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Drupal example source code file (ctools.install)

This example Drupal source code file (ctools.install) is included in the DevDaily.com "Drupal Source Code Warehouse" project. The intent of this project is to help you "Learn Drupal by Example".

PHP - Drupal tags/keywords

array, cache, css, description, function, name, not, php, return, the, this, to, true, type

The ctools.install Drupal example source code

<?php

/**
 * @file
 * Contains install and update functions for ctools.
 */

/**
 * Use requirements to ensure that the CTools CSS cache directory can be
 * created and that the PHP version requirement is met.
 */
function ctools_requirements($phase) {
  $requirements = array();
  if ($phase == 'runtime') {
    $requirements['ctools_css_cache'] = array(
      'title' => t('CTools CSS Cache'),
      'severity' => REQUIREMENT_OK,
      'value' => t('Exists'),
    );

    $path = 'public://ctools/css';
    if (!file_prepare_directory($path, FILE_CREATE_DIRECTORY)) {
      $requirements['ctools_css_cache']['description'] = t('The CTools CSS cache directory, %path could not be created due to a misconfigured files directory. Please ensure that the files directory is correctly configured and that the webserver has permission to create directories.', array('%path' => file_uri_target($path)));
      $requirements['ctools_css_cache']['severity'] = REQUIREMENT_ERROR;
      $requirements['ctools_css_cache']['value'] = t('Unable to create');
    }

    if (!function_exists('error_get_last')) {
  	  $requirements['ctools_php_52']['title'] = t('CTools PHP requirements');
      $requirements['ctools_php_52']['description'] = t('CTools requires certain features only available in PHP 5.2.0 or higher.');
      $requirements['ctools_php_52']['severity'] = REQUIREMENT_WARNING;
      $requirements['ctools_php_52']['value'] = t('PHP !version', array('!version' => phpversion()));
    }
  }

  return $requirements;
}

/**
 * Implements hook_schemea
 */
function ctools_schema() {
  return ctools_schema_2();
}

/**
 * Version 2 of the CTools schema.
 */
function ctools_schema_2() {
  $schema = ctools_schema_1();

  // update the 'name' field to be 128 bytes long:
  $schema['ctools_object_cache']['fields']['name']['length'] = 128;

  // DO NOT MODIFY THIS TABLE -- this definition is used to create the table.
  // Changes to this table must be made in schema_3 or higher.
  $schema['ctools_css_cache'] = array(
    'description' => 'A special cache used to store CSS that must be non-volatile.',
    'fields' => array(
      'cid' => array(
        'type' => 'varchar',
        'length' => '128',
        'description' => 'The CSS ID this cache object belongs to.',
        'not null' => TRUE,
      ),
      'filename' => array(
        'type' => 'varchar',
        'length' => '255',
        'description' => 'The filename this CSS is stored in.',
      ),
      'css' => array(
        'type' => 'text',
        'size' => 'big',
        'description' => 'CSS being stored.',
        'serialize' => TRUE,
      ),
      'filter' => array(
         'type' => 'int',
         'size' => 'tiny',
         'description' => 'Whether or not this CSS needs to be filtered.',
       ),
    ),
    'primary key' => array('cid'),
  );

  return $schema;
}

/**
 * CTools' initial schema; separated for the purposes of updates.
 *
 * DO NOT MAKE CHANGES HERE. This schema version is locked.
 */
function ctools_schema_1() {
  $schema['ctools_object_cache'] = array(
    'description' => t('A special cache used to store objects that are being edited; it serves to save state in an ordinarily stateless environment.'),
    'fields' => array(
      'sid' => array(
        'type' => 'varchar',
        'length' => '64',
        'not null' => TRUE,
        'description' => 'The session ID this cache object belongs to.',
      ),
      'name' => array(
        'type' => 'varchar',
        'length' => '32',
        'not null' => TRUE,
        'description' => 'The name of the object this cache is attached to.',
      ),
      'obj' => array(
        'type' => 'varchar',
        'length' => '32',
        'not null' => TRUE,
        'description' => 'The type of the object this cache is attached to; this essentially represents the owner so that several sub-systems can use this cache.',
      ),
      'updated' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The time this cache was created or updated.',
      ),
      'data' => array(
        'type' => 'text',
        'size' => 'big',
        'description' => 'Serialized data being stored.',
        'serialize' => TRUE,
      ),
    ),
    'primary key' => array('sid', 'obj', 'name'),
    'indexes' => array('updated' => array('updated')),
  );
  return $schema;
}

/**
 * Enlarge the ctools_object_cache.name column to prevent truncation and weird
 * errors.
 */
function ctools_update_6001() {
  // Perform updates like this to reduce code duplication.
  $schema = ctools_schema_2();

  db_change_field('ctools_object_cache', 'name', 'name', $schema['ctools_object_cache']['fields']['name']);
}

/**
 * Add the new css cache table.
 */
function ctools_update_6002() {
  // Schema 2 is locked and should not be changed.
  $schema = ctools_schema_2();

  db_create_table('ctools_css_cache', $schema['ctools_css_cache']);
}

/**
 * Take over for the panels_views module if it was on.
 */
function ctools_update_6003() {
  $result = db_query('SELECT status FROM {system} WHERE name = :name', array(':name' => 'panels_views'))->fetchField();
  if ($result) {
    db_delete('system')->condition('name', 'panels_views')->execute();
    drupal_install_modules(array('views_content'));
  }
}

/**
 * Add primary key to the ctools_object_cache table.
 */
function ctools_update_6004() {
  db_add_primary_key('ctools_object_cache', array('sid', 'obj', 'name'));
  db_drop_index('ctools_object_cache', 'sid_obj_name');
}

/**
 * Removed update.
 */
function ctools_update_6005() {
  return array();
}

/**
 * ctools_custom_content table was originally here, but is now moved to
 * its own module.
 */
function ctools_update_6007() {
  $ret = array();
  if (db_table_exists('ctools_custom_content')) {
    // Enable the module to make everything as seamless as possible.
    drupal_install_modules(array('ctools_custom_content'));
  }

  return $ret;
}


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