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📄 AbstractMessageValidator.php(1.1 KB)
📄 DeepLinkMessageValidator.php(1.15 KB)
📄 ResourceMessageValidator.php(568 B)
📄 SubmissionReviewMessageValidator.php(705 B)

Editing: DeepLinkMessageValidator.php

<?php

namespace Packback\Lti1p3\MessageValidators;

use Packback\Lti1p3\LtiConstants;
use Packback\Lti1p3\LtiException;

class DeepLinkMessageValidator extends AbstractMessageValidator
{
    public static function getMessageType(): string
    {
        return LtiConstants::MESSAGE_TYPE_DEEPLINK;
    }

public static function validate(array $jwtBody): void
    {
        static::validateGenericMessage($jwtBody);

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');
        }
    }
}

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Editing: DeepLinkMessageValidator.php

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