Reader::readLine() - Code Metrics - Inspection of "Updated roadmap and changelog" - nozavroni/csvelte - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 0a5b37...5c1aea )

by Luke

created 2016-09-17 08:50 UTC

Reader::readLine() B

↳ Parent: Reader

Complexity

Conditions	6
Paths	18

Size

Total Lines	18
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	11
CRAP Score	6

Importance

Changes

Metric	Value
c	0
b	0
f	0
dl	0
loc	18
ccs	11
cts	11
cp	1
rs	8.8571
cc	6
eloc	13
nc	18
nop	0
crap	6

<?php
/**
 * CSVelte: Slender, elegant CSV for PHP
 *
 * Inspired by Python's CSV module and Frictionless Data and the W3C's CSV
 * standardization efforts, CSVelte was written in an effort to take all the
 * suck out of working with CSV.
 *
 * @version   v0.2
 * @copyright Copyright (c) 2016 Luke Visinoni <[email protected]>
 * @author    Luke Visinoni <[email protected]>
 * @license   https://github.com/deni-zen/csvelte/blob/master/LICENSE The MIT License (MIT)
 */
namespace CSVelte;

use \InvalidArgumentException;
use \FilterIterator;
use CSVelte\IO\Stream;
use CSVelte\Contract\Readable;
use CSVelte\Table\Row;
use CSVelte\Table\HeaderRow;
use CSVelte\Exception\EndOfFileException;
use CSVelte\Reader\FilteredIterator as FilteredReader;

/**
 * CSV Reader
 *
 * Reads CSV data from any object that implements CSVelte\Contract\Readable.
 *
 * @package CSVelte
 * @subpackage Reader
 * @since v0.1
 * @todo Also, is there any way to do some kind of caching or something? Probably
 *     not but if you could that would be a cool feature...
 */
class Reader implements \Iterator
{
    const PLACEHOLDER_DELIM   = '[=[__DLIM__]=]';
    const PLACEHOLDER_NEWLINE = '[=[__NWLN__]=]';

    /**
     * This class supports any sources of input that implements this interface.
     * This way I can read from local files, streams, FTP, any class that implements
     * the "Readable" interface
     * @var \CSVelte\Contract\Readable
     */
    protected $source;

    /**
     * @var \CSVelte\Flavor The "flavor" or format of the CSV being read
     */
    protected $flavor;

    /**
     * @var \CSVelte\Table\Row|boolean Row currently loaded into memory
     */
    protected $current;

    /**
     * @var integer The current line being read (from input source)
     */
    protected $line = 0;

    /**
     * @var \CSVelte\Table\HeaderRow The header row (if any)
     */
    protected $header;

    /**
     * @var array An array of callback functions
     */
    protected $filters = array();

    /**
     * @var bool True if current line ended while inside a quoted string
     */
    protected $open = false;

    /**
     * @var bool True if last character read was the escape character
     */
    protected $escape = false;

    /**
     * Reader Constructor.
     * Initializes a reader object using an input source and optionally a flavor
     *
     * @param \CSVelte\Contract\Readable $input The source of our CSV data
     * @param \CSVelte\Flavor|array|null $flavor The "flavor" or format specification object
     */
    public function __construct($input, $flavor = null)
    {
        $this->setSource($input)
             ->setFlavor($flavor)
             ->rewind();
    }

    /**
     * Set the flavor.
     *
     * Set the ``CSVelte\Flavor`` object, used to determine CSV format.
     *
     * @param \CSVelte\Flavor|array|null $flavor Either an array or a flavor object
     */
    protected function setFlavor($flavor = null)
    {
        if (is_array($flavor)) $flavor = new Flavor($flavor);
        $taster = new Taster($this->source);
        // @todo put this inside a try/catch
        if (is_null($flavor)) {
            $flavor = $taster->lick();
        }
        if (is_null($flavor->header)) {
            // Flavor is immutable, give me a new one with header set to lickHeader return val
            $flavor = $flavor->copy(['header' => $taster->lickHeader($flavor->delimiter, $flavor->lineTerminator)]);
        }
        $this->flavor = $flavor;
        return $this;
    }

