PageResponse.php

<?php
/**
 * This file is part of Jarves.
 *
 * (c) Marc J. Schmidt <marc@marcjschmidt.de>
 *
 *     J.A.R.V.E.S - Just A Rather Very Easy [content management] System.
 *
 *     http://jarves.io
 *
 * To get the full copyright and license information, please view the
 * LICENSE file, that was distributed with this source code.
 */

namespace Jarves;

use Jarves\AssetHandler\AssetInfo;
use Jarves\AssetHandler\Container;
use Jarves\AssetHandler\CssHandler;
use Jarves\AssetHandler\JsHandler;
use Jarves\Configuration\ThemeLayout;
use Jarves\Model\Content;
use Jarves\Model\ContentInterface;
use Jarves\Model\Node;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\HttpFoundation\ParameterBag;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Templating\EngineInterface;

/**
 * This is the response, we use to generate the basic html skeleton.
 */
class PageResponse extends Response
{
    /**
     * @var string
     */
    public $docType = 'JarvesBundle:Doctypes:html5.html.twig';

    /**
     * @var array
     */
    protected $parameters = [];

    /**
     * @var Jarves
     */
    protected $jarves;

    /**
     * @var StopwatchHelper
     */
    protected $stopwatch;

    /**
     * Use in <script and <link tags.
     *
     * @var string
     */
    protected $tagEndChar = '>';

    /**
     * @var string
     */
    protected $language = 'en';

    /**
     * All plugin responses. Mostly only one.
     *
     * @var array
     */
    protected $pluginResponse = [];

    /**
     * Asset files.
     *
     * @var array
     */
    protected $assets = [];

    /**
     * @var AssetInfo[][]
     */
    protected $assetsInfo = [];

    /**
     * @var AssetInfo[][]
     */
    protected $assetsInfoBottom = [];

    /**
     * @var string
     */
    protected $title;

    /**
     * All additional html>head elements.
     *
     * @var array
     */
    protected $header = array();

    /**
     * @var string|callable
     */
    protected $body = '';

    /**
     * @var bool
     */
    protected $renderFrontPage = true;

    /**
     * @var bool
     */
    protected $domainHandling = true;

    /**
     * Overwrites the page content from the database fo the current page.
     *
     * Contains a array map with contentId => Content[], or string
     *
     * @var null|array|string
     */
    protected $pageContent = null;

    /**
     * @var string
     */
    protected $favicon = '@JarvesBundle/admin/images/favicon.ico';

    /**
     * @var bool
     */
    protected $resourceCompression = false;

    /**
     * @var Container
     */
    private $assetCompilerContainer;
    /**
     * @var EventDispatcherInterface
     */
    private $eventDispatcher;

    /**
     * @var EngineInterface
     */
    private $templating;

    /**
     * @var EditMode
     */
    private $editMode;
    /**
     * @var PageStack
     */
    private $pageStack;

    /**
     * @param string $content
     * @param int $status
     * @param array $headers
     * @param PageStack $pageStack
     * @param Jarves $jarves
     * @param StopwatchHelper $stopwatch
     * @param Container $assetCompilerContainer
     * @param EventDispatcherInterface $eventDispatcher
     * @param EngineInterface $templating
     * @param EditMode $editMode
     */
    public function __construct($content = '', $status = 200, $headers = array(),
                                PageStack $pageStack, Jarves $jarves, StopwatchHelper $stopwatch, Container $assetCompilerContainer,
                                EventDispatcherInterface $eventDispatcher, EngineInterface $templating,
                                EditMode $editMode)
    {
        parent::__construct($content, $status, $headers);
        $this->jarves = $jarves;
        $this->stopwatch = $stopwatch;
        $this->assetCompilerContainer = $assetCompilerContainer;
        $this->eventDispatcher = $eventDispatcher;
        $this->templating = $templating;
        $this->editMode = $editMode;
        $this->pageStack = $pageStack;
    }

    /**
     *
     */
    public function reset()
    {
        $reflection = new \ReflectionClass($this);
        foreach ($reflection->getDefaultProperties() as $key => $defaultValue) {
            $this->$key = $defaultValue;
        }
    }

    /**
     * @param string $favicon
     */
    public function setFavicon($favicon)
    {
        $this->favicon = $favicon;
    }

