private function Selection::readData in Flot 8

Fetch the raw data from the data file.

File

flot_examples/src/Controller/Selection.php, line 69

Class

Selection

Display a chart that demonstrates region selection and zooming.

Namespace

Drupal\flot_examples\Controller

Code

private function readData() {
  $filename = "CO2CountryData.txt";
  $file_path = DRUPAL_ROOT . '/' . drupal_get_path('module', 'flot_examples') . '/src/Controller/' . $filename;
  $file = fopen($file_path, "r") or die("Unable to open file: {$file_path}");
  $countries = [
    $this
      ->t("United States"),
    $this
      ->t("Russia"),
    $this
      ->t("United Kingdom"),
    $this
      ->t("Germany"),
    $this
      ->t("Denmark"),
    $this
      ->t("Sweden"),
    $this
      ->t("Norway"),
  ];
  $data = [];
  foreach ($countries as $key => $country) {
    $data[$key]['label'] = $country;
  }
  while (!feof($file)) {
    $line = fgets($file);
    $values = explode(', ', $line);
    if (count($values) > 1) {
      foreach ($countries as $key => $country) {
        if ($values[$key + 1] != "") {
          $data[$key]['data'][] = [
            $values[0],
            $values[$key + 1],
          ];
        }
      }
    }
  }
  fclose($file);
  return $data;
}