Statement::process() - Code Metrics - Inspection of "Decoupling Query from Reader" - thephpleague/csv - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#178)

by ignace nyamagana

created 2016-09-09 08:53 UTC

Statement::process() A

↳ Parent: Statement

Complexity

Conditions	3
Paths	4

Size

Total Lines	23
Code Lines	16

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	23
rs	9.0856
cc	3
eloc	16
nc	4
nop	1

<?php
/**
* This file is part of the League.csv library
*
* @license http://opensource.org/licenses/MIT
* @link https://github.com/thephpleague/csv/
* @version 8.1.1
* @package League.csv
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\Csv;

use ArrayIterator;
use CallbackFilterIterator;
use InvalidArgumentException;
use Iterator;
use League\Csv\Config\Validator;
use LimitIterator;

/**
 * A simple Statement class to fetch rows against a Csv file object
 *
 * @package League.csv
 * @since  4.2.1
 *
 */
class Statement
{
    use Validator;

    /**
     * Callables to filter the iterator
     *
     * @var callable[]
     */
    protected $filters = [];

    /**
     * Callables to sort the iterator
     *
     * @var callable[]
     */
    protected $sort_by = [];

    /**
     * iterator Offset
     *
     * @var int
     */
    protected $offset = 0;

    /**
     * iterator maximum length
     *
     * @var int
     */
    protected $limit = -1;

    /**
     * @inheritdoc
     */
    public function __set($property, $value)
    {
        throw new InvalidArgumentException(sprintf('%s is an undefined property', $property));
    }

    /**
     * @inheritdoc
     */
    public function __unset($property)
    {
        throw new InvalidArgumentException(sprintf('%s is an undefined property', $property));
    }

    /**
     * Returns a Record object
     *
     * @return RecordSet
     */
    public function process(AbstractCsv $csv)
    {
        $input_encoding = $csv->getInputEncoding();
        $use_converter = $this->useInternalConverter($csv);
        $header = $csv->getHeader();
        $header_offset = $csv->getHeaderOffset();
        $filters = [];
        if (null !== $header_offset) {
            $filters[] = function ($row, $index) use ($header_offset) {
                return $index !== $header_offset;
            };
        }

        $iterator = $this->applyBOMStripping($csv);
        $iterator = $this->applyIteratorFilter($iterator, $filters);
        $iterator = $this->applyIteratorSortBy($iterator);
        $iterator = new LimitIterator($iterator, $this->offset, $this->limit);
        if ($use_converter) {
            $iterator = $this->convertToUtf8($iterator, $input_encoding);
        }

        return new RecordSet($this->applyHeader($iterator, $header), $header);
    }

    /**
     * Set LimitIterator Offset
     *
     * @param $offset
     *
     * @return static
     */
    public function setOffset($offset)
    {
        $offset = $this->validateInteger($offset, 0, 'the offset must be a positive integer or 0');
        if ($offset === $this->offset) {
            return $this;
        }

        $clone = clone $this;
        $clone->offset = $offset;

        return $clone;
    }

    /**
     * Set LimitIterator Count
     *
     * @param int $limit
     *
     * @return static
     */
    public function setLimit($limit)
    {
        $limit = $this->validateInteger($limit, -1, 'the limit must an integer greater or equals to -1');
        if ($limit === $this->limit) {
            return $this;
        }

        $clone = clone $this;
        $clone->limit = $limit;

        return $clone;
    }

    /**
     * Set an Iterator sorting callable function
     *
     * @param callable $callable
     *
     * @return static
     */
    public function addSortBy(callable $callable)
    {
        $clone = clone $this;
        $clone->sort_by[] = $callable;

        return $clone;
    }

    /**
     * Set the Iterator filter method
     *
     * @param callable $callable
     *
     * @return static
     */
    public function addFilter(callable $callable)
    {
        $clone = clone $this;
        $clone->filters[] = $callable;

        return $clone;
    }

    /**
     * Remove the BOM sequence from the CSV
     *
     * @param AbstractCsv $csv
     *
     * @return Iterator
     */
    protected function applyBOMStripping(AbstractCsv $csv)
    {
        $bom = $csv->getInputBOM();
        if ('' === $bom) {
            return $csv->getIterator();
        }

        $enclosure = $csv->getEnclosure();
        $strip_bom = function ($row, $index) use ($bom, $enclosure) {
            if (0 != $index) {
                return $row;
            }

            return $this->stripBOM($row, $bom, $enclosure);
        };

        return new MapIterator($csv->getIterator(), $strip_bom);
    }

    /**
    * Filter the Iterator
    *
    * @param Iterator $iterator
    *
    * @return Iterator
    */
    protected function applyIteratorFilter(Iterator $iterator, array $filters)
    {
        $reducer = function ($iterator, $callable) {
            return new CallbackFilterIterator($iterator, $callable);
        };

