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Diffstat (limited to 'admin/survey/minify/lib/Minify.php')
| -rw-r--r-- | admin/survey/minify/lib/Minify.php | 758 |
1 files changed, 758 insertions, 0 deletions
diff --git a/admin/survey/minify/lib/Minify.php b/admin/survey/minify/lib/Minify.php new file mode 100644 index 0000000..b01a2b9 --- /dev/null +++ b/admin/survey/minify/lib/Minify.php @@ -0,0 +1,758 @@ +<?php
+/**
+ * Class Minify
+ * @package Minify
+ */
+
+use Psr\Log\LoggerInterface;
+
+/**
+ * Minify - Combines, minifies, and caches JavaScript and CSS files on demand.
+ *
+ * See README for usage instructions (for now).
+ *
+ * This library was inspired by {@link mailto:flashkot@mail.ru jscsscomp by Maxim Martynyuk}
+ * and by the article {@link http://www.hunlock.com/blogs/Supercharged_Javascript "Supercharged JavaScript" by Patrick Hunlock}.
+ *
+ * @package Minify
+ * @author Ryan Grove <ryan@wonko.com>
+ * @author Stephen Clay <steve@mrclay.org>
+ * @copyright 2008 Ryan Grove, Stephen Clay. All rights reserved.
+ * @license http://opensource.org/licenses/bsd-license.php New BSD License
+ * @link https://github.com/mrclay/minify
+ */
+class Minify
+{
+
+ /**
+ * API version
+ *
+ * This is only bumped when API breaks are done and should follow the major version of the library
+ *
+ * @var int
+ */
+ const VERSION = 3;
+
+ const TYPE_CSS = 'text/css';
+ const TYPE_HTML = 'text/html';
+ // there is some debate over the ideal JS Content-Type, but this is the
+ // Apache default and what Yahoo! uses..
+ const TYPE_JS = 'application/x-javascript';
+ const URL_DEBUG = 'https://github.com/mrclay/minify/blob/master/docs/Debugging.wiki.md';
+
+ /**
+ * Any Minify_Cache_* object or null (i.e. no server cache is used)
+ *
+ * @var Minify_CacheInterface
+ */
+ private $cache;
+
+ /**
+ * Active controller for current request
+ *
+ * @var Minify_Controller_Base
+ */
+ protected $controller;
+
+ /**
+ * @var Minify_Env
+ */
+ protected $env;
+
+ /**
+ * @var Minify_SourceInterface[]
+ */
+ protected $sources;
+
+ /**
+ * @var string
+ */
+ protected $selectionId;
+
+ /**
+ * Options for current request
+ *
+ * @var array
+ */
+ protected $options;
+
+ /**
+ * @var LoggerInterface|null
+ */
+ protected $logger;
+
+ /**
+ * @param Minify_CacheInterface $cache
+ * @param LoggerInterface $logger
+ */
+ public function __construct(Minify_CacheInterface $cache, LoggerInterface $logger = null)
+ {
+ $this->cache = $cache;
+ $this->logger = $logger;
+ }
+
+ /**
+ * Get default Minify options.
+ *
+ * @return array options for Minify
+ */
+ public function getDefaultOptions()
+ {
+ return array(
+ 'isPublic' => true,
+ 'encodeOutput' => function_exists('gzdeflate'),
+ 'encodeMethod' => null, // determine later
+ 'encodeLevel' => 9,
+
+ 'minifiers' => array(
+ Minify::TYPE_JS => array('JSMin\\JSMin', 'minify'),
+ Minify::TYPE_CSS => array('Minify_CSSmin', 'minify'),
+ Minify::TYPE_HTML => array('Minify_HTML', 'minify'),
+ ),
+ 'minifierOptions' => array(), // no minifier options
+
+ 'contentTypeCharset' => 'utf-8',
+ 'maxAge' => 1800, // 30 minutes
+ 'rewriteCssUris' => true,
+ 'bubbleCssImports' => false,
+ 'quiet' => false, // serve() will send headers and output
+ 'debug' => false,
+ 'concatOnly' => false,
+
+ // if you override these, the response codes MUST be directly after
+ // the first space.