    /**
     * @return string
     */
    public function getFavicon()
    {
        if ($this->getDomainHandling()) {
            if ($domain = $this->pageStack->getCurrentDomain()) {
                if ($domain->getFavicon()) {
                    return $domain->getFavicon();
                }
            }
        }

        return $this->favicon;
    }

    /**
     * @return array|null|string
     */
    public function getPageContent()
    {
        return $this->pageContent;
    }

    /**
     * @param array|null|string $pageContent
     */
    public function setPageContent($pageContent)
    {
        $this->pageContent = $pageContent;
    }

    /**
     * @param string $tagEndChar
     */
    public function setTagEndChar($tagEndChar)
    {
        $this->tagEndChar = $tagEndChar;
    }

    /**
     * @return string
     */
    public function getTagEndChar()
    {
        return $this->tagEndChar;
    }

    /**
     * @param boolean $domainHandling
     */
    public function setDomainHandling($domainHandling)
    {
        $this->domainHandling = $domainHandling;
    }

    /**
     * @return bool
     */
    public function getDomainHandling()
    {
        return $this->domainHandling;
    }

    /**
     * @param string|callable $body
     */
    public function setBody($body)
    {
        $this->body = $body;
    }

    /**
     * @return string|callable
     */
    public function getBody()
    {
        return $this->body;
    }

    /**
     * @param boolean $renderFrontPage
     */
    public function setRenderFrontPage($renderFrontPage)
    {
        $this->renderFrontPage = $renderFrontPage;
    }

    /**
     * @return boolean
     */
    public function getRenderFrontPage()
    {
        return $this->renderFrontPage;
    }

    /**
     * @param bool $resourceCompression
     */
    public function setResourceCompression($resourceCompression)
    {
        $this->resourceCompression = $resourceCompression;
    }

    /**
     * @return bool
     */
    public function getResourceCompression()
    {
        return $this->resourceCompression;
    }

    /**
     * Returns the current page of the pageStack.
     *
     * @return Node|null
     */
    public function getPage()
    {
        return $this->pageStack->getCurrentPage();
    }

    /**
     * Adds a css file to the page.
     *
     * @param string $path
     * @param string $contentType
     * @param int    $priority
     */
    public function loadAssetFile($path, $contentType = null, $priority = 0)
    {
        $this->injectAsset(array('path' => $path, 'contentType' => $contentType, 'priority' => $priority));
    }

    /**
     * @param array $definition
     */
    protected function injectAsset($definition)
    {
        $assetInfo = new AssetInfo();

        if (isset($definition['path'])) {
            $assetInfo->setPath($definition['path']);
            $assetInfo->setOriginalPath($definition['path']);
        }
        if (isset($definition['content'])) {
            $assetInfo->setContent($definition['content']);
        }
        if (isset($definition['contentType'])) {
            $assetInfo->setContentType($definition['contentType']);
        }

        if (isset($definition['priority'])) {
            $assetInfo->setPriority($definition['priority'] + 0);
        }

        foreach ($this->handleAsset($assetInfo) as $asset) {

            if (isset($definition['position']) && 'bottom' === strtolower($definition['position'])) {
                //instead of position use $asset->getPosition();

                if (!$this->hasAsset($asset, $this->assetsInfoBottom)) {
                    $this->assetsInfoBottom[$asset->getPriority()][] = $asset;
                }
            } else {
                if (!$this->hasAsset($asset)) {
                    $this->assetsInfo[$asset->getPriority()][] = $asset;
                }
            }
        }
    }

    /**
     * If needed the given asset gets compiled and $assetInfo will be modified.
     *
     * @param AssetInfo $assetInfo
     *
     * @return AssetInfo[]
     */
    public function handleAsset(&$assetInfo)
    {
        $assetHandlerContainer = $this->assetCompilerContainer;

