Writer::convertField() - 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

Writer::convertField() A

↳ Parent: Writer

Complexity

Conditions	2
Paths	2

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	7
CRAP Score	2

Importance

Changes

Metric	Value
cc	2
nc	2
nop	1
dl	0
loc	12
ccs	7
cts	7
cp	1
crap	2
rs	9.8666
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 Traversable;
use TypeError;
use const SEEK_CUR;
use const STREAM_FILTER_WRITE;
use function array_map;
use function array_reduce;
use function gettype;
use function implode;
use function is_iterable;
use function sprintf;
use function str_replace;
use function strlen;

/**
 * A class to insert records into a CSV Document.
 *
 * @package League.csv
 * @since   4.0.0
 * @author  Ignace Nyamagana Butera <[email protected]>
 */
class Writer extends AbstractCsv
{
    const MODE_PHP = 'MODE_PHP';

    const MODE_RFC4180 = 'MODE_RFC4180';

    /**
     * callable collection to format the record before insertion.
     *
     * @var callable[]
     */
    protected $formatters = [];

    /**
     * callable collection to validate the record before insertion.
     *
     * @var callable[]
     */
    protected $validators = [];

    /**
     * newline character.
     *
     * @var string
     */
    protected $newline = "\n";

    /**
     * Insert records count for flushing.
     *
     * @var int
     */
    protected $flush_counter = 0;

    /**
     * Buffer flush threshold.
     *
     * @var int|null
     */
    protected $flush_threshold;

    /**
     * {@inheritdoc}
     */
    protected $stream_filter_mode = STREAM_FILTER_WRITE;

    /**
     * Regular expression used to detect if enclosure are necessary or not.
     *
     * @var string
     */
    protected $rfc4180_regexp;

    /**
     * Returns the current newline sequence characters.
     */
    public function getNewline(): string
    {
        return $this->newline;
    }

    /**
     * Get the flush threshold.
     *
     * @return int|null
     */
    public function getFlushThreshold()
    {
        return $this->flush_threshold;
    }

    /**
     * Adds multiple records to the CSV document.
     *
     * @see Writer::insertOne
     *
     * @param Traversable|array $records
     */
    public function insertAll($records, string $mode = self::MODE_PHP): int
    {
        if (!is_iterable($records)) {
            throw new TypeError(sprintf('%s() expects argument passed to be iterable, %s given', __METHOD__, gettype($records)));
        }

        $bytes = 0;
        foreach ($records as $record) {
            $bytes += $this->insertOne($record, $mode);
        }

        $this->flush_counter = 0;
        $this->document->fflush();

        return $bytes;
    }

    /**
     * Adds a single record to a CSV document.
     *
     * A record is an array that can contains scalar types values, NULL values
     * or objects implementing the __toString method.
     *
     * @throws CannotInsertRecord If the record can not be inserted
     */
    public function insertOne(array $record, string $mode = self::MODE_PHP): int
    {
        static $method = [self::MODE_PHP => 'fputcsvPHP', self::MODE_RFC4180 => 'fputcsvRFC4180'];
        if (!isset($method[$mode])) {
            throw new Exception(sprintf('Unknown or unsupported writing mode %s', $mode));
        }

        $record = array_reduce($this->formatters, [$this, 'formatRecord'], $record);
        $this->validateRecord($record);
        $bytes = $this->{$method[$mode]}($record);
        if (false !== $bytes && 0 !== $bytes) {
            return $bytes + $this->consolidate();
        }

        throw CannotInsertRecord::triggerOnInsertion($record);
    }

    /**
     * Adds a single record to a CSV Document using PHP algorithm.
     */
    protected function fputcsvPHP(array $record)
    {
        return $this->document->fputcsv($record, $this->delimiter, $this->enclosure, $this->escape);
    }

