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<?php

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

/**
 * Implements hook_schema().
 */
function dblog_schema() {
  $schema['watchdog'] = [
    'description' => 'Table that contains logs of all system events.',
    'fields' => [
      'wid' => [
        'type' => 'serial',
        'not null' => TRUE,
        'description' => 'Primary Key: Unique watchdog event ID.',
      ],
      'uid' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The {users}.uid of the user who triggered the event.',
      ],
      'type' => [
        'type' => 'varchar_ascii',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Type of log message, for example "user" or "page not found."',
      ],
      'message' => [
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
        'description' => 'Text of log message to be passed into the t() function.',
      ],
      'variables' => [
        'type' => 'blob',
        'not null' => TRUE,
        'size' => 'big',
        'description' => 'Serialized array of variables that match the message string and that is passed into the t() function.',
      ],
      'severity' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny',
        'description' => 'The severity level of the event; ranges from 0 (Emergency) to 7 (Debug)',
      ],
      'link' => [
        'type' => 'text',
        'not null' => FALSE,
        'description' => 'Link to view the result of the event.',
      ],
      'location'  => [
        'type' => 'text',
        'not null' => TRUE,
        'description' => 'URL of the origin of the event.',
      ],
      'referer' => [
        'type' => 'text',
        'not null' => FALSE,
        'description' => 'URL of referring page.',
      ],
      'hostname' => [
        'type' => 'varchar_ascii',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Hostname of the user who triggered the event.',
      ],
      'timestamp' => [
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Unix timestamp of when event occurred.',
      ],
    ],
    'primary key' => ['wid'],
    'indexes' => [
      'type' => ['type'],
      'uid' => ['uid'],
      'severity' => ['severity'],
    ],
  ];

  return $schema;
}

/**
 * Use standard plugin for wid and uid fields. Use dblog_types for type filter.
 */
function dblog_update_8400() {
  $config_factory = \Drupal::configFactory();

  foreach ($config_factory->listAll('views.view.') as $view_config_name) {
    $view = $config_factory->getEditable($view_config_name);
    if ($view->get('base_table') != 'watchdog') {
      continue;
    }

    $save = FALSE;
    foreach ($view->get('display') as $display_name => $display) {
      // Iterate through all the fields of watchdog views based tables.
      if (isset($display['display_options']['fields'])) {
        foreach ($display['display_options']['fields'] as $field_name => $field) {
          // We are only interested in wid and uid fields from the watchdog
          // table that still use the numeric id.
          if (isset($field['table']) &&
              $field['table'] === 'watchdog' &&
              $field['plugin_id'] == 'numeric' &&
              in_array($field['field'], ['wid', 'uid'])) {

            $save = TRUE;
            $new_value = $field;
            $new_value['plugin_id'] = 'standard';

            // Delete all the attributes related to numeric fields.
            unset(
              $new_value['set_precision'],
              $new_value['precision'],
              $new_value['decimal'],
              $new_value['separator'],
              $new_value['format_plural'],
              $new_value['format_plural_string'],
              $new_value['prefix'],
              $new_value['suffix']
            );
            $view->set("display.$display_name.display_options.fields.$field_name", $new_value);
          }
        }
      }

      // Iterate all filters looking for type filters to update.
      if (isset($display['display_options']['filters'])) {
        foreach ($display['display_options']['filters'] as $filter_name => $filter) {
          if (isset($filter['table']) &&
              $filter['table'] === 'watchdog' &&
              $filter['plugin_id'] == 'in_operator' &&
              $filter['field'] == 'type') {

            $save = TRUE;
            $filter['plugin_id'] = 'dblog_types';
            $view->set("display.$display_name.display_options.filters.$filter_name", $filter);
          }
        }
      }
    }

    if ($save) {
      $view->save();
    }
  }
}