AbstractCsv::__clone() - Code Metrics - Inspection of "bug fix #307" - thephpleague/csv - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#309)

by ignace nyamagana

created 2018-09-10 07:56 UTC

AbstractCsv::__clone() A

↳ Parent: AbstractCsv

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes

Metric	Value
cc	1
nc	1
nop	0
dl	0
loc	4
ccs	2
cts	2
cp	1
crap	1
rs	10
c	0
b	0
f	0

<?php

/**
 * League.Csv (https://csv.thephpleague.com).
 *
 * @author  Ignace Nyamagana Butera <[email protected]>
 * @license https://github.com/thephpleague/csv/blob/master/LICENSE (MIT License)
 * @version 9.1.5
 * @link    https://github.com/thephpleague/csv
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

declare(strict_types=1);

namespace League\Csv;

use Generator;
use SplFileObject;
use const FILTER_FLAG_STRIP_HIGH;
use const FILTER_FLAG_STRIP_LOW;
use const FILTER_SANITIZE_STRING;
use function filter_var;
use function get_class;
use function implode;
use function mb_strlen;
use function rawurlencode;
use function sprintf;
use function str_replace;
use function str_split;
use function strcspn;
use function strlen;

/**
 * An abstract class to enable CSV document loading.
 *
 * @package League.csv
 * @since   4.0.0
 * @author  Ignace Nyamagana Butera <[email protected]>
 */
abstract class AbstractCsv implements ByteSequence
{
    /**
     * The stream filter mode (read or write).
     *
     * @var int
     */
    protected $stream_filter_mode;


    /**
     * collection of stream filters.
     *
     * @var bool[]
     */
    protected $stream_filters = [];

    /**
     * The CSV document BOM sequence.
     *
     * @var string|null
     */
    protected $input_bom = null;

    /**
     * The Output file BOM character.
     *
     * @var string
     */
    protected $output_bom = '';

    /**
     * the field delimiter (one character only).
     *
     * @var string
     */
    protected $delimiter = ',';

    /**
     * the field enclosure character (one character only).
     *
     * @var string
     */
    protected $enclosure = '"';

    /**
     * the field escape character (one character only).
     *
     * @var string
     */
    protected $escape = '\\';

    /**
     * The CSV document.
     *
     * @var SplFileObject|Stream
     */
    protected $document;

    /**
     * New instance.
     *
     * @param SplFileObject|Stream $document The CSV Object instance
     */
    protected function __construct($document)
    {
        $this->document = $document;
        list($this->delimiter, $this->enclosure, $this->escape) = $this->document->getCsvControl();
        $this->resetProperties();
    }

    /**
     * {@inheritdoc}
     */
    public function __destruct()
    {
        unset($this->document);
    }

    /**
     * {@inheritdoc}
     */
    public function __clone()
    {
        throw new Exception(sprintf('An object of class %s cannot be cloned', get_class($this)));
    }

    /**
     * Return a new instance from a SplFileObject.
     *
     * @return static
     */
    public static function createFromFileObject(SplFileObject $file)
    {
        return new static($file);
    }

    /**
     * Return a new instance from a PHP resource stream.
     *
     * @param resource $stream
     *
     * @return static
     */
    public static function createFromStream($stream)
    {
        return new static(new Stream($stream));
    }

    /**
     * Return a new instance from a string.
     *
     * @return static
     */
    public static function createFromString(string $content)
    {
        return new static(Stream::createFromString($content));
    }

    /**
     * Return a new instance from a file path.
     *
     * @param resource|null $context the resource context
     *
     * @return static
     */
    public static function createFromPath(string $path, string $open_mode = 'r+', $context = null)
    {
        return new static(Stream::createFromPath($path, $open_mode, $context));
    }

    /**
     * Returns the current field delimiter.
     */
    public function getDelimiter(): string
    {
        return $this->delimiter;
    }

    /**
     * Returns the current field enclosure.
     */
    public function getEnclosure(): string
    {
        return $this->enclosure;
    }

    /**
     * Returns the current field escape character.
     */
    public function getEscape(): string
    {
        return $this->escape;
    }

    /**
     * Returns the BOM sequence in use on Output methods.
     */
    public function getOutputBOM(): string
    {
        return $this->output_bom;
    }

    /**
     * Returns the BOM sequence of the given CSV.
     */
    public function getInputBOM(): string
    {
        if (null !== $this->input_bom) {
            return $this->input_bom;
        }

