src/Wallabag/CoreBundle/Helper/EntriesExport.php

   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'], $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                 ],
 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 }