        $compiler = $assetHandlerContainer->getCompileHandlerByContentType($assetInfo->getContentType());
        if (!$compiler) {
            $compiler = $assetHandlerContainer->getCompileHandlerByFileExtension($assetInfo->getPath());
        }

        if (!$compiler) {
            return [$assetInfo]; //no compiler found, so ok
        }

        if ($compiledAssetInfoResult = $compiler->compileFile($assetInfo)) {
            if (is_array($compiledAssetInfoResult)) {
                return $compiledAssetInfoResult;
            } else {
                $compiledAssetInfo = $compiledAssetInfoResult;
                if ($compiledAssetInfo instanceof AssetInfo) {
                    if ($this->hasAsset($compiledAssetInfo)) {
                        return []; //asset already in
                    }
                    $assetInfo = $compiledAssetInfo;
                }

                return [$assetInfo];
            }
        }

        return [];
    }

    public function hasAsset(AssetInfo $assetInfo, $assets = null)
    {
        if (!$assets) {
            $assets = $this->assetsInfo;
        }

        $assets = $assets ? call_user_func_array('array_merge', $assets) : [];

        foreach ($assets as $asset) {
            if (!$assetInfo->getPath() && $assetInfo->getContent() === $asset->getContent()
                && $assetInfo->getContentType() === $asset->getContentType()
            ) {
                return true;
            }
            if ($asset->getPath() && $asset->getPath() === $assetInfo->getPath()) {
                return true;
            }
        }

        return false;
    }

    /**
     * Adds a css file to the page.
     *
     * @param string $path
     * @param string $contentType
     */
    public function loadAssetFileAtBottom($path, $contentType = null)
    {
        $this->injectAsset(array('path' => $path, 'contentType' => $contentType, 'position' => 'bottom'));
    }

    /**
     * @param AssetInfo $assetInfo
     */
    public function addAsset(AssetInfo $assetInfo)
    {
        foreach ($this->handleAsset($assetInfo) as $asset) {
            if (!$this->hasAsset($asset)) {
                $this->assetsInfo[$asset->getPriority()][] = $asset;
            }
        }
    }

    /**
     * @param string $file path to javascript file
     * @param int    $priority
     */
    public function addJsFile($file, $priority = 0)
    {
        $this->loadAssetFile($file, 'text/javascript', $priority);
    }

    /**
     * @param string $script the actual javascript
     * @param int    $priority
     */
    public function addJs($script, $priority = 0)
    {
        $this->injectAsset(array('content' => $script, 'contentType' => 'text/javascript', 'priority' => $priority));
    }

    /**
     * @param string $style the actual css
     */
    public function addCss($style)
    {
        $this->injectAsset(array('content' => $style, 'contentType' => 'text/css'));
    }

    /**
     * @param string $script the actual javascript
     */
    public function addJsAtBottom($script)
    {
        $this->injectAsset(array('content' => $script, 'contentType' => 'text/javascript', 'position' => 'bottom'));
    }

    /**
     * @param string $file path to css file
     */
    public function addCssFile($file)
    {
        $this->loadAssetFile($file, 'text/css');
    }

    /**
     * @param \Jarves\AssetHandler\AssetInfo[] $assetsInfo
     */
    public function setAssetsInfo($assetsInfo)
    {
        $this->assetsInfo = $assetsInfo;
    }

    /**
     * @return \Jarves\AssetHandler\AssetInfo[]
     */
    public function getAssetsInfo()
    {
        return $this->assetsInfo;
    }

    /**
     * @param \Jarves\AssetHandler\AssetInfo[] $assetsInfoBottom
     */
    public function setAssetsInfoBottom($assetsInfoBottom)
    {
        $this->assetsInfoBottom = $assetsInfoBottom;
    }

    /**
     * @return \Jarves\AssetHandler\AssetInfo[]
     */
    public function getAssetsInfoBottom()
    {
        return $this->assetsInfoBottom;
    }

    /**
     * Adds a additionally HTML container element.
     *
     * @param string $content
     */
    public function addHeader($content)
    {
        $this->header[] = $content;
    }

    public function renderContent()
    {
        $this->stopwatch->start("Render PageResponse");
        $html = $this->buildHtml();
        $this->setContent($html);
        $this->stopwatch->stop("Render PageResponse");
    }

    /**
     * Makes sure we have domain object.
     *
     * @param Request $request
     */
    public function prepare(Request $request)
    {
        parent::prepare($request);

        if (!$this->getContent()) {
            $this->renderContent();
        }
    }

    /**
     * Builds the HTML skeleton, sends all HTTP headers and the HTTP body.
     *
     * This handles the SearchEngine stuff as well.
     *
     * @return Response
     */
    public function send()
    {
        $this->setCharset('utf-8');
        $this->eventDispatcher->dispatch('core/page-response-send-pre');

