Document::getInfo() - Code Metrics - Inspection of "Some work on the Info object" - Bacon/BaconPdf - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( a05270...10fb5b )

by Ben

created 2015-11-28 01:15 UTC

Document::getInfo() A

↳ Parent: Document

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	4
rs	10
cc	1
eloc	2
nc	1
nop	0

<?php
/**
 * BaconPdf
 *
 * @link      http://github.com/Bacon/BaconPdf For the canonical source repository
 * @copyright 2015 Ben 'DASPRiD' Scholzen
 * @license   http://opensource.org/licenses/BSD-2-Clause Simplified BSD License
 */

namespace Bacon\Pdf;

use Bacon\Pdf\Exception\UnexpectedValueException;
use Bacon\Pdf\Object\ArrayObject;
use Bacon\Pdf\Object\DictionaryObject;
use Bacon\Pdf\Object\HexadecimalStringObject;
use Bacon\Pdf\Object\IndirectObject;
use Bacon\Pdf\Object\NameObject;
use Bacon\Pdf\Object\NumericObject;
use Bacon\Pdf\Object\ObjectInterface;
use Bacon\Pdf\Object\ObjectStorage;
use Bacon\Pdf\Object\StreamObject;
use Bacon\Pdf\Type\DateType;
use Bacon\Pdf\Type\TextStringType;
use Bacon\Pdf\Utils\EncryptionUtils;
use DateTimeImmutable;
use SplFileObject;
use SplObjectStorage;

class Document
{
    /**
     * @var string
     */
    private $version = '1.7';

    /**
     * @var ObjectStorage
     */
    private $objects;

    /**
     * @var IndirectObject
     */
    private $pages;

    /**
     * @var IndirectObject
     */
    private $info;

    /**
     * @var IndirectObject
     */
    private $root;

    /**
     * @var IndirectObject|null
     */
    private $encrypt;

    /**
     * @var string|null
     */
    private $encryptionKey;

    /**
     * @var HexadecimalStringObject
     */
    private $firstId;

    /**
     * @var HexadecimalStringObject
     */
    private $secondId;

    /**
     * Creates a new PDF document.
     */
    public function __construct()
    {
        $this->objects = new ObjectStorage();

        $pages = new DictionaryObject([
            'Type' => new NameObject('Pages'),
            'Count' => new NumericObject(0),
            'Kids' => new ArrayObject(),
        ]);
        $this->pages = $this->objects->addObject($pages);

        $info = new DictionaryObject([
            'Producer' => new TextStringType('BaconPdf'),
            'CreationDate' => new DateType(new DateTimeImmutable()),
        ]);
        $this->info = $this->objects->addObject($info);

        $root = new DictionaryObject([
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
            'Type' => new NameObject('Catalog'),
            'Pages' => $this->pages,
        ]);
        $this->root = $this->objects->addObject($root);

        $this->firstId  = new HexadecimalStringObject($this->generateFileIdentifier());
        $this->secondId = new HexadecimalStringObject($this->generateFileIdentifier());
    }

    /**
     * @return Info
     */
    public function getInfo()
    {
        return new Info($this->info->getObject());

    }

    /**
     * Enables encryption for the document.
     *
     * @param string      $userPassword
     * @param string|null $ownerPassword
     * @param bool        $use128bit
     */
    public function enableEncryption($userPassword, $ownerPassword = null, $use128bit = true)
    {
        if (null === $ownerPassword) {
            $ownerPassword = $userPassword;
        }

        if ($use128bit) {
            $algorithm = 2;
            $revision  = 3;
            $keyLength = 128 / 8;
        } else {
            $algorithm = 1;
            $revision  = 2;
            $keyLength = 40 / 8;
        }

