<?php

/**
 * @file
 * farmOS install file.
 */

/**
 * Define farmOS modules that will be available to enable during installation.
 *
 * @return array
 *   Returns an array with two sub-arrays:
 *     'default': an array of modules that will be checked by default.
 *     'optional': an array of modules that will be unchecked by default.
 */
function farm_modules() {
  return array(
    'default' => array(
      'farm_log_harvest' => st('Harvest logs'),
      'farm_log_input' => st('Input logs'),
      'farm_crop' => st('Crops'),
      'farm_livestock' => st('Livestock'),
      'farm_livestock_weight' => st('Livestock weight tracking'),
      'farm_equipment' => st('Equipment'),
      'farm_equipment_field' => st('Add "Equipment used" field to logs'),
      'farm_calendar' => st('Calendar of logs'),
      'farm_import' => st('CSV importers for assets and logs'),
      'farm_quick' => st('Quick forms UI'),
      'farm_soil_nrcs' => st('NRCS Soil Survey'),
      'farm_soil_test' => st('Soil test logs'),
      'farm_area_generate' => st('Area generator (for generating parallel beds within an area)'),
      'farm_area_import' => st('Import areas in bulk from a single KML file'),
      'farm_area_types' => t('Default area types: Property, Field, Building, etc'),
      'farm_crop_area_types' => t('Crop area types: Bed and Greenhouse'),
      'farm_livestock_area_types' => t('Livestock area types: Paddock'),
      'farm_water' => st('Water area type'),
      'farm_quantity_report' => st('Quantity report generator'),
      'farm_data_field' => st('Add an arbitrary "data" field to logs and assets'),
      'farm_access_roles' => st('Default roles: Manager, Worker, Viewer'),
      'farm_help' => st('farmOS Help Pages'),
      'farm_tour' => st('farmOS Tours'),
      'farm_api' => st('farmOS API'),
    ),
    'optional' => array(
      'farm_water_test' => st('Water test logs'),
      'farm_soil_compost' => st('Compost'),
      'farm_sensor' => st('Sensor'),
      'farm_sensor_listener' => st('Sensor: Listener'),
      'farm_ledger' => st('Sale and purchase logs (beta)'),
    ),
  );
}

/**
 * Implements hook_install().
 */
function farm_install() {

  // Only admins can create new accounts.
  variable_set('user_register', USER_REGISTER_ADMINISTRATORS_ONLY);

  // Enable farm theme and set as default.
  theme_enable(array('farm_theme'));
  variable_set('theme_default', 'farm_theme');

  // Disable the default Bartik theme
  theme_disable(array('bartik'));

  // Set the front page to the farm dashboard (provided by the farm_admin).
  variable_set('site_frontpage', 'farm');

  // Use the farm menu for primary links (provided by farm_admin).
  variable_set('menu_main_links_source', 'farm');
}

/**
 * Implements hook_install_tasks().
 */
function farm_install_tasks(&$install_state) {
  $tasks = array(
    'farm_install_configure_form' => array(
      'display_name' => st('Configure farmOS'),
      'type' => 'form',
    ),
    'farm_install_optional_modules' => array(
      'display_name' => st('Install optional modules'),
      'type' => 'batch',
    ),
  );
  return $tasks;
}

/**
 * Form callback for farmOS configuration install task.
 */
function farm_install_configure_form($form, &$form_state) {

  // Set the page title.
  drupal_set_title(st('Configure farmOS'));

  // Load the list of available modules.
  $modules = farm_modules();

  // Allow user to choose which high-level farm modules to install.
  $module_options = array_merge($modules['default'], $modules['optional']);
  // Default modules will be selected by default.
  $module_defaults = array_keys($modules['default']);
  $form['farm_modules'] = array(
    '#type' => 'checkboxes',
    '#title' => st('farmOS Modules'),
    '#description' => st('Select the farmOS modules that you would like installed by default.'),
    '#options' => $module_options,
    '#default_value' => $module_defaults,
  );