    /**
     * Set the reader source.
     *
     * The reader can accept anything that implements Readable and is actually
     * readable (can be read). This will make sure that whatever is passed to
     * the reader meets these expectations and set $this->source. It can also
     * accept any string (or any object with a __toString() method), or an
     * SplFileObject, so long as it represents a file rather than a directory. 
     *
     * @param \CSVelte\Contract\Readable|object|string|SplFileObject $input See description
     * @return $this
     */
    protected function setSource($input)
    {
        if ($input instanceof Readable && $input->isReadable()) {
            $this->source = $input;
        } elseif (file_exists((string) $input)) {
            $this->source = new IO\Stream($input);
        } else {
            $this->source = Stream::streamize($input);
        }
        return $this;
    }

    /**
     * Load a line into memory
     *
     * @return void ($this?)
     * @access protected
     */
    protected function load()
    {
        if (is_null($this->current)) {
            try {
                $line = $this->readLine();
                $this->line++;
                $parsed = $this->parse($line);
                if ($this->hasHeader() && $this->line === 1) {
                    $this->header = new HeaderRow($parsed);
                } else {
                    $this->current = new Row($parsed);
                    if ($this->header) $this->current->setHeaderRow($this->header);
                }
            } catch (EndOfFileException $e) {
                $this->current = false;
            }
        }
    }

    /**
     * Read single line from CSV data source (stream, file, etc.), taking into
     * account CSV's de-facto quoting rules with respect to designated line
     * terminator character when they fall within quoted strings.
     *
     * @return string A CSV row (could possibly span multiple lines depending on
     *     quoting and escaping)
     * @throws \CSVelte\Exception\EndOfFileException when eof has been reached
     *     and the read buffer has all been returned
     */
    protected function readLine()
    {
        $f = $this->getFlavor();
        $eol = $f->lineTerminator;
        try {
            do {
                if (!isset($lines)) $lines = array();
                if (false === ($line = $this->source->readLine($eol))) {
                    throw new EndOfFileException("End of file reached: " . $this->source->getName());
                }
                array_push($lines, rtrim($line, $eol));
            } while ($this->inQuotedString(end($lines), $f->quoteChar, $f->escapeChar));
        } catch (EndOfFileException $e) {
            // only throw the exception if we don't already have lines in the buffer
            if (!count($lines)) throw $e;
        }
        return rtrim(implode($eol, $lines), $eol);
    }

    /**
     * Determine whether last line ended while a quoted string was still "open"
     *
     * This method is used in a loop to determine if each line being read ends
     * while a quoted string is still "open".
     *
     * @param string $line Line of csv to analyze
     * @param string $quoteChar The quote/enclosure character to use
     * @param string $escapeChar The escape char/sequence to use
     * @return bool True if currently within a quoted string
     */
    protected function inQuotedString($line, $quoteChar, $escapeChar)
    {
        if (!empty($line)) {
            do {
                if (!isset($i)) $i = 0;
                $c = $line[$i++];
                if ($this->escape) {
                    $this->escape = false;
                    continue;
                }
                $this->escape = ($c == $escapeChar);
                if ($c == $quoteChar) $this->open = !$this->open;
            } while ($i < strlen($line));
        }
        return $this->open;
    }

    /**
     * Flavor Getter.
     *
     * Retreive the "flavor" object being used by the reader
     *
     * @return \CSVelte\Flavor
     * @access public
     */
    public function getFlavor()
    {
        return $this->flavor;
    }

    /**
     * Check if flavor object defines header.
     *
     * Determine whether or not the input source's CSV data contains a header
     * row or not. Unless you explicitly specify so within your Flavor object,
     * this method is a logical best guess. The CSV format does not
     * provide metadata of any kind and therefor does not provide this info.
     *
     * @return boolean True if the input source has a header row (or, to be more )
     *     accurate, if the flavor SAYS it has a header row)
     * @todo Rather than always reading in Taster::SAMPLE_SIZE, read in ten lines at a time until
     *     whatever method it is has enough data to make a reliable decision/guess
     */
    public function hasHeader()
    {
        return $this->getFlavor()->header;
    }