        $this->document->setFlags(SplFileObject::READ_CSV);
        $this->document->setCsvControl($this->delimiter, $this->enclosure, $this->escape);
        $this->document->rewind();
        $this->input_bom = bom_match(implode(',', (array) $this->document->current()));

        return $this->input_bom;
    }

    /**
     * Returns the stream filter mode.
     */
    public function getStreamFilterMode(): int
    {
        return $this->stream_filter_mode;
    }

    /**
     * Tells whether the stream filter capabilities can be used.
     */
    public function supportsStreamFilter(): bool
    {
        return $this->document instanceof Stream;
    }

    /**
     * Tell whether the specify stream filter is attach to the current stream.
     */
    public function hasStreamFilter(string $filtername): bool
    {
        return $this->stream_filters[$filtername] ?? false;
    }

    /**
     * Retuns the CSV document as a Generator of string chunk.
     *
     * @param int $length number of bytes read
     *
     * @throws Exception if the number of bytes is lesser than 1
     */
    public function chunk(int $length): Generator
    {
        if ($length < 1) {
            throw new Exception(sprintf('%s() expects the length to be a positive integer %d given', __METHOD__, $length));
        }

        $input_bom = $this->getInputBOM();
        $this->document->rewind();
        $this->document->fseek(strlen($input_bom));
        foreach (str_split($this->output_bom.$this->document->fread($length), $length) as $chunk) {
            yield $chunk;
        }

        while ($this->document->valid()) {
            yield $this->document->fread($length);
        }
    }

    /**
     * DEPRECATION WARNING! This method will be removed in the next major point release.
     *
     * @deprecated deprecated since version 9.1.0
     * @see AbstractCsv::getContent
     *
     * Retrieves the CSV content
     */
    public function __toString(): string
    {
        return $this->getContent();
    }

    /**
     * Retrieves the CSV content.
     */
    public function getContent(): string
    {
        $raw = '';
        foreach ($this->chunk(8192) as $chunk) {
            $raw .= $chunk;
        }

        return $raw;
    }

    /**
     * Outputs all data on the CSV file.
     *
     *
     * @return int Returns the number of characters read from the handle
     *             and passed through to the output.
     */
    public function output(string $filename = null): int
    {
        if (null !== $filename) {
            $this->sendHeaders($filename);
        }
        $input_bom = $this->getInputBOM();
        $this->document->rewind();
        $this->document->fseek(strlen($input_bom));
        echo $this->output_bom;

        return strlen($this->output_bom) + $this->document->fpassthru();
    }

    /**
     * Send the CSV headers.
     *
     * Adapted from Symfony\Component\HttpFoundation\ResponseHeaderBag::makeDisposition
     *
     * @throws Exception if the submitted header is invalid according to RFC 6266
     *
     * @see https://tools.ietf.org/html/rfc6266#section-4.3
     */
    protected function sendHeaders(string $filename)
    {
        if (strlen($filename) != strcspn($filename, '\\/')) {
            throw new Exception('The filename cannot contain the "/" and "\\" characters.');
        }

        $flag = FILTER_FLAG_STRIP_LOW;
        if (strlen($filename) !== mb_strlen($filename)) {
            $flag |= FILTER_FLAG_STRIP_HIGH;
        }

        $filenameFallback = str_replace('%', '', filter_var($filename, FILTER_SANITIZE_STRING, $flag));

        $disposition = sprintf('attachment; filename="%s"', str_replace('"', '\\"', $filenameFallback));
        if ($filename !== $filenameFallback) {
            $disposition .= sprintf("; filename*=utf-8''%s", rawurlencode($filename));
        }

        header('Content-Type: text/csv');
        header('Content-Transfer-Encoding: binary');
        header('Content-Description: File Transfer');
        header('Content-Disposition: '.$disposition);
    }

    /**
     * Sets the field delimiter.
     *
     * @throws Exception If the Csv control character is not one character only.
     *
     * @return static
     */
    public function setDelimiter(string $delimiter): self
    {
        if ($delimiter === $this->delimiter) {
            return $this;
        }

        if (1 === strlen($delimiter)) {
            $this->delimiter = $delimiter;
            $this->resetProperties();

            return $this;
        }

        throw new Exception(sprintf('%s() expects delimiter to be a single character %s given', __METHOD__, $delimiter));
    }

    /**
     * Reset dynamic object properties to improve performance.
     */
    protected function resetProperties()
    {
    }

    /**
     * Sets the field enclosure.
     *
     * @throws Exception If the Csv control character is not one character only.
     *
     * @return static
     */
    public function setEnclosure(string $enclosure): self
    {
        if ($enclosure === $this->enclosure) {
            return $this;
        }

        if (1 === strlen($enclosure)) {
            $this->enclosure = $enclosure;
            $this->resetProperties();

            return $this;
        }

        throw new Exception(sprintf('%s() expects enclosure to be a single character %s given', __METHOD__, $enclosure));
    }

