diff options
Diffstat (limited to 'library/Icinga/Web/JavaScript.php')
| -rw-r--r-- | library/Icinga/Web/JavaScript.php | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/library/Icinga/Web/JavaScript.php b/library/Icinga/Web/JavaScript.php new file mode 100644 index 0000000..9a6a11b --- /dev/null +++ b/library/Icinga/Web/JavaScript.php @@ -0,0 +1,269 @@ +<?php +/* Icinga Web 2 | (c) 2014 Icinga Development Team | GPLv2+ */ + +namespace Icinga\Web; + +use Icinga\Application\Icinga; +use Icinga\Application\Logger; +use Icinga\Exception\Json\JsonDecodeException; +use Icinga\Util\Json; +use JShrink\Minifier; + +class JavaScript +{ + /** @var string */ + const DEFINE_RE = + '/(?<!\.)define\(\s*([\'"][^\'"]*[\'"])?[,\s]*(\[[^]]*\])?[,\s]*((?>function\s*\([^)]*\)|[^=]*=>|\w+).*)/'; + + protected static $jsFiles = [ + 'js/helpers.js', + 'js/icinga.js', + 'js/icinga/logger.js', + 'js/icinga/storage.js', + 'js/icinga/utils.js', + 'js/icinga/ui.js', + 'js/icinga/timer.js', + 'js/icinga/loader.js', + 'js/icinga/eventlistener.js', + 'js/icinga/events.js', + 'js/icinga/history.js', + 'js/icinga/module.js', + 'js/icinga/timezone.js', + 'js/icinga/behavior/application-state.js', + 'js/icinga/behavior/autofocus.js', + 'js/icinga/behavior/collapsible.js', + 'js/icinga/behavior/detach.js', + 'js/icinga/behavior/dropdown.js', + 'js/icinga/behavior/navigation.js', + 'js/icinga/behavior/form.js', + 'js/icinga/behavior/actiontable.js', + 'js/icinga/behavior/flyover.js', + 'js/icinga/behavior/filtereditor.js', + 'js/icinga/behavior/selectable.js', + 'js/icinga/behavior/modal.js', + 'js/icinga/behavior/input-enrichment.js', + 'js/icinga/behavior/datetime-picker.js' + ]; + + protected static $vendorFiles = []; + + protected static $baseFiles = [ + 'js/define.js' + ]; + + public static function sendMinified() + { + self::send(true); + } + + /** + * Send the client side script code to the client + * + * Does not cache the client side script code if the HTTP header Cache-Control or Pragma is set to no-cache. + * + * @param bool $minified Whether to compress the client side script code + */ + public static function send($minified = false) + { + header('Content-Type: application/javascript'); + $basedir = Icinga::app()->getBootstrapDirectory(); + $moduleManager = Icinga::app()->getModuleManager(); + + $files = []; + $js = $out = ''; + $min = $minified ? '.min' : ''; + + // Prepare vendor file list + $vendorFiles = []; + foreach (self::$vendorFiles as $file) { + $filePath = $basedir . '/' . $file . $min . '.js'; + $vendorFiles[] = $filePath; + $files[] = $filePath; + } + + // Prepare base file list + $baseFiles = []; + foreach (self::$baseFiles as $file) { + $filePath = $basedir . '/' . $file; + $baseFiles[] = $filePath; + $files[] = $filePath; + } + + // Prepare library file list + foreach (Icinga::app()->getLibraries() as $library) { + $files = array_merge($files, $library->getJsAssets()); + } + + // Prepare core file list + $coreFiles = []; + foreach (self::$jsFiles as $file) { + $filePath = $basedir . '/' . $file; + $coreFiles[] = $filePath; + $files[] = $filePath; + } + + $moduleFiles = []; + foreach ($moduleManager->getLoadedModules() as $name => $module) { + if ($module->hasJs()) { + $jsDir = $module->getJsDir(); + foreach ($module->getJsFiles() as $path) { + if (file_exists($path)) { + $moduleFiles[$name][$jsDir][] = $path; + $files[] = $path; + } + } + } + } + + $request = Icinga::app()->getRequest(); + $noCache = $request->getHeader('Cache-Control') === 'no-cache' || $request->getHeader('Pragma') === 'no-cache'; + + header('Cache-Control: public,no-cache,must-revalidate'); + + if (! $noCache && FileCache::etagMatchesFiles($files)) { + header("HTTP/1.1 304 Not Modified"); + return; + } else { + $etag = FileCache::etagForFiles($files); + } + + header('ETag: "' . $etag . '"'); + header('Content-Type: application/javascript'); + + $cacheFile = 'icinga-' . $etag . $min . '.js'; + $cache = FileCache::instance(); + if (! $noCache && $cache->has($cacheFile)) { + $cache->send($cacheFile); + return; + } + + // We do not minify vendor files + foreach ($vendorFiles as $file) { + $out .