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<?php
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// $Id: refresh.module,v 1.8 2007/10/11 21:07:15 karna Exp $
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/**
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* @refresh
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* Provides a configurable meta refresh when viewing individual nodes.
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*/
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/**
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* Implementation of hook_perm().
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* Creates two new permissions: one to create refreshes and one the change
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* the global settings of the module.
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*/
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function refresh_perm() {
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return array('create refreshes', 'administer refreshes');
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}
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/**
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* Implementation of hook_form_alter().
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* Adds a refresh group and numeric edit field to the node editing form.
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*/
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function refresh_form_alter(&$form, $form_state, $form_id) {
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if (isset($form['type']) && ($form['type']['#value'] .'_node_form' == $form_id)) {
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$refresh = $form['#node']->refresh;
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$form['refresh'] = array(
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'#type' => 'fieldset',
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'#title' => t('Refresh settings'),
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'#collapsible' => TRUE,
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'#collapsed' => empty($refresh),
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'#access' => user_access('create refreshes'),
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'#weight' => 30,
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);
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$form['refresh']['refresh'] = array(
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'#type' => 'textfield',
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'#default_value' => $refresh,
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'#maxlength' => 3,
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'#collapsible' => TRUE,
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'#collapsed' => TRUE,
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'#description' => t('Optionally provide a number of seconds after which the node page refreshes.'),
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);
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}
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}
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/**
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* Implementation of hook_nodeapi().
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* Display the refresh tag when displaying a node (by itself, not on the homepage)
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* and manipulates the refresh data of the node at the appropiate moments.
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*/
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function refresh_nodeapi(&$node, $op, $teaser, $page) {
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switch ($op) {
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case 'view':
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// Only add a refresh tag when viewing the node by itself
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if (($page) && ($node->refresh > 0)) {
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drupal_set_html_head('<meta http-equiv="refresh" content="' . check_plain($node->refresh) . '" />');
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}
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break;
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case 'load':
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$result = db_query("SELECT seconds FROM {node_refresh} WHERE nid = %d AND vid = %d", $node->nid, $node->vid);
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if ($result) {
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$node->refresh = db_result($result);
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}
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break;
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}
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if (user_access('create refreshes') || user_access('administer refreshes')) {
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switch ($op) {
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case 'validate':
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$refresh = trim($node->refresh);
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if ((strlen($refresh) > 0) && ($refresh <= 0)) {
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form_set_error('refresh', t('The refresh number is invalid. Please enter a number > 0 or blank.'));
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}
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break;
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case 'submit':
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$result = db_query("SELECT seconds FROM {node_refresh} WHERE nid = %d AND vid = %d", $node->nid, $node->vid);
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if (!db_num_rows($result) && ($node->nid > 0)) {
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$result = db_query("INSERT INTO {node_refresh} (nid, vid, seconds) VALUES (%d, %d, %d)", $node->nid, $node->vid, (int) $node->refresh);
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}
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break;
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case 'insert':
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$result = db_query("INSERT INTO {node_refresh} (nid, vid, seconds) VALUES (%d, %d, %d)", $node->nid, $node->vid, (int) $node->refresh);
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break;
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case 'update':
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if ((int) $node->refresh > 0) {
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$result = db_query("UPDATE {node_refresh} SET seconds = %d WHERE nid = %d AND vid = %d", (int) $node->refresh, $node->nid, $node->vid);
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}
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else {
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$result = db_query("DELETE FROM {node_refresh} WHERE nid = %d AND vid = %d", $node->nid, $node->vid);
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}
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break;
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case 'delete':
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$result = db_query("DELETE FROM {node_refresh} WHERE nid = %d AND vid = %d", $node->nid, $node->vid);
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break;
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}
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}
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}
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