        $permissions = -1;
        $ownerEntry  = EncryptionUtils::computeOwnerEntry($ownerPassword, $userPassword, $revision, $keyLength);

        if (2 === $revision) {
            list($userEntry, $key) = EncryptionUtils::computeUserEntryRev2(
                $userPassword,
                $ownerEntry,
                $revision,
                $this->firstId->getValue()
            );
        } else {
            list($userEntry, $key) = EncryptionUtils::computeUserEntryRev3OrGreater(
                $userPassword,
                $revision,
                $keyLength,
                $ownerEntry,
                $permissions,
                $this->firstId->getValue()
            );
        }

        $encrypt = new DictionaryObject();

        $encrypt['Filter'] = new NameObject('Standard');
        $encrypt['V'] = new NumericObject($algorithm);

        if (2 === $algorithm) {
            $encrypt['Length'] = new NumericObject($keyLength * 8);
        }

        $encrypt['R'] = new NumericObject($revision);
        $encrypt['O'] = new HexadecimalStringObject($ownerEntry);
        $encrypt['U'] = new HexadecimalStringObject($userEntry);
        $encrypt['P'] = new NumericObject($permissions);

        $this->encrypt = $this->objects->addObject($encrypt);
        $this->encryptionKey = $key;
    }

    /**
     * Writes the document to a file object.
     *
     * @param SplFileObject $fileObject
     */
    public function write(SplFileObject $fileObject)
    {
        $this->resolveCircularReferences();
        $this->writeHeader($fileObject);

        $objectOffsets = $this->writeObjects($fileObject);
        $xrefOffset    = $fileObject->ftell();

        $this->writeXrefTable($fileObject, $objectOffsets);
        $this->writeTrailer($fileObject);
        $this->writeFooter($fileObject, $xrefOffset);
    }

    /**
     * Writes the document to a file.
     *
     * @param string $filename
     */
    public function writeToFile($filename)
    {
        $this->write(new SplFileObject($filename, 'wb'));
    }

    /**
     * Outputs the document directly.
     */
    public function output()
    {
        $this->write(new SplFileObject('php://stdout', 'wb'));
    }

    /**
     * Returns the document as a string.
     *
     * @return string
     */
    public function toString()
    {
        $fileObject = new SplFileObject('php://memory', 'w+b');
        $this->write($fileObject);

        $fileObject->fseek(0, SEEK_END);
        $length = $fileObject->ftell();
        $fileObject->fseek(0);

        return $fileObject->fread($length);
    }

    /**
     * Resolves circular references in page objects.
     */
    private function resolveCircularReferences()
    {
        $externalReferenceMap = new SplObjectStorage();

        foreach ($this->objects as $id => $object) {
            if (!$object instanceof Page || null === $object->getIndirectReference()) {
                continue;
            }

            $indirectObject = $object->getIndirectReference();
            $objectStorage  = $indirectObject->getObjectStorage();
            $generation     = $indirectObject->getGeneration();

            if (!$externalReferenceMap->contains($objectStorage)) {
                $externalReferenceMap->attach($objectStorage, []);
            }

            if (!array_key_exists($generation, $externalReferenceMap[$objectStorage])) {
                $externalReferenceMap[$objectStorage][$generation] = [];
            }

            $externalReferenceMap[$objectStorage][$generation][$id] = new IndirectObject($id, 0, $this->objects);
        }

        $stack = [];
        $this->sweepIndirectReferences($externalReferenceMap, $this->root, $stack);
    }

    /**
     * @param  SplObjectStorage $externalReferenceMap
     * @param  ObjectInterface  $object
     * @param  array            $stack
     * @return ObjectInterface
     */
    private function sweepIndirectReferences(
        SplObjectStorage $externalReferenceMap,
        ObjectInterface $object,
        array &$stack
    ) {
        if ($object instanceof DictionaryObject || $object instanceof ArrayObject) {
            foreach ($object as $index => $childObject) {
                $childObject = $this->sweepIndirectReferences($externalReferenceMap, $childObject, $stack);

                if ($childObject instanceof StreamObject) {
                    $childObject = $this->objects->addObject($childObject);
                }

