<?php
/**
 * @file
 * Contains install and update functions for the Text CAPTCHA module.
 */

 /**
  * Implements hook_install().
  */
function textcaptcha_install() {
  drupal_install_schema('textcaptcha');
  $t = get_t();
  $text = $t('To set up textCAPTCHA get an API key !here. Then go to the admin
  configuration page !admin to save your key and retrieve some challenge
  questions.',
    array(
      '!here' => l($t('here'), 'http://textcaptcha.com/'),
      '!admin' => l($t('here'), 'admin/config/people/captcha/textcaptcha'),
    )
  );
  drupal_set_message($text, 'warning');
}

 /**
  * Implements hook_uninstall().
  */
function textcaptcha_uninstall() {
  drupal_uninstall_schema('textcaptcha');
  $variables = array(
    'textcaptcha_api_key',
    'textcaptcha_challenge_description',
    'textcaptcha_cron',
    'textcaptcha_question_limit',
  );
  foreach ($variables as $variable) {
    variable_del($variable);
  }
}

/**
 * Implements hook_schema().
 */
function textcaptcha_schema() {
  $schema['textcaptcha_answers'] = array(
    'description' => 'Caches textcaptcha answers to prevent exceeding the API rate limit.',
    'fields' => array(
      'aid' => array(
        'description' => 'The primary identifier for an answer.',
        'type' => 'serial',
        'not null' => TRUE,
      ),
      'qid' => array(
        'description' => 'The question to which the answer belongs.',
        'type' => 'int',
        'not null' => TRUE,
      ),
      'answer' => array(
        'description' => 'A MD5 hash of the answer.',
        'type' => 'text',
        'not null' => TRUE,
      ),
      'created' => array(
        'description' => 'The date the answer was added.',
        'type' => 'int',
        'not null' => TRUE,
      ),
    ),
    'primary key' => array('aid'),
  );

  $schema['textcaptcha_questions'] = array(
    'description' => 'Caches textcaptcha questions to prevent exceeding the API rate limit.',
    'fields' => array(
      'qid' => array(
        'description' => 'The primary identifier for a question.',
        'type' => 'serial',
        'not null' => TRUE,
      ),
      'question' => array(
        'description' => 'The text of the question.',
        'type' => 'text',
        'not null' => TRUE,
      ),
      'created' => array(
        'description' => 'The date the question was added.',
        'type' => 'int',
        'not null' => TRUE,
      ),
    ),
    'primary key' => array('qid'),
  );

  return $schema;
}

/**
 * Implements hook_update_N().
 *
 * Install new schema for textcaptcha database tables.
 */
function textcaptcha_update_6001() {
  if (!db_table_exists('textcaptcha_answers')) {
    drupal_install_schema('textcaptcha');
  }
}