  // Allow the user to select their default system of measurement.
  $form['farm_quantity_unit_system'] = array(
    '#type' => 'radios',
    '#title' => t('System of measurement'),
    '#description' => t('Select the system of measurement you would like to use in farmOS.'),
    '#options' => array(
      'metric' => t('Metric'),
      'us' => t('US/Imperial'),
    ),
    '#default_value' => variable_get('farm_quantity_unit_system', 'metric'),
  );

  // Allow the user to enter a Google Maps API key.
  $form['farm_map_google_api_key'] = array(
    '#type' => 'textfield',
    '#title' => t('Google Maps API Key'),
    '#description' => t('Google Maps layers require that you obtain an API key. Refer to the <a href="@doc">Google Maps API Key</a> documentation on farmOS.org for instructions.', array('@doc' => 'https://farmos.org/hosting/googlemaps')) . ' ' . t('This can also be done after installation.'),
    '#default_value' => variable_get('farm_map_google_api_key', ''),
  );

  // Allow the user to enter a Mapbox API key.
  $form['farm_map_mapbox_api_key'] = array(
    '#type' => 'textfield',
    '#title' => t('Mapbox API Key'),
    '#description' => t('Enter your Mapbox API key.') . ' ' . t('This can also be done after installation.'),
    '#default_value' => variable_get('farm_map_mapbox_api_key', ''),
  );

  // Form actions.
  $form['actions'] = array('#type' => 'actions');
  $form['actions']['submit'] = array(
    '#type' => 'submit',
    '#value' => st('Continue'),
  );

  // Return the form.
  return $form;
}

/**
 * Submit function for farmOS configuration install task form.
 */
function farm_install_configure_form_submit($form, &$form_state) {

  // Save the list of selected modules to a variable.
  if (!empty($form_state['values']['farm_modules'])) {
    variable_set('farm_install_optional_modules', $form_state['values']['farm_modules']);
  }

  // Save the selected system of measure.
  if (!empty($form_state['values']['farm_quantity_unit_system'])) {
    variable_set('farm_quantity_unit_system', $form_state['values']['farm_quantity_unit_system']);
  }

  // If a Google Maps API key was provided, save it and enable the module.
  if (!empty($form_state['values']['farm_map_google_api_key'])) {
    variable_set('farm_map_google_api_key', $form_state['values']['farm_map_google_api_key']);
    if (!module_exists('farm_map_google')) {
      module_enable(array('farm_map_google'));
    }
  }

  // If a Mapbox API key was provided, save it and enable the module.
  if (!empty($form_state['values']['farm_map_mapbox_api_key'])) {
    variable_set('farm_map_mapbox_api_key', $form_state['values']['farm_map_mapbox_api_key']);
    if (!module_exists('farm_map_mapbox')) {
      module_enable(array('farm_map_mapbox'));
    }
  }
}

/**
 * Callback function for installing optional farmOS modules via Batch API.
 */
function farm_install_optional_modules() {

  // Load the list of modules to install.
  $modules = variable_get('farm_install_optional_modules', array());

  // Load list of module names.
  $files = system_rebuild_module_data();

  // Start an array of batch operations.
  $operations = array();

  // Add operation to enable selected modules.
  foreach ($modules as $module => $enable) {
    if (!empty($enable)) {
      $operations[] = array('_farm_install_enable_module', array($module, $files[$module]->info['name']));
    }
  }

  // Assemble the Batch API.
  $batch = array(
    'title' => t('Installing optional modules'),
    'operations' => $operations,
  );

  // Return the Batch API.
  return $batch;
}

/**
 * BatchAPI callback: enable a module.
 *
 * @see farm_install_optional_modules()
 */
function _farm_install_enable_module($module, $module_name, &$context) {
  module_enable(array($module));
  $context['message'] = st('Installed %module module.', array('%module' => $module_name));
}

/**
 * Implements hook_update_dependencies().
 */
function farm_update_dependencies() {

  // farm_livestock_7000() and farm_equipment_update_7000 both depend on
  // farm_update_7000() because they use the new field_bases provided by
  // farm_fields.
  $farm_7000 = array(
    'farm' => 7000,
  );
  $dependencies['farm_equipment'][7000] = $farm_7000;
  $dependencies['farm_livestock'][7000] = $farm_7000;

