class.ilWACPath.php

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<?php

// declare(strict_types=1);
class ilWACPath
{
    public const DIR_DATA = "data";
    public const DIR_SEC = "sec";
    public const REGEX = "(?<prefix>.*?)(?<path>(?<path_without_query>(?<secure_path_id>(?<module_path>\/data\/(?<client>[\w\-\.]*)\/(?<sec>sec\/|)(?<module_type>.*?)\/(?<module_identifier>.*\/|)))(?<appendix>[^\?\n]*)).*)";
    protected static array $image_suffixes = [
        'png',
        'jpg',
        'jpeg',
        'gif',
        'svg',
    ];
    protected static array $video_suffixes = [
        'mp4',
        'm4v',
        'mov',
        'wmv',
        'webm',
    ];
    protected static array $audio_suffixes = [
        'mp3',
        'aiff',
        'aif',
        'm4a',
        'wav',
    ];

    protected string $client = '';
    protected array $parameters = [];
    protected bool $in_sec_folder = false;
    protected string $token = '';
    protected int $timestamp = 0;
    protected int $ttl = 0;
    protected string $secure_path = '';
    protected string $secure_path_id = '';
    protected string $original_request = '';
    protected string $file_name = '';
    protected string $query = '';
    protected string $suffix = '';
    protected string $prefix = '';
    protected string $appendix = '';
    protected string $module_path = '';
    protected string $path = '';
    protected string $module_type = '';
    protected string $module_identifier = '';
    protected string $path_without_query = '';

    public function __construct(string $path)
    {
        $path = $this->normalizePath($path);

        $this->setOriginalRequest($path);
        $re = '/' . self::REGEX . '/';
        preg_match($re, $path, $result);

        $result['path_without_query'] = strstr(
            parse_url($path)['path'],
            '/data/',
            false
        );


        foreach (array_keys(array_keys($result)) as $k) {
            if (is_numeric($k)) {
                unset($result[$k]);
            }
        }

        $moduleId = strstr(
            !isset($result['module_identifier']) || is_null($result['module_identifier']) ? '' : $result['module_identifier'],
            '/',
            true
        );
        $moduleId = $moduleId === false ? '' : $moduleId;

        $this->setPrefix(!isset($result['prefix']) || is_null($result['prefix']) ? '' : $result['prefix']);
        $this->setClient(!isset($result['client']) || is_null($result['client']) ? '' : $result['client']);
        $this->setAppendix(!isset($result['appendix']) || is_null($result['appendix']) ? '' : $result['appendix']);
        $this->setModuleIdentifier($moduleId);
        $this->setModuleType(!isset($result['module_type']) || is_null($result['module_type']) ? '' : $result['module_type']);

        if ($this->getModuleIdentifier() !== '' && $this->getModuleIdentifier() !== '0') {
            $module_path = strstr(
                !isset($result['module_path']) || is_null($result['module_path']) ? '' : $result['module_path'],
                $this->getModuleIdentifier(),
                true
            );
            $module_path = '.' . ($module_path === false ? '' : $module_path);
        } else {
            $module_path = ('.' . (!isset($result['module_path']) || is_null($result['module_path']) ? '' : $result['module_path']));
        }

        $this->setModulePath($module_path);
        $this->setInSecFolder(isset($result['sec']) && $result['sec'] === 'sec/');
        $this->setPathWithoutQuery(
            '.' . (!isset($result['path_without_query']) || is_null($result['path_without_query']) ? '' : $result['path_without_query'])
        );
        $this->setPath('.' . (!isset($result['path']) || is_null($result['path']) ? '' : $result['path']));
        $this->setSecurePath(
            '.' . (!isset($result['secure_path_id']) || is_null($result['secure_path_id']) ? '' : $result['secure_path_id'])
        );
        $this->setSecurePathId(!isset($result['module_type']) || is_null($result['module_type']) ? '' : $result['module_type']);
        // Pathinfo
        $parts = parse_url($path);
        $this->setFileName(basename($parts['path']));
        if (isset($parts['query'])) {
            $parts_query = $parts['query'];
            $this->setQuery($parts_query);
            parse_str($parts_query, $query);
            $this->setParameters($query);
        }
        $this->setSuffix(pathinfo($parts['path'], PATHINFO_EXTENSION));
        $this->handleParameters();
    }

    protected function handleParameters(): void
    {
        $param = $this->getParameters();
        if (isset($param[ilWACSignedPath::WAC_TOKEN_ID])) {
            $this->setToken($param[ilWACSignedPath::WAC_TOKEN_ID]);
        }
        if (isset($param[ilWACSignedPath::WAC_TIMESTAMP_ID])) {
            $this->setTimestamp((int) $param[ilWACSignedPath::WAC_TIMESTAMP_ID]);
        }
        if (isset($param[ilWACSignedPath::WAC_TTL_ID])) {
            $this->setTTL((int) $param[ilWACSignedPath::WAC_TTL_ID]);
        }
    }

    public function getParameters(): array
    {
        return $this->parameters;
    }

    public function setParameters(array $parameters): void
    {
        $this->parameters = $parameters;
    }

    public static function getAudioSuffixes(): array
    {
        return self::$audio_suffixes;
    }

    public static function setAudioSuffixes(array $audio_suffixes): void
    {
        self::$audio_suffixes = $audio_suffixes;
    }

    public static function getImageSuffixes(): array
    {
        return self::$image_suffixes;
    }

    public static function setImageSuffixes(array $image_suffixes): void
    {
        self::$image_suffixes = $image_suffixes;
    }

    public static function getVideoSuffixes(): array
    {
        return self::$video_suffixes;
    }

    public static function setVideoSuffixes(array $video_suffixes): void
    {
        self::$video_suffixes = $video_suffixes;
    }

    protected function normalizePath(string $path): string
    {
        $path = ltrim($path, '.');
        $path = rawurldecode($path);

