uw_fdsu_theme_resp.theme

<?php

/**
 * @file
 * Theme file for uw_fdsu_theme_resp.
 */

use Drupal\taxonomy\Entity\Term;
use Drupal\Core\Datetime;
use Drupal\Core\DateTimeZone;

/**
 * @file
 * Functions to support theming.
 */

require_once dirname(__FILE__) . '/includes/block.inc';
require_once dirname(__FILE__) . '/includes/field.inc';
require_once dirname(__FILE__) . '/includes/form.inc';
require_once dirname(__FILE__) . '/includes/html.inc';
require_once dirname(__FILE__) . '/includes/navigation.inc';
require_once dirname(__FILE__) . '/includes/taxonomy.inc';
require_once dirname(__FILE__) . '/includes/views.inc';

/**
 * Implements hook_preprocess_HOOK().
 *
 * Setting the faculty class colour.
 */
function uw_fdsu_theme_resp_preprocess_html(&$variables) {

  // Adding the faculty colour class to the body.
  $variables['attributes']['class'][] = theme_get_setting('wcms_colour_scheme', 'uw_fdsu_theme_resp') ? theme_get_setting('wcms_colour_scheme', 'uw_fdsu_theme_resp') : 'org-default';
}

/**
 * Implements hook_preprocess_responsive_image().
 */
function uw_fdsu_theme_resp_preprocess_responsive_image(&$variables) {

  // Step through each of the responsive image objects and get out source info.
  foreach ($variables['sources'] as $source) {

    // Set the a variable with the actual source info that we need.
    $new_sources[] = array(
      'srcset' => $source['srcset']->value(),
      'media' => $source['media']->value(),
      'type' => $source['type']->value(),
    );
  }

  // Set the sources variable to the new sources.
  $variables['sources'] = $new_sources;
}

/**
 * Implements hook_preprocess_region().
 */
function uw_fdsu_theme_resp_preprocess_region(&$variables) {

  // Get the region from variables.
  $region = $variables['elements']['#region'];

  // If we are on the header, add the correct header classes
  // TO DO: Store the colour scheme used for the theme
  // (i.e. faculty colour and get the correct class here).
  if ($region == "header") {

    // The class that is used for the header.
    $variables['classes'][] = 'uw-header';

    $variables['faculty'] = theme_get_setting('wcms_colour_scheme', 'uw_fdsu_theme_resp') ? theme_get_setting('wcms_colour_scheme', 'uw_fdsu_theme_resp') : 'org-default';
  }
}

/**
 * Implements hook_FORM_ID_alter.
 *
 * Add settings for colour scheme.
 */
function uw_fdsu_theme_resp_form_system_theme_settings_alter(&$form, \Drupal\Core\Form\FormStateInterface &$form_state, $form_id = NULL) {

  // Work-around for a core bug affecting admin themes. See issue #943212.
  if (isset($form_id)) {
    return;
  }

  // Fieldset for colour scheme.
  $form['colour_scheme'] = array(
    '#type' => 'details',
    '#open' => TRUE,
    '#title' => t('Colour scheme'),
  );

  // Colour scheme select list.
  $form['colour_scheme']['wcms_colour_scheme'] = array(
    '#type'          => 'select',
    '#default_value' => theme_get_setting('wcms_colour_scheme', 'uw_fdsu_theme_resp') ? theme_get_setting('wcms_colour_scheme', 'uw_fdsu_theme_resp') : 'default',
    '#description'   => t("Select a color scheme to use"),
    '#options' => [
      'org-default' => 'Default (yellow/red)',
      'org-ahs' => 'Applied Health Sciences (teal)',
      'org-art' => 'Arts (orange)',
      'org-eng' => 'Engineering (purple)',
      'org-env' => 'Environment (green)',
      'org-mat' => 'Mathematics (pink)',
      'org-sci' => 'Science (blue)',
      'org-school' => 'School (red)',
    ],
  );
}

/**
 * Get the specified field value from a paragraph.
 *
 * @param object $paragraph
 *   The paragraph object.
 * @param string $field
 *   The name of the field.
 *
 * @return mixed
 *   The field value.
 */
function _uw_fdsu_theme_resp_get_field_value_from_paragraph($paragraph, $field) {

  // Get the field value.
  $field_value = $paragraph->get($field)->first();

  return $field_value->getValue()['value'];
}

/**
 * Set the variables required for a responsive image.
 *
 * @param array $variables
 *   The variables array.
 * @param object $field
 *   The field object.
 * @param string $responsive_image_style
 *   The ID of the responsive image style.
 *
 * @return array|null
 *   An array with keys:
 *    - sources: An array of image sources.
 *    - alt: The alternative text.
 */
function _uw_fdsu_theme_resp_add_responsive_image_variables(array &$variables, Drupal\image\Plugin\Field\FieldType\ImageItem $field, string $responsive_image_style) : ?array {

  // If there is a file present, set responsive image variables.
  if ($file = $field->entity) {

    // Set uri and image style id.
    $variables['uri'] = $file->getFileUri();
    $variables['responsive_image_style_id'] = $responsive_image_style;

    // Call template function from responsive image core module.
    // It sets variables for srcset, media, type and img_element
    // for the responsive image style.
    template_preprocess_responsive_image($variables);

    // Step through each source and get string values.
    $sources = [];

    foreach ($variables['sources'] as $source) {

      $sources[] = [
        'srcset' => $source['srcset']->value(),
        'media' => $source['media']->value(),
        'type' => $source['type']->value(),
      ];
    }

    return [
      'sources' => $sources,
      'alt' => $field->get('alt')->getValue(),
    ];
  }
  return NULL;
}

/**
 * Get image properties from an image field.
 *
 * @param object $field
 *   The image field.
 *
 * @return array|null
 *   An array of image properties or NULL if $field does not contain the
 *   required information.
 */
function _uw_fdsu_theme_resp_get_image_info(Drupal\file\Plugin\Field\FieldType\FileFieldItemList $field) {

  // If there is an image, process it.
  if ($img_entity = $field->first()) {

    // If we can load a file, grab the info about the file.
    if ($file_entity = $img_entity->get('entity')->getTarget()) {

      return [
        'src' => file_create_url($file_entity->get('uri')->getString()),
        'alt' => $img_entity->get('alt')->getString(),
      ];
    }
  }
}