                $object[$index] = $childObject;
            }

            return $object;
        }

        if ($object instanceof IndirectObject) {
            $objectStorage = $object->getObjectStorage();

            if ($objectStorage === $this->objects) {
                if (in_array($object->getId(), $stack)) {
                    return $object;
                }

                $stack[] = $object->getId();
                $this->sweepIndirectReferences($externalReferenceMap, $this->objects->getObject($object), $stack);

                return $object;
            }

            $id         = $object->getId();
            $generation = $object->getGeneration();

            if (!$externalReferenceMap->contains($objectStorage)) {
                $externalReferenceMap->attach($objectStorage, []);
            }

            $map = $externalReferenceMap[$objectStorage];

            if (isset($externalReferenceMap[$objectStorage][$generation][$id])) {
                return $map[$generation][$id];
            }

            $newObject         = $objectStorage->getObject($object);
            $newId             = $this->objects->reserveSlot();
            $newIndirectObject = new IndirectObject($newId, 0, $this->objects);

            if (!array_key_exists($generation, $externalReferenceMap[$objectStorage])) {
                $externalReferenceMap[$objectStorage][$generation] = [];
            }

            $externalReferenceMap[$objectStorage][$generation][$id] = $newIndirectObject;
            $sweepedIndirectObject = $this->sweepIndirectReferences($externalReferenceMap, $newObject, $stack);

            if (!$sweepedIndirectObject instanceof IndirectObject) {
                throw new UnexpectedValueException(sprintf(
                    'Expected sweeped object to be of type %s, got %s',
                    IndirectObject::class,
                    get_class($sweepedIndirectObject)
                ));
            }

            $this->objects->fillSlot($sweepedIndirectObject);

            return $newIndirectObject;
        }

        return $object;
    }

    /**
     * Writes the file header.
     *
     * @param SplFileObject $fileObject
     */
    private function writeHeader(SplFileObject $fileObject)
    {
        $fileObject->fwrite(sprintf("%PDF-%s\n", $this->version));
        $fileObject->fwrite("%\xff\xff\xff\xff\n");
    }

    /**
     * Writes all objects.
     *
     * @param  SplFileObject $fileObject
     * @return array
     */
    private function writeObjects(SplFileObject $fileObject)
    {
        $objectOffsets = [];

        foreach ($this->objects as $object) {
            $indirectObject = $this->objects->getIndirectObject($object);
            $id = $indirectObject->getId();
            $objectOffsets[] = $fileObject->ftell();
            $fileObject->fwrite(sprintf("%d 0 obj\n", $id));

            $key = null;

            if (null !== $this->encrypt && $id !== $this->encrypt->getId()) {
                $key = substr(hex2bin(md5(
                    $this->encryptionKey
                    . substr(pack('V', $id), 0, 3)
                    . substr(pack('V', $indirectObject->getGeneration()), 0, 2)
                )), 0, min(16, strlen($this->encryptionKey) + 5));
            }

            $object->writeToStream($fileObject, $key);
            $fileObject->fwrite("\nendobj\n");
        }

        return $objectOffsets;
    }

    /**
     * Writes the xref table.
     *
     * @param SplFileObject $fileObject
     * @param array         $objectOffsets
     */
    private function writeXrefTable(SplFileObject $fileObject, array $objectOffsets)
    {
        $fileObject->fwrite("xref\n");
        $fileObject->fwrite(sprintf("0 %d\n", count($this->objects) + 1));
        $fileObject->fwrite(sprintf("%010d %05d f \n", 0, 65535));

        foreach ($objectOffsets as $offset) {
            $fileObject->fwrite(sprintf("%010d %05d n \n", $offset, 0));
        }
    }

    /**
     * Writes the trailer.
     *
     * @param SplFileObject $fileObject
     */
    private function writeTrailer(SplFileObject $fileObject)
    {
        $fileObject->fwrite("trailer\n");
        $trailer = new DictionaryObject();

        $trailer['Size'] = new NumericObject(count($this->objects) + 1);
        $trailer['Root'] = $this->root;
        $trailer['Info'] = $this->info;
        $trailer['Id'] = new ArrayObject([$this->firstId, $this->secondId]);
        $trailer->writeToStream($fileObject, null);
    }