    /**
     * Sets the field escape character.
     *
     * @throws Exception If the Csv control character is not one character only.
     *
     * @return static
     */
    public function setEscape(string $escape): self
    {
        if ($escape === $this->escape) {
            return $this;
        }

        if (1 === strlen($escape)) {
            $this->escape = $escape;
            $this->resetProperties();

            return $this;
        }

        throw new Exception(sprintf('%s() expects escape to be a single character %s given', __METHOD__, $escape));
    }

    /**
     * Sets the BOM sequence to prepend the CSV on output.
     *
     * @return static
     */
    public function setOutputBOM(string $str): self
    {
        $this->output_bom = $str;

        return $this;
    }

    /**
     * append a stream filter.
     *
     * @param null|mixed $params
     *
     * @throws Exception If the stream filter API can not be used
     *
     * @return static
     */
    public function addStreamFilter(string $filtername, $params = null): self
    {
        if (!$this->document instanceof Stream) {
            throw new Exception('The stream filter API can not be used');
        }

        $this->document->appendFilter($filtername, $this->stream_filter_mode, $params);
        $this->stream_filters[$filtername] = true;
        $this->resetProperties();
        $this->input_bom = null;

        return $this;
    }
}


1		<?php
2
3		/**
4		* League.Csv (https://csv.thephpleague.com).
5		*
6		* @author Ignace Nyamagana Butera <[email protected]>
7		* @license https://github.com/thephpleague/csv/blob/master/LICENSE (MIT License)
8		* @version 9.1.5
9		* @link https://github.com/thephpleague/csv
10		*
11		* For the full copyright and license information, please view the LICENSE
12		* file that was distributed with this source code.
13		*/
14
15		declare(strict_types=1);
16
17		namespace League\Csv;
18
19		use Generator;
20		use SplFileObject;
21		use const FILTER_FLAG_STRIP_HIGH;
22		use const FILTER_FLAG_STRIP_LOW;
23		use const FILTER_SANITIZE_STRING;
24		use function filter_var;
25		use function get_class;
26		use function implode;
27		use function mb_strlen;
28		use function rawurlencode;
29		use function sprintf;
30		use function str_replace;
31		use function str_split;
32		use function strcspn;
33		use function strlen;
34
35		/**
36		* An abstract class to enable CSV document loading.
37		*
38		* @package League.csv
39		* @since 4.0.0
40		* @author Ignace Nyamagana Butera <[email protected]>
41		*/
42		abstract class AbstractCsv implements ByteSequence
43		{
44		/**
45		* The stream filter mode (read or write).
46		*
47		* @var int
48		*/
49		protected $stream_filter_mode;
50
51
52		/**
53		* collection of stream filters.
54		*
55		* @var bool[]
56		*/
57		protected $stream_filters = [];
58
59		/**
60		* The CSV document BOM sequence.
61		*
62		* @var string\|null
63		*/
64		protected $input_bom = null;
65
66		/**
67		* The Output file BOM character.
68		*
69		* @var string
70		*/
71		protected $output_bom = '';
72
73		/**
74		* the field delimiter (one character only).
75		*
76		* @var string
77		*/
78		protected $delimiter = ',';
79
80		/**
81		* the field enclosure character (one character only).
82		*
83		* @var string
84		*/
85		protected $enclosure = '"';
86
87		/**
88		* the field escape character (one character only).
89		*
90		* @var string
91		*/
92		protected $escape = '\\';
93
94		/**
95		* The CSV document.
96		*
97		* @var SplFileObject\|Stream
98		*/
99		protected $document;
100
101		/**
102		* New instance.
103		*
104		* @param SplFileObject\|Stream $document The CSV Object instance
105		*/
106	33	protected function __construct($document)
107		{
108	33	$this->document = $document;
109	33	list($this->delimiter, $this->enclosure, $this->escape) = $this->document->getCsvControl();
110	33	$this->resetProperties();
111	33	}
112
113		/**
114		* {@inheritdoc}
115		*/
116	36	public function __destruct()
117		{
118	36	unset($this->document);
119	36	}
120
121		/**
122		* {@inheritdoc}
123		*/
124	3	public function __clone()
125		{
126	3	throw new Exception(sprintf('An object of class %s cannot be cloned', get_class($this)));
127		}
128
129		/**
130		* Return a new instance from a SplFileObject.
131		*
132		* @return static
133		*/