+ 'badRequestHeader' => 'HTTP/1.0 400 Bad Request',
+ 'errorHeader' => 'HTTP/1.0 500 Internal Server Error',
+
+ // callback function to see/modify content of all sources
+ 'postprocessor' => null,
+ // file to require to load preprocessor
+ 'postprocessorRequire' => null,
+
+ /**
+ * If this string is not empty AND the serve() option 'bubbleCssImports' is
+ * NOT set, then serve() will check CSS files for @import declarations that
+ * appear too late in the combined stylesheet. If found, serve() will prepend
+ * the output with this warning.
+ */
+ 'importWarning' => "/* See https://github.com/mrclay/minify/blob/master/docs/CommonProblems.wiki.md#imports-can-appear-in-invalid-locations-in-combined-css-files */\n"
+ );
+ }
+
+ /**
+ * Serve a request for a minified file.
+ *
+ * Here are the available options and defaults:
+ *
+ * 'isPublic' : send "public" instead of "private" in Cache-Control
+ * headers, allowing shared caches to cache the output. (default true)
+ *
+ * 'quiet' : set to true to have serve() return an array rather than sending
+ * any headers/output (default false)
+ *
+ * 'encodeOutput' : set to false to disable content encoding, and not send
+ * the Vary header (default true)
+ *
+ * 'encodeMethod' : generally you should let this be determined by
+ * HTTP_Encoder (leave null), but you can force a particular encoding
+ * to be returned, by setting this to 'gzip' or '' (no encoding)
+ *
+ * 'encodeLevel' : level of encoding compression (0 to 9, default 9)
+ *
+ * 'contentTypeCharset' : appended to the Content-Type header sent. Set to a falsey
+ * value to remove. (default 'utf-8')
+ *
+ * 'maxAge' : set this to the number of seconds the client should use its cache
+ * before revalidating with the server. This sets Cache-Control: max-age and the
+ * Expires header. Unlike the old 'setExpires' setting, this setting will NOT
+ * prevent conditional GETs. Note this has nothing to do with server-side caching.
+ *
+ * 'rewriteCssUris' : If true, serve() will automatically set the 'currentDir'
+ * minifier option to enable URI rewriting in CSS files (default true)
+ *
+ * 'bubbleCssImports' : If true, all @import declarations in combined CSS
+ * files will be move to the top. Note this may alter effective CSS values
+ * due to a change in order. (default false)
+ *
+ * 'debug' : set to true to minify all sources with the 'Lines' controller, which
+ * eases the debugging of combined files. This also prevents 304 responses.
+ * @see Minify_Lines::minify()
+ *
+ * 'concatOnly' : set to true to disable minification and simply concatenate the files.
+ * For JS, no minifier will be used. For CSS, only URI rewriting is still performed.
+ *
+ * 'minifiers' : to override Minify's default choice of minifier function for
+ * a particular content-type, specify your callback under the key of the
+ * content-type:
+ * <code>
+ * // call customCssMinifier($css) for all CSS minification
+ * $options['minifiers'][Minify::TYPE_CSS] = 'customCssMinifier';
+ *
+ * // don't minify Javascript at all
+ * $options['minifiers'][Minify::TYPE_JS] = 'Minify::nullMinifier';
+ * </code>
+ *
+ * 'minifierOptions' : to send options to the minifier function, specify your options
+ * under the key of the content-type. E.g. To send the CSS minifier an option:
+ * <code>
+ * // give CSS minifier array('optionName' => 'optionValue') as 2nd argument
+ * $options['minifierOptions'][Minify::TYPE_CSS]['optionName'] = 'optionValue';
+ * </code>
+ *
+ * 'contentType' : (optional) this is only needed if your file extension is not
+ * js/css/html. The given content-type will be sent regardless of source file
+ * extension, so this should not be used in a Groups config with other
+ * Javascript/CSS files.
+ *
+ * 'importWarning' : serve() will check CSS files for @import declarations that
+ * appear too late in the combined stylesheet. If found, serve() will prepend
+ * the output with this warning. To disable this, set this option to empty string.
+ *
+ * Any controller options are documented in that controller's createConfiguration() method.
+ *
+ * @param Minify_ControllerInterface $controller instance of subclass of Minify_Controller_Base
+ *
+ * @param array $options controller/serve options
+ *
+ * @return null|array if the 'quiet' option is set to true, an array
+ * with keys "success" (bool), "statusCode" (int), "content" (string), and
+ * "headers" (array).