= ';' . ltrim(trim(file_get_contents($file)), ';') . "\n"; + } + + $baseJs = ''; + foreach ($baseFiles as $file) { + $baseJs .= file_get_contents($file) . "\n\n\n"; + } + + // Library files need to be namespaced first before they can be included + foreach (Icinga::app()->getLibraries() as $library) { + foreach ($library->getJsAssets() as $file) { + $alreadyMinified = false; + if ($minified && file_exists(($minFile = substr($file, 0, -3) . '.min.js'))) { + $alreadyMinified = true; + $file = $minFile; + } + + $content = self::optimizeDefine( + file_get_contents($file), + $file, + $library->getJsAssetPath(), + $library->getName() + ); + + if ($alreadyMinified) { + $out .= ';' . ltrim(trim($content), ';') . "\n"; + } else { + $js .= $content . "\n\n\n"; + } + } + } + + foreach ($coreFiles as $file) { + $js .= file_get_contents($file) . "\n\n\n"; + } + + foreach ($moduleFiles as $name => $paths) { + foreach ($paths as $basePath => $filePaths) { + foreach ($filePaths as $file) { + $content = self::optimizeDefine(file_get_contents($file), $file, $basePath, $name); + if (substr($file, -7, 7) === '.min.js') { + $out .= ';' . ltrim(trim($content), ';') . "\n"; + } else { + $js .= $content . "\n\n\n"; + } + } + } + } + + if ($minified) { + require_once 'JShrink/Minifier.php'; + $out .= Minifier::minify($js, ['flaggedComments' => false]); + $baseOut = Minifier::minify($baseJs, ['flaggedComments' => false]); + $out = ';' . ltrim($baseOut, ';') . "\n" . $out; + } else { + $out = $baseJs . $out . $js; + } + + $cache->store($cacheFile, $out); + echo $out; + } + + /** + * Optimize define() calls in the given JS + * + * @param string $js + * @param string $filePath + * @param string $basePath + * @param string $packageName + * + * @return string + */ + public static function optimizeDefine($js, $filePath, $basePath, $packageName) + { + if (! preg_match(self::DEFINE_RE, $js, $match) || strpos($js, 'define.amd') !== false) { + return $js; + } + + try { + $assetName = $match[1] ? Json::decode($match[1]) : ''; + if (! $assetName) { + $assetName = explode('.', basename($filePath))[0]; + } + + $assetName = join(DIRECTORY_SEPARATOR, array_filter([ + $packageName, + ltrim(substr(dirname($filePath), strlen($basePath)), DIRECTORY_SEPARATOR), + $assetName + ])); + + $assetName = Json::encode($assetName, JSON_UNESCAPED_SLASHES); + } catch (JsonDecodeException $_) { + $assetName = $match[1]; + Logger::debug('Can\'t optimize name of "%s". Are single quotes used instead of double quotes?', $filePath); + } + + try { + $dependencies = $match[2] ? Json::decode($match[2]) : []; + foreach ($dependencies as &$dependencyName) { + if ($dependencyName === 'exports') { + // exports is a special keyword and doesn't need optimization + continue; + } + + if (preg_match('~^((?:\.\.?/)+)*(.*)~', $dependencyName, $natch)) { + $dependencyName = join(DIRECTORY_SEPARATOR, array_filter([ + $packageName, + ltrim(substr( + realpath(join(DIRECTORY_SEPARATOR, [dirname($filePath), $natch[1]])), + strlen(realpath($basePath)) + ), DIRECTORY_SEPARATOR), + $natch[2] + ])); + } + } + + $dependencies = Json::encode($dependencies, JSON_UNESCAPED_SLASHES); + } catch (JsonDecodeException $_) { + $dependencies = $match[2]; + Logger::debug( + 'Can\'t optimize dependencies of "%s". Are single quotes used instead of double quotes?', + $filePath + ); + } + + return str_replace($match[0], sprintf("define(%s, %s, %s", $assetName, $dependencies, $match[3]), $js); + } +} |