buy_file.install

<?php
function buy_file_schema() {
  $schema['user_file_download'] = array(
    'description' => 'Lists files {files} and users {users} that can download',
    'fields' => array(
      'fid' => array(
        'description' => 'File id {files}.fid of file to download',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
      'uid' => array(
        'description' => 'User id who downloaded file. {users}.uid',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
      'downloadable' => array(
        'description' => 'True false value to allow you to download',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'indexes' => array(
      'fid' => array('fid'),
      'uid' => array('uid'),
    ),
  );
  
  return $schema;
}

function buy_file_install() {
  drupal_install_schema('buy_file');
  if (!module_exists('private_download')) {
    drupal_set_message(t('It is recommended you use the  Private Download 
    module in order to protect your files.'));
  }
  drupal_set_message(t('You must configure buy file <a href=@url>here</a>', array('@url' => base_path() . 'admin/settings/buy-file')));
}

function buy_file_uninstall() {
  drupal_uninstall_schema('buy_file');
  variable_del('buy_file_file_directory');
  variable_del('file_cost');
  variable_del('buy_file_repurchase');
  variable_del('buy_file_has_permission');
  variable_del('buy_file_thank_you');
  variable_del('buy_file_no_purchased_download');
  variable_del('buy_file_number');
}