+ *
+ * @throws Exception
+ */
+ public function serve(Minify_ControllerInterface $controller, $options = array())
+ {
+ $this->env = $controller->getEnv();
+
+ $options = array_merge($this->getDefaultOptions(), $options);
+
+ $config = $controller->createConfiguration($options);
+
+ $this->sources = $config->getSources();
+ $this->selectionId = $config->getSelectionId();
+ $this->options = $this->analyzeSources($config->getOptions());
+
+ if (!$this->options['quiet'] && !headers_sent()) {
+ ini_set('zlib.output_compression', '0');
+ }
+
+ // check request validity
+ if (!$this->sources) {
+ // invalid request!
+ if (! $this->options['quiet']) {
+ $this->errorExit($this->options['badRequestHeader'], self::URL_DEBUG);
+ } else {
+ list(,$statusCode) = explode(' ', $this->options['badRequestHeader']);
+
+ return array(
+ 'success' => false,
+ 'statusCode' => (int)$statusCode,
+ 'content' => '',
+ 'headers' => array(),
+ );
+ }
+ }
+
+ $this->controller = $controller;
+
+ if ($this->options['debug']) {
+ $this->setupDebug();
+ $this->options['maxAge'] = 0;
+ }
+
+ // determine encoding
+ if ($this->options['encodeOutput']) {
+ $sendVary = true;
+ if ($this->options['encodeMethod'] !== null) {
+ // controller specifically requested this
+ $contentEncoding = $this->options['encodeMethod'];
+ } else {
+ // sniff request header
+ // depending on what the client accepts, $contentEncoding may be
+ // 'x-gzip' while our internal encodeMethod is 'gzip'. Calling
+ // getAcceptedEncoding(false, false) leaves out compress and deflate as options.
+ $list = HTTP_Encoder::getAcceptedEncoding(false, false);
+ list($this->options['encodeMethod'], $contentEncoding) = $list;
+ $sendVary = ! HTTP_Encoder::isBuggyIe();
+ }
+ } else {
+ $this->options['encodeMethod'] = ''; // identity (no encoding)
+ }
+
+ // check client cache
+ $cgOptions = array(
+ 'lastModifiedTime' => $this->options['lastModifiedTime'],
+ 'isPublic' => $this->options['isPublic'],
+ 'encoding' => $this->options['encodeMethod'],
+ );
+
+ if ($this->options['maxAge'] > 0) {
+ $cgOptions['maxAge'] = $this->options['maxAge'];
+ } elseif ($this->options['debug']) {
+ $cgOptions['invalidate'] = true;
+ }
+
+ $cg = new HTTP_ConditionalGet($cgOptions);
+ if ($cg->cacheIsValid) {
+ // client's cache is valid
+ if (! $this->options['quiet']) {
+ $cg->sendHeaders();
+
+ return;
+ }
+
+ return array(
+ 'success' => true,
+ 'statusCode' => 304,
+ 'content' => '',
+ 'headers' => $cg->getHeaders(),
+ );
+ }
+
+ // client will need output
+ $headers = $cg->getHeaders();
+ unset($cg);
+
+ if ($this->options['contentType'] === self::TYPE_CSS && $this->options['rewriteCssUris']) {
+ $this->setupUriRewrites();
+ }
+
+ if ($this->options['concatOnly']) {
+ $this->options['minifiers'][self::TYPE_JS] = false;
+ foreach ($this->sources as $key => $source) {
+ if ($this->options['contentType'] === self::TYPE_JS) {
+ $source->setMinifier('Minify::nullMinifier');
+ } elseif ($this->options['contentType'] === self::TYPE_CSS) {
+ $source->setMinifier(array('Minify_CSSmin', 'minify'));
+ $sourceOpts = $source->getMinifierOptions();
+ $sourceOpts['compress'] = false;
+ $source->setMinifierOptions($sourceOpts);
+ }
+ }
+ }
+
+ // check server cache
+ if (! $this->options['debug']) {
+ // using cache
+ // the goal is to use only the cache methods to sniff the length and
+ // output the content, as they do not require ever loading the file into
+ // memory.