        // cut everything before "data/" (for installations using a subdirectory)
        $path = strstr($path, '/' . self::DIR_DATA . '/') ?: $path;
        $path = ltrim($path, '/');

        $original_path = parse_url($path, PHP_URL_PATH);
        $query = parse_url($path, PHP_URL_QUERY);

        $real_data_dir = realpath("./" . self::DIR_DATA);
        $realpath = realpath("./" . $original_path);

        if (!str_starts_with($realpath, $real_data_dir)) {
            throw new ilWACException(ilWACException::NOT_FOUND, "Path is not in data directory");
        }

        $normalized_path = ltrim(
            str_replace(
                $real_data_dir,
                '',
                $realpath
            ),
            '/'
        );

        return "/" . self::DIR_DATA . '/' . $normalized_path . (empty($query) ? '' : '?' . $query);
    }

    public function getPrefix(): string
    {
        return $this->prefix;
    }

    public function setPrefix(string $prefix): void
    {
        $this->prefix = $prefix;
    }

    public function getAppendix(): string
    {
        return $this->appendix;
    }

    public function setAppendix(string $appendix): void
    {
        $this->appendix = $appendix;
    }

    public function getModulePath(): string
    {
        return $this->module_path;
    }

    public function setModulePath(string $module_path): void
    {
        $this->module_path = $module_path;
    }

    public function getDirName(): string
    {
        return dirname($this->getPathWithoutQuery());
    }

    public function getPathWithoutQuery(): string
    {
        return $this->path_without_query;
    }

    public function setPathWithoutQuery(string $path_without_query): void
    {
        $this->path_without_query = $path_without_query;
    }

    public function isImage(): bool
    {
        return in_array(strtolower($this->getSuffix()), self::$image_suffixes);
    }

    public function getSuffix(): string
    {
        return $this->suffix;
    }

    public function setSuffix(string $suffix): void
    {
        $this->suffix = $suffix;
    }

    public function isStreamable(): bool
    {
        if ($this->isAudio()) {
            return true;
        }
        return $this->isVideo();
    }

    public function isAudio(): bool
    {
        return in_array(strtolower($this->getSuffix()), self::$audio_suffixes);
    }

    public function isVideo(): bool
    {
        return in_array(strtolower($this->getSuffix()), self::$video_suffixes);
    }

    public function fileExists(): bool
    {
        return is_file($this->getPathWithoutQuery());
    }

    public function hasToken(): bool
    {
        return ($this->token !== '');
    }

    public function hasTimestamp(): bool
    {
        return ($this->timestamp !== 0);
    }

    public function hasTTL(): bool
    {
        return ($this->ttl !== 0);
    }

    public function getToken(): string
    {
        return $this->token;
    }

    public function setToken(string $token): void
    {
        $this->parameters[ilWACSignedPath::WAC_TOKEN_ID] = $token;
        $this->token = $token;
    }

    public function getTimestamp(): int
    {
        return $this->timestamp;
    }

    public function setTimestamp(int $timestamp): void
    {
        $this->parameters[ilWACSignedPath::WAC_TIMESTAMP_ID] = $timestamp;
        $this->timestamp = $timestamp;
    }

    public function getTTL(): int
    {
        return $this->ttl;
    }

    public function setTTL(int $ttl): void
    {
        $this->parameters[ilWACSignedPath::WAC_TTL_ID] = $ttl;
        $this->ttl = $ttl;
    }

    public function getClient(): string
    {
        return $this->client;
    }

    public function setClient(string $client): void
    {
        $this->client = $client;
    }

    public function getSecurePathId(): string
    {
        return $this->secure_path_id;
    }

    public function setSecurePathId(string $secure_path_id): void
    {
        $this->secure_path_id = $secure_path_id;
    }

    public function getPath(): string
    {
        return $this->path;
    }

    public function getCleanURLdecodedPath(): string
    {
        $string = $this->getPathWithoutQuery();
        return rawurldecode($string);
    }

    public function setPath(string $path): void
    {
        $this->path = $path;
    }

    public function getQuery(): string
    {
        return $this->query;
    }

    public function setQuery(string $query): void
    {
        $this->query = $query;
    }

    public function getFileName(): string
    {
        return $this->file_name;
    }

    public function setFileName(string $file_name): void
    {
        $this->file_name = $file_name;
    }

    public function getOriginalRequest(): string
    {
        return $this->original_request;
    }

    public function setOriginalRequest(string $original_request): void
    {
        $this->original_request = $original_request;
    }

    public function getSecurePath(): string
    {
        return $this->secure_path;
    }

    public function setSecurePath(string $secure_path): void
    {
        $this->secure_path = $secure_path;
    }

    public function isInSecFolder(): bool
    {
        return $this->in_sec_folder;
    }

    public function setInSecFolder(bool $in_sec_folder): void
    {
        $this->in_sec_folder = $in_sec_folder;
    }

    public function getModuleType(): string
    {
        return $this->module_type;
    }

    public function setModuleType(string $module_type): void
    {
        $this->module_type = $module_type;
    }

    public function getModuleIdentifier(): string
    {
        return $this->module_identifier;
    }

    public function setModuleIdentifier(string $module_identifier): void
    {
        $this->module_identifier = $module_identifier;
    }
}