  // farm_livestock_7001() depends on farm_update_7019() because it uses the new
  // field_farm_parent field from the farm_asset_children module.
  $dependencies['farm_livestock'][7001] = array('farm' => 7019);

  return $dependencies;
}

/**
 * Enable the Farm Fields module.
 */
function farm_update_7000(&$sandbox) {

  // Install the farm_fields module and revert the field_base component on it,
  // so that they are available to update hooks in other modules.
  //
  // Between farmOS 7.x-1.0-beta2 and 7.x-1.0-beta3, we upgraded from
  // Features 1.x to 2.x. This replaced the 'field' component with
  // 'field_base' and 'field_instance'. At the same time, a new module was
  // introduced, to serve as a place to put common field_bases: farm_fields.
  if (!module_exists('farm_fields')) {

    // Enable the farm_fields module.
    module_enable(array('farm_fields'));

    // Reset the "default_hook" static cache for field_base Features components.
    module_load_include('inc', 'features', 'features.export');
    features_get_default_hooks('field_base', TRUE);

    // Load the farm_fields field_base Features include file, otherwise
    // feature_get_default() will not see it, and the revert will fail.
    module_load_include('inc', 'farm_fields', 'farm_fields.features.field_base');

    // Revert the field_base component of farm_fields.
    features_revert(array('farm_fields' => array('field_base')));
  }
}

/**
 * Update to Openlayers 3
 */
function farm_update_7001(&$sandbox) {

  // Enable new module dependencies.
  $modules = array(
    // 'openlayers_geofield',  // Removed.
    'views_geojson',
  );
  _farm_update_enable_modules($modules);
}

/**
 * Enable Entity Reference View Widget.
 */
function farm_update_7002(&$sandbox) {

  // Enable new module dependencies.
  $modules = array(
    'entityreference_view_widget',
  );
  _farm_update_enable_modules($modules);
}

/**
 * Use the farm menu for primary links.
 */
function farm_update_7003(&$sandbox) {
  variable_set('menu_main_links_source', 'farm');
}

/**
 * Enable the RESTful Web Services module.
 */
function farm_update_7004(&$sandbox) {
  _farm_update_enable_modules(array('restws'));
}

/**
 * Load Openlayers via CDN.
 */
function farm_update_7005(&$sandbox) {
  // Removed.
}

/**
 * Autorotate images.
 */
function farm_update_7006(&$sandbox) {

  // Enable the EXIF Orientation module.
  _farm_update_enable_modules(array('exif_orientation'));
}

/**
 * Install Farm Access and Role Delegation, uninstall Farm Manager.
 */
function farm_update_7007(&$sandbox) {

  // Enable the Farm Access and Role Delegation modules.
  _farm_update_enable_modules(array('farm_access', 'role_delegation'));

  // Disable and uninstall the Farm Manager module.
  $module = 'farm_manager';
  if (module_exists($module)) {
    module_disable(array($module));
    drupal_uninstall_modules(array($module));
  }
}

/**
 * Install Farm Tour.
 */
function farm_update_7008(&$sandbox) {

  // Enable the Farm Access and Role Delegation modules.
  _farm_update_enable_modules(array('farm_tour'));
}

/**
 * Enable "Request new password" link on 403 pages (via LoginToboggan).
 */
function farm_update_7009(&$sandbox) {
  variable_set('logintoboggan_site_403_user_login_block', TRUE);
}

/**
 * Recalculate all Geofield metadata, using BCMath (patched GeoPHP module), so
 * centroids are correct.
 */
function farm_update_7010(&$sandbox) {

  // Process this in passes of 50 at a time.
  $sandbox['#finished'] = 0;
  $limit = 50;

  // Keep track of progress.
  if (!isset($sandbox['progress'])) {

    // Start out at zero.
    $sandbox['progress'] = 0;

    // Figure out which entity types/bundles have geofields.
    $sandbox['geofields'] = array();
    $query = "SELECT fci.entity_type, fci.bundle, fc.field_name FROM {field_config_instance} fci LEFT JOIN {field_config} fc ON fc.id = fci.field_id WHERE fc.type = 'geofield'";
    $result = db_query($query);
    foreach ($result as $row) {
      $sandbox['geofields'][$row->entity_type][$row->bundle] = $row->field_name;
    }

