<?php

/**
 * @file
 * Install, update and uninstall functions for the twitter_block module.
 */

/**
 * Implements hook_schema().
 */
function twitter_block_schema() {
  $schema['twitter_block'] = array(
    'description' => 'The table for storing twitter blocks.',
    'fields' => array(
      'bid' => array(
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => "The block's {block}.bid.",
      ),
      'info' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Block description.',
      ),
      'widget_id' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Widget ID.',
      ),
      'data' => array(
        'type' => 'blob',
        'size' => 'big',
        'not null' => TRUE,
        'serialize' => TRUE,
        'description' => 'Serialized data containing the timeline properties.',
      ),
    ),
    'unique keys' => array(
      'info' => array('info'),
      'widget_id' => array('widget_id'),
    ),
    'primary key' => array('bid'),
  );

  return $schema;
}

/**
 * Implements hook_uninstall().
 */
function twitter_block_uninstall() {
  // Remove blocks
  db_delete('block')
    ->condition('module', 'twitter_block')
    ->execute();
  db_delete('block_role')
    ->condition('module', 'twitter_block')
    ->execute();

  // Clear the site cache
  cache_clear_all();
}

/**
 * Remove any old Twitter Block blocks and install the new Twitter Block schema.
 */
function twitter_block_update_7200() {
  // Remove old Twitter Block schema
  drupal_uninstall_schema('twitter_block');

  // Remove any old Twitter Block blocks
  db_delete('block')
    ->condition('module', 'twitter_block')
    ->execute();
  db_delete('block_role')
    ->condition('module', 'twitter_block')
    ->execute();

  // Clear the site cache
  cache_clear_all();

  // Install the new Twitter Block schema
  drupal_install_schema('twitter_block');

  return t('Removed any old Twitter Block blocks and installed the new Twitter Block schema.');
}