Csv::read() - Code Metrics - Inspection of "Refactoring" - gplcart/import - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 77ec27...fb3ff4 )

by Iurii

created 2018-02-24 10:15 UTC

Csv::read() D

↳ Parent: Csv

Complexity

Conditions	20
Paths	46

Size

Total Lines	110
Code Lines	74

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	110
rs	4.7294
c	0
b	0
f	0
cc	20
eloc	74
nc	46
nop	0

How to fix Long Method Complexity

<?php

/**
 * @package Import
 * @author Iurii Makukh <[email protected]>
 * @copyright Copyright (c) 2015, Iurii Makukh
 * @license https://www.gnu.org/licenses/gpl.html GNU/GPLv3
 */

namespace gplcart\modules\import\helpers;

use Iterator;
use UnexpectedValueException;

/**
 * Provides methods to read CSV data
 */
class Csv implements Iterator
{

    /**
     * File handler
     * @var resource
     */
    protected $handle;

    /**
     * Current CSV line
     * @var string
     */
    protected $line;

    /**
     * @var int
     */
    protected $key;

    /**
     * Current offset in bytes
     * @var integer
     */
    protected $position;

    /**
     * Total CSV file size in bytes
     * @var integer
     */
    protected $total;

    /**
     * Path to CSV file
     * @var string
     */
    protected $file;

    /**
     * Max number of rows to parse
     * @var integer
     */
    protected $limit;

    /**
     * Final offset in bytes
     * @var integer
     */
    protected $last = 0;

    /**
     * Starting offset in bytes
     * @var integer
     */
    protected $offset = 0;

    /**
     * Array of header names
     * @var array
     */
    protected $header = array();

    /**
     * Skip or not first line
     * @var boolean
     */
    protected $skip_header = false;

    /**
     * CSV delimiter
     * @var string
     */
    protected $delimiter = ",";

    /**
     * Constructor
     */
    public function __construct()
    {
        ini_set('auto_detect_line_endings', true);
    }

    /**
     * Closes file handler
     */
    public function __destruct()
    {
        if (is_resource($this->handle)) {
            fclose($this->handle);
        }
    }

    /**
     * Sets file to parse
     * @param string $file
     * @param integer $filesize
     * @return $this
     */
    public function open($file, $filesize = null)
    {
        $this->handle = fopen($file, 'r');

        if (!is_resource($this->handle)) {
            throw new UnexpectedValueException('Failed to open CSV file');
        }

        $this->file = $file;
        $this->total = isset($filesize) ? (int) $filesize : filesize($file);
        return $this;
    }

    /**
     * Sets max lines to parse
     * @param integer $limit
     * @return $this
     */
    public function setLimit($limit)
    {
        $this->limit = (int) $limit;
        return $this;
    }

    /**
     * Sets separator between columns
     * @param string $character
     * @return $this
     */
    public function setDelimiter($character)
    {
        $this->delimiter = $character;
        return $this;
    }

    /**
     * Get first line of CSV file
     * @return array
     */
    public function getHeader()
    {
        $this->limit = 1;
        $header = $this->read();

        return empty($header) ? array() : reset($header);
    }

    /**
     * Sets header (first line)
     * @param array $header
     * @return $this
     */
    public function setHeader(array $header)
    {
        $this->header = $header;
        return $this;
    }

    /**
     * CSV reader
     * @return array
     */
    public function read()
    {
        $rows = array();

        $start = $this->offset ? $this->offset : $this->last;

        $this->key = 0;
        $this->last = 0;

        $parsed = 0;
        for ($this->rewind($start); $this->valid(); $this->next()) {

            $line = trim($this->current(), "\r\n");

            if (empty($line)) {
                continue;
            }

            if ($this->skip_header) {
                $this->skip_header = false;
                continue;
            }

            $quoted = false;
            $current_index = 0;
            $current_field = '';
            $fields = array();

            while ($current_index <= strlen($line)) {
                if ($quoted) {
                    $next_quote_index = strpos($line, '"', $current_index);

                    if ($next_quote_index === false) {
                        $current_field .= substr($line, $current_index);
                        $this->next();

