advagg_mod.module

<?php


/**
 * @file
 * Advanced aggregation modifier module.
 */
use Drupal\advagg\Asset\AssetOptimizer;

/**
 * Implements hook_js_alter().
 */
function advagg_mod_js_alter(&$js) {
    if (!advagg_enabled()) {
        return;
    }
    $config = \Drupal::config('advagg_mod.settings');
    // Use the current file system path for advagg_mod.
    $module_path = drupal_get_path('module', 'advagg_mod');
    if (isset($js[$module_path . '/js/loadCSS.js'])) {
        if ($config->get('css_defer_js_code') === 4) {
            $js[$module_path . '/js/loadCSS.js']['type'] = 'external';
            $js[$module_path . '/js/loadCSS.js']['data'] = '//cdn.rawgit.com/filamentgroup/loadCSS/master/src/loadCSS.js';
            $js[$module_path . '/js/cssrelpreload.js']['type'] = 'external';
            $js[$module_path . '/js/cssrelpreload.js']['data'] = '//cdn.rawgit.com/filamentgroup/loadCSS/master/src/cssrelpreload.js';
        }
    }
    // Change sort order so aggregates do not get split up.
    if ($config->get('js_adjust_sort_external') || $config->get('js_adjust_sort_browsers')) {
        advagg_mod_sort_css_js($js, 'js');
    }
    // Force all JS to be preprocessed.
    if ($config->get('js_preprocess')) {
        foreach ($js as $path => &$values) {
            // However CKEditor must not be combined or errors *will* occur.
            if ($path == 'core/assets/vendor/ckeditor/ckeditor.js') {
                continue;
            }
            $values['preprocess'] = TRUE;
        }
        unset($values);
    }
    // Move all async JS to the header.
    if ($config->get('js_async_in_header')) {
        foreach ($js as &$values) {
            // Skip if not file or external.
            if ($values['type'] !== 'file' && $values['type'] !== 'external') {
                continue;
            }
            // Skip if not async.
            if (!$config->get('js_async') && empty($values['async']) && empty($values['attributes']['async'])) {
                continue;
            }
            // Move to the header with a group of 1000.
            $values['scope'] = 'header';
            $values['group'] = 1000;
        }
        unset($values);
    }
}

/**
 * Implements hook_css_alter().
 */
function advagg_mod_css_alter(&$css) {
    if (!advagg_enabled()) {
        return;
    }
    $config = \Drupal::config('advagg_mod.settings');
    if ($config->get('css_adjust_sort_external') || $config->get('css_adjust_sort_browsers')) {
        advagg_mod_sort_css_js($css, 'css');
    }
    // Force all CSS to be preprocessed.
    if ($config->get('css_preprocess')) {
        foreach ($css as &$values) {
            $values['preprocess'] = TRUE;
        }
        unset($values);
    }
}

/**
 * Implements hook_page_attachments_alter().
 */
function advagg_mod_page_attachments_alter(array &$page) {
    if (advagg_mod_css_defer_active()) {
        $page['#attached']['library'][] = 'advagg_mod/css_defer';
    }
}

/**
 * Rearrange CSS/JS so that aggregates are better grouped.
 *
 * This can move all external assets to the top, thus in one group.
 * This can move all browser conditional assets together.
 *
 * @param array $assets
 *   The CSS or JS array.
 * @param string $type
 *   String: css or js.
 */
function advagg_mod_sort_css_js(array &$assets, $type) {
    $config = \Drupal::config('advagg_mod.settings');
    if ($config->get($type . '_adjust_sort_external')) {
        // Find all external items.
        $external = [];
        $group = NULL;
        $weight = NULL;
        foreach ($assets as $key => $value) {
            // Set values if not set.
            if (is_null($group)) {
                $group = $value['group'];
            }
            if (is_null($weight)) {
                $weight = $value['weight'];
            }
            // Find "lightest" item.
            if ($value['group'] < $group) {
                $group = $value['group'];
            }
            if ($value['weight'] < $weight) {
                $weight = $value['weight'];
            }
            if (!empty($value['type']) && $value['type'] === 'external' && empty($value['movable'])) {
                $external[$key] = $value;
                unset($assets[$key]);
            }
        }
        // Sort the array so that it appears in the correct order.
        AssetOptimizer::sortStable($external);
        // Group all external together.
        $offset = 0.0001;
        $weight -= 1;
        $group -= 10;
        $found_jquery = FALSE;
        foreach ($external as $key => $value) {
            // If bootstrap is used, it must be loaded after jquery. Don't move
            // bootstrap if jquery is not above it.
            if ($key == 'assets/vendor/jquery/jquery.min.js') {
                $found_jquery = TRUE;
            }
            if (!$found_jquery && (strpos($value['data'], 'bootstrap.min.js') !== FALSE || strpos($value['data'], 'bootstrap.js') !== FALSE)) {
                $assets[$key] = $value;
                continue;
            }
            $value['group'] = $group;
            $value['weight'] = $weight;
            $weight += $offset;
            $assets[$key] = $value;
        }
    }
    if ($config->get($type . '_adjust_sort_browsers')) {
        // Get a list of browsers.
        $browsers_list = [];
        foreach ($assets as $key => $value) {
            if (isset($value['browsers']['IE']) && $value['browsers']['IE'] !== TRUE) {
                $browsers_list['IE'][] = $value['browsers']['IE'];
            }
        }
        // Group browsers CSS together.
        if (isset($browsers_list['IE'])) {
            $browsers_list['IE'] = array_values(array_unique($browsers_list['IE']));
            foreach ($browsers_list['IE'] as $browser) {
                $browsers = [];
                $group = NULL;
                $weight = NULL;
                foreach ($assets as $key => $value) {
                    if (isset($value['browsers']['IE']) && $browser === $value['browsers']['IE']) {
                        // Set values if not set.
                        if (is_null($group)) {
                            $group = $value['group'];
                        }
                        if (is_null($weight)) {
                            $weight = $value['weight'];
                        }
                        // Find "heaviest" item.
                        if ($value['group'] > $group) {
                            $group = $value['group'];
                        }
                        if ($value['weight'] > $weight) {
                            $weight = $value['weight'];
                        }
                        $browsers[$key] = $value;
                        unset($assets[$key]);
                    }
                }
                // Sort the array so that it appears in the correct order.
                AssetOptimizer::sortStable($browsers);
                // Group all browsers together.
                $offset = 0.0001;
                $group += 1000;
                foreach ($browsers as $key => $value) {
                    if (isset($value['movable']) && empty($value['movable'])) {
                        $assets[$key] = $value;
                        continue;
                    }
                    $value['group'] = $group;
                    $value['weight'] = $weight;
                    $weight += $offset;
                    $assets[$key] = $value;
                }
            }
        }
    }
}

/**
 * Determines whether css defering should be active for the current request.
 */
function advagg_mod_css_defer_active() {
    $config = \Drupal::config('advagg_mod.settings');
    if (!$config->get('css_defer')) {
        return FALSE;
    }
    $admin_route = \Drupal::service('router.admin_context')->isAdminRoute();
    if ($admin_route && !$config->get('css_defer_admin')) {
        return FALSE;
    }
    return TRUE;
}