134	36	public static function createFromFileObject(SplFileObject $file)
135		{
136	36	return new static($file);
137		}
138
139		/**
140		* Return a new instance from a PHP resource stream.
141		*
142		* @param resource $stream
143		*
144		* @return static
145		*/
146	3	public static function createFromStream($stream)
147		{
148	3	return new static(new Stream($stream));
149		}
150
151		/**
152		* Return a new instance from a string.
153		*
154		* @return static
155		*/
156	6	public static function createFromString(string $content)
157		{
158	6	return new static(Stream::createFromString($content));
159		}
160
161		/**
162		* Return a new instance from a file path.
163		*
164		* @param resource\|null $context the resource context
165		*
166		* @return static
167		*/
168	3	public static function createFromPath(string $path, string $open_mode = 'r+', $context = null)
169		{
170	3	return new static(Stream::createFromPath($path, $open_mode, $context));
171		}
172
173		/**
174		* Returns the current field delimiter.
175		*/
176	15	public function getDelimiter(): string
177		{
178	15	return $this->delimiter;
179		}
180
181		/**
182		* Returns the current field enclosure.
183		*/
184	3	public function getEnclosure(): string
185		{
186	3	return $this->enclosure;
187		}
188
189		/**
190		* Returns the current field escape character.
191		*/
192	3	public function getEscape(): string
193		{
194	3	return $this->escape;
195		}
196
197		/**
198		* Returns the BOM sequence in use on Output methods.
199		*/
200	3	public function getOutputBOM(): string
201		{
202	3	return $this->output_bom;
203		}
204
205		/**
206		* Returns the BOM sequence of the given CSV.
207		*/
208	24	public function getInputBOM(): string
209		{
210	24	if (null !== $this->input_bom) {
211	3	return $this->input_bom;
212		}
213
214	24	$this->document->setFlags(SplFileObject::READ_CSV);
215	24	$this->document->setCsvControl($this->delimiter, $this->enclosure, $this->escape);
216	24	$this->document->rewind();
217	24	$this->input_bom = bom_match(implode(',', (array) $this->document->current()));
218
219	24	return $this->input_bom;
220		}
221
222		/**
223		* Returns the stream filter mode.
224		*/
225	3	public function getStreamFilterMode(): int
226		{
227	3	return $this->stream_filter_mode;
228		}
229
230		/**
231		* Tells whether the stream filter capabilities can be used.
232		*/
233	6	public function supportsStreamFilter(): bool
234		{
235	6	return $this->document instanceof Stream;
236		}
237
238		/**
239		* Tell whether the specify stream filter is attach to the current stream.
240		*/
241	3	public function hasStreamFilter(string $filtername): bool
242		{
243	3	return $this->stream_filters[$filtername] ?? false;
244		}
245
246		/**
247		* Retuns the CSV document as a Generator of string chunk.
248		*
249		* @param int $length number of bytes read
250		*
251		* @throws Exception if the number of bytes is lesser than 1
252		*/
253	15	public function chunk(int $length): Generator
254		{
255	15	if ($length < 1) {
256	3	throw new Exception(sprintf('%s() expects the length to be a positive integer %d given', __METHOD__, $length));
257		}
258
259	12	$input_bom = $this->getInputBOM();
260	12	$this->document->rewind();
261	12	$this->document->fseek(strlen($input_bom));
262	12	foreach (str_split($this->output_bom.$this->document->fread($length), $length) as $chunk) {
263	12	yield $chunk;
264		}
265
266	12	while ($this->document->valid()) {
267	7	yield $this->document->fread($length);
268		}
269	12	}
270
271		/**
272		* DEPRECATION WARNING! This method will be removed in the next major point release.
273		*
274		* @deprecated deprecated since version 9.1.0
275		* @see AbstractCsv::getContent
276		*
277		* Retrieves the CSV content
278		*/
279	3	public function __toString(): string
280		{
281	3	return $this->getContent();
282		}
283
284		/**
285		* Retrieves the CSV content.
286		*/
287	18	public function getContent(): string
288		{
289	18	$raw = '';
290	18	foreach ($this->chunk(8192) as $chunk) {
291	18	$raw .= $chunk;
292		}
293
294	18	return $raw;
295		}
296
297		/**
298		* Outputs all data on the CSV file.
299		*
300		*
301		* @return int Returns the number of characters read from the handle
302		* and passed through to the output.
303		*/
304	9	public function output(string $filename = null): int
305		{
306	9	if (null !== $filename) {
307	9	$this->sendHeaders($filename);
