delete.php

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<?php
$id = (int) get_input('id');
if ($id < 1) {
    return elgg_error_response(elgg_echo('error:missing_data'));
}

$annotation = elgg_get_annotation_from_id($id);
if (!$annotation instanceof ElggAnnotation) {
    return elgg_error_response(elgg_echo('error:missing_data'));
}

if (!$annotation->canEdit()) {
    return elgg_error_response(elgg_echo('actionunauthorized'));
}

$ok_content = [
    'annotation' => $annotation->toObject(),
];

if (!$annotation->delete()) {
    $lan_key = "annotation:delete:{$annotation->name}:fail";
    if (!elgg_language_key_exists($lan_key)) {
        $lan_key = 'annotation:delete:fail';
    }
    
    return elgg_error_response(elgg_echo($lan_key));
}

$lan_key = "annotation:delete:{$annotation->name}:success";
if (!elgg_language_key_exists($lan_key)) {
    $lan_key = 'annotation:delete:success';
}

return elgg_ok_response($ok_content, elgg_echo($lan_key));