        //search engine, todo
//        if (false && Jarves::$disableSearchEngine == false) {
//            SearchEngine::createPageIndex($this->getContent());
//        }

        return parent::send();
    }

    public function getFaviconPath()
    {
        return $this->jarves->resolvePublicWebPath($this->getFavicon());
    }

    public function buildHtml()
    {
        $body = $this->getBody();

        if (is_callable($body)) {
            $body = $body();
        } else if ($this->getRenderFrontPage()) {
            $body = $this->buildBody();
        }

        $this->stopwatch->start(sprintf('Render DocType [%s]', $this->getDocType()));

        $data = [
            'pageResponse' => $this,
            'body' => $body,
            'page' => $this->pageStack->getCurrentPage(),
            'domain' => $this->pageStack->getCurrentDomain(),
            'additionalHeaderTags' => $this->getAdditionalHeaderTags()
        ];
        $data = array_merge($data, $this->getAssetTags(), $this->getParameters());

        $html = $this->templating->render(
            $this->getDocType(),
            $data
        );

        $html = preg_replace(
            '/href="#([^"]*)"/',
            'href="' . $this->pageStack->getRequest()->getBaseUrl() . '/' . '#$1"',
            $html
        );

        $this->stopwatch->stop(sprintf('Render DocType [%s]', $this->getDocType()));
//        $html = Jarves::parseObjectUrls($html);
//        $html = Jarves::translate($html);
//        Jarves::removeSearchBlocks($html);

        return $html;
    }

    /**
     * Builds the html container tag for the favicon.
     *
     * @return string
     */
    public function getFaviconTag()
    {
        if ($this->getFavicon()) {
            return sprintf(
                '<link rel="shortcut icon" type="image/x-icon" href="%s">' . PHP_EOL,
                $this->jarves->resolveWebPath($this->getFavicon())
            );
        }
    }

    /**
     * @return string
     */
    public function getLayout(Node $node)
    {
        if ($nodeId = (int)$this->pageStack->getRequest()->get('_jarves_editor_node')) {
            if ($this->editMode->isEditMode($nodeId)) {
                if ($layout = $this->pageStack->getRequest()->get('_jarves_editor_layout')) {
                    return $layout;
                }
            }
        }

        return $node->getLayout();
    }

    /**
     * Builds the html body of the current page.
     *
     * @return string
     * @throws \Exception
     */
    public function buildBody()
    {
        $this->stopwatch->start('Build PageBody');

        if (!$page = $this->pageStack->getCurrentPage()) {
            $this->stopwatch->stop('Build PageBody');
            return '';
        }

        $themeId = $page->getTheme();

        if (!$themeId && $this->pageStack->getCurrentDomain()) {
            $themeId = $this->pageStack->getCurrentDomain()->getTheme();
        }

        if (!$themeId) {
            throw new \LogicException('PageResponse class was not able to find a theme to use for rendering the body. Define one at the currentPage or currentDomain of PageStack.');
        }

        if (!$theme = $this->jarves->getConfigs()->getTheme($themeId)) {
            $this->stopwatch->stop('Build PageBody');
            throw new \LogicException(sprintf('Theme `%s` not found.', $themeId));
        }

        $layoutKey = $this->getLayout($page);
        $layout = $theme->getLayoutByKey($layoutKey);

        if ('_tray' === $layoutKey && !$layout) {
            $layout = new ThemeLayout();
            $layout->setFile('JarvesBundle:Default:tray.html.twig');
        }

        if (!$layout) {
            $this->stopwatch->stop('Build PageBody');
            throw new \LogicException(
                sprintf('Layout for `%s` in theme `%s` not found.', $layoutKey, $themeId)
            );
        }

        $layoutPath = $layout->getFile();

        try {
            $html = $this->templating->render(
                $layoutPath,
                $this->getPageViewParameter()
            );
        } catch (\Exception $e) {
            throw new \Exception(sprintf('Cant render view `%s` of theme `%s`.', $layoutPath, $themeId), 0, $e);
        }