    /**
     * Writes the file footer.
     *
     * @param SplFileObject $fileObject
     * @param int           $xrefOffset
     */
    private function writeFooter(SplFileObject $fileObject, $xrefOffset)
    {
        $fileObject->fwrite("\n");
        $fileObject->fwrite("startxref\n");
        $fileObject->fwrite(sprintf("%d\n", $xrefOffset));
        $fileObject->fwrite("%%%EOF\n");
    }

    /**
     * Computes a file identifier.
     *
     * @return string
     */
    private function generateFileIdentifier()
    {
        return hex2bin(md5(microtime()));
    }
}


1			<?php
2			/**
3			* BaconPdf
4			*
5			* @link http://github.com/Bacon/BaconPdf For the canonical source repository
6			* @copyright 2015 Ben 'DASPRiD' Scholzen
7			* @license http://opensource.org/licenses/BSD-2-Clause Simplified BSD License
8			*/
9
10			namespace Bacon\Pdf;
11
12			use Bacon\Pdf\Exception\UnexpectedValueException;
13			use Bacon\Pdf\Object\ArrayObject;
14			use Bacon\Pdf\Object\DictionaryObject;
15			use Bacon\Pdf\Object\HexadecimalStringObject;
16			use Bacon\Pdf\Object\IndirectObject;
17			use Bacon\Pdf\Object\NameObject;
18			use Bacon\Pdf\Object\NumericObject;
19			use Bacon\Pdf\Object\ObjectInterface;
20			use Bacon\Pdf\Object\ObjectStorage;
21			use Bacon\Pdf\Object\StreamObject;
22			use Bacon\Pdf\Type\DateType;
23			use Bacon\Pdf\Type\TextStringType;
24			use Bacon\Pdf\Utils\EncryptionUtils;
25			use DateTimeImmutable;
26			use SplFileObject;
27			use SplObjectStorage;
28
29			class Document
30			{
31			/**
32			* @var string
33			*/
34			private $version = '1.7';
35
36			/**
37			* @var ObjectStorage
38			*/
39			private $objects;
40
41			/**
42			* @var IndirectObject
43			*/
44			private $pages;
45
46			/**
47			* @var IndirectObject
48			*/
49			private $info;
50
51			/**
52			* @var IndirectObject
53			*/
54			private $root;
55
56			/**
57			* @var IndirectObject\|null
58			*/
59			private $encrypt;
60
61			/**
62			* @var string\|null
63			*/
64			private $encryptionKey;
65
66			/**
67			* @var HexadecimalStringObject
68			*/
69			private $firstId;
70
71			/**
72			* @var HexadecimalStringObject
73			*/
74			private $secondId;
75
76			/**
77			* Creates a new PDF document.
78			*/
79			public function __construct()
80			{
81			$this->objects = new ObjectStorage();
82
83			$pages = new DictionaryObject([
84			'Type' => new NameObject('Pages'),
85			'Count' => new NumericObject(0),
86			'Kids' => new ArrayObject(),
87			]);
88			$this->pages = $this->objects->addObject($pages);
89
90			$info = new DictionaryObject([
91			'Producer' => new TextStringType('BaconPdf'),
92			'CreationDate' => new DateType(new DateTimeImmutable()),
93			]);
94			$this->info = $this->objects->addObject($info);
95
96			$root = new DictionaryObject([
			0 ignored issues – show Documentation introduced 2015-11-28 01:18 UTC by Report Bug Copy Issue Report `array('Type' => new \Bac...Pages' => $this->pages)` is of type `array<string,object<Baco...IndirectObject>\|null"}>`, but the function expects a `array<integer,object<Bac...bject\ObjectInterface>>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
97			'Type' => new NameObject('Catalog'),
98			'Pages' => $this->pages,
99			]);
100			$this->root = $this->objects->addObject($root);
101
102			$this->firstId = new HexadecimalStringObject($this->generateFileIdentifier());
103			$this->secondId = new HexadecimalStringObject($this->generateFileIdentifier());
104			}
105
106			/**
107			* @return Info
108			*/
109			public function getInfo()
110			{
111			return new Info($this->info->getObject());