    // Build an array of all the entities that need to be processed, and take a
    // count of the total.
    $sandbox['entities'] = array();
    $sandbox['total'] = 0;
    foreach ($sandbox['geofields'] as $entity_type => $bundles) {
      $sandbox['entities'][$entity_type] = array();
      foreach ($bundles as $bundle => $field_name) {
        $query = new EntityFieldQuery;
        $query->entityCondition('entity_type', $entity_type)
          ->entityCondition('bundle', $bundle);
        $results = $query->execute();
        if (isset($results[$entity_type])) {
          $sandbox['entities'][$entity_type] = array_merge($sandbox['entities'][$entity_type], $results[$entity_type]);
          $sandbox['total'] += count($results[$entity_type]);
        }
      }
    }
  }

  // Process the next set of entities.
  $i = 0;
  while ($i < $limit && $sandbox['progress'] < $sandbox['total']) {

    // Get the entity array keys, which correspond to the entity types.
    $keys = array_keys($sandbox['entities']);

    // If the first array in the list of entities is empty, remove it.
    if (empty($sandbox['entities'][$keys[0]])) {
      array_shift($sandbox['entities']);
      array_shift($keys);
    }

    // The first key is the entity type we're currently working with.
    $entity_type = $keys[0];

    // Shift the next entity off the front of the list.
    $info = array_shift($sandbox['entities'][$entity_type]);

    // Load the entity.
    $id = reset($info);
    $entities = entity_load($entity_type, array($id));
    $entity = reset($entities);

    // Look up which field this bundle is using.
    $wrapper = entity_metadata_wrapper($entity_type, $id);
    $bundle = $wrapper->getBundle();
    $field_name = $sandbox['geofields'][$entity_type][$bundle];

    // If the geofield 'geom' value is not empty...
    if (!empty($entity->{$field_name}[LANGUAGE_NONE][0]['geom'])) {

      // Save the entity, so that geofield_field_presave() runs and regenerates
      // the other geometry metadata values.
      entity_save($entity_type, $entity);
    }

    // Increment $i and $sandbox['progress'].
    $i++;
    $sandbox['progress']++;
  }

  // Tell Drupal whether or not we're finished.
  if ($sandbox['total'] > 0) {
    $sandbox['#finished'] = $sandbox['progress'] / $sandbox['total'];
  }
  else {
    $sandbox['#finished'] = 1;
  }
}

/**
 * Load Openlayers 3.10.1 from CDNJS.
 */
function farm_update_7011(&$sandbox) {
  // Removed.
}

/**
 * Load Openlayers 3.11.2 from CDNJS.
 */
function farm_update_7012(&$sandbox) {
  // Removed.
}

/**
 * Uninstall Views Data Export.
 */
function farm_update_7013(&$sandbox) {
  $module = 'views_data_export';
  if (module_exists($module)) {
    module_disable(array($module));
    drupal_uninstall_modules(array($module));
  }
}

/**
 * Uninstall Filefield Paths.
 */
function farm_update_7014(&$sandbox) {
  $module = 'filefield_paths';
  if (module_exists($module)) {
    module_disable(array($module));
    drupal_uninstall_modules(array($module));
  }
}

/**
 * Uninstall Panels and Page Manager.
 */
function farm_update_7015(&$sandbox) {
  $modules = array(
    'page_manager',
    'panels',
  );
  module_disable($modules);
  drupal_uninstall_modules($modules);
}

/**
 * Uninstall Logintoboggan.
 */
function farm_update_7016(&$sandbox) {
  variable_del('site_403');
  variable_del('logintoboggan_login_with_email');
  variable_del('logintoboggan_site_403_user_login_block');
}

/**
 * Install Farm Quantity and Farm Area Generator modules.
 */
function farm_update_7017(&$sandbox) {
  _farm_update_enable_modules(array('farm_area_generate', 'farm_quantity'));
}

/**
 * Uninstall Log Plan module.
 */
function farm_update_7018(&$sandbox) {
  $modules = array(
    'log_plan',
  );
  module_disable($modules);
  drupal_uninstall_modules($modules);
}