        $this->stopwatch->stop('Build PageBody');

        return $html;
    }

    /**
     * Returns an array with page, domain, baseUrl and themeOptions, which is being used by most page view templates.
     *
     * @return array
     */
    public function getPageViewParameter()
    {
        return [
            'page' => $this->pageStack->getCurrentPage(),
            'pageResponse' => $this,
            'domain' => $this->pageStack->getCurrentDomain(),
            'baseUrl' => $this->getBaseHref(),
            'themeOptions' => $this->pageStack->getCurrentDomain() ? $this->pageStack->getCurrentDomain()->getThemeOptions() : []
        ];
    }

    /**
     * Returns `<meta http-equiv="content-type" content="text/html; charset=%s">` based on $this->getCharset().
     *
     * @return string
     */
    public function getContentTypeTag()
    {
        return sprintf(
            '<meta http-equiv="content-type" content="text/html; charset=%s">' . PHP_EOL,
            $this->getCharset()
        );
    }

    /**
     * Returns all additional html container elements.
     */
    public function getAdditionalHeaderTags()
    {
        return implode("\n    ", $this->header) . "\n";
    }

    /**
     * @return string
     */
    public function getDocType()
    {
        if ($page = $this->pageStack->getCurrentPage()) {

            $themeId = $page->getTheme() ?: $this->pageStack->getCurrentDomain()->getTheme();
            if ($theme = $this->jarves->getConfigs()->getTheme($themeId)) {

                $layoutKey = $this->getLayout($page);
                if ($layout = $theme->getLayoutByKey($layoutKey)) {
                    if ($layout->getDoctype()) {
                        return $layout->getDoctype();
                    }
                }

                if ($theme->getDoctype()) {
                    return $theme->getDoctype();
                }
            }

        }

        return $this->docType;
    }

    /**
     * The template path to the main html skeleton.
     *
     * Default is @JarvesBundle:Doctypes:html5.html.twig.
     *
     * @param string $docType
     */
    public function setDocType($docType)
    {
        $this->docType = $docType;
    }

    /**
     * @return array
     */
    public function getParameters()
    {
        return $this->parameters;
    }

    /**
     * @param array $parameters
     */
    public function setParameters($parameters)
    {
        $this->parameters = $parameters;
    }

    /**
     * @param string $language
     */
    public function setLanguage($language)
    {
        $this->language = $language;
    }

    /**
     * @return string
     */
    public function getLanguage()
    {
        return $this->language;
    }

    /**
     * @return string
     */
    public function getBaseHref()
    {
        return $this->pageStack->getRequest()->getBasePath() . '/';
    }

//    /**
//     * Returns the `<base href="%s"` based on Core\Jarves::getBaseUrl().
//     *
//     * @return string
//     */
//    public function getBaseHrefTag()
//    {
//        return sprintf('<base href="%s" %s', $this->getJarves()->getRequest()->getBasePath().'/', $this->getTagEndChar());
//    }

//    /**
//     * Returns `<meta name="DC.language" content="%s">` filled with the language of the current domain.
//     *
//     * @return string
//     */
//    public function getMetaLanguageTag()
//    {
//        if ($this->getDomainHandling() && $this->getJarves()->getCurrentDomain()) {
//            return sprintf(
//                '<meta name="DC.language" content="%s" %s',
//                Jarves::$domain->getLang(),
//                $this->getTagEndChar()
//            );
//        }
//    }

//    /**
//     * Returns the title as html tag.
//     *
//     * @return string
//     */
//    public function getTitleTag()
//    {
//        if ($this->getDomainHandling() && $this->getJarves()->getCurrentDomain()) {
//            $title = Jarves::$domain->getTitleFormat();
//
//            if (Jarves::$page) {
//                $title = str_replace(
//                    array(
//                         '%title'
//                    ),
//                    array(
//                         Jarves::$page->getAlternativeTitle() ? : Jarves::$page->getTitle()
//                    )
//                    ,
//                    $title
//                );
//            }
//        } else {
//            $title = $this->getTitle();
//        }
//
//        return sprintf("<title>%s</title>\n", $title);
//    }

    /**
     * Sets the html title.
     *
     * @param string $title
     */
    public function setTitle($title)
    {
        $this->title = $title;
    }

