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<?php
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/**
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* @file
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* Install, update and uninstall functions for the CAPTCHA module.
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*/
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/**
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* Implementation of hook_schema().
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*/
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function captcha_schema() {
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// Table for positions and types of the challenges.
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$schema['captcha_points'] = array(
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'description' => 'This table describes which challenges should be added to which forms.',
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'fields' => array(
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'form_id' => array(
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'description' => 'The form_id of the form to add a CAPTCHA to.',
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'type' => 'varchar',
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'length' => 128,
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'not null' => TRUE,
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'default' => '',
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),
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'module' => array(
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'description' => 'The module that provides the challenge.',
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'type' => 'varchar',
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'length' => 64,
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),
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'captcha_type' => array(
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'description' => 'The challenge type to use.',
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'type' => 'varchar',
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'length' => 64,
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),
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),
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'primary key' => array('form_id'),
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);
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// Table for the CAPTCHA sessions.
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$schema['captcha_sessions'] = array(
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'description' => 'Stores the data about CAPTCHA sessions (solution, IP address, timestamp, ...).',
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'fields' => array(
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'csid' => array(
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'description' => 'CAPTCHA session ID.',
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'type' => 'serial',
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'not null' => TRUE,
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),
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'token' => array(
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'description' => 'One time CAPTCHA token.',
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'type' => 'varchar',
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'length' => 64,
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'not null' => FALSE,
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),
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'uid' => array(
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'description' => "User's {users}.uid.",
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'type' => 'int',
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'not null' => TRUE,
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'default' => 0,
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),
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'sid' => array(
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'description' => "Session ID of the user.",
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'type' => 'varchar',
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'length' => 64,
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'not null' => TRUE,
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'default' => '',
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),
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'ip_address' => array(
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'description' => 'IP address of the visitor.',
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'type' => 'varchar',
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'length' => 128,
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'not null' => FALSE,
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),
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'timestamp' => array(
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'description' => 'A Unix timestamp indicating when the challenge was generated.',
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'type' => 'int',
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'not null' => TRUE,
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'default' => 0,
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),
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'form_id' => array(
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'description' => 'The form_id of the form where the CAPTCHA is added to.',
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'type' => 'varchar',
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'length' => 128,
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'not null' => TRUE,
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),
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'solution' => array(
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'description' => 'Solution of the challenge.',
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'type' => 'varchar',
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'length' => 128,
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'not null' => TRUE,
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'default' => '',
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),
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'status' => array(
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'description' => 'Status of the CAPTCHA session (unsolved, solved, ...)',
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'type' => 'int',
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'not null' => TRUE,
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'default' => 0,
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),
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'attempts' => array(
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'description' => 'The number of attempts.',
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'type' => 'int',
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'not null' => TRUE,
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'default' => 0,
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),
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),
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'primary key' => array('csid'),
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'indexes' => array(
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'csid_ip' => array('csid', 'ip_address'),
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),
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);
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return $schema;
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}
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/**
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* Implements of hook_requirements().
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*/
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function captcha_requirements($phase) {
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$requirements = array();
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$t = get_t();
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if ($phase == 'runtime' && variable_get('captcha_enable_stats', FALSE)) {
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// Show the wrong response counter in the status report.
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$requirements['captcha_wrong_response_counter'] = array(
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'title' => $t('CAPTCHA'),
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'value' => format_plural(
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variable_get('captcha_wrong_response_counter', 0),
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'Already 1 blocked form submission',
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'Already @count blocked form submissions'
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),
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'severity' => REQUIREMENT_INFO,
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);
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}
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return $requirements;
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}
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/**
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* Implements of hook_install().
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*/
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function captcha_install() {
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$t = get_t();
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// Insert some default CAPTCHA points.
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$form_ids = array(
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'contact_site_form', 'contact_personal_form',
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'user_register_form', 'user_pass', 'user_login', 'user_login_block',
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'forum_node_form',
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);
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// Add form_ids of all currently known node types too.
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foreach (node_type_get_names() as $type => $name) {
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$form_ids[] = 'comment_node_' . $type . '_form';
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}
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foreach ($form_ids as $form_id) {
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db_insert('captcha_points')
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->fields(array(
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'form_id' => $form_id,
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'module' => NULL,
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'captcha_type' => NULL,
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))
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->execute();
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}
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// Be friendly to your users: what to do after install?
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drupal_set_message($t('You can now <a href="!captcha_admin">configure the CAPTCHA module</a> for your site.',
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array('!captcha_admin' => url('admin/config/people/captcha'))), 'status');
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// Explain to users that page caching may be disabled.
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if (variable_get('cache', 0) != 0) {
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drupal_set_message($t('Note that the CAPTCHA module disables <a href="!performance_admin">page caching</a> of pages that include a CAPTCHA challenge.',
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array('!performance_admin' => url('admin/config/development/performance'))), 'warning');
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}
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}
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/**
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* Implements of hook_uninstall().