    /**
     * Adds a single record to a CSV Document using RFC4180 algorithm.
     */
    protected function fputcsvRFC4180(array $record)
    {
        return $this->document->fwrite(implode($this->delimiter, array_map([$this, 'convertField'], $record))."\n");
    }

    /**
     * Converts and Format a record field to be inserted into a CSV Document.
     *
     * @see https://tools.ietf.org/html/rfc4180
     */
    protected function convertField($field): string
    {
        $field = (string) $field;
        if (!preg_match($this->rfc4180_regexp, $field)) {
            return $field;
        }

        return $this->enclosure
            .str_replace($this->enclosure, $this->enclosure.$this->enclosure, $field)
            .$this->enclosure
        ;
    }

    /**
     * Format a record.
     *
     * The returned array must contain
     *   - scalar types values,
     *   - NULL values,
     *   - or objects implementing the __toString() method.
     */
    protected function formatRecord(array $record, callable $formatter): array
    {
        return $formatter($record);
    }

    /**
     * Validate a record.
     *
     * @throws CannotInsertRecord If the validation failed
     */
    protected function validateRecord(array $record)
    {
        foreach ($this->validators as $name => $validator) {
            if (true !== $validator($record)) {
                throw CannotInsertRecord::triggerOnValidation($name, $record);
            }
        }
    }

    /**
     * Apply post insertion actions.
     */
    protected function consolidate(): int
    {
        $bytes = 0;
        if ("\n" !== $this->newline) {
            $this->document->fseek(-1, SEEK_CUR);
            $bytes = $this->document->fwrite($this->newline, strlen($this->newline)) - 1;
        }

        if (null === $this->flush_threshold) {
            return $bytes;
        }

        ++$this->flush_counter;
        if (0 === $this->flush_counter % $this->flush_threshold) {
            $this->flush_counter = 0;
            $this->document->fflush();
        }

        return $bytes;
    }

    /**
     * Adds a record formatter.
     */
    public function addFormatter(callable $formatter): self
    {
        $this->formatters[] = $formatter;

        return $this;
    }

    /**
     * Adds a record validator.
     */
    public function addValidator(callable $validator, string $validator_name): self
    {
        $this->validators[$validator_name] = $validator;

        return $this;
    }

    /**
     * Sets the newline sequence.
     */
    public function setNewline(string $newline): self
    {
        $this->newline = $newline;

        return $this;
    }

    /**
     * Reset dynamic object properties to improve performance.
     */
    protected function resetProperties()
    {
        $this->rfc4180_regexp = "/[\n|\r"
            .preg_quote($this->delimiter, '/')
            .'|'
            .preg_quote($this->enclosure, '/')
        .']/';
    }

    /**
     * Set the flush threshold.
     *
     * @param int|null $threshold
     *
     * @throws Exception if the threshold is a integer lesser than 1
     */
    public function setFlushThreshold($threshold): self
    {
        if ($threshold === $this->flush_threshold) {
            return $this;
        }

        if (!is_nullable_int($threshold)) {
            throw new TypeError(sprintf(__METHOD__.'() expects 1 Argument to be null or an integer %s given', gettype($threshold)));
        }

        if (null !== $threshold && 1 > $threshold) {
            throw new Exception(__METHOD__.'() expects 1 Argument to be null or a valid integer greater or equal to 1');
        }

        $this->flush_threshold = $threshold;
        $this->flush_counter = 0;
        $this->document->fflush();