    /**
     * Gets the html title.
     *
     * @return string
     */
    public function getTitle()
    {
        if (null !== $this->title) {
            return $this->title;
        }

        if ($this->getDomainHandling() && $this->pageStack->getCurrentDomain()) {
            $title = $this->pageStack->getCurrentDomain()->getTitleFormat() ?: '%title%';

            if ($page = $this->pageStack->getCurrentPage()) {
                return str_replace(
                    array(
                         '%title%'
                    ),
                    array(
                        $page->getAlternativeTitle() ? : $page->getTitle()
                    )
                    ,
                    $title
                );
            }
        } else if ($this->pageStack->getCurrentPage()) {
            return $this->pageStack->getCurrentPage()->getTitle();
        }
    }

    /**
     * @param array $assets
     */
    public function setAssets($assets)
    {
        $this->assets = $assets;
    }

    /**
     * @return array
     */
    public function getAssets()
    {
        return $this->assets;
    }

    /**
     * Compares two PageResponses and returns the difference as array.
     *
     * @param  PageResponse $response
     *
     * @return array
     */
    public function diff(PageResponse $response)
    {
        $diff = array();

        $blacklist = array('pluginResponse');

        foreach ($this as $key => $value) {
            if (in_array($key, $blacklist)) {
                continue;
            }
            $getter = 'get' . ucfirst($key);

            if (!is_callable(array($this, $getter))) {
                continue;
            }

            $other = $response->$getter();

            if ('assetsInfo' === $key || 'assetsInfoBottom' === $key) {

                $assetsInfoDiff = [];
                foreach ($other as $priority => $assetInfos) {

                    if (!isset($this->assetsInfo[$priority])) {
                        $assetsInfoDiff[$priority] = $assetInfos;
                    } else {
                        if ($assetDiff = $this->arrayDiff($this->assetsInfo[$priority], $assetInfos)) {
                            $assetsInfoDiff[$priority] = $this->arrayDiff($this->assetsInfo[$priority], $assetInfos);
                        }
                    }
                }

                if ($assetsInfoDiff) {
                    $diff[$key] = $assetsInfoDiff;
                }

                continue;
            }

            if (is_array($value)) {
                $particular = $this->arrayDiff($value, $other);
                if (0 === count($particular)) {
                    unset($particular);
                }
            } elseif (is_scalar($value) && $value !== $other) {
                $particular = $other;
            }
            //todo, compare also container

            if (isset($particular)) {
                $diff[$key] = $particular;
            }

            unset($particular);
        }

        return $diff;
    }

    /**
     * @param  array $p1
     * @param  array  $p2
     *
     * @return array
     */
    public function arrayDiff($p1, $p2)
    {
        $diff = array();
        foreach ($p2 as $v) {
            if (array_search($v, $p1) === false) {
                $diff[] = $v;
            }
        }

        return $diff;
    }

    /**
     * Patches a diff from $this->diff().
     *
     * @param array $diff
     */
    public function patch(array $diff)
    {
        $refClass = new \ReflectionClass($this);
        $defaults = $refClass->getDefaultProperties();
        foreach ($diff as $key => $value) {

            if ('assetsInfo' === $key || 'assetsInfoBottom' === $key) {

                foreach ($value as $priority => $assetInfosDiff) {
                    if (!isset($this->assetsInfo[$priority])) {
                        $this->assetsInfo[$priority] = $assetInfosDiff;
                    } else {
                        $this->assetsInfo[$priority] = array_merge($this->assetsInfo[$priority], $assetInfosDiff);
                    }
                }

                continue;
            }

            if (is_array($value) && is_array($this->$key)) {
                $this->$key = array_merge($this->$key, $value);
            } else {
                if (isset($defaults[$key]) && $value != $defaults[$key]) {
                    $this->$key = $value;
                }
            }
        }
    }

    /**
     * @param \Symfony\Component\HttpFoundation\ResponseHeaderBag $headers
     */
    public function setHeaders($headers)
    {
        $this->headers = $headers;
    }

    /**
     * @return \Symfony\Component\HttpFoundation\ResponseHeaderBag
     */
    public function getHeaders()
    {
        return $this->headers;
    }

    /**
     * @return string
     */
    public function getAssetTags()
    {
        $assetHandlerContainer = $this->assetCompilerContainer;