/**
 * Install Farm Asset Children module.
 */
function farm_update_7019(&$sandbox) {

  // Enable the Farm Asset Children module.
  _farm_update_enable_modules(array('farm_asset_children'));

  // Reset the "default_hook" static cache for field_base Features components.
  module_load_include('inc', 'features', 'features.export');
  features_get_default_hooks('field_base', TRUE);

  // Load the farm_asset_children field_base Features include file, otherwise
  // feature_get_default() will not see it, and the revert will fail.
  module_load_include('inc', 'farm_asset_children', 'farm_asset_children.features.field_base');

  // Revert the field_base component of farm_asset_children.
  features_revert(array('farm_asset_children' => array('field_base')));
}

/**
 * Install Views Data Export.
 */
function farm_update_7020(&$sandbox) {
  _farm_update_enable_modules(array('views_data_export'));
}

/**
 * Install Multiupload Filefield and Imagefield Widget modules.
 */
function farm_update_7021(&$sandbox) {
  _farm_update_enable_modules(array('multiupload_filefield_widget', 'multiupload_imagefield_widget'));
}

/**
 * Install Field Group module.
 */
function farm_update_7022(&$sandbox) {
  _farm_update_enable_modules(array('field_group'));
}

/**
 * Change the Bootswatch theme to Simplex 3.3.7.
 */
function farm_update_7023(&$sandbox) {
  $theme_settings = variable_get('theme_farm_theme_settings', array());
  $theme_settings['bootstrap_cdn_provider'] = 'custom';
  $theme_settings['bootstrap_cdn_custom_css'] = '//cdn.jsdelivr.net/bootswatch/3.3.7/simplex/bootstrap.css';
  $theme_settings['bootstrap_cdn_custom_css_min'] = '//cdn.jsdelivr.net/bootswatch/3.3.7/simplex/bootstrap.min.css';
  $theme_settings['bootstrap_cdn_custom_js'] = '//cdn.jsdelivr.net/bootstrap/3.3.7/js/bootstrap.js';
  $theme_settings['bootstrap_cdn_custom_js_min'] = '//cdn.jsdelivr.net/bootstrap/3.3.7/js/bootstrap.min.js';
  variable_set('theme_farm_theme_settings', $theme_settings);
}

/**
 * Populate all log owner fields with the log's author.
 */
function farm_update_7024(&$sandbox) {

  // Revert the farm_fields feature to ensure that the new field is available.
  features_revert(array('farm_fields' => array('field_base')));

  // Copy user id from {log} table.
  $select = "SELECT 'log' AS entity_type, type AS bundle, 0 AS deleted, id AS entity_id, id AS revision_id, 'und' AS language, 0 AS delta, uid AS field_farm_log_owner_target_id FROM {log}";
  db_query('INSERT INTO {field_data_field_farm_log_owner} (' . $select . ')');
  db_query('INSERT INTO {field_revision_field_farm_log_owner} (' . $select . ')');
}

/**
 * Install the new Farm Dashboard, Help, Menu, People, and UI modules.
 */
function farm_update_7025(&$sandbox) {

  // Enable new modules.
  $modules = array(
    'farm_dashboard',
    'farm_help',
    'farm_menu',
    'farm_people',
    'farm_ui',
  );
  _farm_update_enable_modules($modules);

  // Delete the farm_admin module.
  db_delete('system')
    ->condition('name', 'farm_admin')
    ->condition('type', 'module')
    ->execute();
}

/**
 * Install the new Farm Import module.
 */
function farm_update_7026(&$sandbox) {
  _farm_update_enable_modules(array('farm_import'));
}

/**
 * Enable new Farm Season module and remove Farm Taxonomy.
 */
function farm_update_7027(&$sandbox) {

  // Enable Farm Season.
  _farm_update_enable_modules(array('farm_season'));

  // Delete the farm_taxonomy module.
  db_delete('system')
    ->condition('name', 'farm_taxonomy')
    ->condition('type', 'module')
    ->execute();
}

/**
 * Update Openlayers JS library to 4.3.3.
 */
function farm_update_7028(&$sandbox) {
  // Removed.
}