    /**
     * Temporarily replace special characters within a quoted string
     *
     * Replace all instances of newlines and whatever character you specify (as
     * the delimiter) that are contained within quoted text. The replacements are
     * simply a special placeholder string. This is done so that I can use the
     * very unsmart "explode" function and not have to worry about it exploding
     * on delimiters or newlines within quotes. Once I have exploded, I typically
     * sub back in the real characters before doing anything else.
     *
     * @param string $data The string to do the replacements on
     * @param string $delim The delimiter character to replace
     * @param string $quo The quote character
     * @param string $eol Line terminator character/sequence
     * @return string The data with replacements performed
     * @access protected
     * @internal
     * @todo I could probably pass in (maybe optionally) the newline character I
     *     want to replace as well. I'll do that if I need to.
     * @todo Create a regex class so you can do $regex->escape() rather than
     *     preg_quote
     */
    protected function replaceQuotedSpecialChars($data, $delim, $quo, $eol)
    {
        return preg_replace_callback('/(['. preg_quote($quo, '/') . '])(.*)\1/imsU', function($matches) use ($delim, $eol) {
            $ret = str_replace($eol, self::PLACEHOLDER_NEWLINE, $matches[0]);
            $ret = str_replace($delim, self::PLACEHOLDER_DELIM, $ret);
            return $ret;
        }, $data);
    }

    /**
     * Undo temporary special char replacements
     *
     * Replace the special character placeholders with the characters they
     * originally substituted.
     *
     * @param string $data The data to undo replacements in
     * @param string $delim The delimiter character
     * @param string $eol The character or string of characters used to terminate lines
     * @return string The data with placeholders replaced with original characters
     * @internal
     */
    protected function undoReplaceQuotedSpecialChars($data, $delim, $eol)
    {
        $replacements = array(self::PLACEHOLDER_DELIM => $delim, self::PLACEHOLDER_NEWLINE => $eol);
        if (array_walk($replacements, function($replacement, $placeholder) use (&$data) {
            $data = str_replace($placeholder, $replacement, $data);
        })) {
            return $data;
        }
    }

    /**
     * Remove quotes wrapping text.
     *
     * @param string $data The data to unquote
     * @return string The data with quotes stripped from the outside of it
     * @internal
     */
    protected function unQuote($data)
    {
        $escapeChar = $this->getFlavor()->doubleQuote ? $this->getFlavor()->quoteChar : $this->getFlavor()->escapeChar;
        $quoteChar = $this->getFlavor()->quoteChar;
        $data = $this->unEscape($data, $escapeChar, $quoteChar);
        return preg_replace('/^(["\'])(.*)\1$/ms', '\2', $data);
    }

    /**
     * @internal
     * @todo This actually shouldn't even be necessary. Characters should be read
     *     in one at a time and a quote that follows another should just be ignored
     *     deeming this unnecessary.
     */
    protected function unEscape($str, $esc, $quo)
    {
        return str_replace($esc . $quo, $quo, $str);
    }

    /**
     * Parse a line of CSV data into an array of columns
     *
     * @param string A line of CSV data to parse
     * @return array An array of columns
     * @access protected
     * @internal
     */
    protected function parse($line)
    {
        $f = $this->getFlavor();
        $replaced = $this->replaceQuotedSpecialChars($line, $f->delimiter, $f->quoteChar, $f->lineTerminator);
        $columns = explode($f->delimiter, $replaced);
        $that = $this;
        return array_map(function($val) use ($that, $f) {
            $undone = $that->undoReplaceQuotedSpecialChars($val, $f->delimiter, $f->lineTerminator);
            return $this->unQuote($undone);
        }, $columns);
    }

    /**
     * Retrieve current row.
     *
     * @return CSVelte\Table\Row The current row
     */
    public function current()
    {
        return $this->current;
    }

    /**
     * Advance to the next row
     *
     * @return CSVelte\Table\Row|null The current row (if there is one)
     */
    public function next()
    {

        $this->current = null;
        $this->load();
        return $this->current;
    }

    /**
     * Determine if current position has valid row.
     *
     * @return boolean True if current row is valid
     */
    public function valid()
    {
        return (bool) $this->current;
    }

    /**
     * Retrieve current row key (line number).
     *
     * @return int The current line number
     */
    public function key()
    {
        return $this->line;
    }

    /**
     * Rewind to the beginning of the dataset.
     *
     * @return CSVelte\Table\Row|null The current row
     */
    public function rewind()
    {
        $this->line = 0;
        $this->source->rewind();
        $this->current = null;
        $this->load();
        if ($this->hasHeader()) {
            $this->next();
        }
        return $this->current();
    }

