[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;

/**
 * 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 $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 string $wallabagUrl Wallabag instance url
     * @param string $logoPath    Path to the logo FROM THE BUNDLE SCOPE
     */
    public function __construct($wallabagUrl, $logoPath)
    {
        $this->wallabagUrl = $wallabagUrl;
        $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;

        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));
    }

    public function exportJsonData()
    {
        return $this->prepareSerializingContent('json');
    }

    /**
     * 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->buildTOC();

        /*
         * Adding actual entries
         */

        // set tags as subjects
        foreach ($this->entries as $entry) {
            foreach ($entry->getTags() as $tag) {
                $book->setSubject($tag->getLabel());
            }

            // 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);
        }

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

        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 $entry) {
            foreach ($entry->getTags() as $tag) {
                $pdf->SetKeywords($tag->getLabel());
            }

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