+ $cacheId = $this->_getCacheId();
+ $fullCacheId = ($this->options['encodeMethod']) ? $cacheId . '.gz' : $cacheId;
+
+ // check cache for valid entry
+ $cacheIsReady = $this->cache->isValid($fullCacheId, $this->options['lastModifiedTime']);
+ if ($cacheIsReady) {
+ $cacheContentLength = $this->cache->getSize($fullCacheId);
+ } else {
+ // generate & cache content
+ try {
+ $content = $this->combineMinify();
+ } catch (Exception $e) {
+ $this->logger && $this->logger->critical($e->getMessage());
+ if (! $this->options['quiet']) {
+ $this->errorExit($this->options['errorHeader'], self::URL_DEBUG);
+ }
+ throw $e;
+ }
+ $this->cache->store($cacheId, $content);
+ if (function_exists('gzencode') && $this->options['encodeMethod']) {
+ $this->cache->store($cacheId . '.gz', gzencode($content, $this->options['encodeLevel']));
+ }
+ }
+ } else {
+ // no cache
+ $cacheIsReady = false;
+ try {
+ $content = $this->combineMinify();
+ } catch (Exception $e) {
+ $this->logger && $this->logger->critical($e->getMessage());
+ if (! $this->options['quiet']) {
+ $this->errorExit($this->options['errorHeader'], self::URL_DEBUG);
+ }
+ throw $e;
+ }
+ }
+ if (! $cacheIsReady && $this->options['encodeMethod']) {
+ // still need to encode
+ $content = gzencode($content, $this->options['encodeLevel']);
+ }
+
+ // add headers
+ if ($cacheIsReady) {
+ $headers['Content-Length'] = $cacheContentLength;
+ } else {
+ if (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2)) {
+ $headers['Content-Length'] = mb_strlen($content, '8bit');
+ } else {
+ $headers['Content-Length'] = strlen($content);
+ }
+ }
+
+ $headers['Content-Type'] = $this->options['contentType'];
+ if ($this->options['contentTypeCharset']) {
+ $headers['Content-Type'] .= '; charset=' . $this->options['contentTypeCharset'];
+ }
+
+ if ($this->options['encodeMethod'] !== '') {
+ $headers['Content-Encoding'] = $contentEncoding;
+ }
+ if ($this->options['encodeOutput'] && $sendVary) {
+ $headers['Vary'] = 'Accept-Encoding';
+ }
+
+ if (! $this->options['quiet']) {
+ // output headers & content
+ foreach ($headers as $name => $val) {
+ header($name . ': ' . $val);
+ }
+ if ($cacheIsReady) {
+ $this->cache->display($fullCacheId);
+ } else {
+ echo $content;
+ }
+ } else {
+ return array(
+ 'success' => true,
+ 'statusCode' => 200,
+ 'content' => $cacheIsReady ? $this->cache->fetch($fullCacheId) : $content,
+ 'headers' => $headers,
+ );
+ }
+ }
+
+ /**
+ * Return combined minified content for a set of sources
+ *
+ * No internal caching will be used and the content will not be HTTP encoded.
+ *
+ * @param array $sources array of filepaths and/or Minify_Source objects
+ *
+ * @param array $options (optional) array of options for serve.
+ *
+ * @return string
+ */
+ public function combine($sources, $options = array())
+ {
+ $tmpCache = $this->cache;
+ $this->cache = new Minify_Cache_Null();
+
+ $env = new Minify_Env();
+ $sourceFactory = new Minify_Source_Factory($env, array(
+ 'checkAllowDirs' => false,
+ ), $this->cache);
+ $controller = new Minify_Controller_Files($env, $sourceFactory, $this->logger);
+
+ $options = array_merge($options, array(
+ 'files' => (array)$sources,
+ 'quiet' => true,
+ 'encodeMethod' => '',
+ 'lastModifiedTime' => 0,
+ ));
+ $out = $this->serve($controller, $options);
+
+ $this->cache = $tmpCache;
+
+ return $out['content'];
+ }
+
+ /**
+ * Show an error page
+ *
+ * @param string $header Full header. E.g. 'HTTP/1.0 500 Internal Server Error'
+ * @param string $url URL to direct the user to
+ * @param string $msgHtml HTML message for the client
+ *
+ * @return void
+ * @internal This is not part of the public API and is subject to change
+ * @access private
+ */
+ public function errorExit($header, $url = '', $msgHtml = '')
+ {
+ $url = htmlspecialchars($url, ENT_QUOTES);
+ list(,$h1) = explode(' ', $header, 2);
+ $h1 = htmlspecialchars($h1);
+ // FastCGI environments require 3rd arg to header() to be set
+ list(, $code) = explode(' ', $header, 3);
+ header($header, true, $code);
+ header('Content-Type: text/html; charset=utf-8');
+ echo "<h1>$h1</h1>";
+ if ($msgHtml) {
+ echo $msgHtml;
+ }
+ if ($url) {
+ echo "<p>Please see <a href='$url'>$url</a>.</p>";
+ }
+ exit;
+ }
+
+ /**
+ * Default minifier for .min or -min JS files.
