[github/wallabag/wallabag.git] / src / Wallabag / CoreBundle / Helper / EntriesExport.php

<?php

namespace Wallabag\CoreBundle\Helper;

use JMS\Serializer;
use JMS\Serializer\SerializationContext;
use JMS\Serializer\SerializerBuilder;
use PHPePub\Core\EPub;
use PHPePub\Core\Structure\OPF\DublinCore;
use Symfony\Component\HttpFoundation\Response;
use Craue\ConfigBundle\Util\Config;

/**
 * This class doesn't have unit test BUT it's fully covered by a functional test with ExportControllerTest.
 */
class EntriesExport
{
    private $wallabagUrl;
    private $logoPath;
    private $title = '';
    private $entries = [];
    private $authors = ['wallabag'];
    private $language = '';
    private $tags = [];
    private $footerTemplate = '<div style="text-align:center;">
        <p>Produced by wallabag with %EXPORT_METHOD%</p>
        <p>Please open <a href="https://github.com/wallabag/wallabag/issues">an issue</a> if you have trouble with the display of this E-Book on your device.</p>
        </div';

    /**
     * @param Config $craueConfig CraueConfig instance to get wallabag instance url from database
     * @param string $logoPath    Path to the logo FROM THE BUNDLE SCOPE
     */
    public function __construct(Config $craueConfig, $logoPath)
    {
        $this->wallabagUrl = $craueConfig->get('wallabag_url');
        $this->logoPath = $logoPath;
    }

    /**
     * Define entries.
     *
     * @param array|Entry $entries An array of entries or one entry
     *
     * @return EntriesExport
     */
    public function setEntries($entries)
    {
        if (!is_array($entries)) {
            $this->language = $entries->getLanguage();
            $entries = [$entries];
        }

        $this->entries = $entries;

        foreach ($entries as $entry) {
            $this->tags[] = $entry->getTags();
        }

        return $this;
    }

    /**
     * Sets the category of which we want to get articles, or just one entry.
     *
     * @param string $method Method to get articles
     *
     * @return EntriesExport
     */
    public function updateTitle($method)
    {
        $this->title = $method.' articles';

        if ('entry' === $method) {
            $this->title = $this->entries[0]->getTitle();
        }

        return $this;
    }

    /**
     * Sets the output format.
     *
     * @param string $format
     *
     * @return Response
     */
    public function exportAs($format)
    {
        $functionName = 'produce'.ucfirst($format);
        if (method_exists($this, $functionName)) {
            return $this->$functionName();
        }

        throw new \InvalidArgumentException(sprintf('The format "%s" is not yet supported.', $format));
    }

    /**
     * Use PHPePub to dump a .epub file.
     *
     * @return Response
     */
    private function produceEpub()
    {
        /*
         * Start and End of the book
         */
        $content_start =
            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
            ."<html xmlns=\"http://www.w3.org/1999/xhtml\" xmlns:epub=\"http://www.idpf.org/2007/ops\">\n"
            .'<head>'
            ."<meta http-equiv=\"Default-Style\" content=\"text/html; charset=utf-8\" />\n"
            ."<title>wallabag articles book</title>\n"
            ."</head>\n"
            ."<body>\n";

        $bookEnd = "</body>\n</html>\n";

        $book = new EPub(EPub::BOOK_VERSION_EPUB3);

        /*
         * Book metadata
         */

        $book->setTitle($this->title);
        // Could also be the ISBN number, prefered for published books, or a UUID.
        $book->setIdentifier($this->title, EPub::IDENTIFIER_URI);
        // Not needed, but included for the example, Language is mandatory, but EPub defaults to "en". Use RFC3066 Language codes, such as "en", "da", "fr" etc.
        $book->setLanguage($this->language);
        $book->setDescription('Some articles saved on my wallabag');

        foreach ($this->authors as $author) {
            $book->setAuthor($author, $author);
        }

        // I hope this is a non existant address :)
        $book->setPublisher('wallabag', 'wallabag');
        // Strictly not needed as the book date defaults to time().
        $book->setDate(time());
        $book->setSourceURL($this->wallabagUrl);

        $book->addDublinCoreMetadata(DublinCore::CONTRIBUTOR, 'PHP');
        $book->addDublinCoreMetadata(DublinCore::CONTRIBUTOR, 'wallabag');

        /*
         * Front page
         */
        if (file_exists($this->logoPath)) {
            $book->setCoverImage('Cover.png', file_get_contents($this->logoPath), 'image/png');
        }

