['google_pr_max'] = array(
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'#type' => 'select',
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'#title' => t('Maximum number of simultaneous URL addresses'),
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'#default_value' => variable_get('google_pr_max', '5'),
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'#options' => array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10'),
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'#description' => t('This is to prevent abuse of the system.'),
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);
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$form['google_pr_description'] = array(
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'#type' => 'textarea',
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'#title' => t('Description on top of page'),
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'#default_value' => variable_get('google_pr_description', t('<strong>Google PageRank</strong> is a general representation of an internet page\'s popularity; it is primarily based on link popularity. Commonly the websites with a high PageRank value tend to have more traffic and higher positions in search engines (although many other factors are also taken into consideration).')),
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'#cols' => 70,
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'#rows' => 7,
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'#description' => t('This text will be displayed at the top of the Google PageRank page. You can use HTML code.'),
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);
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$form['google_pr_watchdog'] = array(
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'#type' => 'checkbox',
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'#title' => t('Log all requests for Google PageRank.'),
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'#default_value' => variable_get('google_pr_watchdog', 0),
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);
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return system_settings_form($form);
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}
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/**
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* Implementation of hook_perm().
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*/
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function google_pr_perm() {
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return array(
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'get pagerank' => t('Use the query form to request PageRank values from Google.')
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);
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}
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// Display the form
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function google_pr_form() {
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$form = array();
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$max = variable_get('google_pr_max', 5);
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$form['urls'] = array(
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'#type' => 'textarea',
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'#title' => t("URLs ($max max)"),
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'#default_value' => $urls,
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'#cols' => 50,
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'#rows' => 5,
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'#maxlength' => 100,
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'#description' => t('URLs separated by newline. Example: www.example.com'),
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);
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$form['#redirect'] = FALSE;
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$form['submit'] = array(
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'#type' => 'submit',
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'#value' => t('Get Google PageRank')
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);
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return $form;
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}
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/**
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* Handle post-validation form submission.
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*/
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function google_pr_form_submit($form, &$form_state) {
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}
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function google_pr_page() {
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$urls = $_POST['urls'];
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$urls = explode("\n", $urls);
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$urls = array_map('trim', $urls);
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$urls = array_filter($urls, 'strlen');
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$urls = array_slice($urls, 0, variable_get('google_pr_max', 5));
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$header = array(t('URL'), t('Google Pagerank'));
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$rows = array();
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$path_module = drupal_get_path('module', 'google_pr');
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$output .= drupal_get_form('google_pr_form', $form_values);
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if ($_POST['op'] == t('Get Google PageRank')) {
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include_once($path_module .'/PageRankXor32.php');
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$pagerank_object = new PageRankXor32();
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foreach ($urls as $url) {
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$urlpr = google_pr_get($url);
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$rows[] = array($url, $urlpr);
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$urls_dog[] = $url .' : '. $urlpr;
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}
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$output .= '<p> </p><p>'. theme('table', $header, $rows) .'</p>';
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if (variable_get('google_pr_watchdog', '0') == 1) {
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foreach ($urls_dog as $url_dog) {
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$msg .= $url_dog .'<br />';
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}
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watchdog('google_pr', $msg, NULL, WATCHDOG_INFO);
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}
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}
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return $output;
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}
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function google_pr_get($url) {
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$url = trim($url);
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$path_module = drupal_get_path('module', 'google_pr');
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include_once($path_module .'/PageRankXor32.php');
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$pagerank_object = new PageRankXor32();
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$result = db_query("SELECT COUNT(pagerank) FROM {google_pr} where url = '%s'", $url);
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if (db_result($result) == 0) {
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$urlpr = $pagerank_object->getRank($url);
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if ($urlpr != '-1') {
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db_query("INSERT INTO {google_pr} (url, pagerank, timestamp) VALUES ('%s', %d, %d)", $url, $urlpr, time());
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}
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}
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else {
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$urlpr = db_result(db_query_range("SELECT pagerank FROM {google_pr} where url = '%s'", $url, 0, 1));
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}
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return $urlpr != '-1' ? '<img src="'. base_path() . $path_module .'/pr-'. $urlpr .'.gif" width="58" height="28" alt="'. $urlpr .'" />' : t('Not a valid URL');
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}
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/**
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* Implementation of hook_requirements().
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*
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* Show the pagerank of the current site in the status report.
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*/
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function google_pr_requirements($phase) {
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$requirements = array();
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$t = get_t();
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if ($phase == 'runtime') {
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$pr = google_pr_get(url('<front>', array('absolute' => TRUE)));
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$requirements['google_pr_rank'] = array(
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'title' => $t('Google Pagerank'),
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'value' => $pr,
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'severity' => REQUIREMENT_INFO
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);
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}
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return $requirements;
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}
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