modules/content_refresh/content_refresh.module

<?php
// $Id: content_refresh.module,v 1.10 2009/08/21 19:47:13 yaph Exp $

/**
 * @file
 * Author: Ramiro Gómez - http://www.ramiro.org
 * A Drupal module that provides cache clearing functionality
 * for various content related actions.
 */

/**
 * Implementation of hook_menu().
 */
function content_refresh_menu() {
  $items = array();
  $items['admin/content/content-refresh'] = array(
    'title' => 'Content Refresh',
    'description' => 'Set the cache clearing options for content updates.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('content_refresh_admin_settings'),
    'access arguments' => array('administer site configuration'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'content_refresh.admin.inc'
    );
  return $items;
}

/**
 * Implementation of hook_nodeapi().
 */
function content_refresh_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {

  $cache_lifetime = variable_get('cache_lifetime', 0);
  $cache_enabled = variable_get('cache', CACHE_DISABLED);

  if ($cache_enabled && $cache_lifetime > 0) {

    $clear_front = FALSE;
    $clear_page = FALSE;
    $clear_comment_page = FALSE;

    switch ($op) {
      case 'insert':
        if ($node->status && $node->promote) {
          $clear_front = TRUE;
        }
      case 'delete':
        $clear_page = TRUE;
        if ($node->status && $node->promote) {
          $clear_front = TRUE;
          $clear_comment_page = TRUE;
        }
        break;
      case 'update':
        if ($node->status) {
          $clear_page = TRUE;
          if ($node->promote) {
            $clear_front = TRUE;
          }
        }
        if (!$node->status && $node->promote) {
          $clear_front = TRUE;
        }
        break;
    }
    
    if ($clear_page) {
      $url = url('node/'. $node->nid, array('absolute' => TRUE));
      cache_clear_all($url, 'cache_page');
    }

    if ($clear_comment_page && module_exists('comment')) {
      $url = url('comment/reply/'. $node->nid, array('absolute' => TRUE));
      cache_clear_all($url, 'cache_page', TRUE);
    }

    if ($clear_front && variable_get('content_refresh_clear_front_page_cache', 1)) {
      content_refresh_clear_front_page_cache();
    }
  }
}

/**
 * Clear the cache entry of the front page
 *
 * @param Void
 * @return Void
 */
function content_refresh_clear_front_page_cache() {
  $front = variable_get('site_frontpage', 'node');
  $url = url($front, array('absolute' => TRUE));
  cache_clear_all($url, 'cache_page');
  // clear pager pages
  cache_clear_all($url . '?page', 'cache_page', TRUE);
  // clear cache entry for the front page entry without the site_frontpage value appended
  $url = preg_replace("%$front$%", '', $url);
  cache_clear_all($url, 'cache_page', FALSE);
}

/**
 * Implementation of hook_comment().
 */
function content_refresh_comment($a1, $op) {
  $nid = false;
  $uid = false;
  switch ($op) {
    case 'insert':
    case 'update':
      $nid = $a1['nid'];
      $uid = (int) $a1['uid'];
      break;
    case 'publish':
    case 'unpublish':
    case 'delete':
      $nid = $a1->nid;
      $uid = (int) $a1->uid;
      break;
  }

  if ($nid !== false && 0 === $uid) {
    // retrieve the absolute url for the node
    $options = array('absolute' => TRUE);
    $url = url('node/'. $nid, $options);
    // delete cache entries for that url
    cache_clear_all($url, 'cache_page');
  }
}
1	<?php
2	// $Id: content_refresh.module,v 1.10 2009/08/21 19:47:13 yaph Exp $
3
4	/**
5	* @file
6	* Author: Ramiro Gómez - http://www.ramiro.org
7	* A Drupal module that provides cache clearing functionality
8	* for various content related actions.
9	*/
10
11	/**
12	* Implementation of hook_menu().
13	*/
14	function content_refresh_menu() {
15	$items = array();
16	$items['admin/content/content-refresh'] = array(
17	'title' => 'Content Refresh',
18	'description' => 'Set the cache clearing options for content updates.',
19	'page callback' => 'drupal_get_form',
20	'page arguments' => array('content_refresh_admin_settings'),
21	'access arguments' => array('administer site configuration'),
22	'type' => MENU_NORMAL_ITEM,
23	'file' => 'content_refresh.admin.inc'
24	);
25	return $items;
26	}
27
28	/**
29	* Implementation of hook_nodeapi().
30	*/
31	function content_refresh_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
32
33	$cache_lifetime = variable_get('cache_lifetime', 0);
34	$cache_enabled = variable_get('cache', CACHE_DISABLED);
35
36	if ($cache_enabled && $cache_lifetime > 0) {
37
38	$clear_front = FALSE;
39	$clear_page = FALSE;
40	$clear_comment_page = FALSE;
41
42	switch ($op) {
43	case 'insert':
44	if ($node->status && $node->promote) {
45	$clear_front = TRUE;
46	}
47	case 'delete':
48	$clear_page = TRUE;
49	if ($node->status && $node->promote) {
50	$clear_front = TRUE;
51	$clear_comment_page = TRUE;
52	}
53	break;
54	case 'update':
55	if ($node->status) {
56	$clear_page = TRUE;
57	if ($node->promote) {
58	$clear_front = TRUE;
59	}
60	}
61	if (!$node->status && $node->promote) {
62	$clear_front = TRUE;
63	}
64	break;
65	}
66
67	if ($clear_page) {
68	$url = url('node/'. $node->nid, array('absolute' => TRUE));
69	cache_clear_all($url, 'cache_page');
70	}
71
72	if ($clear_comment_page && module_exists('comment')) {
73	$url = url('comment/reply/'. $node->nid, array('absolute' => TRUE));
74	cache_clear_all($url, 'cache_page', TRUE);
75	}
76
77	if ($clear_front && variable_get('content_refresh_clear_front_page_cache', 1)) {
78	content_refresh_clear_front_page_cache();
79	}
80	}
81	}
82
83	/**
84	* Clear the cache entry of the front page
85	*
86	* @param Void
87	* @return Void
88	*/
89	function content_refresh_clear_front_page_cache() {
90	$front = variable_get('site_frontpage', 'node');
91	$url = url($front, array('absolute' => TRUE));
92	cache_clear_all($url, 'cache_page');
93	// clear pager pages
94	cache_clear_all($url . '?page', 'cache_page', TRUE);
95	// clear cache entry for the front page entry without the site_frontpage value appended
96	$url = preg_replace("%$front$%", '', $url);
97	cache_clear_all($url, 'cache_page', FALSE);
98	}
99
100	/**
101	* Implementation of hook_comment().
102	*/
103	function content_refresh_comment($a1, $op) {
104	$nid = false;
105	$uid = false;
106	switch ($op) {
107	case 'insert':
108	case 'update':
109	$nid = $a1['nid'];
110	$uid = (int) $a1['uid'];
111	break;
112	case 'publish':
113	case 'unpublish':
114	case 'delete':
115	$nid = $a1->nid;
116	$uid = (int) $a1->uid;
117	break;
118	}
119
120	if ($nid !== false && 0 === $uid) {
121	// retrieve the absolute url for the node
122	$options = array('absolute' => TRUE);
123	$url = url('node/'. $nid, $options);
124	// delete cache entries for that url
125	cache_clear_all($url, 'cache_page');
126	}
127	}