    /**
     * Retrieve header row.
     *
     * @return CSVelte\Table\HeaderRow|null The header row if there is one
     */
    public function header()
    {
        return $this->header;
    }

    /**
     * Add anonumous function as filter.
     *
     * Add an anonymous function that accepts the current row as its only argument.
     * Return true from the function to keep that row, false otherwise.
     *
     * @param Callable $filter An anonymous function to filter out row by certain criteria
     * @return $this
     */
    public function addFilter(Callable $filter)
    {
        array_push($this->filters, $filter);
        return $this;
    }

    /**
     * Add multiple filters at once.
     *
     * Add an array of anonymous functions to filter out certain rows.
     *
     * @param array $filters An array of anonymous functions
     * @return $this
     */
    public function addFilters(array $filters)
    {
        foreach ($filters as $filter) {
            $this->addFilter($filter);
        }
        return $this;
    }

    /**
     * Returns an iterator with rows from user-supplied filter functions removed
     *
     * @return CSVelte\Reader\FilteredReader An iterator with filtered rows
     */
    public function filter()
    {
        return new FilteredReader($this, $this->filters);
    }

    /**
     * Retrieve the contents of the dataset as an array of arrays.
     *
     * @return array An array of arrays of CSV content
     */
    public function toArray()
    {
        return array_map(function($row){
            return $row->toArray();
        }, iterator_to_array($this));
    }