/**
 * Enable Field Group: Easy Responsive Tabs to Accordion.
 */
function farm_update_7029(&$sandbox) {
  _farm_update_enable_modules(array('field_group_easy_responsive_tabs'));
}

/**
 * Enable the Drupal Help module for inline help text.
 */
function farm_update_7030(&$sandbox) {
  _farm_update_enable_modules(array('help'));
}

/**
 * Rename farm_log_movement to farm_movement in the {system} table.
 */
function farm_update_7031(&$sandbox) {

  // Drupal will autodetect farm_movement as a new module, and will think
  // farm_log_movement is missing - so we need to do some tricky
  // bait-and-switch to rename the module and ensure that it stays enabled.

  // Load the {system} record for farm_log_movement, and make our modifications.
  $record = db_query("SELECT * FROM {system} WHERE name = 'farm_log_movement' AND type = 'module'")->fetch();
  $record->name = str_replace('farm_log_movement', 'farm_movement', $record->name);
  $record->filename = str_replace('farm_log/farm_log_movement', 'farm_movement', $record->filename);
  $record->status = 1;

  // Delete any farm_log_movement and farm_movement records.
  db_query("DELETE FROM {system} WHERE name = 'farm_log_movement' AND type = 'module'");
  db_query("DELETE FROM {system} WHERE name = 'farm_movement' AND type = 'module'");

  // Re-save the original record.
  drupal_write_record('system', $record);
}

/**
 * Enable new Farm Inventory module.
 */
function farm_update_7032(&$sandbox) {
  _farm_update_enable_modules(array('farm_inventory'));
}

/**
 * Enable new Farm Group module.
 */
function farm_update_7033(&$sandbox) {
  _farm_update_enable_modules(array('farm_group'));
}

/**
 * Enable new Farm Calendar module.
 */
function farm_update_7034(&$sandbox) {
  _farm_update_enable_modules(array('farm_calendar'));
}

/**
 * Set the Bootstrap navbar position to "Fixed Top".
 */
function farm_update_7035(&$sandbox) {
  $theme_settings = variable_get('theme_farm_theme_settings', array());
  $theme_settings['bootstrap_navbar_position'] = 'fixed-top';
  variable_set('theme_farm_theme_settings', $theme_settings);
}

/**
 * Enable new Farm Constraint module.
 */
function farm_update_7036(&$sandbox) {
  _farm_update_enable_modules(array('farm_constraint'));
}

/**
 * Enable new Farm Asset Views module.
 */
function farm_update_7037(&$sandbox) {
  _farm_update_enable_modules(array('farm_asset_views'));
}

/**
 * Update Openlayers JS library to 4.6.4.
 */
function farm_update_7038(&$sandbox) {
  // Removed.
}

/**
 * Enable new Farm Flags module.
 */
function farm_update_7039(&$sandbox) {
  _farm_update_enable_modules(array('farm_flags'));
}

/**
 * Enable new Farm Quantity Log module.
 */
function farm_update_7040(&$sandbox) {
  _farm_update_enable_modules(array('farm_quantity_log'));
}

/**
 * Enable new Farm Map KML module.
 */
function farm_update_7041(&$sandbox) {
  _farm_update_enable_modules(array('farm_map_kml'));
}

/**
 * Enable new Farm API module.
 */
function farm_update_7042(&$sandbox) {
  _farm_update_enable_modules(array('farm_api'));
}

/**
 * Enable Farm Quick module.
 */
function farm_update_7043(&$sandbox) {
  _farm_update_enable_modules(array('farm_quick'));
}

/**
 * Enable Farm Term module.
 */
function farm_update_7044(&$sandbox) {
  _farm_update_enable_modules(array('farm_term'));
}

/**
 * Use local OpenLayers JS library instead of CDN.
 */
function farm_update_7045(&$sandbox) {

  // Set the variant config in the Openlayers module.
  // Removed.