308		}
309	6	$input_bom = $this->getInputBOM();
310	6	$this->document->rewind();
311	6	$this->document->fseek(strlen($input_bom));
312	6	echo $this->output_bom;
313
314	6	return strlen($this->output_bom) + $this->document->fpassthru();
315		}
316
317		/**
318		* Send the CSV headers.
319		*
320		* Adapted from Symfony\Component\HttpFoundation\ResponseHeaderBag::makeDisposition
321		*
322		* @throws Exception if the submitted header is invalid according to RFC 6266
323		*
324		* @see https://tools.ietf.org/html/rfc6266#section-4.3
325		*/
326	9	protected function sendHeaders(string $filename)
327		{
328	9	if (strlen($filename) != strcspn($filename, '\\/')) {
329	3	throw new Exception('The filename cannot contain the "/" and "\\" characters.');
330		}
331
332	6	$flag = FILTER_FLAG_STRIP_LOW;
333	6	if (strlen($filename) !== mb_strlen($filename)) {
334	3	$flag \|= FILTER_FLAG_STRIP_HIGH;
335		}
336
337	6	$filenameFallback = str_replace('%', '', filter_var($filename, FILTER_SANITIZE_STRING, $flag));
338
339	6	$disposition = sprintf('attachment; filename="%s"', str_replace('"', '\\"', $filenameFallback));
340	6	if ($filename !== $filenameFallback) {
341	3	$disposition .= sprintf("; filename*=utf-8''%s", rawurlencode($filename));
342		}
343
344	6	header('Content-Type: text/csv');
345	6	header('Content-Transfer-Encoding: binary');
346	6	header('Content-Description: File Transfer');
347	6	header('Content-Disposition: '.$disposition);
348	6	}
349
350		/**
351		* Sets the field delimiter.
352		*
353		* @throws Exception If the Csv control character is not one character only.
354		*
355		* @return static
356		*/
357	18	public function setDelimiter(string $delimiter): self
358		{
359	18	if ($delimiter === $this->delimiter) {
360	9	return $this;
361		}
362
363	15	if (1 === strlen($delimiter)) {
364	15	$this->delimiter = $delimiter;
365	15	$this->resetProperties();
366
367	15	return $this;
368		}
369
370	3	throw new Exception(sprintf('%s() expects delimiter to be a single character %s given', __METHOD__, $delimiter));
371		}
372
373		/**
374		* Reset dynamic object properties to improve performance.
375		*/
376		protected function resetProperties()
377		{
378		}
379
380		/**
381		* Sets the field enclosure.
382		*
383		* @throws Exception If the Csv control character is not one character only.
384		*
385		* @return static
386		*/
387	3	public function setEnclosure(string $enclosure): self
388		{
389	3	if ($enclosure === $this->enclosure) {
390	3	return $this;
391		}
392
393	3	if (1 === strlen($enclosure)) {
394	3	$this->enclosure = $enclosure;
395	3	$this->resetProperties();
396
397	3	return $this;
398		}
399
400	3	throw new Exception(sprintf('%s() expects enclosure to be a single character %s given', __METHOD__, $enclosure));
401		}
402
403		/**
404		* Sets the field escape character.
405		*
406		* @throws Exception If the Csv control character is not one character only.
407		*
408		* @return static
409		*/
410	3	public function setEscape(string $escape): self
411		{
412	3	if ($escape === $this->escape) {
413	3	return $this;
414		}
415
416	3	if (1 === strlen($escape)) {
417	3	$this->escape = $escape;
418	3	$this->resetProperties();
419
420	3	return $this;
421		}
422
423	3	throw new Exception(sprintf('%s() expects escape to be a single character %s given', __METHOD__, $escape));
424		}
425
426		/**
427		* Sets the BOM sequence to prepend the CSV on output.
428		*
429		* @return static
430		*/
431	9	public function setOutputBOM(string $str): self
432		{
433	9	$this->output_bom = $str;
434
435	9	return $this;
436		}
437
438		/**
439		* append a stream filter.
440		*
441		* @param null\|mixed $params
442		*
443		* @throws Exception If the stream filter API can not be used
444		*
445		* @return static
446		*/
447	15	public function addStreamFilter(string $filtername, $params = null): self
448		{
449	15	if (!$this->document instanceof Stream) {
450	3	throw new Exception('The stream filter API can not be used');
451		}
452
453	12	$this->document->appendFilter($filtername, $this->stream_filter_mode, $params);
454	9	$this->stream_filters[$filtername] = true;
455	9	$this->resetProperties();
456	9	$this->input_bom = null;
457
458	9	return $this;
459		}
460		}
461

thephpleague / csv

Pull Request — master (#309)

AbstractCsv::__clone() A

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