}


1		<?php
2		/**
3		* CSVelte: Slender, elegant CSV for PHP
4		*
5		* Inspired by Python's CSV module and Frictionless Data and the W3C's CSV
6		* standardization efforts, CSVelte was written in an effort to take all the
7		* suck out of working with CSV.
8		*
9		* @version v0.2
10		* @copyright Copyright (c) 2016 Luke Visinoni <[email protected]>
11		* @author Luke Visinoni <[email protected]>
12		* @license https://github.com/deni-zen/csvelte/blob/master/LICENSE The MIT License (MIT)
13		*/
14		namespace CSVelte;
15
16		use \InvalidArgumentException;
17		use \FilterIterator;
18		use CSVelte\IO\Stream;
19		use CSVelte\Contract\Readable;
20		use CSVelte\Table\Row;
21		use CSVelte\Table\HeaderRow;
22		use CSVelte\Exception\EndOfFileException;
23		use CSVelte\Reader\FilteredIterator as FilteredReader;
24
25		/**
26		* CSV Reader
27		*
28		* Reads CSV data from any object that implements CSVelte\Contract\Readable.
29		*
30		* @package CSVelte
31		* @subpackage Reader
32		* @since v0.1
33		* @todo Also, is there any way to do some kind of caching or something? Probably
34		* not but if you could that would be a cool feature...
35		*/
36		class Reader implements \Iterator
37		{
38		const PLACEHOLDER_DELIM = '[=[__DLIM__]=]';
39		const PLACEHOLDER_NEWLINE = '[=[__NWLN__]=]';
40
41		/**
42		* This class supports any sources of input that implements this interface.
43		* This way I can read from local files, streams, FTP, any class that implements
44		* the "Readable" interface
45		* @var \CSVelte\Contract\Readable
46		*/
47		protected $source;
48
49		/**
50		* @var \CSVelte\Flavor The "flavor" or format of the CSV being read
51		*/
52		protected $flavor;
53
54		/**
55		* @var \CSVelte\Table\Row\|boolean Row currently loaded into memory
56		*/
57		protected $current;
58
59		/**
60		* @var integer The current line being read (from input source)
61		*/
62		protected $line = 0;
63
64		/**
65		* @var \CSVelte\Table\HeaderRow The header row (if any)
66		*/
67		protected $header;
68
69		/**
70		* @var array An array of callback functions
71		*/
72		protected $filters = array();
73
74		/**
75		* @var bool True if current line ended while inside a quoted string
76		*/
77		protected $open = false;
78
79		/**
80		* @var bool True if last character read was the escape character
81		*/
82		protected $escape = false;
83
84		/**
85		* Reader Constructor.
86		* Initializes a reader object using an input source and optionally a flavor
87		*
88		* @param \CSVelte\Contract\Readable $input The source of our CSV data
89		* @param \CSVelte\Flavor\|array\|null $flavor The "flavor" or format specification object
90		*/
91	22	public function __construct($input, $flavor = null)
92		{
93	22	$this->setSource($input)
94	22	->setFlavor($flavor)
95	22	->rewind();
96	22	}
97
98		/**
99		* Set the flavor.
100		*
101		* Set the ``CSVelte\Flavor`` object, used to determine CSV format.
102		*
103		* @param \CSVelte\Flavor\|array\|null $flavor Either an array or a flavor object
104		*/
105	20	protected function setFlavor($flavor = null)
106		{
107	20	if (is_array($flavor)) $flavor = new Flavor($flavor);
108	20	$taster = new Taster($this->source);
109		// @todo put this inside a try/catch
110	20	if (is_null($flavor)) {
111	12	$flavor = $taster->lick();
112	12	}
113	20	if (is_null($flavor->header)) {
114		// Flavor is immutable, give me a new one with header set to lickHeader return val
115	4	$flavor = $flavor->copy(['header' => $taster->lickHeader($flavor->delimiter, $flavor->lineTerminator)]);
116	4	}
117	20	$this->flavor = $flavor;
118	20	return $this;
119		}
120
121		/**
122		* Set the reader source.
123		*
124		* The reader can accept anything that implements Readable and is actually
125		* readable (can be read). This will make sure that whatever is passed to
126		* the reader meets these expectations and set $this->source. It can also
127		* accept any string (or any object with a __toString() method), or an
128		* SplFileObject, so long as it represents a file rather than a directory.
129		*
130		* @param \CSVelte\Contract\Readable\|object\|string\|SplFileObject $input See description
131		* @return $this
132		*/
133	20	protected function setSource($input)
134		{
135	20	if ($input instanceof Readable && $input->isReadable()) {
136	9	$this->source = $input;
137	20	} elseif (file_exists((string) $input)) {
138	2	$this->source = new IO\Stream($input);
139	2	} else {
140	10	$this->source = Stream::streamize($input);
141		}
142	20	return $this;
143		}
144
145		/**
146		* Load a line into memory
147		*
148		* @return void ($this?)
149		* @access protected
150		*/
151	20	protected function load()
152		{
153	20	if (is_null($this->current)) {
154		try {
155	20	$line = $this->readLine();
156	20	$this->line++;
157	20	$parsed = $this->parse($line);
158	20	if ($this->hasHeader() && $this->line === 1) {
159	14	$this->header = new HeaderRow($parsed);
160	14	} else {
161	20	$this->current = new Row($parsed);
162	20	if ($this->header) $this->current->setHeaderRow($this->header);
163		}
164	20	} catch (EndOfFileException $e) {