        $filters[] = function ($row) {
            return is_array($row) && $row != [null];
        };

        return array_reduce(array_merge($filters, $this->filters), $reducer, $iterator);
    }

    /**
    * Sort the Iterator
    *
    * @param Iterator $iterator
    *
    * @return Iterator
    */
    protected function applyIteratorSortBy(Iterator $iterator)
    {
        if (empty($this->sort_by)) {
            return $iterator;
        }

        $obj = new ArrayIterator(iterator_to_array($iterator));
        $obj->uasort(function ($row_a, $row_b) {
            $res = 0;
            foreach ($this->sort_by as $compare) {
                if (0 !== ($res = call_user_func($compare, $row_a, $row_b))) {
                    break;
                }
            }

            return $res;
        });

        return $obj;
    }

    /**
     * Convert Iterator to UTF-8 if needed
     *
     * @param Iterator $iterator
     * @param string   $input_encoding
     *
     * @return Iterator
     */
    protected function convertToUtf8(Iterator $iterator, $input_encoding)
    {
        $convert_row = function ($row) use ($input_encoding) {
            return $this->convertRecord($row, $input_encoding);
        };

        return new MapIterator($iterator, $convert_row);
    }

    /**
     * Apply CSV header to the return iterator
     *
     * @param Iterator $iterator
     * @param array    $header
     *
     * @return Iterator
     */
    protected function applyHeader(Iterator $iterator, array $header)
    {
        if (empty($header)) {
            return $iterator;
        }

        $count = count($header);
        $combine_array = function (array $row) use ($header, $count) {
            if ($count != count($row)) {
                $row = array_slice(array_pad($row, $count, null), 0, $count);
            }

            return array_combine($header, $row);
        };

