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

Completed

Push — master ( f5f3dd...77ec27 )

by Iurii

created 2018-02-21 13:26 UTC

Csv::read() D

↳ Parent: Csv

Complexity

Conditions	20
Paths	46

Size

Total Lines	106
Code Lines	72

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
c	0
b	0
f	0
dl	0
loc	106
rs	4.7294
cc	20
eloc	72
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 UnexpectedValueException;

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

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

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

    /**
     * Current offset in bytes
     * @var integer
     */
    protected $current_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_position = 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()
    {
        $this->close();
    }

    /**
     * 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;
    }

    /**
     * Close file handle
     */
    public function close()
    {
        if (is_resource($this->handle)) {
            fclose($this->handle);
        }
    }

    /**
     * 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_position;
        $this->last_position = 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[] = $row;

            $parsed++;

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

        return $rows;
    }

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

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

        return null;
    }

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

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

    /**
     * Gets current offset in bytes
     * @return integer
     */
    protected function currentPosition()
    {
        return $this->current_position;
    }

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

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

gplcart / import

Push — master ( f5f3dd...77ec27 )

Csv::read() D

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

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