			0 ignored issues – show Compatibility introduced 2015-11-28 01:18 UTC by Report Bug Copy Issue Report `$this->info->getObject()` of type `object<Bacon\Pdf\Object\ObjectInterface>` is not a sub-type of `object<Bacon\Pdf\Object\DictionaryObject>`. It seems like you assume a concrete implementation of the interface `Bacon\Pdf\Object\ObjectInterface` to be always present. This check looks for parameters that are defined as one type in their type hint or doc comment but seem to be used as a narrower type, i.e an implementation of an interface or a subclass. Consider changing the type of the parameter or doing an instanceof check before assuming your parameter is of the expected type. Loading history...
112			}
113
114			/**
115			* Enables encryption for the document.
116			*
117			* @param string $userPassword
118			* @param string\|null $ownerPassword
119			* @param bool $use128bit
120			*/
121			public function enableEncryption($userPassword, $ownerPassword = null, $use128bit = true)
122			{
123			if (null === $ownerPassword) {
124			$ownerPassword = $userPassword;
125			}
126
127			if ($use128bit) {
128			$algorithm = 2;
129			$revision = 3;
130			$keyLength = 128 / 8;
131			} else {
132			$algorithm = 1;
133			$revision = 2;
134			$keyLength = 40 / 8;
135			}
136
137			$permissions = -1;
138			$ownerEntry = EncryptionUtils::computeOwnerEntry($ownerPassword, $userPassword, $revision, $keyLength);
139
140			if (2 === $revision) {
141			list($userEntry, $key) = EncryptionUtils::computeUserEntryRev2(
142			$userPassword,
143			$ownerEntry,
144			$revision,
145			$this->firstId->getValue()
146			);
147			} else {
148			list($userEntry, $key) = EncryptionUtils::computeUserEntryRev3OrGreater(
149			$userPassword,
150			$revision,
151			$keyLength,
152			$ownerEntry,
153			$permissions,
154			$this->firstId->getValue()
155			);
156			}
157
158			$encrypt = new DictionaryObject();
			0 ignored issues – show Bug introduced 2015-11-28 01:18 UTC by Report Bug Copy Issue Report The call to `DictionaryObject::__construct()` misses a required argument `$objects`. This check looks for function calls that miss required arguments. Loading history...
159			$encrypt['Filter'] = new NameObject('Standard');
160			$encrypt['V'] = new NumericObject($algorithm);
161
162			if (2 === $algorithm) {
163			$encrypt['Length'] = new NumericObject($keyLength * 8);
164			}
165
166			$encrypt['R'] = new NumericObject($revision);
167			$encrypt['O'] = new HexadecimalStringObject($ownerEntry);
168			$encrypt['U'] = new HexadecimalStringObject($userEntry);
169			$encrypt['P'] = new NumericObject($permissions);
170
171			$this->encrypt = $this->objects->addObject($encrypt);
172			$this->encryptionKey = $key;
173			}
174
175			/**
176			* Writes the document to a file object.
177			*
178			* @param SplFileObject $fileObject
179			*/
180			public function write(SplFileObject $fileObject)
181			{
182			$this->resolveCircularReferences();
183			$this->writeHeader($fileObject);
184
185			$objectOffsets = $this->writeObjects($fileObject);
186			$xrefOffset = $fileObject->ftell();
187
188			$this->writeXrefTable($fileObject, $objectOffsets);
189			$this->writeTrailer($fileObject);
190			$this->writeFooter($fileObject, $xrefOffset);
191			}
192
193			/**
194			* Writes the document to a file.
195			*
196			* @param string $filename
197			*/
198			public function writeToFile($filename)
199			{
200			$this->write(new SplFileObject($filename, 'wb'));
201			}
202
203			/**
204			* Outputs the document directly.
205			*/
206			public function output()
207			{
208			$this->write(new SplFileObject('php://stdout', 'wb'));
