<?php
/**
 * @file
 * Paragraph-related functions.
 */

use Drupal\node\NodeInterface;
use Drupal\taxonomy\Entity\Term;

/**
 * Implements Implements hook_preprocess_paragraph().
 */
function cdesai_emulsify_preprocess_paragraph(&$variables) {
  // allow page_type and sub_page_type variables
  // to be used within Twig to control styling on a per
  // paragraph basis, e.g., currently used for TAR pages.
  $paragraph = $variables['elements']['#paragraph'];
  $renderer = \Drupal::service('renderer');
  $parent = $paragraph->getParentEntity();
  $renderer->addCacheableDependency($variables, $parent);
  // Check if the node is on a page with the page type field.
  if ($parent instanceof NodeInterface &&
    $parent->bundle() == 'page' &&
    $parent->hasField('field_page_type') &&
    !$parent->get('field_page_type')->isEmpty()
  ) {
    $pageTypes = $parent->get('field_page_type')->referencedEntities();
    $pageTypeTerm = reset($pageTypes);
    $renderer->addCacheableDependency($variables, $pageTypeTerm);
    // If the term is a child term, set the parent to page type.
    if ($pageTypeTerm->parent->target_id !== "0") {
      $parentTerm = Term::load($pageTypeTerm->parent->target_id);
      $renderer->addCacheableDependency($variables, $parentTerm);
      $variables['page_type'] = $parentTerm->getName();
      $variables['sub_page_type'] = $pageTypeTerm->getName();
    }
    // Otherwise, set the term to page type.
    else {
      $variables['page_type'] = $pageTypeTerm->getName();
    }
  }
}

/**
 * Implements hook_preprocess_paragraph__PARAGRAPH_TYPE().
 */
function cdesai_emulsify_preprocess_paragraph__excerpt(&$variables) {
  $content = &$variables['content'];

  // check for field_url and update the link text to 'View Source'
  // when the link text value contains the same value as the URL,
  // which is the default behavior when no link text is provided.
  if (isset($content['field_url']) & !empty($content['field_url'])) {
    if (isset($content['field_url'][0]['#title'])) {
      $urlString = $content['field_url'][0]['#url']->toString();
      if ($content['field_url'][0]['#title'] == $urlString) {
        $content['field_url'][0]['#title'] = 'View Source';
      }
    }
  }

}

/**
 * Implements hook_preprocess_paragraph__PARAGRAPH_TYPE().
 */
function cdesai_emulsify_preprocess_paragraph__media_item(&$variables) {
  $content = &$variables['content'];
  $parent = $variables['elements']['#paragraph']->getParentEntity();
  if (isset($content['field_caption_hide'][0]['#markup'])) {
    switch ($content['field_caption_hide'][0]['#markup']) {
      case 'No':
        if (!isset($content['field_caption'][0])) {
          // check for media and if the field body is not empty
          if (isset($content['field_media'][0])) {
            $media = $content['field_media'][0]['#media'];
            if ($media->hasField('field_body') && !$media->get('field_body')->isEmpty()) {
              $field_body = $media->get('field_body')->getValue();
              $paragraph = &$variables['paragraph'];
              // copy field body to field caption
              $paragraph->field_caption->value = $field_body[0]['value'];
              // render field_caption with parent view_mode
              $content['field_caption'] = $paragraph->field_caption->view($variables['view_mode']);
              $content['field_caption'][0]['#format'] = 'limited_html';
            }
          }
        }
      break;
      case 'Yes':
        // hide caption is checked
        if (isset($content['field_caption'][0])) {
          unset($content['field_caption'][0]);
        }
      break;
    }
  }
  // Remove the default alignment from media items unless added to a Basic
  // paragraph.
  if ($parent->getEntityTypeId() != 'paragraph' ||
    $parent->bundle() != 'basic') {
    $content['field_media_alignment'] = false;
  }
}

/**
 * Implements hook_preprocess_paragraph__PARAGRAPH_TYPE().
 */
function cdesai_emulsify_preprocess_paragraph__header(&$variables) {
  /** @var \Drupal\paragraphs\ParagraphInterface $paragraph */
  $paragraph = $variables['paragraph'];
  $parent = $paragraph->getParentEntity();

  if ($parent->hasField('field_date') && $parent->get('field_date')->count() > 0) {
    $date = $parent->get('field_date')->get(0)->getValue();
    // See /admin/config/regional/date-time for date formats.
    $variables['header_date'] = \Drupal::service('date.formatter')->format(strtotime($date['value']), 'header_date');
  }

  // Get the URL of the parent node for teaser headers.
  if ($variables['view_mode'] == 'teaser_header') {
    if ($parent instanceof NodeInterface) {
      $variables['node_url'] = $parent->toUrl()->toString();
      $renderer = \Drupal::service('renderer');
      $renderer->addCacheableDependency($variables, $parent);
    }
  }
}

/**
 * Implements hook_preprocess_paragraph__PARAGRAPH_TYPE().
 */
function cdesai_emulsify_preprocess_paragraph__horizontal_tabs(&$variables) {
  // Get title fields of all nested tabs for use in the tab list,
  // and set a unique prefix for tab element IDs to avoid collisions when
  // multiple tabs are included on a page.
  $tabs = \Drupal\Core\Render\Element::children($variables['content']['field_tabs']);
  $tabId = \Drupal\Component\Utility\Html::getUniqueId('tab');
  foreach ($tabs as $tabIndex) {
    $paragraph = $variables['content']['field_tabs'][$tabIndex]['#paragraph'];
    if ($paragraph->hasField('field_title')) {
      $title = $paragraph->get('field_title');
      $variables['content']['tab_titles'][$tabIndex] = $title->view('horizontal_tab');
      $variables['content']['tab_titles'][$tabIndex]['#id_prefix'] = $tabId;
    }
    $variables['content']['field_tabs'][$tabIndex]['#id_prefix'] = $tabId;
  }
}

/**
 * Implements hook_preprocess_paragraph__PARAGRAPH_TYPE().
 */
function cdesai_emulsify_preprocess_paragraph__tab__horizontal_tab(&$variables) {
  if (!empty($variables['elements']['#id_prefix'])) {
    $variables['id_prefix'] = $variables['elements']['#id_prefix'];
  }
}