AbstractCsv::__clone() - Code Metrics - Inspection of "Prepare 9.2.0 release" - thephpleague/csv - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( a327ab...c6c647 )

by ignace nyamagana

created 2018-12-14 10:59 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).
 *
 * (c) Ignace Nyamagana Butera <[email protected]>
 *
 * 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 function filter_var;
use function mb_strlen;
use function rawurlencode;
use function sprintf;
use function str_replace;
use function str_split;
use function strcspn;
use function strlen;
use const FILTER_FLAG_STRIP_HIGH;
use const FILTER_FLAG_STRIP_LOW;
use const FILTER_SANITIZE_STRING;

/**
 * An abstract class to enable CSV document loading.
 */
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();
    }

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

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

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

    /**
     * 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 pathname of the underlying document.
     */
    public function getPathname(): string
    {
        return $this->document->getPathname();
    }

    /**
     * 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->rewind();
        $this->input_bom = bom_match((string) $this->document->fread(4));

        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));
    }

    /**
     * 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 ('' === $escape || 1 === strlen($escape)) {
            $this->escape = $escape;
            $this->resetProperties();

            return $this;
        }

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

thephpleague / csv

Push — master ( a327ab...c6c647 )

AbstractCsv::__clone() A

Complexity

Size

Duplication

Code Coverage

Importance

Duplication Side-by-Side

Filter issues like