        return new MapIterator($iterator, $combine_array);
    }
}


1			<?php
2			/**
3			* This file is part of the League.csv library
4			*
5			* @license http://opensource.org/licenses/MIT
6			* @link https://github.com/thephpleague/csv/
7			* @version 8.1.1
8			* @package League.csv
9			*
10			* For the full copyright and license information, please view the LICENSE
11			* file that was distributed with this source code.
12			*/
13			namespace League\Csv;
14
15			use ArrayIterator;
16			use CallbackFilterIterator;
17			use InvalidArgumentException;
18			use Iterator;
19			use League\Csv\Config\Validator;
20			use LimitIterator;
21
22			/**
23			* A simple Statement class to fetch rows against a Csv file object
24			*
25			* @package League.csv
26			* @since 4.2.1
27			*
28			*/
29			class Statement
30			{
31			use Validator;
32
33			/**
34			* Callables to filter the iterator
35			*
36			* @var callable[]
37			*/
38			protected $filters = [];
39
40			/**
41			* Callables to sort the iterator
42			*
43			* @var callable[]
44			*/
45			protected $sort_by = [];
46
47			/**
48			* iterator Offset
49			*
50			* @var int
51			*/
52			protected $offset = 0;
53
54			/**
55			* iterator maximum length
56			*
57			* @var int
58			*/
59			protected $limit = -1;
60
61			/**
62			* @inheritdoc
63			*/
64			public function __set($property, $value)
65			{
66			throw new InvalidArgumentException(sprintf('%s is an undefined property', $property));
67			}
68
69			/**
70			* @inheritdoc
71			*/
72			public function __unset($property)
73			{
74			throw new InvalidArgumentException(sprintf('%s is an undefined property', $property));
75			}
76
77			/**
78			* Returns a Record object
79			*
80			* @return RecordSet
81			*/
82			public function process(AbstractCsv $csv)
83			{
84			$input_encoding = $csv->getInputEncoding();
85			$use_converter = $this->useInternalConverter($csv);
86			$header = $csv->getHeader();
87			$header_offset = $csv->getHeaderOffset();
88			$filters = [];
89			if (null !== $header_offset) {
90			$filters[] = function ($row, $index) use ($header_offset) {
91			return $index !== $header_offset;
92			};
93			}
94
95			$iterator = $this->applyBOMStripping($csv);
96			$iterator = $this->applyIteratorFilter($iterator, $filters);
97			$iterator = $this->applyIteratorSortBy($iterator);
98			$iterator = new LimitIterator($iterator, $this->offset, $this->limit);
99			if ($use_converter) {
100			$iterator = $this->convertToUtf8($iterator, $input_encoding);
101			}
102
103			return new RecordSet($this->applyHeader($iterator, $header), $header);
104			}
105
106			/**
107			* Set LimitIterator Offset
108			*
109			* @param $offset
110			*
111			* @return static
112			*/
113			public function setOffset($offset)
114			{
115			$offset = $this->validateInteger($offset, 0, 'the offset must be a positive integer or 0');
116			if ($offset === $this->offset) {
117			return $this;
118			}
119
120			$clone = clone $this;
121			$clone->offset = $offset;
122
123			return $clone;
124			}
125
126			/**
127			* Set LimitIterator Count
128			*
129			* @param int $limit
130			*
131			* @return static
132			*/
133			public function setLimit($limit)
134			{
135			$limit = $this->validateInteger($limit, -1, 'the limit must an integer greater or equals to -1');
136			if ($limit === $this->limit) {
137			return $this;
138			}
139
140			$clone = clone $this;
141			$clone->limit = $limit;
142
143			return $clone;
144			}
145
146			/**
147			* Set an Iterator sorting callable function
148			*
149			* @param callable $callable
150			*
151			* @return static
152			*/
153			public function addSortBy(callable $callable)
154			{
155			$clone = clone $this;
156			$clone->sort_by[] = $callable;
157
158			return $clone;
159			}
160
161			/**
162			* Set the Iterator filter method
163			*
164			* @param callable $callable
165			*
166			* @return static
167			*/
168			public function addFilter(callable $callable)
169			{
170			$clone = clone $this;
171			$clone->filters[] = $callable;
172
173			return $clone;
174			}
175
176			/**
177			* Remove the BOM sequence from the CSV
178			*
179			* @param AbstractCsv $csv
180			*
181			* @return Iterator
182			*/
183			protected function applyBOMStripping(AbstractCsv $csv)
184			{
185			$bom = $csv->getInputBOM();
186			if ('' === $bom) {
187			return $csv->getIterator();
188			}
189
190			$enclosure = $csv->getEnclosure();
191			$strip_bom = function ($row, $index) use ($bom, $enclosure) {
192			if (0 != $index) {
193			return $row;
194			}
195
196			return $this->stripBOM($row, $bom, $enclosure);
197			};
198
199			return new MapIterator($csv->getIterator(), $strip_bom);
200			}
201
202			/**
203			* Filter the Iterator
204			*
205			* @param Iterator $iterator
206			*
207			* @return Iterator
208			*/
209			protected function applyIteratorFilter(Iterator $iterator, array $filters)
210			{
211			$reducer = function ($iterator, $callable) {
212			return new CallbackFilterIterator($iterator, $callable);
213			};
214
215			$filters[] = function ($row) {
216			return is_array($row) && $row != [null];
217			};
218
219			return array_reduce(array_merge($filters, $this->filters), $reducer, $iterator);
220			}
221
222			/**
223			* Sort the Iterator
224			*
225			* @param Iterator $iterator
226			*
227			* @return Iterator
228			*/
229			protected function applyIteratorSortBy(Iterator $iterator)
230			{
231			if (empty($this->sort_by)) {
232			return $iterator;
233			}
234
235			$obj = new ArrayIterator(iterator_to_array($iterator));
236			$obj->uasort(function ($row_a, $row_b) {
237			$res = 0;
238			foreach ($this->sort_by as $compare) {
239			if (0 !== ($res = call_user_func($compare, $row_a, $row_b))) {
240			break;
241			}
242			}
243
244			return $res;
245			});
246
247			return $obj;
248			}
249
250			/**
251			* Convert Iterator to UTF-8 if needed
252			*
253			* @param Iterator $iterator
254			* @param string $input_encoding
255			*
256			* @return Iterator
257			*/
258			protected function convertToUtf8(Iterator $iterator, $input_encoding)
259			{
260			$convert_row = function ($row) use ($input_encoding) {
261			return $this->convertRecord($row, $input_encoding);
262			};
263
264			return new MapIterator($iterator, $convert_row);
265			}
266
267			/**
268			* Apply CSV header to the return iterator
269			*
270			* @param Iterator $iterator
271			* @param array $header
272			*
273			* @return Iterator
274			*/
275			protected function applyHeader(Iterator $iterator, array $header)
276			{
277			if (empty($header)) {
278			return $iterator;
279			}
280
281			$count = count($header);
282			$combine_array = function (array $row) use ($header, $count) {
283			if ($count != count($row)) {
284			$row = array_slice(array_pad($row, $count, null), 0, $count);
285			}
286
287			return array_combine($header, $row);
288			};
289
290			return new MapIterator($iterator, $combine_array);
291			}
292			}
293

thephpleague / csv

Pull Request — master (#178)

Statement::process() A

Complexity

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