                        if (!$this->valid()) {
                            $fields[] = $current_field;
                            break;
                        }

                        $current_field .= "\n";
                        $line = trim($this->current(), "\r\n");
                        $current_index = 0;
                        continue;
                    }

                    $current_field .= substr($line, $current_index, $next_quote_index - $current_index);

                    if (isset($line[$next_quote_index + 1]) && $line[$next_quote_index + 1] === '"') {
                        $current_field .= '"';
                        $current_index = $next_quote_index + 2;
                    } else {
                        $quoted = false;
                        $current_index = $next_quote_index + 1;
                    }
                } else {
                    $next_quote_index = strpos($line, '"', $current_index);
                    $next_delimiter_index = strpos($line, $this->delimiter, $current_index);

                    if ($next_quote_index === false) {
                        $next_index = $next_delimiter_index;
                    } elseif ($next_delimiter_index === false) {
                        $next_index = $next_quote_index;
                    } else {
                        $next_index = min($next_quote_index, $next_delimiter_index);
                    }

                    if ($next_index === false) {
                        $current_field .= substr($line, $current_index);
                        $fields[] = $current_field;
                        break;
                    } elseif ($line[$next_index] === $this->delimiter) {
                        $length = ($next_index + strlen($this->delimiter) - 1) - $current_index;
                        $current_field .= substr($line, $current_index, $length);
                        $fields[] = $current_field;
                        $current_field = '';
                        $current_index += $length + 1;
                    } else {
                        $quoted = true;
                        $current_field .= substr($line, $current_index, $next_index - $current_index);
                        $current_index = $next_index + 1;
                    }
                }
            }

            if (!empty($this->header)) {
                $row = array();
                foreach ($this->header as $key => $name) {
                    $field = array_shift($fields);
                    $row[$key] = isset($field) ? $field : '';
                }
            } else {
                $row = $fields;
            }

            $rows[$this->key] = $row;

            $parsed++;

            if (!empty($this->limit) && $parsed >= $this->limit) {
                $this->last = $this->getPosition();
                break;
            }

            $this->key++;
        }

        return $rows;
    }

    /**
     * Moves pointer to a certain position
     * @param integer $position
     */
    public function rewind($position = 0)
    {
        if (isset($this->handle)) {
            fseek($this->handle, $position);
            $this->next();
        }
    }

    /**
     * Sets current string and offset
     * @return null|integer
     */
    public function next()
    {
        if (isset($this->handle)) {
            $this->line = feof($this->handle) ? null : fgets($this->handle);
            $this->position = ftell($this->handle);
            return $this->line;
        }

        return null;
    }

    /**
     * Determines if CSV line is valid
     * @return boolean
     */
    public function valid()
    {
        return isset($this->line);
    }

    /**
     * Gets current CSV row
     * @return string
     */
    public function current()
    {
        return $this->line;
    }

    /**
     * Row key
     * @return int
     */
    public function key()
    {
        return $this->key;
    }

    /**
     * Gets current offset in bytes
     * @return integer
     */
    public function getPosition()
    {
        return $this->position;
    }

    /**
     * Get latest file pointer offset in bytes
     * @return integer
     */
    public function getOffset()
    {
        return $this->last;
    }

    /**
     * Sets initial file offset in bytes
     * @param integer $offset
     * @return $this
     */
    public function setOffset($offset)
    {
        $this->offset = $offset;
        return $this;
    }

    /**
     * Force to skip first row (header)
     * @return $this
     */
    public function skipHeader()
    {
        $this->skip_header = true;
        return $this;
    }