        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 Traversable;
20		use TypeError;
21		use const SEEK_CUR;
22		use const STREAM_FILTER_WRITE;
23		use function array_map;
24		use function array_reduce;
25		use function gettype;
26		use function implode;
27		use function is_iterable;
28		use function sprintf;
29		use function str_replace;
30		use function strlen;
31
32		/**
33		* A class to insert records into a CSV Document.
34		*
35		* @package League.csv
36		* @since 4.0.0
37		* @author Ignace Nyamagana Butera <[email protected]>
38		*/
39		class Writer extends AbstractCsv
40		{
41		const MODE_PHP = 'MODE_PHP';
42
43		const MODE_RFC4180 = 'MODE_RFC4180';
44
45		/**
46		* callable collection to format the record before insertion.
47		*
48		* @var callable[]
49		*/
50		protected $formatters = [];
51
52		/**
53		* callable collection to validate the record before insertion.
54		*
55		* @var callable[]
56		*/
57		protected $validators = [];
58
59		/**
60		* newline character.
61		*
62		* @var string
63		*/
64		protected $newline = "\n";
65
66		/**
67		* Insert records count for flushing.
68		*
69		* @var int
70		*/
71		protected $flush_counter = 0;
72
73		/**
74		* Buffer flush threshold.
75		*
76		* @var int\|null
77		*/
78		protected $flush_threshold;
79
80		/**
81		* {@inheritdoc}
82		*/
83		protected $stream_filter_mode = STREAM_FILTER_WRITE;
84
85		/**
86		* Regular expression used to detect if enclosure are necessary or not.
87		*
88		* @var string
89		*/
90		protected $rfc4180_regexp;
91
92		/**
93		* Returns the current newline sequence characters.
94		*/
95	3	public function getNewline(): string
96		{
97	3	return $this->newline;
98		}
99
100		/**
101		* Get the flush threshold.
102		*
103		* @return int\|null
104		*/
105	3	public function getFlushThreshold()
106		{
107	3	return $this->flush_threshold;
108		}
109
110		/**
111		* Adds multiple records to the CSV document.
112		*
113		* @see Writer::insertOne
114		*
115		* @param Traversable\|array $records
116		*/
117	9	public function insertAll($records, string $mode = self::MODE_PHP): int
118		{
119	9	if (!is_iterable($records)) {
120	3	throw new TypeError(sprintf('%s() expects argument passed to be iterable, %s given', __METHOD__, gettype($records)));
121		}
122
123	6	$bytes = 0;
124	6	foreach ($records as $record) {
125	6	$bytes += $this->insertOne($record, $mode);
126		}
127
128	6	$this->flush_counter = 0;
129	6	$this->document->fflush();
130
131	6	return $bytes;
132		}
133
134		/**
135		* Adds a single record to a CSV document.
136		*
137		* A record is an array that can contains scalar types values, NULL values
138		* or objects implementing the __toString method.
139		*
140		* @throws CannotInsertRecord If the record can not be inserted
141		*/
142	48	public function insertOne(array $record, string $mode = self::MODE_PHP): int
143		{
144	48	static $method = [self::MODE_PHP => 'fputcsvPHP', self::MODE_RFC4180 => 'fputcsvRFC4180'];
145	48	if (!isset($method[$mode])) {
146	3	throw new Exception(sprintf('Unknown or unsupported writing mode %s', $mode));
147		}
148
149	45	$record = array_reduce($this->formatters, [$this, 'formatRecord'], $record);
150	45	$this->validateRecord($record);
151	42	$bytes = $this->{$method[$mode]}($record);
152	42	if (false !== $bytes && 0 !== $bytes) {
153	36	return $bytes + $this->consolidate();
154		}
155
156	6	throw CannotInsertRecord::triggerOnInsertion($record);
157		}
158
159		/**
160		* Adds a single record to a CSV Document using PHP algorithm.
161		*/
162	9	protected function fputcsvPHP(array $record)
163		{
164	9	return $this->document->fputcsv($record, $this->delimiter, $this->enclosure, $this->escape);
165		}
166
167		/**
168		* Adds a single record to a CSV Document using RFC4180 algorithm.
169		*/
