YAMLFrontMatterExporter.php in Loft Data Grids 7.2

Namespace

AKlump\LoftDataGrids

File

vendor/aklump/loft_data_grids/src/AKlump/LoftDataGrids/YAMLFrontMatterExporter.php

<?php

namespace AKlump\LoftDataGrids;

use Symfony\Component\Yaml\Yaml;

/**
 * Class YAMLFrontMatterExporter
 *
 * @link http://symfony.com/doc/current/components/yaml/introduction.html
 * @link http://assemble.io/docs/YAML-front-matter.html
 */
class YAMLFrontMatterExporter extends Exporter implements ExporterInterface {
  public function __construct(ExportDataInterface $data = null, $filename = '') {
    parent::__construct($data, $filename);
    unset($this->extension);
  }

  /**
   * We use this magic method to have a configurable extension
   *
   * @param $key
   *
   * @return null
   */
  public function __get($key) {
    if ($key === 'extension') {
      return $this->settings->extension;
    }
    return null;
  }
  protected function setSettingsDefault() {
    parent::setSettingsDefault();

    /**
     * This is the data key used to fill the body of the file; every other key will be interpreted as YAML frontmatter.
     */
    $this->settings->bodyKey = 'body';
    $this->settings->extension = '.html';
    return $this;
  }
  public function getInfo() {
    $info = parent::getInfo();
    $info = array(
      'name' => 'YAML Front Matter Format',
      'shortname' => 'YAML Front Matter',
      'description' => 'Export data as text file with YAML Front Matter. For more information visit: http://www.yaml.org.',
    ) + $info;
    return $info;
  }
  public function compile($page_id = null) {
    $bodyKey = $this->settings->bodyKey;

    // We will only operate on the current page.
    $data = $this
      ->getData()
      ->getPage();

    // We ignore all but the first row
    $row = reset($data);
    $build = array();
    $this->output = '';
    if ($data) {
      $build[] = '---';
      if ($build['fm'] = array_diff_key($row, array(
        $bodyKey => null,
      ))) {
        $build['fm'] = trim(Yaml::dump($build['fm']));
      }
      $build[] = '---';
      if (empty($build['fm'])) {
        $build = array();
      }
      $build['body'] = isset($row[$bodyKey]) ? $row[$bodyKey] : '';
      $this->output = implode(PHP_EOL, $build);
    }
    return $this;
  }

}

Classes

Name	Description
YAMLFrontMatterExporter	Class YAMLFrontMatterExporter