  // Uninstall Libraries CDN.
  db_query("DELETE FROM {system} WHERE name = 'libraries_cdn' AND type = 'module'");
}

/**
 * Uninstall Role Delegation
 */
function farm_update_7046(&$sandbox) {

  // Uninstall Role Delegation.
  db_query("DELETE FROM {system} WHERE name = 'role_delegation' AND type = 'module'");
}

/**
 * Add an arbitrary data field to logs and assets.
 */
function farm_update_7047(&$sandbox) {
  _farm_update_enable_modules(array('farm_data_field'));
}

/**
 * Add "Equipment used" field to logs (if Equipment module is enabled).
 */
function farm_update_7048(&$sandbox) {
  if (module_exists('farm_equipment')) {
    _farm_update_enable_modules(array('farm_equipment_field'));
  }
}

/**
 * Enable Farm Fields Autocomplete module.
 */
function farm_update_7049(&$sandbox) {
  _farm_update_enable_modules(array('farm_fields_autocomplete'));
}

/**
 * Install the new Farm Map Geofield module and update Geofield instance settings.
 */
function farm_update_7050(&$sandbox) {

  // Enable farm_map_geofield.
  _farm_update_enable_modules(array('farm_map_geofield'));

  // Update all instances of field_farm_geofield.
  $instances_info = field_info_instances();
  foreach ($instances_info as $entity_type => $bundles) {
    foreach ($bundles as $bundle => $instances) {
      foreach ($instances as $field_name => $instance) {

        // If the field name is not field_farm_geofield, skip.
        if ($field_name != 'field_farm_geofield') {
          continue;
        }

        // Update widget settings.
        if (!empty($instance['widget'])) {
          $instance['widget']['module'] = 'farm_map_geofield';
          $remove_settings = array('allow_edit', 'data_storage', 'feature_types', 'openlayers_map', 'showInputField');
          foreach ($remove_settings as $name) {
            unset($instance['widget']['settings'][$name]);
          }
          $instance['widget']['type'] = 'farm_map_geofield';
        }

        // Update display settings.
        if (!empty($instance['display']['default'])) {
          $instance['display']['default']['module'] = 'farm_map_geofield';
          $instance['display']['default']['settings'] = array();
          $instance['display']['default']['type'] = 'farm_map_geofield';
        }

        // Update the instance.
        field_update_instance($instance);
      }
    }
  }
}

/**
 * Uninstall Openlayers modules and dependencies.
 */
function farm_update_7051(&$sandbox) {
  global $conf;
  foreach (array_keys($conf) as $key) {
    if (strpos($key, 'openlayers_') === 0) {
      variable_del($key);
    }
  }
  $modules = array(
    'openlayers',
    'openlayers_block',
    'openlayers_block_switcher',
    'openlayers_boxes',
    'openlayers_cesium',
    'openlayers_content_types',
    'openlayers_contextual_links',
    'openlayers_examples',
    'openlayers_field',
    'openlayers_geofield',
    'openlayers_geolocate_button',
    'openlayers_library',
    'openlayers_quicktabs',
    'openlayers_services',
    'openlayers_ui',
    'openlayers_views',
    'registry_autoload',
    'registry_autoload_test',
    'service_container',
    'service_container_annotation_discovery',
    'service_container_annotation_discovery_subtest',
    'service_container_annotation_discovery_test',
    'service_container_block',
    'service_container_symfony',
    'service_container_symfony_subtest',
    'service_container_symfony_test',
    'service_container_test',
    'service_container_test_ctools',
  );
  foreach ($modules as $module) {
    db_query("DELETE FROM {system} WHERE name = '$module' AND type = 'module'");
  }
  $tables = array(
    'openlayers_components',
    'openlayers_controls',
    'openlayers_interactions',
    'openlayers_layers',
    'openlayers_maps',
    'openlayers_projections',
    'openlayers_sources',
    'openlayers_styles',
  );
  foreach ($tables as $table) {
    db_query("DROP TABLE {$table}");
  }
}

/**
 * Install the Farm Metrics module.
 */
function farm_update_7052(&$sandbox) {
  _farm_update_enable_modules(array('farm_metrics'));
}

/**
 * Update helper function: enable modules.
 */
function _farm_update_enable_modules($modules = array()) {
  foreach ($modules as $module) {
    if (!module_exists($module)) {
      module_enable(array($module));
    }
  }
}