        $book->addChapter('Notices', 'Cover2.html', $content_start.$this->getExportInformation('PHPePub').$bookEnd);

        $book->buildTOC();

        /*
         * Adding actual entries
         */

        // set tags as subjects
        foreach ($this->entries as $entry) {
            foreach ($this->tags as $tag) {
                $book->setSubject($tag['value']);
            }

            // the reader in Kobo Devices doesn't likes special caracters
            // in filenames, we limit to A-z/0-9
            $filename = preg_replace('/[^A-Za-z0-9\-]/', '', $entry->getTitle());

            $chapter = $content_start.$entry->getContent().$bookEnd;
            $book->addChapter($entry->getTitle(), htmlspecialchars($filename).'.html', $chapter, true, EPub::EXTERNAL_REF_ADD);
        }

        return Response::create(
            $book->getBook(),
            200,
            [
                'Content-Description' => 'File Transfer',
                'Content-type' => 'application/epub+zip',
                'Content-Disposition' => 'attachment; filename="'.$this->title.'.epub"',
                'Content-Transfer-Encoding' => 'binary',
            ]
        );
    }

    /**
     * Use PHPMobi to dump a .mobi file.
     *
     * @return Response
     */
    private function produceMobi()
    {
        $mobi = new \MOBI();
        $content = new \MOBIFile();

        /*
         * Book metadata
         */
        $content->set('title', $this->title);
        $content->set('author', implode($this->authors));
        $content->set('subject', $this->title);

        /*
         * Front page
         */
        $content->appendParagraph($this->getExportInformation('PHPMobi'));
        if (file_exists($this->logoPath)) {
            $content->appendImage(imagecreatefrompng($this->logoPath));
        }
        $content->appendPageBreak();

        /*
         * Adding actual entries
         */
        foreach ($this->entries as $entry) {
            $content->appendChapterTitle($entry->getTitle());
            $content->appendParagraph($entry->getContent());
            $content->appendPageBreak();
        }
        $mobi->setContentProvider($content);

        // the browser inside Kindle Devices doesn't likes special caracters either, we limit to A-z/0-9
        $this->title = preg_replace('/[^A-Za-z0-9\-]/', '', $this->title);

        return Response::create(
            $mobi->toString(),
            200,
            [
                'Accept-Ranges' => 'bytes',
                'Content-Description' => 'File Transfer',
                'Content-type' => 'application/x-mobipocket-ebook',
                'Content-Disposition' => 'attachment; filename="'.$this->title.'.mobi"',
                'Content-Transfer-Encoding' => 'binary',
            ]
        );
    }

    /**
     * Use TCPDF to dump a .pdf file.
     *
     * @return Response
     */
    private function producePdf()
    {
        $pdf = new \TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

        /*
         * Book metadata
         */
        $pdf->SetCreator(PDF_CREATOR);
        $pdf->SetAuthor('wallabag');
        $pdf->SetTitle($this->title);
        $pdf->SetSubject('Articles via wallabag');
        $pdf->SetKeywords('wallabag');

        /*
         * Front page
         */
        $pdf->AddPage();
        $intro = '<h1>'.$this->title.'</h1>'.$this->getExportInformation('tcpdf');

        $pdf->writeHTMLCell(0, 0, '', '', $intro, 0, 1, 0, true, '', true);

        /*
         * Adding actual entries
         */
        foreach ($this->entries as $entry) {
            foreach ($this->tags as $tag) {
                $pdf->SetKeywords($tag['value']);
            }

            $pdf->AddPage();
            $html = '<h1>'.$entry->getTitle().'</h1>';
            $html .= $entry->getContent();

            $pdf->writeHTMLCell(0, 0, '', '', $html, 0, 1, 0, true, '', true);
        }

        // set image scale factor
        $pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);

        return Response::create(
            $pdf->Output('', 'S'),
            200,
            [
                'Content-Description' => 'File Transfer',
                'Content-type' => 'application/pdf',
                'Content-Disposition' => 'attachment; filename="'.$this->title.'.pdf"',
                'Content-Transfer-Encoding' => 'binary',
            ]
        );
    }