170	18	protected function fputcsvRFC4180(array $record)
171		{
172	18	return $this->document->fwrite(implode($this->delimiter, array_map([$this, 'convertField'], $record))."\n");
173		}
174
175		/**
176		* Converts and Format a record field to be inserted into a CSV Document.
177		*
178		* @see https://tools.ietf.org/html/rfc4180
179		*/
180	18	protected function convertField($field): string
181		{
182	18	$field = (string) $field;
183	18	if (!preg_match($this->rfc4180_regexp, $field)) {
184	15	return $field;
185		}
186
187	15	return $this->enclosure
188	15	.str_replace($this->enclosure, $this->enclosure.$this->enclosure, $field)
189	15	.$this->enclosure
190		;
191		}
192
193		/**
194		* Format a record.
195		*
196		* The returned array must contain
197		* - scalar types values,
198		* - NULL values,
199		* - or objects implementing the __toString() method.
200		*/
201	3	protected function formatRecord(array $record, callable $formatter): array
202		{
203	3	return $formatter($record);
204		}
205
206		/**
207		* Validate a record.
208		*
209		* @throws CannotInsertRecord If the validation failed
210		*/
211	12	protected function validateRecord(array $record)
212		{
213	12	foreach ($this->validators as $name => $validator) {
214	3	if (true !== $validator($record)) {
215	3	throw CannotInsertRecord::triggerOnValidation($name, $record);
216		}
217		}
218	9	}
219
220		/**
221		* Apply post insertion actions.
222		*/
223	12	protected function consolidate(): int
224		{
225	12	$bytes = 0;
226	12	if ("\n" !== $this->newline) {
227	3	$this->document->fseek(-1, SEEK_CUR);
228	3	$bytes = $this->document->fwrite($this->newline, strlen($this->newline)) - 1;
229		}
230
231	12	if (null === $this->flush_threshold) {
232	9	return $bytes;
233		}
234
235	3	++$this->flush_counter;
236	3	if (0 === $this->flush_counter % $this->flush_threshold) {
237	3	$this->flush_counter = 0;
238	3	$this->document->fflush();
239		}
240
241	3	return $bytes;
242		}
243
244		/**
245		* Adds a record formatter.
246		*/
247	3	public function addFormatter(callable $formatter): self
248		{
249	3	$this->formatters[] = $formatter;
250
251	3	return $this;
252		}
253
254		/**
255		* Adds a record validator.
256		*/
257	3	public function addValidator(callable $validator, string $validator_name): self
258		{
259	3	$this->validators[$validator_name] = $validator;
260
261	3	return $this;
262		}
263
264		/**
265		* Sets the newline sequence.
266		*/
267	3	public function setNewline(string $newline): self
268		{
269	3	$this->newline = $newline;
270
271	3	return $this;
272		}
273
274		/**
275		* Reset dynamic object properties to improve performance.
276		*/
277	15	protected function resetProperties()
278		{
279	15	$this->rfc4180_regexp = "/[\n\|\r"
280	15	.preg_quote($this->delimiter, '/')
281	15	.'\|'
282	15	.preg_quote($this->enclosure, '/')
283	15	.']/';
284	15	}
285
286		/**
287		* Set the flush threshold.
288		*
289		* @param int\|null $threshold
290		*
291		* @throws Exception if the threshold is a integer lesser than 1
292		*/
293	12	public function setFlushThreshold($threshold): self
294		{
295	12	if ($threshold === $this->flush_threshold) {
296	3	return $this;
297		}
298
299	12	if (!is_nullable_int($threshold)) {
300	3	throw new TypeError(sprintf(__METHOD__.'() expects 1 Argument to be null or an integer %s given', gettype($threshold)));
301		}
302
303	9	if (null !== $threshold && 1 > $threshold) {
304	3	throw new Exception(__METHOD__.'() expects 1 Argument to be null or a valid integer greater or equal to 1');
305		}
306
307	9	$this->flush_threshold = $threshold;
308	9	$this->flush_counter = 0;
309	9	$this->document->fflush();
310
311	9	return $this;
312		}
313		}
314

thephpleague / csv

Pull Request — master (#309)

Writer::convertField() A

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