RegisterSubscriptionMenuItemsHandler.php

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<?php
 
namespace Elgg\Notifications;
 
use Elgg\Menu\MenuItems;
 
class RegisterSubscriptionMenuItemsHandler {
    
    public function __invoke(\Elgg\Event $event) {
        $result = $event->getValue();
        $entity = $event->getEntityParam();
        if (!$result instanceof MenuItems || !$entity instanceof \ElggEntity) {
            return;
        }
        
        $user = elgg_get_logged_in_user_entity();
        if (!$user instanceof \ElggUser) {
            return;
        }
        
        $link_classes = [];
        if ($event->getParam('name') === 'title') {
            $link_classes = [
                'elgg-button',
                'elgg-button-action',
            ];
        }
        
        elgg_deprecated_notice(__CLASS__ . ' has been deprecated, use the "subscribable" capability', '6.3');
        
        $can_subscribe = !$entity->hasSubscriptions() || $entity->hasMutedNotifications();
        
        // subscribe
        $subscribe_options = [
            'name' => 'entity_subscribe',
            'icon' => 'bell',
            'text' => elgg_echo('entity:subscribe'),
            'href' => false,
            'item_class' => $can_subscribe ? '' : 'hidden',
            'link_class' => $link_classes,
        ];
        
        // check if it makes sense to enable the subscribe button
        $has_preferences = !empty($user->getNotificationSettings('default', true));
        if ($has_preferences) {
            $subscribe_options['href'] = elgg_generate_action_url('entity/subscribe', [
                'guid' => $entity->guid,
            ]);
            $subscribe_options['data-toggle'] = 'entity_mute';
        } else {
            $subscribe_options['link_class'][] = 'elgg-state-disabled';
            $subscribe_options['title'] = elgg_echo('entity:subscribe:disabled');
        }
        
        $result[] = \ElggMenuItem::factory($subscribe_options);
        
        // mute
        $result[] = \ElggMenuItem::factory([
            'name' => 'entity_mute',
            'icon' => 'bell-slash',
            'text' => elgg_echo('entity:mute'),
            'href' => elgg_generate_action_url('entity/mute', [
                'guid' => $entity->guid,
            ]),
            'item_class' => $can_subscribe ? 'hidden' : '',
            'link_class' => $link_classes,
            'data-toggle' => 'entity_subscribe',
        ]);
        
        return $result;
    }
}