    /**
     * Inspired from CsvFileDumper.
     *
     * @return Response
     */
    private function produceCsv()
    {
        $delimiter = ';';
        $enclosure = '"';
        $handle = fopen('php://memory', 'rb+');

        fputcsv($handle, ['Title', 'URL', 'Content', 'Tags', 'MIME Type', 'Language', 'Creation date'], $delimiter, $enclosure);

        foreach ($this->entries as $entry) {
            fputcsv(
                $handle,
                [
                    $entry->getTitle(),
                    $entry->getURL(),
                    // remove new line to avoid crazy results
                    str_replace(["\r\n", "\r", "\n"], '', $entry->getContent()),
                    implode(', ', $entry->getTags()->toArray()),
                    $entry->getMimetype(),
                    $entry->getLanguage(),
                    $entry->getCreatedAt()->format('d/m/Y h:i:s'),
                ],
                $delimiter,
                $enclosure
            );
        }

        rewind($handle);
        $output = stream_get_contents($handle);
        fclose($handle);

        return Response::create(
            $output,
            200,
            [
                'Content-type' => 'application/csv',
                'Content-Disposition' => 'attachment; filename="'.$this->title.'.csv"',
                'Content-Transfer-Encoding' => 'UTF-8',
            ]
        );
    }

    /**
     * Dump a JSON file.
     *
     * @return Response
     */
    private function produceJson()
    {
        return Response::create(
            $this->prepareSerializingContent('json'),
            200,
            [
                'Content-type' => 'application/json',
                'Content-Disposition' => 'attachment; filename="'.$this->title.'.json"',
                'Content-Transfer-Encoding' => 'UTF-8',
            ]
        );
    }

    /**
     * Dump a XML file.
     *
     * @return Response
     */
    private function produceXml()
    {
        return Response::create(
            $this->prepareSerializingContent('xml'),
            200,
            [
                'Content-type' => 'application/xml',
                'Content-Disposition' => 'attachment; filename="'.$this->title.'.xml"',
                'Content-Transfer-Encoding' => 'UTF-8',
            ]
        );
    }

    /**
     * Dump a TXT file.
     *
     * @return Response
     */
    private function produceTxt()
    {
        $content = '';
        $bar = str_repeat('=', 100);
        foreach ($this->entries as $entry) {
            $content .= "\n\n".$bar."\n\n".$entry->getTitle()."\n\n".$bar."\n\n";
            $content .= trim(preg_replace('/\s+/S', ' ', strip_tags($entry->getContent())))."\n\n";
        }

        return Response::create(
            $content,
            200,
            [
                'Content-type' => 'text/plain',
                'Content-Disposition' => 'attachment; filename="'.$this->title.'.txt"',
                'Content-Transfer-Encoding' => 'UTF-8',
            ]
        );
    }

    /**
     * Return a Serializer object for producing processes that need it (JSON & XML).
     *
     * @param string $format
     *
     * @return Serializer
     */
    private function prepareSerializingContent($format)
    {
        $serializer = SerializerBuilder::create()->build();

        return $serializer->serialize(
            $this->entries,
            $format,
            SerializationContext::create()->setGroups(['entries_for_user'])
        );
    }

    /**
     * Return a kind of footer / information for the epub.
     *
     * @param string $type Generator of the export, can be: tdpdf, PHPePub, PHPMobi
     *
     * @return string
     */
    private function getExportInformation($type)
    {
        $info = str_replace('%EXPORT_METHOD%', $type, $this->footerTemplate);

        if ('tcpdf' === $type) {
            return str_replace('%IMAGE%', '<img src="'.$this->logoPath.'" />', $info);
        }

