public function ChartsPluginStyleChart::validate in Charts 8

Same name and namespace in other branches

1. 8.4 src/Plugin/views/style/ChartsPluginStyleChart.php \Drupal\charts\Plugin\views\style\ChartsPluginStyleChart::validate()
2. 8.3 src/Plugin/views/style/ChartsPluginStyleChart.php \Drupal\charts\Plugin\views\style\ChartsPluginStyleChart::validate()
3. 5.0.x src/Plugin/views/style/ChartsPluginStyleChart.php \Drupal\charts\Plugin\views\style\ChartsPluginStyleChart::validate()

Validate that the plugin is correct and can be saved.

Return value

An array of error strings to tell the user what is wrong with this plugin.

Overrides StylePluginBase::validate

File

src/Plugin/views/style/ChartsPluginStyleChart.php, line 115

Class

ChartsPluginStyleChart

Style plugin to render view as a chart.

Namespace

Drupal\charts\Plugin\views\style

Code

public function validate() {
  $errors = parent::validate();
  $dataFields = $this->options['data_fields'];
  $dataFieldsValueState = array();
  $dataFieldsCounter = 0;
  foreach ($dataFields as $value) {

    /*if (count(array_unique($plugin)) === 1 && end($plugin) === 0) {
          $errors[] = $this->t('At least one data field must be selected in the chart configuration before this chart may be shown');
      }*/

    /*Skip title field no need to validate it and if data field is set add to dataFieldsValueState array state 1
      otherwise add to same array state 0*/
    if ($dataFieldsCounter > 0) {
      if (empty($value)) {
        array_push($dataFieldsValueState, 0);
      }
      else {
        array_push($dataFieldsValueState, 1);
      }
    }
    $dataFieldsCounter++;
  }

  /*If total sum of dataFieldsValueState is less than 1, then no dataFields were selected otherwise 1 or more selected
    total sum will be greater than 1*/
  if (array_sum($dataFieldsValueState) < 1) {
    $errors[] = $this
      ->t('At least one data field must be selected in the chart configuration before this chart may be shown');
  }
  return $errors;
}