Module.php

<?php declare(strict_types=1);

namespace Diva;

if (!class_exists(\Generic\AbstractModule::class)) {
    require file_exists(dirname(__DIR__) . '/Generic/AbstractModule.php')
        ? dirname(__DIR__) . '/Generic/AbstractModule.php'
        : __DIR__ . '/src/Generic/AbstractModule.php';
}

use Generic\AbstractModule;
use Laminas\EventManager\Event;
use Laminas\EventManager\SharedEventManagerInterface;
use Laminas\Mvc\MvcEvent;
use Omeka\Module\Exception\ModuleCannotInstallException;
use Omeka\Module\Manager as ModuleManager;

class Module extends AbstractModule
{
    const NAMESPACE = __NAMESPACE__;

    public function onBootstrap(MvcEvent $event): void
    {
        parent::onBootstrap($event);

        $acl = $this->getServiceLocator()->get('Omeka\Acl');
        $acl->allow(null, ['Diva\Controller\Player']);
    }

    protected function preInstall(): void
    {
        $js = __DIR__ . '/asset/vendor/diva/diva.js';
        if (!file_exists($js)) {
            $t = $this->getServiceLocator()->get('MvcTranslator');
            throw new ModuleCannotInstallException(
                $t->translate('The Diva library should be installed.') // @translate
                   . ' ' . $t->translate('See module’s installation documentation.') // @translate
            );
        }
    }

    public function attachListeners(SharedEventManagerInterface $sharedEventManager): void
    {
        /*
        $sharedEventManager->attach(
            'Omeka\Controller\Site\Item',
            'view.browse.after',
            [$this, 'handleViewBrowseAfterItem']
        );

        $sharedEventManager->attach(
            'Omeka\Controller\Site\ItemSet',
            'view.browse.after',
            [$this, 'handleViewBrowseAfterItemSet']
        );
        */

        $sharedEventManager->attach(
            'Omeka\Controller\Site\Item',
            'view.show.after',
            [$this, 'handleViewShowAfterItem']
        );
    }

    public function handleViewBrowseAfterItem(Event $event): void
    {
        $view = $event->getTarget();
        $services = $this->getServiceLocator();
        // Note: there is no item-set show, but a special case for items browse.
        $isItemSetShow = (bool) $services->get('Application')
            ->getMvcEvent()->getRouteMatch()->getParam('item-set-id');
        if ($isItemSetShow) {
            echo $view->diva($view->itemSet);
        } elseif ($this->iiifServerIsActive()) {
            echo $view->diva($view->items);
        }
    }

    public function handleViewBrowseAfterItemSet(Event $event): void
    {
        if (!$this->iiifServerIsActive()) {
            return;
        }

        $view = $event->getTarget();
        echo $view->diva($view->itemSets);
    }

    public function handleViewShowAfterItem(Event $event): void
    {
        $view = $event->getTarget();
        echo $view->diva($view->item);
    }

    protected function iiifServerIsActive()
    {
        static $iiifServerIsActive;

        if (is_null($iiifServerIsActive)) {
            $module = $this->getServiceLocator()
                ->get('Omeka\ModuleManager')
                ->getModule('IiifServer');
            $iiifServerIsActive = $module && $module->getState() === ModuleManager::STATE_ACTIVE;
        }
        return $iiifServerIsActive;
    }
}