        return str_replace('%IMAGE%', '', $info);
    }
}
Commit	Line	Data
	1	<?php
	2
	3	namespace Wallabag\CoreBundle\Helper;
	4
	5	use JMS\Serializer;
	6	use JMS\Serializer\SerializationContext;
	7	use JMS\Serializer\SerializerBuilder;
	8	use PHPePub\Core\EPub;
	9	use PHPePub\Core\Structure\OPF\DublinCore;
	10	use Symfony\Component\HttpFoundation\Response;
	11	use Craue\ConfigBundle\Util\Config;
	12
	13	/**
	14	* This class doesn't have unit test BUT it's fully covered by a functional test with ExportControllerTest.
	15	*/
	16	class EntriesExport
	17	{
	18	private $wallabagUrl;
	19	private $logoPath;
	20	private $title = '';
	21	private $entries = [];
	22	private $authors = ['wallabag'];
	23	private $language = '';
	24	private $tags = [];
	25	private $footerTemplate = '<div style="text-align:center;">
	26	<p>Produced by wallabag with %EXPORT_METHOD%</p>
	27	<p>Please open <a href="https://github.com/wallabag/wallabag/issues">an issue</a> if you have trouble with the display of this E-Book on your device.</p>
	28	</div';
	29
	30	/**
	31	* @param Config $craueConfig CraueConfig instance to get wallabag instance url from database
	32	* @param string $logoPath Path to the logo FROM THE BUNDLE SCOPE
	33	*/
	34	public function __construct(Config $craueConfig, $logoPath)
	35	{
	36	$this->wallabagUrl = $craueConfig->get('wallabag_url');
	37	$this->logoPath = $logoPath;
	38	}
	39
	40	/**
	41	* Define entries.
	42	*
	43	* @param array\|Entry $entries An array of entries or one entry
	44	*
	45	* @return EntriesExport
	46	*/
	47	public function setEntries($entries)
	48	{
	49	if (!is_array($entries)) {
	50	$this->language = $entries->getLanguage();
	51	$entries = [$entries];
	52	}
	53
	54	$this->entries = $entries;
	55
	56	foreach ($entries as $entry) {
	57	$this->tags[] = $entry->getTags();
	58	}
	59
	60	return $this;
	61	}
	62
	63	/**
	64	* Sets the category of which we want to get articles, or just one entry.
	65	*
	66	* @param string $method Method to get articles
	67	*
	68	* @return EntriesExport
	69	*/
	70	public function updateTitle($method)
	71	{
	72	$this->title = $method.' articles';
	73
	74	if ('entry' === $method) {
	75	$this->title = $this->entries[0]->getTitle();
	76	}
	77
	78	return $this;
	79	}
	80
	81	/**
	82	* Sets the output format.
	83	*
	84	* @param string $format
	85	*
	86	* @return Response
	87	*/
	88	public function exportAs($format)
	89	{
	90	$functionName = 'produce'.ucfirst($format);
	91	if (method_exists($this, $functionName)) {
	92	return $this->$functionName();
	93	}
	94
	95	throw new \InvalidArgumentException(sprintf('The format "%s" is not yet supported.', $format));
	96	}
	97
	98	/**
	99	* Use PHPePub to dump a .epub file.
	100	*
	101	* @return Response
	102	*/
	103	private function produceEpub()
	104	{
	105	/*
	106	* Start and End of the book
	107	*/
	108	$content_start =
	109	"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
	110	."<html xmlns=\"http://www.w3.org/1999/xhtml\" xmlns:epub=\"http://www.idpf.org/2007/ops\">\n"
	111	.'<head>'
	112	."<meta http-equiv=\"Default-Style\" content=\"text/html; charset=utf-8\" />\n"
	113	."<title>wallabag articles book</title>\n"
	114	."</head>\n"
	115	."<body>\n";
	116
	117	$bookEnd = "</body>\n</html>\n";
	118
	119	$book = new EPub(EPub::BOOK_VERSION_EPUB3);
	120
	121	/*
	122	* Book metadata
	123	*/
	124
	125	$book->setTitle($this->title);
	126	// Could also be the ISBN number, prefered for published books, or a UUID.
	127	$book->setIdentifier($this->title, EPub::IDENTIFIER_URI);
	128	// Not needed, but included for the example, Language is mandatory, but EPub defaults to "en". Use RFC3066 Language codes, such as "en", "da", "fr" etc.
	129	$book->setLanguage($this->language);
	130	$book->setDescription('Some articles saved on my wallabag');
	131
	132	foreach ($this->authors as $author) {
	133	$book->setAuthor($author, $author);
	134	}
	135
	136	// I hope this is a non existant address :)
	137	$book->setPublisher('wallabag', 'wallabag');