165	7	$this->current = false;
166		}
167	20	}
168	20	}
169
170		/**
171		* Read single line from CSV data source (stream, file, etc.), taking into
172		* account CSV's de-facto quoting rules with respect to designated line
173		* terminator character when they fall within quoted strings.
174		*
175		* @return string A CSV row (could possibly span multiple lines depending on
176		* quoting and escaping)
177		* @throws \CSVelte\Exception\EndOfFileException when eof has been reached
178		* and the read buffer has all been returned
179		*/
180	20	protected function readLine()
181		{
182	20	$f = $this->getFlavor();
183	20	$eol = $f->lineTerminator;
184		try {
185		do {
186	20	if (!isset($lines)) $lines = array();
187	20	if (false === ($line = $this->source->readLine($eol))) {
188	7	throw new EndOfFileException("End of file reached: " . $this->source->getName());
189		}
190	20	array_push($lines, rtrim($line, $eol));
191	20	} while ($this->inQuotedString(end($lines), $f->quoteChar, $f->escapeChar));
192	20	} catch (EndOfFileException $e) {
193		// only throw the exception if we don't already have lines in the buffer
194	7	if (!count($lines)) throw $e;
195		}
196	20	return rtrim(implode($eol, $lines), $eol);
197		}
198
199		/**
200		* Determine whether last line ended while a quoted string was still "open"
201		*
202		* This method is used in a loop to determine if each line being read ends
203		* while a quoted string is still "open".
204		*
205		* @param string $line Line of csv to analyze
206		* @param string $quoteChar The quote/enclosure character to use
207		* @param string $escapeChar The escape char/sequence to use
208		* @return bool True if currently within a quoted string
209		*/
210	20	protected function inQuotedString($line, $quoteChar, $escapeChar)
211		{
212	20	if (!empty($line)) {
213		do {
214	20	if (!isset($i)) $i = 0;
215	20	$c = $line[$i++];
216	20	if ($this->escape) {
217		$this->escape = false;
218		continue;
219		}
220	20	$this->escape = ($c == $escapeChar);
221	20	if ($c == $quoteChar) $this->open = !$this->open;
222	20	} while ($i < strlen($line));
223	20	}
224	20	return $this->open;
225		}
226
227		/**
228		* Flavor Getter.
229		*
230		* Retreive the "flavor" object being used by the reader
231		*
232		* @return \CSVelte\Flavor
233		* @access public
234		*/
235	20	public function getFlavor()
236		{
237	20	return $this->flavor;
238		}
239
240		/**
241		* Check if flavor object defines header.
242		*
243		* Determine whether or not the input source's CSV data contains a header
244		* row or not. Unless you explicitly specify so within your Flavor object,
245		* this method is a logical best guess. The CSV format does not
246		* provide metadata of any kind and therefor does not provide this info.
247		*
248		* @return boolean True if the input source has a header row (or, to be more )
249		* accurate, if the flavor SAYS it has a header row)
250		* @todo Rather than always reading in Taster::SAMPLE_SIZE, read in ten lines at a time until
251		* whatever method it is has enough data to make a reliable decision/guess
252		*/
253	20	public function hasHeader()
254		{
255	20	return $this->getFlavor()->header;
256		}
257
258		/**
259		* Temporarily replace special characters within a quoted string
260		*
261		* Replace all instances of newlines and whatever character you specify (as
262		* the delimiter) that are contained within quoted text. The replacements are
263		* simply a special placeholder string. This is done so that I can use the
264		* very unsmart "explode" function and not have to worry about it exploding
265		* on delimiters or newlines within quotes. Once I have exploded, I typically
266		* sub back in the real characters before doing anything else.
267		*
268		* @param string $data The string to do the replacements on
269		* @param string $delim The delimiter character to replace
270		* @param string $quo The quote character
271		* @param string $eol Line terminator character/sequence
272		* @return string The data with replacements performed
273		* @access protected
274		* @internal
275		* @todo I could probably pass in (maybe optionally) the newline character I
276		* want to replace as well. I'll do that if I need to.
277		* @todo Create a regex class so you can do $regex->escape() rather than
278		* preg_quote
279		*/
280	20	protected function replaceQuotedSpecialChars($data, $delim, $quo, $eol)
281		{
282		return preg_replace_callback('/(['. preg_quote($quo, '/') . '])(.*)\1/imsU', function($matches) use ($delim, $eol) {
283	11	$ret = str_replace($eol, self::PLACEHOLDER_NEWLINE, $matches[0]);
284	11	$ret = str_replace($delim, self::PLACEHOLDER_DELIM, $ret);
285	11	return $ret;
286	20	}, $data);
287		}
288
289		/**
290		* Undo temporary special char replacements
291		*
292		* Replace the special character placeholders with the characters they
293		* originally substituted.
294		*
295		* @param string $data The data to undo replacements in
296		* @param string $delim The delimiter character
297		* @param string $eol The character or string of characters used to terminate lines
