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<?php
// $Id$
/**
* @file
* Node Import Truncate module.
*
* This module adds a final step at the Node Import form so users
* can choose whether to erase all nodes of a given content type
* before importing new data into it.
*/
/**
* Implementation of hook_menu();
*/
function node_import_truncate_menu() {
$items['admin/content/node_import/truncate'] = array(
'title' => 'Node Import Truncate',
'description' => 'Mass deletion page.',
'page callback' => 'node_import_truncate_page',
'access arguments' => array('administer nodes'),
'type' => MENU_CALLBACK,
);
return $items;
}
/**
* Menu callback.
*/
function node_import_truncate_page($taskid = NULL) {
$output = t('Choose whether to delete older content.');
$output .= drupal_get_form('node_import_truncate_form', $taskid);
return $output;
}
/**
* Mass deletion form.
*/
function node_import_truncate_form(&$form_state, $taskid = NULL) {
$form['taskid'] = array(
'#type' => 'value',
'#value' => $taskid,
);
$form['mass_delete'] = array(
'#type' => 'checkbox',
'#title' => t('Pre-import mass deletion'),
'#description' => t('Delete old content before importing new data.'),
'#default_value' => variable_get('node_import_truncate', '0'),
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Submit'),
);
return $form;
}
/**
* Implementation of hook_validate();
*/
function node_import_truncate_form_validate($form, $form_state) {
if (!isset($form_state['values']['mass_delete'])) {
form_set_error('mass_delete', t('Please choose an option'));
}
}
/**
* Handle post-validation form-submission.
*/
function node_import_truncate_form_submit($form, &$form_state) {
$mass_delete = $form_state['values']['mass_delete'];
variable_set('node_import_truncate', $mass_delete);
if (isset($form_state['values']['taskid'])) {
$taskid = $form_state['values']['taskid'];
$redirect = 'admin/content/node_import/' . $taskid;
}
else {
$redirect = NULL;
}
if ($mass_delete == 1) {
$task = node_import_load($taskid);
$type = ereg_replace('.*:', '', $task['type']);
$batch = array(
'title' => t('Deleting old data.'),
'operations' => array(
array('node_truncate', array($type)),
),
'finished' => 'node_truncate_callback',
);
batch_set($batch);
batch_process($redirect);
}
else {
drupal_goto($redirect);
}
}
/**
* Implementation of hook_node_import_task();
*
* As the user may be adding a spreadsheet containing
* old and new content, we need to check whether to remove
* all previous content to prevent duplicate data in the
* database.
*/
function node_import_truncate_node_import_task($task, $op) {
if ($op == 'insert') {
drupal_goto('admin/content/node_import/truncate/' . $task['taskid']);
}
}
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