cacheflush-8.x-1.x-dev/modules/cacheflush_advanced/cacheflush_advanced.module

<?php

/**
 * @file
 * Cacheflush Advanced module.
 */

use Drupal\Core\Cache\Cache;
use Drupal\Core\Form\FormStateInterface;

/**
 * Implements hook_cacheflush_ui_tabs().
 */
function cacheflush_advanced_cacheflush_ui_tabs() {
  $tabs = [
    'vertical_tabs_advance' => [
      'name' => t('Custom (advanced)'),
      'validation' => 'cacheflush_advanced_tab_validation',
      'weight' => -50,
    ],
  ];
  return $tabs;
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function cacheflush_advanced_form_cacheflush_add_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  _cacheflush_advanced_form($form, $form_state);
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function cacheflush_advanced_form_cacheflush_edit_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  _cacheflush_advanced_form($form, $form_state, 'edit');
}

/**
 * Form alter callback for add/edit cacheflush entity.
 */
function _cacheflush_advanced_form(&$form, &$form_state, $op = 'add') {

  $form['vertical_tabs_advance']['cacheflush_advanced_table'] = [
    '#type' => 'table',
    '#header' => [t('Cache ID'), t('Service'), t('Operations')],
    '#attributes' => [
      'id' => 'cacheflush-advanced-settings-table',
    ],
  ];

  // Add new row button.
  $form['vertical_tabs_advance']['advance_add'] = [
    '#name' => 'advance_add',
    '#type' => 'button',
    '#value' => t('Add another row'),
    '#ajax' => [
      'callback' => '_cacheflush_advanced_form_callback',
      'wrapper' => 'cacheflush-advanced-settings-table',
      'method' => 'replace',
      'effect' => 'fade',
    ],
  ];

  $form['vertical_tabs_advance']['note'] = [
    '#type' => 'item',
    '#title' => t('Note'),
    '#weight' => -10,
    '#description' => t('Create custom preset to clear cache by "cid".') .
    '<ul><li>' . t('<b>Cache ID ($cid)</b>: The cache ID to delete.') .
    '</li><li>' . t('<b>Bin</b>: Cache service.') .
    '</li></ul>',
  ];

  $trigger = $form_state->getTriggeringElement();
  if (isset($trigger)) {
    $table_elements = $form_state->getValues()['vertical_tabs_advance']['cacheflush_advanced_table'];

    // Check if Remove row and remove.
    if (strpos($trigger['#name'], 'advanced_remove_') === 0) {
      $remove_id = explode('advanced_remove_', $trigger['#name'])[1];
      unset($table_elements[$remove_id]);
    }

    // ReCreat table.
    if (isset($table_elements)) {
      foreach ($table_elements as $key => $value) {
        _cacheflush_advanced_table_row(
          $form['vertical_tabs_advance']['cacheflush_advanced_table'], $key, $value['cid'], $value['table']
        );
      }
    }

    // Check if Add row and add 1 more.
    if ($trigger['#name'] == 'advance_add') {
      $id = 1;
      if (isset($table_elements)) {
        $id = max(array_keys($table_elements)) + 1;
      }
      _cacheflush_advanced_table_row($form['vertical_tabs_advance']['cacheflush_advanced_table'], $id);
    }
  }
  else {
    if ($op == 'add') {
      _cacheflush_advanced_table_row($form['vertical_tabs_advance']['cacheflush_advanced_table'], 0);
    }
    else {
      $data = $form_state->getStorage()['data'];
      if (isset($data['advanced'])) {
        $container = \Drupal::getContainer();
        $bins = $container->getParameter('cache_bins');
        foreach ($data['advanced']['functions'] as $key => $value) {
          _cacheflush_advanced_table_row($form['vertical_tabs_advance']['cacheflush_advanced_table'], $key, $value['#params'][2], $bins[$value['#params'][0]]);
        }
      }
      else {
        _cacheflush_advanced_table_row($form['vertical_tabs_advance']['cacheflush_advanced_table'], 0);
      }
    }
  }

