<?php

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

function coder_install() {
  drupal_install_schema('coder');
}

function coder_uninstall() {
  variable_del('coder_cache');
  variable_del('coder_reviews');
  variable_del('coder_severity');
  variable_del('coder_active_modules');
  variable_del('coder_core');
  variable_del('coder_includes');
  variable_del('coder_includes_exclusions');
  variable_del('coder_modules');
  variable_del('coder_themes');

  drupal_uninstall_schema('coder');
}

function _coder_cache_schema() {
  // Use our own cache table because we can create lots of entries, that slow down and clutter the default cache.
  return array(
    'description' => t("Coder cache table for improving display of result sets that haven't changed"),
    'fields' => array(
      'cid' => array(
        'description' => t('Primary Key: Unique cache ID.'),
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => ''),
      'data' => array(
        'description' => t('A collection of data to cache.'),
        'type' => 'blob',
        'not null' => FALSE,
        'size' => 'big'),
      'expire' => array(
        'description' => t('A Unix timestamp indicating when the cache entry should expire, or 0 for never.'),
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'created' => array(
        'description' => t('A Unix timestamp indicating when the cache entry was created.'),
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'headers' => array(
        'description' => t('Any custom HTTP headers to be added to cached data.'),
        'type' => 'text',
        'not null' => FALSE),
      'serialized' => array(
        'description' => t('A flag to indicate whether content is serialized (1) or not (0).'),
        'type' => 'int',
        'size' => 'small',
        'not null' => TRUE,
        'default' => 0)
      ),
    'indexes' => array('expire' => array('expire')),
    'primary key' => array('cid'),
    );
}

function coder_schema() {
  $schema['cache_coder'] = _coder_cache_schema();
  return $schema;
}

function coder_update_1() {
  $ret = array();
  // This update adds a theming function, so we need to clear the entire cache.
  $ret[] = update_sql("DELETE FROM {cache}");
  return $ret;
}

function coder_update_2() {
  $ret = array();
  // Create the new coder cache table.
  db_create_table($ret, 'cache_coder', _coder_cache_schema());
  // Clear coder entries from the default cache.
  cache_clear_all('coder:', 'cache', TRUE);
  return $ret;
}

function coder_update_3() {
  $ret = array();
  $ret[] = update_sql("DELETE FROM {variable} WHERE name LIKE 'coder_modules-%' OR name LIKE 'coder_themes-%'");
  cache_clear_all('variables', 'cache');
  return $ret;
}