details.php

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<?php
use Elgg\Exceptions\Http\BadRequestException;
use Elgg\Exceptions\Http\EntityPermissionsException;
use Elgg\Exceptions\Http\PageNotFoundException;
 
$user = get_entity((int) elgg_extract('user_guid', $vars));
$entity = get_entity((int) elgg_extract('entity_guid', $vars));
 
if (!$user instanceof \ElggUser || !$entity instanceof \ElggEntity) {
    throw new BadRequestException();
}
 
if (!$user->canEdit()) {
    throw new EntityPermissionsException();
}
 
$methods = elgg_get_notification_methods();
if (empty($methods)) {
    throw new PageNotFoundException();
}
 
$method_options = [];
foreach ($methods as $method) {
    $label = elgg_echo("notification:method:{$method}");
    $method_options[$label] = $method;
}
 
$detailed_subscriptions = [];
foreach ($entity->getSubscriptions($user->guid) as $subscription) {
    $parts = explode(':', $subscription->relationship);
    if (count($parts) > 2) {
        list(, $type, $subtype, $action, $method) = $parts;
        $detailed_subscriptions[$type][$subtype][$action][$method] = $method;
    }
}
 
$notification_events = elgg_get_notification_events();
$details = [];
foreach ($notification_events as $type => $subtypes) {
    foreach ($subtypes as $subtype => $actions) {
        foreach ($actions as $action => $handlers) {
            foreach ($handlers as $handler) {
                // can users configure this handler
                if (!$handler::isConfigurableByUser()) {
                    continue;
                }
                
                // can this handler be configured for the current container
                if (!$handler::isConfigurableForEntity($entity)) {
                    continue;
                }
                
                $label = elgg_echo("notification:{$type}:{$subtype}:{$action}");
                $details[$label] = elgg_view_field([
                    '#type' => 'checkboxes',
                    '#label' => $label,
                    '#class' => 'elgg-subscription-details',
                    'name' => "subscriptions[{$entity->guid}][notify:{$type}:{$subtype}:{$action}]",
                    'options' => $method_options,
                    'value' => $detailed_subscriptions[$type][$subtype][$action] ?? [],
                    'align' => 'horizontal',
                ]);
                
                // only show one checkbox per action
                break;
            }
        }
    }
}
 
if (empty($details)) {
    echo elgg_view_no_results(elgg_echo('notifications:subscriptions:details:no_results'));
    return;
}
 
ksort($details, SORT_NATURAL | SORT_FLAG_CASE);
echo implode('', $details);
 
echo elgg_view_field([
    '#type' => 'fieldset',
    'align' => 'horizontal',
    'justify' => 'right',
    'fields' => [
        [
            '#type' => 'button',
            'text' => elgg_echo('notifications:subscriptions:details:reset'),
            'class' => ['elgg-button-delete', 'elgg-subscriptions-details-reset'],
        ],
    ],
]);