  // Add configuration widgets to define cache tags.
  $tags = [];
  if(!empty($data['cache_tags']['functions'])) {
    $tags = $data['cache_tags']['functions'][0]['#params'];
  }
  $form['vertical_tabs_advance']['cacheflush_advanced_cache_tags'] = [
    '#type' => 'textfield',
    '#title' => t('Cache tags'),
    '#description' => t('List of cache tags separated by comma.'),
    '#default_value' => reset($tags)
  ];
}

/**
 * Build cacheflush custom settings row form elements.
 *
 * @param array $element
 *   Form element.
 * @param int $delta
 *   Row weight.
 * @param string $cid
 *   Cache id to delete.
 * @param string $bin
 *   Cache service.
 *
 * @staticvar type $table_options
 *   Cache services options.
 */
function _cacheflush_advanced_table_row(array &$element, $delta, $cid = NULL, $bin = NULL) {
  static $table_options;

  if (empty($table_options)) {
    $module_handler = \Drupal::moduleHandler();
    $module_handler->invokeAll('cache_flush');
    foreach (Cache::getBins() as $service_id => $cache_backend) {
      $table_options[$service_id] = $service_id;
    }
    array_unshift($table_options, t("- Select a service -"));
  }

  $element[$delta]['cid'] = [
    '#type' => 'textfield',
    '#default_value' => $cid,
    '#size' => 20,
  ];
  $element[$delta]['table'] = [
    '#type' => 'select',
    '#default_value' => $bin,
    '#options' => $table_options,
  ];
  $element[$delta]['operations'] = [
    '#name' => 'advanced_remove_' . $delta,
    '#type' => 'button',
    '#value' => t('Remove'),
    '#ajax' => [
      'callback' => '_cacheflush_advanced_form_callback',
      'wrapper' => 'cacheflush-advanced-settings-table',
      'method' => 'replace',
      'effect' => 'fade',
    ],
  ];
}

/**
 * Implements advanced preset validation.
 */
function cacheflush_advanced_tab_validation($tab, $form, $form_state) {
  $element = $form_state->getTriggeringElement();
  if (isset($element['#name']) && ($element['#name'] == 'advance_add' || strpos($element['#name'], 'advanced_remove_') === 0)) {
    $form_state->clearErrors();
  }
  else {
    $storage = $form_state->getStorage();
    $table_elements = $form_state->getValues()['vertical_tabs_advance']['cacheflush_advanced_table'];
    if ($table_elements) {
      $container = \Drupal::getContainer();
      $bins = array_flip($container->getParameter('cache_bins'));
      foreach ($table_elements as $key => $value) {
        if (!empty($value['cid']) && $value['table'] == '0') {
          $form_state->setError($form['vertical_tabs_advance']['cacheflush_advanced_table'][$key]['table'], 'Service is required!');
        }
        elseif (empty($value['cid']) && $value['table'] != '0') {
          $form_state->setError($form['vertical_tabs_advance']['cacheflush_advanced_table'][$key]['cid'], 'Cache ID is required!');
        }
        elseif (!empty($value['cid'])) {
          $storage['presets']['advanced']['functions'][$key] = [
            '#name' => '\Drupal\cacheflush\Controller\CacheflushApi::clearBinCache',
            '#params' => [$bins[$value['table']], 'delete', $value['cid']],
          ];
        }
      }
    }

    // Store cache tags.
    if($tags = $form_state->getValues()['vertical_tabs_advance']['cacheflush_advanced_cache_tags']) {
      $storage['presets']['cache_tags'] = [
        'functions' => [
          [
            '#name' => "\Drupal\cacheflush\Controller\CacheflushApi::clearCacheTags",
            '#params' => [$tags]
          ]
        ]
      ];
    }

    $form_state->setStorage($storage);
  }
}

/**
 * AJAX callback for advanced table.
 *
 * @see ajax_get_form()
 */
function _cacheflush_advanced_form_callback(&$form, &$form_state, $request) {
  return $form['vertical_tabs_advance']['cacheflush_advanced_table'];
}