	138	// Strictly not needed as the book date defaults to time().
	139	$book->setDate(time());
	140	$book->setSourceURL($this->wallabagUrl);
	141
	142	$book->addDublinCoreMetadata(DublinCore::CONTRIBUTOR, 'PHP');
	143	$book->addDublinCoreMetadata(DublinCore::CONTRIBUTOR, 'wallabag');
	144
	145	/*
	146	* Front page
	147	*/
	148	if (file_exists($this->logoPath)) {
	149	$book->setCoverImage('Cover.png', file_get_contents($this->logoPath), 'image/png');
	150	}
	151
	152	$book->addChapter('Notices', 'Cover2.html', $content_start.$this->getExportInformation('PHPePub').$bookEnd);
	153
	154	$book->buildTOC();
	155
	156	/*
	157	* Adding actual entries
	158	*/
	159
	160	// set tags as subjects
	161	foreach ($this->entries as $entry) {
	162	foreach ($this->tags as $tag) {
	163	$book->setSubject($tag['value']);
	164	}
	165
	166	// the reader in Kobo Devices doesn't likes special caracters
	167	// in filenames, we limit to A-z/0-9
	168	$filename = preg_replace('/[^A-Za-z0-9\-]/', '', $entry->getTitle());
	169
	170	$chapter = $content_start.$entry->getContent().$bookEnd;
	171	$book->addChapter($entry->getTitle(), htmlspecialchars($filename).'.html', $chapter, true, EPub::EXTERNAL_REF_ADD);
	172	}
	173
	174	return Response::create(
	175	$book->getBook(),
	176	200,
	177	[
	178	'Content-Description' => 'File Transfer',
	179	'Content-type' => 'application/epub+zip',
	180	'Content-Disposition' => 'attachment; filename="'.$this->title.'.epub"',
	181	'Content-Transfer-Encoding' => 'binary',
	182	]
	183	);
	184	}
	185
	186	/**
	187	* Use PHPMobi to dump a .mobi file.
	188	*
	189	* @return Response
	190	*/
	191	private function produceMobi()
	192	{
	193	$mobi = new \MOBI();
	194	$content = new \MOBIFile();
	195
	196	/*
	197	* Book metadata
	198	*/
	199	$content->set('title', $this->title);
	200	$content->set('author', implode($this->authors));
	201	$content->set('subject', $this->title);
	202
	203	/*
	204	* Front page
	205	*/
	206	$content->appendParagraph($this->getExportInformation('PHPMobi'));
	207	if (file_exists($this->logoPath)) {
	208	$content->appendImage(imagecreatefrompng($this->logoPath));
	209	}
	210	$content->appendPageBreak();
	211
	212	/*
	213	* Adding actual entries
	214	*/
	215	foreach ($this->entries as $entry) {
	216	$content->appendChapterTitle($entry->getTitle());
	217	$content->appendParagraph($entry->getContent());
	218	$content->appendPageBreak();
	219	}
	220	$mobi->setContentProvider($content);
	221
	222	// the browser inside Kindle Devices doesn't likes special caracters either, we limit to A-z/0-9
	223	$this->title = preg_replace('/[^A-Za-z0-9\-]/', '', $this->title);
	224
	225	return Response::create(
	226	$mobi->toString(),
	227	200,
	228	[
	229	'Accept-Ranges' => 'bytes',
	230	'Content-Description' => 'File Transfer',
	231	'Content-type' => 'application/x-mobipocket-ebook',
	232	'Content-Disposition' => 'attachment; filename="'.$this->title.'.mobi"',
	233	'Content-Transfer-Encoding' => 'binary',
	234	]
	235	);
	236	}
	237
	238	/**
	239	* Use TCPDF to dump a .pdf file.
	240	*
	241	* @return Response
	242	*/
	243	private function producePdf()
	244	{
	245	$pdf = new \TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);
	246
	247	/*
	248	* Book metadata
	249	*/
	250	$pdf->SetCreator(PDF_CREATOR);
	251	$pdf->SetAuthor('wallabag');
	252	$pdf->SetTitle($this->title);
	253	$pdf->SetSubject('Articles via wallabag');
	254	$pdf->SetKeywords('wallabag');
	255
	256	/*
	257	* Front page
	258	*/
	259	$pdf->AddPage();
	260	$intro = '<h1>'.$this->title.'</h1>'.$this->getExportInformation('tcpdf');
	261
	262	$pdf->writeHTMLCell(0, 0, '', '', $intro, 0, 1, 0, true, '', true);
	263
	264	/*
	265	* Adding actual entries
	266	*/
	267	foreach ($this->entries as $entry) {
	268	foreach ($this->tags as $tag) {
	269	$pdf->SetKeywords($tag['value']);
	270	}
	271
	272	$pdf->AddPage();
	273	$html = '<h1>'.$entry->getTitle().'</h1>';
	274	$html .= $entry->getContent();
	275
	276	$pdf->writeHTMLCell(0, 0, '', '', $html, 0, 1, 0, true, '', true);