    /**
     * Parses CSV into multidimensional array
     * @return array
     */
    public function parse()
    {
        if (!empty($this->total)) {
            return $this->read();
        }

        return array();
    }

}


1			<?php
2
3			/**
4			* @package Import
5			* @author Iurii Makukh <[email protected]>
6			* @copyright Copyright (c) 2015, Iurii Makukh
7			* @license https://www.gnu.org/licenses/gpl.html GNU/GPLv3
8			*/
9
10			namespace gplcart\modules\import\helpers;
11
12			use Iterator;
13			use UnexpectedValueException;
14
15			/**
16			* Provides methods to read CSV data
17			*/
18			class Csv implements Iterator
19			{
20
21			/**
22			* File handler
23			* @var resource
24			*/
25			protected $handle;
26
27			/**
28			* Current CSV line
29			* @var string
30			*/
31			protected $line;
32
33			/**
34			* @var int
35			*/
36			protected $key;
37
38			/**
39			* Current offset in bytes
40			* @var integer
41			*/
42			protected $position;
43
44			/**
45			* Total CSV file size in bytes
46			* @var integer
47			*/
48			protected $total;
49
50			/**
51			* Path to CSV file
52			* @var string
53			*/
54			protected $file;
55
56			/**
57			* Max number of rows to parse
58			* @var integer
59			*/
60			protected $limit;
61
62			/**
63			* Final offset in bytes
64			* @var integer
65			*/
66			protected $last = 0;
67
68			/**
69			* Starting offset in bytes
70			* @var integer
71			*/
72			protected $offset = 0;
73
74			/**
75			* Array of header names
76			* @var array
77			*/
78			protected $header = array();
79
80			/**
81			* Skip or not first line
82			* @var boolean
83			*/
84			protected $skip_header = false;
85
86			/**
87			* CSV delimiter
88			* @var string
89			*/
90			protected $delimiter = ",";
91
92			/**
93			* Constructor
94			*/
95			public function __construct()
96			{
97			ini_set('auto_detect_line_endings', true);
98			}
99
100			/**
101			* Closes file handler
102			*/
103			public function __destruct()
104			{
105			if (is_resource($this->handle)) {
106			fclose($this->handle);
107			}
108			}
109
110			/**
111			* Sets file to parse
112			* @param string $file
113			* @param integer $filesize
114			* @return $this
115			*/
116			public function open($file, $filesize = null)
117			{
118			$this->handle = fopen($file, 'r');
119
120			if (!is_resource($this->handle)) {
121			throw new UnexpectedValueException('Failed to open CSV file');
122			}
123
124			$this->file = $file;
125			$this->total = isset($filesize) ? (int) $filesize : filesize($file);
126			return $this;
127			}
128
129			/**
130			* Sets max lines to parse
131			* @param integer $limit
132			* @return $this
133			*/
134			public function setLimit($limit)
135			{
136			$this->limit = (int) $limit;
137			return $this;
138			}
139
140			/**
141			* Sets separator between columns
142			* @param string $character
143			* @return $this
144			*/
145			public function setDelimiter($character)
146			{
147			$this->delimiter = $character;
148			return $this;
149			}
150
151			/**
152			* Get first line of CSV file
153			* @return array
154			*/
155			public function getHeader()
156			{
157			$this->limit = 1;
158			$header = $this->read();
159
160			return empty($header) ? array() : reset($header);
161			}
162
163			/**
164			* Sets header (first line)
165			* @param array $header
166			* @return $this
167			*/
168			public function setHeader(array $header)
169			{
170			$this->header = $header;
171			return $this;
172			}
173
174			/**
175			* CSV reader
176			* @return array
177			*/
178			public function read()
179			{
180			$rows = array();
181
182			$start = $this->offset ? $this->offset : $this->last;
183
184			$this->key = 0;
185			$this->last = 0;
186
187			$parsed = 0;
188			for ($this->rewind($start); $this->valid(); $this->next()) {
189
190			$line = trim($this->current(), "\r\n");
191
192			if (empty($line)) {
193			continue;
194			}
195
196			if ($this->skip_header) {
197			$this->skip_header = false;
198			continue;
199			}
200
201			$quoted = false;
202			$current_index = 0;
203			$current_field = '';
204			$fields = array();
205
206			while ($current_index <= strlen($line)) {
207			if ($quoted) {
208			$next_quote_index = strpos($line, '"', $current_index);
209
210			if ($next_quote_index === false) {
211			$current_field .= substr($line, $current_index);
212			$this->next();
