optimizely.install

<?php

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

/**
 * Implements hook_schema().
 *
 * Called at both install and uninstall time, creates/deletes a custom table in
 * the database for the Optimizely module.
 */
function optimizely_schema() {

  $schema['optimizely'] = [
    'description' => 'This table holds the Optimizely project / experiment
		  entries from the adminstration form.',
    'fields' => [
      'oid' => [
        'description' => 'The unique identifier of each Optimizely
				  project/experiment entry.',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ],

      'project_title' => [
        'description' => 'The title of each project.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
      ],

      'include' => [
        'description' => 'Switch to include / exclude Optimizely snippet on
				  specific page paths.',
        'type' => 'int',
        'size' => 'tiny',
        'not null' => TRUE,
        'default' => 1,
      ],

      'enabled' => [
        'description' => 'Switch to enabled / disabled Optimizely snippet entry.',
        'type' => 'int',
        'size' => 'tiny',
        'not null' => TRUE,
        'default' => 0,
      ],

      'path' => [
        'description' => 'Serialized array of paths where the Optimizely code
				  snippet appears',
        'type' => 'text',
        'size' => 'normal',
        'not null' => FALSE,
      ],

      'project_code' => [
        'description' => 'Optimizely project code.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => FALSE,
        'default' => '',
      ],

    ],

    'primary key' => ['oid'],

  ];

  return $schema;

}

/**
 * Implements hook_install().
 *
 * Included in the process of adding a optimizely database table is the creation
 * of a default project entry in the table. The default entry is used to add an
 * initial javascript file (snippit) on a sitewide basis. The Optimizely
 * account ID will need to be entered in the account setup page to complete the
 * default entry. The Optimizely site uses the account ID to generate the basic
 * javascipt file to be included on the site. Once additional projects /
 * experiments are created on the Optimizely site additional project entries can
 * be added to load the additional javascript files on specific site paths.
 * Selective loading of the Optimizely javascipt file helps in page load times
 * and the amount of custom Optimizely javascript in each Javascript include
 * file.
 */
function optimizely_install() {

  drupal_set_message(t('Optimizely database table has been created.'), 'status');

  // Add default entry - check to see if entry already exsists.
  $default_entry_exists = (bool) \Drupal::database()->query("
	  SELECT
		  project_title
		FROM
		  {optimizely}
		WHERE
		  oid = 1
		")
    ->fetchField();

  if ($default_entry_exists == TRUE) {
    drupal_set_message(t('A default entry found in the optimizely database table.
       Something funky is going on but it\'s not the end of the world.'),
      'warning');
  }
  else {

    // Create default entry.
    $default_entry_created = (bool) \Drupal::database()->insert('optimizely')
      ->fields(
        [
          'project_title' => 'Default',
          'include' => 1,
          'enabled' => 0,
          'path' => serialize(['*']),
          'project_code' => 0,
        ]
      )
      ->execute();

    // Inform the administrator that a default snippet entry has been made.
    // Acount ID and access permisisons need to be configured.
    if ($default_entry_created == TRUE) {
      drupal_set_message(t('A default project / experiment entry has been created.
         Next, enter your Optimizely account ID on the module\'s ACCOUNT INFO page.
         There is also an Optimizely permission that can be set for specific roles
         to access the adminstration functionality.
         You can access those pages via the Optimizely module below.'),
        'status');
    }
    else {
      drupal_set_message(t('An error was encountered while adding the default project entry
         for the Optimizely module.'), 'error');
    }
  }

  // Set the default value for the language code to be English.
  $config = \Drupal::configFactory()->getEditable('optimizely.settings');
  $config->set('langcode', 'en');
  $config->save();
}

/**
 * Implements hook_uninstall().
 *
 * Clean up / remove all data created by the module.
 */
function optimizely_uninstall() {

  // Remove all values from optimizely.settings.
  $config = \Drupal::configFactory()->getEditable('optimizely.settings');
  $config->delete();

  drupal_set_message(t('Optimizely variables deleted.'), 'status');

  // hook_uninstall removes schema automatically.
  drupal_set_message(t('Optimizely database table dropped.'), 'status');
}