	277	}
	278
	279	// set image scale factor
	280	$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);
	281
	282	return Response::create(
	283	$pdf->Output('', 'S'),
	284	200,
	285	[
	286	'Content-Description' => 'File Transfer',
	287	'Content-type' => 'application/pdf',
	288	'Content-Disposition' => 'attachment; filename="'.$this->title.'.pdf"',
	289	'Content-Transfer-Encoding' => 'binary',
	290	]
	291	);
	292	}
	293
	294	/**
	295	* Inspired from CsvFileDumper.
	296	*
	297	* @return Response
	298	*/
	299	private function produceCsv()
	300	{
	301	$delimiter = ';';
	302	$enclosure = '"';
	303	$handle = fopen('php://memory', 'rb+');
	304
	305	fputcsv($handle, ['Title', 'URL', 'Content', 'Tags', 'MIME Type', 'Language', 'Creation date'], $delimiter, $enclosure);
	306
	307	foreach ($this->entries as $entry) {
	308	fputcsv(
	309	$handle,
	310	[
	311	$entry->getTitle(),
	312	$entry->getURL(),
	313	// remove new line to avoid crazy results
	314	str_replace(["\r\n", "\r", "\n"], '', $entry->getContent()),
	315	implode(', ', $entry->getTags()->toArray()),
	316	$entry->getMimetype(),
	317	$entry->getLanguage(),
	318	$entry->getCreatedAt()->format('d/m/Y h:i:s'),
	319	],
	320	$delimiter,
	321	$enclosure
	322	);
	323	}
	324
	325	rewind($handle);
	326	$output = stream_get_contents($handle);
	327	fclose($handle);
	328
	329	return Response::create(
	330	$output,
	331	200,
	332	[
	333	'Content-type' => 'application/csv',
	334	'Content-Disposition' => 'attachment; filename="'.$this->title.'.csv"',
	335	'Content-Transfer-Encoding' => 'UTF-8',
	336	]
	337	);
	338	}
	339
	340	/**
	341	* Dump a JSON file.
	342	*
	343	* @return Response
	344	*/
	345	private function produceJson()
	346	{
	347	return Response::create(
	348	$this->prepareSerializingContent('json'),
	349	200,
	350	[
	351	'Content-type' => 'application/json',
	352	'Content-Disposition' => 'attachment; filename="'.$this->title.'.json"',
	353	'Content-Transfer-Encoding' => 'UTF-8',
	354	]
	355	);
	356	}
	357
	358	/**
	359	* Dump a XML file.
	360	*
	361	* @return Response
	362	*/
	363	private function produceXml()
	364	{
	365	return Response::create(
	366	$this->prepareSerializingContent('xml'),
	367	200,
	368	[
	369	'Content-type' => 'application/xml',
	370	'Content-Disposition' => 'attachment; filename="'.$this->title.'.xml"',
	371	'Content-Transfer-Encoding' => 'UTF-8',
	372	]
	373	);
	374	}
	375
	376	/**
	377	* Dump a TXT file.
	378	*
	379	* @return Response
	380	*/
	381	private function produceTxt()
	382	{
	383	$content = '';
	384	$bar = str_repeat('=', 100);
	385	foreach ($this->entries as $entry) {
	386	$content .= "\n\n".$bar."\n\n".$entry->getTitle()."\n\n".$bar."\n\n";
	387	$content .= trim(preg_replace('/\s+/S', ' ', strip_tags($entry->getContent())))."\n\n";
	388	}
	389
	390	return Response::create(
	391	$content,
	392	200,
	393	[
	394	'Content-type' => 'text/plain',
	395	'Content-Disposition' => 'attachment; filename="'.$this->title.'.txt"',
	396	'Content-Transfer-Encoding' => 'UTF-8',
	397	]
	398	);
	399	}
	400
	401	/**
	402	* Return a Serializer object for producing processes that need it (JSON & XML).
	403	*
	404	* @param string $format
	405	*
	406	* @return Serializer
	407	*/
	408	private function prepareSerializingContent($format)
	409	{
	410	$serializer = SerializerBuilder::create()->build();
	411
	412	return $serializer->serialize(
	413	$this->entries,
	414	$format,
	415	SerializationContext::create()->setGroups(['entries_for_user'])
	416	);
	417	}
	418
	419	/**
	420	* Return a kind of footer / information for the epub.
	421	*
	422	* @param string $type Generator of the export, can be: tdpdf, PHPePub, PHPMobi
	423	*
	424	* @return string
	425	*/
	426	private function getExportInformation($type)
	427	{
	428	$info = str_replace('%EXPORT_METHOD%', $type, $this->footerTemplate);
	429
	430	if ('tcpdf' === $type) {
	431	return str_replace('%IMAGE%', '<img src="'.$this->logoPath.'" />', $info);
	432	}
	433
	434	return str_replace('%IMAGE%', '', $info);
	435	}
	436	}