+ *
+ * @param string $content
+ * @return string
+ */
+ public static function nullMinifier($content)
+ {
+ if (isset($content[0]) && $content[0] === "\xef") {
+ $content = substr($content, 3);
+ }
+ $content = str_replace("\r\n", "\n", $content);
+
+ return trim($content);
+ }
+
+ /**
+ * Setup CSS sources for URI rewriting
+ */
+ protected function setupUriRewrites()
+ {
+ foreach ($this->sources as $key => $source) {
+ $file = $this->env->normalizePath($source->getFilePath());
+ $minifyOptions = $source->getMinifierOptions();
+
+ if ($file
+ && !isset($minifyOptions['currentDir'])
+ && !isset($minifyOptions['prependRelativePath'])) {
+ $minifyOptions['currentDir'] = dirname($file);
+ $source->setMinifierOptions($minifyOptions);
+ }
+ }
+ }
+
+ /**
+ * Set up sources to use Minify_Lines
+ */
+ protected function setupDebug()
+ {
+ foreach ($this->sources as $source) {
+ $source->setMinifier(array('Minify_Lines', 'minify'));
+ $id = $source->getId();
+ $source->setMinifierOptions(array(
+ 'id' => (is_file($id) ? basename($id) : $id),
+ ));
+ }
+ }
+
+ /**
+ * Combines sources and minifies the result.
+ *
+ * @return string
+ *
+ * @throws Exception
+ */
+ protected function combineMinify()
+ {
+ $type = $this->options['contentType']; // ease readability
+
+ // when combining scripts, make sure all statements separated and
+ // trailing single line comment is terminated
+ $implodeSeparator = ($type === self::TYPE_JS) ? "\n;" : '';
+
+ // allow the user to pass a particular array of options to each
+ // minifier (designated by type). source objects may still override
+ // these
+ if (isset($this->options['minifierOptions'][$type])) {
+ $defaultOptions = $this->options['minifierOptions'][$type];
+ } else {
+ $defaultOptions = array();
+ }
+
+ // if minifier not set, default is no minification. source objects
+ // may still override this
+ if (isset($this->options['minifiers'][$type])) {
+ $defaultMinifier = $this->options['minifiers'][$type];
+ } else {
+ $defaultMinifier = false;
+ }
+
+ // process groups of sources with identical minifiers/options
+ $content = array();
+ $i = 0;
+ $l = count($this->sources);
+ $groupToProcessTogether = array();
+ $lastMinifier = null;
+ $lastOptions = null;
+ do {
+ // get next source
+ $source = null;
+ if ($i < $l) {
+ $source = $this->sources[$i];
+ $sourceContent = $source->getContent();
+
+ // allow the source to override our minifier and options
+ $minifier = $source->getMinifier();
+ if (!$minifier) {
+ $minifier = $defaultMinifier;
+ }
+ $options = array_merge($defaultOptions, $source->getMinifierOptions());
+ }
+ // do we need to process our group right now?
+ if ($i > 0 // yes, we have at least the first group populated
+ && (
+ ! $source // yes, we ran out of sources
+ || $type === self::TYPE_CSS // yes, to process CSS individually (avoiding PCRE bugs/limits)
+ || $minifier !== $lastMinifier // yes, minifier changed
+ || $options !== $lastOptions)) { // yes, options changed
+ // minify previous sources with last settings
+ $imploded = implode($implodeSeparator, $groupToProcessTogether);
+ $groupToProcessTogether = array();
+ if ($lastMinifier) {
+ try {
+ $content[] = call_user_func($lastMinifier, $imploded, $lastOptions);
+ } catch (Exception $e) {
+ throw new Exception("Exception in minifier: " . $e->getMessage());
+ }
+ } else {
+ $content[] = $imploded;
+ }
+ }
+ // add content to the group
+ if ($source) {
+ $groupToProcessTogether[] = $sourceContent;
+ $lastMinifier = $minifier;
+ $lastOptions = $options;
+ }
+ $i++;
+ } while ($source);
+
+ $content = implode($implodeSeparator, $content);
+
+ if ($type === self::TYPE_CSS && false !== strpos($content, '@import')) {
+ $content = $this->handleCssImports($content);
+ }
+
+ // do any post-processing (esp. for editing build URIs)
+ if ($this->options['postprocessorRequire']) {
+ require_once $this->options['postprocessorRequire'];
+ }
+ if ($this->options['postprocessor']) {
+ $content = call_user_func($this->options['postprocessor'], $content, $type);
+ }
+
+ return $content;
+ }
+
+ /**
+ * Make a unique cache id for for this request.
