<?php

/**
 * @file
 * Farm asset install.
 */

/**
 * Implements hook_enable().
 */
function farm_asset_install() {

  /**
   * Set the weight of this module to 1.
   *
   * We do this so that our hook_views_data_alter() fires after the taxonomy
   * module's hook, because we need to alter it.
   *
   * @see farm_asset_views_data_alter()
   */
  db_query("UPDATE {system} SET weight = 1 WHERE name = 'farm_asset'");
}

/**
 * Implements hook_schema().
 */
function farm_asset_schema() {
  $schema['farm_asset'] = array(
    'description' => 'Farm assets',
    'fields' => array(
      'id' => array(
        'description' => 'Asset ID',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'name' => array(
        'description' => 'Asset name',
        'type' => 'varchar',
        'length' => '255',
        'not null' => FALSE,
      ),
      'type' => array(
        'description' => 'Asset type',
        'type' => 'varchar',
        'length' => '255',
        'not null' => FALSE,
      ),
      'uid' => array(
        'description' => 'Asset author',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
      'created' => array(
        'description' => 'Timestamp when the asset was created',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'changed' => array(
        'description' => 'Timestamp when the asset was last modified',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'archived' => array(
        'description' => 'Timestamp when the asset was archived',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array('id'),
    'indexes' => array(
      'name' => array('name'),
      'type_index' => array('type'),
      'uid' => array('uid'),
      'created' => array('created'),
      'modified' => array('changed'),
      'archived' => array('archived'),
    ),
  );
  $schema['farm_asset_type'] = array(
    'description' => 'Stores information about all defined asset types.',
    'fields' => array(
      'id' => array(
        'description' => 'Primary Key: Unique asset type ID.',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'type' => array(
        'description' => 'The machine-readable name of this asset type.',
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
      ),
      'label' => array(
        'description' => 'The human-readable name of this asset type.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
      ),

      // The following fields are required to make types exportable via
      // Entity API and Ctools.
      'status' => array(
        'type' => 'int',
        'not null' => TRUE,
        // Set the default to ENTITY_CUSTOM without using the constant as it is
        // not safe to use it at this point.
        'default' => 0x01,
        'size' => 'tiny',
        'description' => 'The exportable status of the entity.',
      ),
      'module' => array(
        'description' => 'The name of the providing module if the entity has been defined in code.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => FALSE,
      ),
    ),
    'primary key' => array('id'),
    'unique keys' => array(
      'type' => array('type'),
    ),
  );
  return $schema;
}

/**
 * Add 'active' field to farm assets.
 */
function farm_asset_update_7000(&$sandbox) {

  // Add 'active' field to farm assets.
  $active = array(
    'description' => 'Boolean indicating whether the asset is active.',
    'type' => 'int',
    'size' => 'tiny',
    'not null' => TRUE,
    'default' => 1,
  );
  db_add_field('farm_asset', 'active', $active);
  db_add_index('farm_asset', 'active', array('active'));
}

/**
 * Increase module weight.
 */
function farm_asset_update_7001(&$sandbox) {

  // Set the weight of farm_asset to 1.
  db_query("UPDATE {system} SET weight = 1 WHERE name = 'farm_asset'");
}

/**
 * Change the name of the {farm_asset} index to fix SQLite installs.
 */
function farm_asset_update_7002(&$sandbox) {
  db_drop_index('farm_asset', 'type');
  db_add_index('farm_asset', 'type_index', array('type'));
}

/**
 * Change the asset active property to an archived timestamp.
 */
function farm_asset_update_7003(&$sandbox) {

  // Add the new archived field and index.
  $new_field = array(
    'description' => 'Timestamp when the asset was last archived',
    'type' => 'int',
  );
  $new_keys = array(
    'indexes' => array(
      'archived' => array('archived'),
    ),
  );
  db_add_field('farm_asset', 'archived', $new_field, $new_keys);

  // Populate the archived field of inactive assets with the value from the
  // asset's changed field.
  db_query('UPDATE {farm_asset} SET archived = changed WHERE active = 0');

  // Drop the active field.
  db_drop_field('farm_asset', 'active');
}

/**
 * Change default value of asset archived property to 0 instead of null.
 */
function farm_asset_update_7004(&$sandbox) {

  // Drop the index.
  db_drop_index('farm_asset', 'archived');

  // Set all NULL values to 0.
  db_query('UPDATE {farm_asset} SET archived = 0 WHERE archived IS NULL');

  // Change the field.
  $archived = array(
    'description' => 'Timestamp when the asset was archived',
    'type' => 'int',
    'not null' => TRUE,
    'default' => 0,
  );
  $archived_keys = array(
    'indexes' => array(
      'archived' => array('archived'),
    ),
  );
  db_change_field('farm_asset', 'archived', 'archived', $archived, $archived_keys);
}