209			}
210
211			/**
212			* Returns the document as a string.
213			*
214			* @return string
215			*/
216			public function toString()
217			{
218			$fileObject = new SplFileObject('php://memory', 'w+b');
219			$this->write($fileObject);
220
221			$fileObject->fseek(0, SEEK_END);
222			$length = $fileObject->ftell();
223			$fileObject->fseek(0);
224
225			return $fileObject->fread($length);
226			}
227
228			/**
229			* Resolves circular references in page objects.
230			*/
231			private function resolveCircularReferences()
232			{
233			$externalReferenceMap = new SplObjectStorage();
234
235			foreach ($this->objects as $id => $object) {
236			if (!$object instanceof Page \|\| null === $object->getIndirectReference()) {
237			continue;
238			}
239
240			$indirectObject = $object->getIndirectReference();
241			$objectStorage = $indirectObject->getObjectStorage();
242			$generation = $indirectObject->getGeneration();
243
244			if (!$externalReferenceMap->contains($objectStorage)) {
245			$externalReferenceMap->attach($objectStorage, []);
246			}
247
248			if (!array_key_exists($generation, $externalReferenceMap[$objectStorage])) {
249			$externalReferenceMap[$objectStorage][$generation] = [];
250			}
251
252			$externalReferenceMap[$objectStorage][$generation][$id] = new IndirectObject($id, 0, $this->objects);
253			}
254
255			$stack = [];
256			$this->sweepIndirectReferences($externalReferenceMap, $this->root, $stack);
257			}
258
259			/**
260			* @param SplObjectStorage $externalReferenceMap
261			* @param ObjectInterface $object
262			* @param array $stack
263			* @return ObjectInterface
264			*/
265			private function sweepIndirectReferences(
266			SplObjectStorage $externalReferenceMap,
267			ObjectInterface $object,
268			array &$stack
269			) {
270			if ($object instanceof DictionaryObject \|\| $object instanceof ArrayObject) {
271			foreach ($object as $index => $childObject) {
272			$childObject = $this->sweepIndirectReferences($externalReferenceMap, $childObject, $stack);
273
274			if ($childObject instanceof StreamObject) {
275			$childObject = $this->objects->addObject($childObject);
276			}
277
278			$object[$index] = $childObject;
279			}
280
281			return $object;
282			}
283
284			if ($object instanceof IndirectObject) {
285			$objectStorage = $object->getObjectStorage();
286
287			if ($objectStorage === $this->objects) {
288			if (in_array($object->getId(), $stack)) {
289			return $object;
290			}
291
292			$stack[] = $object->getId();
293			$this->sweepIndirectReferences($externalReferenceMap, $this->objects->getObject($object), $stack);
294
295			return $object;
296			}
297
298			$id = $object->getId();
299			$generation = $object->getGeneration();
300
301			if (!$externalReferenceMap->contains($objectStorage)) {
302			$externalReferenceMap->attach($objectStorage, []);
303			}
304
305			$map = $externalReferenceMap[$objectStorage];
306
307			if (isset($externalReferenceMap[$objectStorage][$generation][$id])) {
308			return $map[$generation][$id];
309			}
310
311			$newObject = $objectStorage->getObject($object);
312			$newId = $this->objects->reserveSlot();
313			$newIndirectObject = new IndirectObject($newId, 0, $this->objects);
314
315			if (!array_key_exists($generation, $externalReferenceMap[$objectStorage])) {
316			$externalReferenceMap[$objectStorage][$generation] = [];
317			}
318
319			$externalReferenceMap[$objectStorage][$generation][$id] = $newIndirectObject;
320			$sweepedIndirectObject = $this->sweepIndirectReferences($externalReferenceMap, $newObject, $stack);
321