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*/
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function captcha_uninstall() {
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drupal_uninstall_schema('captcha');
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db_query("DELETE FROM {variable} WHERE name LIKE 'captcha_%'");
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cache_clear_all('variables', 'cache');
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}
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/**
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* Implements of hook_update_N().
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*/
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function captcha_update_6200() {
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$items = array();
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// Table for the CAPTCHA sessions.
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$schema['captcha_sessions'] = array(
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'description' => 'Stores the data about CAPTCHA sessions (solution, IP address, timestamp, ...).',
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'fields' => array(
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'csid' => array(
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'description' => 'CAPTCHA session ID.',
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'type' => 'serial',
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'not null' => TRUE,
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),
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'uid' => array(
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'description' => "User's {users}.uid.",
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'type' => 'int',
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'not null' => TRUE,
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'default' => 0,
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),
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'sid' => array(
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'description' => "Session ID of the user.",
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'type' => 'varchar',
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'length' => 64,
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'not null' => TRUE,
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'default' => '',
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),
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'ip_address' => array(
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'description' => 'IP address of the visitor.',
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'type' => 'varchar',
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'length' => 128,
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'not null' => FALSE,
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),
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'timestamp' => array(
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'description' => 'A Unix timestamp indicating when the challenge was generated.',
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'type' => 'int',
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'not null' => TRUE,
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'default' => 0,
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),
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'form_id' => array(
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'description' => 'The form_id of the form where the CAPTCHA is added to.',
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'type' => 'varchar',
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'length' => 128,
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'not null' => TRUE,
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),
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'solution' => array(
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'description' => 'Solution of the challenge.',
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'type' => 'varchar',
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'length' => 128,
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'not null' => TRUE,
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'default' => '',
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),
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'status' => array(
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'description' => 'Status of the CAPTCHA session (unsolved, solved, ...)',
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'type' => 'int',
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'not null' => TRUE,
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'default' => 0,
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),
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'attempts' => array(
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'description' => 'The number of attempts.',
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'type' => 'int',
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'not null' => TRUE,
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'default' => 0,
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),
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),
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'primary key' => array('csid'),
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'indexes' => array(
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'csid_ip' => array('csid', 'ip_address'),
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),
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);
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db_create_table($items, 'captcha_sessions', $schema['captcha_sessions']);
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return $items;
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}
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/**
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* Implements of hook_update_N().
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*
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* Change the captcha points with the old text CAPTCHA, which was
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* removed from the 6.x-2.x branch, to the simple math CAPTCHA.
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*/
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function captcha_update_6201() {
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$items = array();
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$items[] = update_sql("UPDATE {captcha_points} SET module = 'captcha', type = 'Math' WHERE module = 'text_captcha' AND type = 'Text';");
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return $items;
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}
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/**
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* Implements of hook_update_N().
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*
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* Add a CAPTCHA token column to captcha_sessions table.
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*/
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function captcha_update_6202() {
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$ret = array();
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db_add_column($ret, 'captcha_sessions', 'token', 'varchar(64)');
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return $ret;
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}
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/**
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* Implements of hook_update_N().
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*
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* Rename the type field to captcha_type in captcha_points.
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*/
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function captcha_update_6203() {
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$ret = array();
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db_change_field($ret, 'captcha_points', 'type', 'captcha_type', array('type' => 'varchar', 'length' => 64));
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return $ret;
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}
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/**
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* Migrate form configuration for changed form ids in Drupal 7.
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*/
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function captcha_update_7000() {
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// 'user_register' became 'user_register_form'.
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db_update('captcha_points')
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->fields(array('form_id' => 'user_register_form'))
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->condition('form_id', 'user_register')
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->execute();
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// 'contact_mail_page' became 'contact_site_form'.
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db_update('captcha_points')
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->fields(array('form_id' => 'contact_site_form'))
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->condition('form_id', 'contact_mail_page')
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->execute();
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// 'contact_mail_user' became 'contact_personal_form'.
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db_update('captcha_points')
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->fields(array('form_id' => 'contact_personal_form'))
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->condition('form_id', 'contact_mail_user')
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->execute();
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// The D6-style comment_form form_id is split per node type
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// in D7: comment_node_{type}_form, e.g. comment_node_page_form.
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// Get the current settings for 'comment_form'.
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$captcha_point = db_query(
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"SELECT * FROM {captcha_points} WHERE form_id = :comment_form_id",
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array(':comment_form_id' => 'comment_form')
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)->fetchObject();
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if ($captcha_point !== FALSE) {
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// Create entries for D7-style node form IDs.
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$module = $captcha_point->module;
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$captcha_type = $captcha_point->captcha_type;
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foreach (node_type_get_names() as $type => $name) {
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$form_id = 'comment_node_' . $type . '_form';
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db_insert('captcha_points')
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->fields(array(
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'form_id' => $form_id,
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'module' => $module,
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'captcha_type' => $captcha_type,
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))
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->execute();
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}
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// Delete outdated entry.
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db_delete('captcha_points')
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->condition('form_id', 'comment_form')
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->execute();
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}
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}
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