/**
  * Diagnosis of admin settings.
  *
  */
 private function diagnose_admin_screen()
 {
     // Check version and compatibility
     if (version_compare(get_bloginfo('version'), '3.7') < 0) {
         $this->add_admin_notice('error', __('You need WordPress 3.7+.', IP_Geo_Block::TEXT_DOMAIN));
     }
     // Check consistency of matching rule
     $settings = IP_Geo_Block::get_option('settings');
     if (-1 == $settings['matching_rule']) {
         $this->add_admin_notice('notice-warning', sprintf(__('Welcome to %s!! At first, please confirm &#8220;<strong>Matching rule</strong>&#8221; at <a href="%s">Validation rule settings</a>.', IP_Geo_Block::TEXT_DOMAIN), __('IP Geo Block', IP_Geo_Block::TEXT_DOMAIN), admin_url('options-general.php?page=' . IP_Geo_Block::PLUGIN_SLUG)));
     } elseif (1 == $settings['validation']['login']) {
         $validate = IP_Geo_Block::get_geolocation();
         $validate = IP_Geo_Block::validate_country($validate, $settings);
         if ('passed' !== $validate['result']) {
             $url = admin_url('options-general.php?page=' . IP_Geo_Block::PLUGIN_SLUG . '#' . IP_Geo_Block::PLUGIN_SLUG);
             $this->add_admin_notice('error', sprintf(__('You\'ll be blocked after you log out. Please confirm &#8220;<strong>Matching rule</strong>&#8221; and &#8220;<strong>Country code for matching rule</strong>&#8221; at <a href="%s">Validation rule settings</a>. Otherwise select &#8220;<strong>Block by country (register, lost password)</strong>&#8221; for &#8220;<strong>Login form</strong>&#8221; at <a href="%s">Validation target settings</a>.', IP_Geo_Block::TEXT_DOMAIN), "{$url}-settings-0", "{$url}-settings-1"));
         }
     }
     if (defined('IP_GEO_BLOCK_DEBUG') && IP_GEO_BLOCK_DEBUG) {
         // Check creation of database table
         if ($settings['validation']['reclogs']) {
             require_once IP_GEO_BLOCK_PATH . 'classes/class-ip-geo-block-logs.php';
             if (($warn = IP_Geo_Block_Logs::diag_table()) && FALSE === IP_Geo_Block_Logs::create_log()) {
                 $this->add_admin_notice('notice-warning', $warn);
             }
         }
     }
 }