+ *
+ * Any settings that could affect output are taken into consideration
+ *
+ * @param string $prefix
+ *
+ * @return string
+ */
+ protected function _getCacheId($prefix = 'minify')
+ {
+ $name = preg_replace('/[^a-zA-Z0-9\\.=_,]/', '', $this->selectionId);
+ $name = preg_replace('/\\.+/', '.', $name);
+ $name = substr($name, 0, 100 - 34 - strlen($prefix));
+ $md5 = md5(serialize(array(
+ Minify_SourceSet::getDigest($this->sources),
+ $this->options['minifiers'],
+ $this->options['minifierOptions'],
+ $this->options['postprocessor'],
+ $this->options['bubbleCssImports'],
+ Minify::VERSION,
+ )));
+
+ return "{$prefix}_{$name}_{$md5}";
+ }
+
+ /**
+ * Bubble CSS @imports to the top or prepend a warning if an import is detected not at the top.
+ *
+ * @param string $css
+ *
+ * @return string
+ */
+ protected function handleCssImports($css)
+ {
+ if ($this->options['bubbleCssImports']) {
+ // bubble CSS imports
+ preg_match_all('/@import.*?;/', $css, $imports);
+ $css = implode('', $imports[0]) . preg_replace('/@import.*?;/', '', $css);
+
+ return $css;
+ }
+
+ if ('' === $this->options['importWarning']) {
+ return $css;
+ }
+
+ // remove comments so we don't mistake { in a comment as a block
+ $noCommentCss = preg_replace('@/\\*[\\s\\S]*?\\*/@', '', $css);
+ $lastImportPos = strrpos($noCommentCss, '@import');
+ $firstBlockPos = strpos($noCommentCss, '{');
+ if (false !== $lastImportPos
+ && false !== $firstBlockPos
+ && $firstBlockPos < $lastImportPos
+ ) {
+ // { appears before @import : prepend warning
+ $css = $this->options['importWarning'] . $css;
+ }
+
+ return $css;
+ }
+
+ /**
+ * Analyze sources (if there are any) and set $options 'contentType'
+ * and 'lastModifiedTime' if they already aren't.
+ *
+ * @param array $options options for Minify
+ *
+ * @return array options for Minify
+ */
+ protected function analyzeSources($options = array())
+ {
+ if (!$this->sources) {
+ return $options;
+ }
+
+ $type = null;
+ foreach ($this->sources as $source) {
+ $sourceType = $source->getContentType();
+
+ if (!empty($options['contentType'])) {
+ // just verify sources have null content type or match the options
+ if ($sourceType !== null && $sourceType !== $options['contentType']) {
+ $this->logger && $this->logger->warning("ContentType mismatch: '{$sourceType}' != '{$options['contentType']}'");
+
+ $this->sources = array();
+
+ return $options;
+ }
+
+ continue;
+ }
+
+ if ($type === null) {
+ $type = $sourceType;
+ } elseif ($sourceType !== $type) {
+ $this->logger && $this->logger->warning("ContentType mismatch: '{$sourceType}' != '{$type}'");
+
+ $this->sources = array();
+
+ return $options;
+ }
+ }
+
+ if (empty($options['contentType'])) {
+ if (null === $type) {
+ $type = 'text/plain';
+ }
+ $options['contentType'] = $type;
+ }
+
+ // last modified is needed for caching, even if setExpires is set
+ if (!isset($options['lastModifiedTime'])) {
+ $max = 0;
+ foreach ($this->sources as $source) {
+ $max = max($source->getLastModified(), $max);
+ }
+ $options['lastModifiedTime'] = $max;
+ }
+
+ return $options;
+ }
+}
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