        // sort by priority, highest => lowest
        krsort($this->assetsInfo);
        krsort($this->assetsInfoBottom);

        // flatten arrays
        /** @var AssetInfo[] $assetsTop */
        $assetsTop = $this->assetsInfo ? call_user_func_array('array_merge', $this->assetsInfo) : [];
        /** @var AssetInfo[] $assetsBottom */
        $assetsBottom = $this->assetsInfoBottom ? call_user_func_array('array_merge', $this->assetsInfoBottom) : [];

        $tagsJsTop = '';
        $tagsCssTop = '';
        $tagsJsBottom = '';
        $tagsAssets = '';
        $tagsAssetsBottom = '';

        $assetsTopGrouped = [];
        $assetsBottomGrouped = [];

        /** @var \Jarves\AssetHandler\LoaderHandlerInterface[] $loaderMap */
        $loaderMap = [];

        // group all asset per loader
        $lastLoader = null;
        $group = 0;
        foreach ($assetsTop as $asset) {
            if ($asset->getContentType()) {
                $loader = $assetHandlerContainer->getLoaderHandlerByContentType($asset->getContentType());
            } else {
                $loader = $assetHandlerContainer->getLoaderHandlerByExtension($asset->getPath());
            }

            if ($loader) {
                if ($loader->needsGrouping()) {
                    if ($loader !== $lastLoader) {
                        $group++;
                        $lastLoader = $loader;
                    }
                    //group those stuff
                    $assetsTopGrouped[get_class($loader) . '_' . $group][] = $asset;
                    $loaderMap[get_class($loader) . '_' . $group] = $loader;
                } else {
                    $group++;
                    $assetsTopGrouped[get_class($loader)][] = $asset;
                    $loaderMap[get_class($loader)] = $loader;
                }
            }
        }

        // todo, remove duplicate code
        foreach ($assetsBottom as $asset) {
            if ($asset->getContentType()) {
                $loader = $assetHandlerContainer->getLoaderHandlerByContentType($asset->getContentType());
            } else {
                $loader = $assetHandlerContainer->getLoaderHandlerByExtension($asset->getPath());
            }

            if ($loader) {
                $loaderMap[spl_object_hash($loader)] = $loader;
                $assetsBottomGrouped[spl_object_hash($loader)][] = $asset;
            }
        }

        // generate tags top
        foreach ($assetsTopGrouped as $loaderHash => $assets) {
            $loader = $loaderMap[$loaderHash];
            $tags = implode("\n", (array)$loader->getTags($assets, $this->getResourceCompression()));

            if ($loader instanceof CssHandler) {
                $tagsCssTop .= "\n" . $tags;
            } else {
                if ($loader instanceof JsHandler) {
                    $tagsJsTop .= "\n" . $tags;
                } else {
                    $tagsAssets .= "\n" . $tags;
                }
            }
        }

//        // generate tags bottom
        foreach ($assetsBottomGrouped as $loaderHash => $assets) {
            $loader = $loaderMap[$loaderHash];
            $tags = implode("\n", (array)$loader->getTags($assets, $this->getResourceCompression()));

            if ($loader instanceof JsHandler) {
                $tagsJsBottom = $tags;
            } else {
                $tagsAssetsBottom = $tags;
            }
        }

        return [
            'jsTags' => $tagsJsTop,
            'cssTags' => $tagsCssTop,
            'jsTagsBottom' => $tagsJsBottom,
            'assetTags' => $tagsAssets,
            'assetTagsBottom' => $tagsAssetsBottom
        ];
    }

    /**
     * @param string|integer $id usually the Jarves\Model\Content->id
     * @param  PluginResponseInterface $response
     * @return PageResponse
     */
    public function setPluginResponse($id, PluginResponseInterface $response)
    {
        $this->pluginResponse[$id] = $response;

        return $this;
    }

    /**
     *
     * @param Content|ContentInterface $content
     *
     * @return PluginResponse
     */
    public function getPluginResponse($content)
    {
        $id = $content;
        if ($content instanceof Content) {
            $id = $content->getId();
        }

        return isset($this->pluginResponse[$id]) ? $this->pluginResponse[$id] : '';
    }

}