322			if (!$sweepedIndirectObject instanceof IndirectObject) {
323			throw new UnexpectedValueException(sprintf(
324			'Expected sweeped object to be of type %s, got %s',
325			IndirectObject::class,
326			get_class($sweepedIndirectObject)
327			));
328			}
329
330			$this->objects->fillSlot($sweepedIndirectObject);
331
332			return $newIndirectObject;
333			}
334
335			return $object;
336			}
337
338			/**
339			* Writes the file header.
340			*
341			* @param SplFileObject $fileObject
342			*/
343			private function writeHeader(SplFileObject $fileObject)
344			{
345			$fileObject->fwrite(sprintf("%PDF-%s\n", $this->version));
346			$fileObject->fwrite("%\xff\xff\xff\xff\n");
347			}
348
349			/**
350			* Writes all objects.
351			*
352			* @param SplFileObject $fileObject
353			* @return array
354			*/
355			private function writeObjects(SplFileObject $fileObject)
356			{
357			$objectOffsets = [];
358
359			foreach ($this->objects as $object) {
360			$indirectObject = $this->objects->getIndirectObject($object);
361			$id = $indirectObject->getId();
362			$objectOffsets[] = $fileObject->ftell();
363			$fileObject->fwrite(sprintf("%d 0 obj\n", $id));
364
365			$key = null;
366
367			if (null !== $this->encrypt && $id !== $this->encrypt->getId()) {
368			$key = substr(hex2bin(md5(
369			$this->encryptionKey
370			. substr(pack('V', $id), 0, 3)
371			. substr(pack('V', $indirectObject->getGeneration()), 0, 2)
372			)), 0, min(16, strlen($this->encryptionKey) + 5));
373			}
374
375			$object->writeToStream($fileObject, $key);
376			$fileObject->fwrite("\nendobj\n");
377			}
378
379			return $objectOffsets;
380			}
381
382			/**
383			* Writes the xref table.
384			*
385			* @param SplFileObject $fileObject
386			* @param array $objectOffsets
387			*/
388			private function writeXrefTable(SplFileObject $fileObject, array $objectOffsets)
389			{
390			$fileObject->fwrite("xref\n");
391			$fileObject->fwrite(sprintf("0 %d\n", count($this->objects) + 1));
392			$fileObject->fwrite(sprintf("%010d %05d f \n", 0, 65535));
393
394			foreach ($objectOffsets as $offset) {
395			$fileObject->fwrite(sprintf("%010d %05d n \n", $offset, 0));
396			}
397			}
398
399			/**
400			* Writes the trailer.
401			*
402			* @param SplFileObject $fileObject
403			*/
404			private function writeTrailer(SplFileObject $fileObject)
405			{
406			$fileObject->fwrite("trailer\n");
407			$trailer = new DictionaryObject();
			0 ignored issues – show Bug introduced 2015-11-28 01:18 UTC by Report Bug Copy Issue Report The call to `DictionaryObject::__construct()` misses a required argument `$objects`. This check looks for function calls that miss required arguments. Loading history...
408			$trailer['Size'] = new NumericObject(count($this->objects) + 1);
409			$trailer['Root'] = $this->root;
410			$trailer['Info'] = $this->info;
411			$trailer['Id'] = new ArrayObject([$this->firstId, $this->secondId]);
412			$trailer->writeToStream($fileObject, null);
413			}
414
415			/**
416			* Writes the file footer.
417			*
418			* @param SplFileObject $fileObject
419			* @param int $xrefOffset
420			*/
421			private function writeFooter(SplFileObject $fileObject, $xrefOffset)
422			{
423			$fileObject->fwrite("\n");
424			$fileObject->fwrite("startxref\n");
425			$fileObject->fwrite(sprintf("%d\n", $xrefOffset));
426			$fileObject->fwrite("%%%EOF\n");
427			}
428
429			/**
430			* Computes a file identifier.
431			*
432			* @return string
433			*/
434			private function generateFileIdentifier()
435			{
436			return hex2bin(md5(microtime()));
437			}
438			}
439

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