Current File : /home/vacivi36/ava/lib/lti1p3/src/MessageValidators/DeepLinkMessageValidator.php
<?php
namespace Packback\Lti1p3\MessageValidators;
use Packback\Lti1p3\Interfaces\IMessageValidator;
use Packback\Lti1p3\LtiConstants;
use Packback\Lti1p3\LtiException;
class DeepLinkMessageValidator implements IMessageValidator
{
public function canValidate(array $jwtBody)
{
return $jwtBody[LtiConstants::MESSAGE_TYPE] === 'LtiDeepLinkingRequest';
}
public function validate(array $jwtBody)
{
if (empty($jwtBody['sub'])) {
throw new LtiException('Must have a user (sub)');
}
if ($jwtBody[LtiConstants::VERSION] !== LtiConstants::V1_3) {
throw new LtiException('Incorrect version, expected 1.3.0');
}
if (!isset($jwtBody[LtiConstants::ROLES])) {
throw new LtiException('Missing Roles Claim');
}
if (empty($jwtBody[LtiConstants::DL_DEEP_LINK_SETTINGS])) {
throw new LtiException('Missing Deep Linking Settings');
}
$deep_link_settings = $jwtBody[LtiConstants::DL_DEEP_LINK_SETTINGS];
if (empty($deep_link_settings['deep_link_return_url'])) {
throw new LtiException('Missing Deep Linking Return URL');
}
if (empty($deep_link_settings['accept_types']) || !in_array('ltiResourceLink', $deep_link_settings['accept_types'])) {
throw new LtiException('Must support resource link placement types');
}
if (empty($deep_link_settings['accept_presentation_document_targets'])) {
throw new LtiException('Must support a presentation type');
}
return true;
}
}
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