298		* @return string The data with placeholders replaced with original characters
299		* @internal
300		*/
301	20	protected function undoReplaceQuotedSpecialChars($data, $delim, $eol)
302		{
303	20	$replacements = array(self::PLACEHOLDER_DELIM => $delim, self::PLACEHOLDER_NEWLINE => $eol);
304		if (array_walk($replacements, function($replacement, $placeholder) use (&$data) {
305	20	$data = str_replace($placeholder, $replacement, $data);
306	20	})) {
307	20	return $data;
308		}
309		}
310
311		/**
312		* Remove quotes wrapping text.
313		*
314		* @param string $data The data to unquote
315		* @return string The data with quotes stripped from the outside of it
316		* @internal
317		*/
318	20	protected function unQuote($data)
319		{
320	20	$escapeChar = $this->getFlavor()->doubleQuote ? $this->getFlavor()->quoteChar : $this->getFlavor()->escapeChar;
321	20	$quoteChar = $this->getFlavor()->quoteChar;
322	20	$data = $this->unEscape($data, $escapeChar, $quoteChar);
323	20	return preg_replace('/^(["\'])(.*)\1$/ms', '\2', $data);
324		}
325
326		/**
327		* @internal
328		* @todo This actually shouldn't even be necessary. Characters should be read
329		* in one at a time and a quote that follows another should just be ignored
330		* deeming this unnecessary.
331		*/
332	20	protected function unEscape($str, $esc, $quo)
333		{
334	20	return str_replace($esc . $quo, $quo, $str);
335		}
336
337		/**
338		* Parse a line of CSV data into an array of columns
339		*
340		* @param string A line of CSV data to parse
341		* @return array An array of columns
342		* @access protected
343		* @internal
344		*/
345	20	protected function parse($line)
346		{
347	20	$f = $this->getFlavor();
348	20	$replaced = $this->replaceQuotedSpecialChars($line, $f->delimiter, $f->quoteChar, $f->lineTerminator);
349	20	$columns = explode($f->delimiter, $replaced);
350	20	$that = $this;
351		return array_map(function($val) use ($that, $f) {
352	20	$undone = $that->undoReplaceQuotedSpecialChars($val, $f->delimiter, $f->lineTerminator);
353	20	return $this->unQuote($undone);
354	20	}, $columns);
355		}
356
357		/**
358		* Retrieve current row.
359		*
360		* @return CSVelte\Table\Row The current row
361		*/
362	20	public function current()
363		{
364	20	return $this->current;
365		}
366
367		/**
368		* Advance to the next row
369		*
370		* @return CSVelte\Table\Row\|null The current row (if there is one)
371		*/
372	15	public function next()
373		{
374
375	15	$this->current = null;
376	15	$this->load();
377	15	return $this->current;
378		}
379
380		/**
381		* Determine if current position has valid row.
382		*
383		* @return boolean True if current row is valid
384		*/
385	8	public function valid()
386		{
387	8	return (bool) $this->current;
388		}
389
390		/**
391		* Retrieve current row key (line number).
392		*
393		* @return int The current line number
394		*/
395	5	public function key()
396		{
397	5	return $this->line;
398		}
399
400		/**
401		* Rewind to the beginning of the dataset.
402		*
403		* @return CSVelte\Table\Row\|null The current row
404		*/
405	20	public function rewind()
406		{
407	20	$this->line = 0;
408	20	$this->source->rewind();
409	20	$this->current = null;
410	20	$this->load();
411	20	if ($this->hasHeader()) {
412	14	$this->next();
413	14	}
414	20	return $this->current();
415		}
416
417		/**
418		* Retrieve header row.
419		*
420		* @return CSVelte\Table\HeaderRow\|null The header row if there is one
421		*/
422	2	public function header()
423		{
424	2	return $this->header;
425		}
426
427		/**
428		* Add anonumous function as filter.
429		*
430		* Add an anonymous function that accepts the current row as its only argument.
431		* Return true from the function to keep that row, false otherwise.
432		*
433		* @param Callable $filter An anonymous function to filter out row by certain criteria
434		* @return $this
435		*/
436	3	public function addFilter(Callable $filter)
437		{
438	3	array_push($this->filters, $filter);
439	3	return $this;
440		}
441
442		/**
443		* Add multiple filters at once.
444		*
445		* Add an array of anonymous functions to filter out certain rows.
446		*
447		* @param array $filters An array of anonymous functions
448		* @return $this
449		*/
450	1	public function addFilters(array $filters)
451		{
452	1	foreach ($filters as $filter) {
453	1	$this->addFilter($filter);
454	1	}
455	1	return $this;
456		}
457
458		/**
459		* Returns an iterator with rows from user-supplied filter functions removed
460		*
461		* @return CSVelte\Reader\FilteredReader An iterator with filtered rows
462		*/
463	3	public function filter()
464		{
465	3	return new FilteredReader($this, $this->filters);
466		}
467
468		/**
469		* Retrieve the contents of the dataset as an array of arrays.
470		*
471		* @return array An array of arrays of CSV content
472		*/
473		public function toArray()
474		{
475	1	return array_map(function($row){
476	1	return $row->toArray();
477	1	}, iterator_to_array($this));
478		}
479
480		}
481

nozavroni / csvelte

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