public function WeatherCurrentBlock::build in Wunderground weather 8

Builds and returns the renderable array for this block plugin.

If a block should not be rendered because it has no content, then this method must also ensure to return no content: it must then only return an empty array, or an empty array with #cache set (with cacheability metadata indicating the circumstances for it being empty).

Return value

array A renderable array representing the content of the block.

Overrides BlockPluginInterface::build

See also

\Drupal\block\BlockViewBuilder

File

src/Plugin/Block/WeatherCurrentBlock.php, line 159

Contains \Drupal\wunderground_weather\Plugin\Block\WeatherCurrentBlock.

Class

WeatherCurrentBlock

Provides a block with current weather conditions.

Namespace

Drupal\wunderground_weather\Plugin\Block

Code

public function build() {

  // Get block configuration.
  $config = $this
    ->getConfiguration();
  $location = $config['location_current'];
  $icon_set = $config['icon_set'];
  $temperature_scale = $config['temperature_scale'];
  $windspeed_scale = $config['windspeed_scale'];

  // Get all settings.
  $settings = $this->wundergroundWeatherManager
    ->getSettings();
  preg_match('#\\[(.*?)\\]#', $location, $match);
  $path = $match[1];
  $options = [
    'api' => 'api',
    'key' => $settings
      ->get('api_key'),
    'data_feature' => 'conditions',
    'language' => 'lang:' . strtoupper($settings
      ->get('language')),
    'path' => $path,
  ];

  // Check if data is received.
  if ($weather = $this->wundergroundWeatherManager
    ->requestData($options)) {

    // Get fields to be displayed.
    $fields = $this->configuration['current_fields'];

    // Build list items.
    $items = [];
    foreach ($fields as $field => $display) {
      if ($display && isset($weather->current_observation)) {

        // Calculate windspeed.
        switch ($windspeed_scale) {
          case 'mph':
            $windspeed = $weather->current_observation->wind_mph;
            break;
          case 'kph':
            $windspeed = $weather->current_observation->wind_kph;
            break;
          default:
            $wind_kph = $weather->current_observation->wind_kph;
            $windspeed = $this->wundergroundWeatherManager
              ->windSpeedToBeaufort($wind_kph, 'kph');
            break;
        }
        switch ($field) {
          case 'weather':
            $items[$field] = $weather->current_observation->weather;
            break;
          case 'temperature':
            $temperature_property = 'temp_' . $temperature_scale;
            $items[$field] = t('Temperature: @temp °@scale', [
              '@temp' => $weather->current_observation->{$temperature_property},
              '@scale' => strtoupper($temperature_scale),
            ]);
            break;
          case 'feels_like':
            $temperature_property = 'feelslike_' . $temperature_scale;
            $items[$field] = t('Feels like: @temp °@scale', [
              '@temp' => $weather->current_observation->{$temperature_property},
              '@scale' => strtoupper($temperature_scale),
            ]);
            break;
          case 'wind':
            $items[$field] = t('Wind');
            $items[$field] .= ': ' . $windspeed . ' ' . $windspeed_scale;
            break;
        }
      }
    }

    // Get an unordered list.
    $item_list = [
      '#theme' => 'item_list',
      '#list_type' => 'ul',
      '#items' => $items,
      '#title' => '',
      '#attributes' => [
        'class' => [
          'current-weather-summary',
        ],
      ],
    ];

    // Get the weather icon.
    $variables = [
      '#theme' => 'wunderground_weather_current',
      '#iconset' => $icon_set,
      '#image' => [
        '#theme' => 'image',
        '#uri' => $this->wundergroundWeatherManager
          ->getIconUrl($config['icon_set'], $weather->current_observation->icon),
        '#alt' => t('Weather in @city', [
          '@city' => $weather->current_observation->display_location->full,
        ]),
      ],
      '#summary' => $item_list,
    ];
    $output = render($variables);
  }
  else {

    // Return message if no data is retrieved.
    $output = t('No weather forecast available.');
  }
  return [
    '#children' => $output,
  ];
}