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<?php
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// $Id: autosave.module,v 1.7 2009/10/31 20:59:08 ptalindstrom Exp $
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/**
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* @file
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* Does background saves of node being edited.
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*/
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define('AUTOSAVE_PATH', drupal_get_path('module', 'autosave'));
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/**
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* Implementation of hook_help().
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*/
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function autosave_help($path, $arg) {
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$output = '';
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switch ($path) {
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case 'admin/help#autosave':
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$output = '<p>'. t('The autosave module automatically saves a form after a period of time.') .'</p>';
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break;
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}
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return $output;
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}
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/**
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* Implementation of hook_menu().
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*/
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function autosave_menu() {
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$items['autosave/handler'] = array(
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'title' => 'Autosave save',
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'page callback' => 'autosave_save',
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'access callback' => TRUE,
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'type' => MENU_CALLBACK,
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);
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$items['admin/settings/autosave'] = array(
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'title' => 'Autosave',
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'description' => 'Configure autosave settings.',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('autosave_admin_settings'),
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'access arguments' => array('administer nodes'),
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);
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return $items;
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}
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/**
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* Menu callback; return the autosave module settings form.
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*/
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function autosave_admin_settings() {
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if (!file_exists(AUTOSAVE_PATH .'/jquery.field.js')) {
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drupal_set_message(t('Unable to find the jQuery Field Plugin in !path. Please <a href="http://plugins.jquery.com/files/jquery.field.js_4.txt">download jquery.field.js</a>
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and place it into !path.', array('!path' => $path)), 'error');
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}
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$form['autosave_period'] = array(
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'#type' => 'textfield',
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'#title' => t('Autosave after this amount seconds has passed'),
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'#default_value' => variable_get('autosave_period', 10),
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);
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return system_settings_form($form);
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}
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/**
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* Implementation of hook_form_alter() for node_type_form
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*/
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function autosave_form_node_type_form_alter(&$form, $form_state) {
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$form['workflow']['autosave'] = array(
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'#type' => 'checkbox',
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'#title' => t('Enable Autosave to add/edit forms for this node type'),
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'#default_value' => variable_get('autosave_'. $form['#node_type']->type, 0),
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'#description' => t('Check this box to enable Autosave for this node type.')
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);
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}
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/**
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* Implementation of hook_form_alter().
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*/
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function autosave_form_alter(&$form, &$form_state, $form_id) {
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global $user;
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$path = $_GET['q'];
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if (stristr($form_id, '_node_form') && arg(0) != 'admin') {
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// check if this content_type has the autosave function enabled and make sure it's a node edit or add form
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if ((variable_get('autosave_'. $form['type']['#value'], 0))) {
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drupal_add_js(AUTOSAVE_PATH .'/autosave.js');
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drupal_add_js(AUTOSAVE_PATH .'/jquery.field.js');
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drupal_add_css(AUTOSAVE_PATH .'/autosave.css');
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// if WYSIWYG module is enabled; lets let JS know this
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if (module_exists('wysiwyg')) $settings['autosave']['wysiwyg'] = 1;
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else $settings['autosave']['wysiwyg'] = 0;
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$settings['autosave']['url'] = url('autosave/handler');
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$settings['autosave']['period'] = variable_get('autosave_period', 10);
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$settings['autosave']['q'] = $path;
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// If an autosaved version of the form exists, make it available via javascript.
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if ($autosaved_form = autosave_get_autosaved_form($form_id, $path, $user->uid)) {
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//$autosaved_form_id = $form['type']['#value'] ? $form['type']['#value'] .'_node_form' : 'node_form';
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$settings['autosave'] = array_merge($settings['autosave'], array(
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'serialized' => unserialize($autosaved_form['serialized']),
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'saved_date' => format_date($autosaved_form['timestamp'], 'medium'),
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));
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}
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drupal_add_js($settings, 'setting');
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}
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}
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}
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/**
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* Menu callback; autosaves the node.
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*/
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function autosave_save() {
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global $user;
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$path = $_POST['q'];
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$form_id = $_POST['form_id'];
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// Not all variables need to be serialized.
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// - for Drupal 6 version need to remove op and form_build_id
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unset($_POST['q'], $_POST['op'], $_POST['form_build_id']);
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$serialized = serialize($_POST);
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// check if node has just been saved - if it has then it's because AS ajax fired off as user was submitting
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// if it had just been submitted - no need to AS now
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// - easy to figure out if we are submitting an edit to existing node
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// - little harder if we have just added a node
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$path_args = explode("/", $path);
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// update case
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if (is_numeric($path_args[1])) {
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$submitted = node_load($path_args[1]);
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}
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else {
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// add case
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$submitted->changed = db_result(db_query("SELECT created FROM {node} WHERE uid = %d and type = '%s' ORDER BY created DESC LIMIT 1", $user->uid, str_replace("-", "_", $path_args[2])));
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}
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if (!$submitted || (time() - $submitted->changed) > 10) {
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// Currently, each user can have only one autosave form at a particular path.
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db_query("DELETE FROM {autosaved_forms} WHERE form_id = '%s' AND path = '%s' AND uid = %d", $form_id, $path, $user->uid);
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db_query("INSERT INTO {autosaved_forms} (form_id, path, uid, timestamp, serialized) VALUES ('%s', '%s', %d, %d, '%s')", $form_id, $path, $user->uid, time(), $serialized);
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}
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exit();
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}
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/**
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* Get the autosaved form at a particular path for a user.
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*
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* @param string $form_id
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* The form_id of the form.
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* @param string $path
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* The the internal Drupal path where the form is located
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* @param string $uid
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* Drupal UID of the user
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* @return
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* An array containing the serialized values of the autosaved form and the timestamp of when the form was autosaved.
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*/
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function autosave_get_autosaved_form($form_id, $path, $uid) {
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$result = db_query("SELECT form_id, serialized, timestamp FROM {autosaved_forms} WHERE form_id = '%s' AND path = '%s' AND uid = %d", $form_id, $path, $uid);
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while ($data = db_fetch_object($result)) {
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$form['serialized'] = $data->serialized;
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$form['timestamp'] = $data->timestamp;
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}
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return $form;
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}
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/**
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* Implementation of hook_nodeapi().
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*
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* Delete autosave table entry on successful submit (add or update) of node
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*
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*/
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function autosave_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
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if ($op == 'presave') {
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// we remove ALL edits for that page (not just the users) to avoid:
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// - user1 asaves but doesnt submit
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// - user2 edits same node and submits
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// - user1 comes back to edit -> user1 SHOULD lose edits since user2 has precedence
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db_query("DELETE FROM {autosaved_forms} WHERE form_id = '%s' AND path = '%s'", $node->form_id, $_GET['q']);
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}
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}
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