213
214			if (!$this->valid()) {
215			$fields[] = $current_field;
216			break;
217			}
218
219			$current_field .= "\n";
220			$line = trim($this->current(), "\r\n");
221			$current_index = 0;
222			continue;
223			}
224
225			$current_field .= substr($line, $current_index, $next_quote_index - $current_index);
226
227			if (isset($line[$next_quote_index + 1]) && $line[$next_quote_index + 1] === '"') {
228			$current_field .= '"';
229			$current_index = $next_quote_index + 2;
230			} else {
231			$quoted = false;
232			$current_index = $next_quote_index + 1;
233			}
234			} else {
235			$next_quote_index = strpos($line, '"', $current_index);
236			$next_delimiter_index = strpos($line, $this->delimiter, $current_index);
237
238			if ($next_quote_index === false) {
239			$next_index = $next_delimiter_index;
240			} elseif ($next_delimiter_index === false) {
241			$next_index = $next_quote_index;
242			} else {
243			$next_index = min($next_quote_index, $next_delimiter_index);
244			}
245
246			if ($next_index === false) {
247			$current_field .= substr($line, $current_index);
248			$fields[] = $current_field;
249			break;
250			} elseif ($line[$next_index] === $this->delimiter) {
251			$length = ($next_index + strlen($this->delimiter) - 1) - $current_index;
252			$current_field .= substr($line, $current_index, $length);
253			$fields[] = $current_field;
254			$current_field = '';
255			$current_index += $length + 1;
256			} else {
257			$quoted = true;
258			$current_field .= substr($line, $current_index, $next_index - $current_index);
259			$current_index = $next_index + 1;
260			}
261			}
262			}
263
264			if (!empty($this->header)) {
265			$row = array();
266			foreach ($this->header as $key => $name) {
267			$field = array_shift($fields);
268			$row[$key] = isset($field) ? $field : '';
269			}
270			} else {
271			$row = $fields;
272			}
273
274			$rows[$this->key] = $row;
275
276			$parsed++;
277
278			if (!empty($this->limit) && $parsed >= $this->limit) {
279			$this->last = $this->getPosition();
280			break;
281			}
282
283			$this->key++;
284			}
285
286			return $rows;
287			}
288
289			/**
290			* Moves pointer to a certain position
291			* @param integer $position
292			*/
293			public function rewind($position = 0)
294			{
295			if (isset($this->handle)) {
296			fseek($this->handle, $position);
297			$this->next();
298			}
299			}
300
301			/**
302			* Sets current string and offset
303			* @return null\|integer
304			*/
305			public function next()
306			{
307			if (isset($this->handle)) {
308			$this->line = feof($this->handle) ? null : fgets($this->handle);
309			$this->position = ftell($this->handle);
310			return $this->line;
311			}
312
313			return null;
314			}
315
316			/**
317			* Determines if CSV line is valid
318			* @return boolean
319			*/
320			public function valid()
321			{
322			return isset($this->line);
323			}
324
325			/**
326			* Gets current CSV row
327			* @return string
328			*/
329			public function current()
330			{
331			return $this->line;
332			}
333
334			/**
335			* Row key
336			* @return int
337			*/
338			public function key()
339			{
340			return $this->key;
341			}
342
343			/**
344			* Gets current offset in bytes
345			* @return integer
346			*/
347			public function getPosition()
348			{
349			return $this->position;
350			}
351
352			/**
353			* Get latest file pointer offset in bytes
354			* @return integer
355			*/
356			public function getOffset()
357			{
358			return $this->last;
359			}
360
361			/**
362			* Sets initial file offset in bytes
363			* @param integer $offset
364			* @return $this
365			*/
366			public function setOffset($offset)
367			{
368			$this->offset = $offset;
369			return $this;
370			}
371
372			/**
373			* Force to skip first row (header)
374			* @return $this
375			*/
376			public function skipHeader()
377			{
378			$this->skip_header = true;
379			return $this;
380			}
381
382			/**
383			* Parses CSV into multidimensional array
384			* @return array
385			*/
386			public function parse()
387			{
388			if (!empty($this->total)) {
389			return $this->read();
390			}
391
392			return array();
393			}
394
395			}
396

gplcart / import

Push — master ( 77ec27...fb3ff4 )

Csv::read() D

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

Long Method

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