Completed
Pull Request — master (#1984)
by Maciej
22:01
created

Query::__construct()   B

Complexity

Conditions 10
Paths 17

Size

Total Lines 36

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 26
CRAP Score 10

Importance

Changes 0
Metric Value
dl 0
loc 36
ccs 26
cts 26
cp 1
rs 7.6666
c 0
b 0
f 0
cc 10
nc 17
nop 9
crap 10

How to fix   Complexity    Many Parameters   

Long Method

Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.

For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.

Commonly applied refactorings include:

Many Parameters

Methods with many parameters are not only hard to understand, but their parameters also often become inconsistent when you need more, or different data.

There are several approaches to avoid long parameter lists:

1
<?php
2
3
declare(strict_types=1);
4
5
namespace Doctrine\ODM\MongoDB\Query;
6
7
use BadMethodCallException;
8
use Doctrine\ODM\MongoDB\DocumentManager;
9
use Doctrine\ODM\MongoDB\Iterator\CachingIterator;
10
use Doctrine\ODM\MongoDB\Iterator\HydratingIterator;
11
use Doctrine\ODM\MongoDB\Iterator\Iterator;
12
use Doctrine\ODM\MongoDB\Iterator\PrimingIterator;
13
use Doctrine\ODM\MongoDB\Mapping\ClassMetadata;
14
use Doctrine\ODM\MongoDB\MongoDBException;
15
use InvalidArgumentException;
16
use IteratorAggregate;
17
use MongoDB\Collection;
18
use MongoDB\DeleteResult;
19
use MongoDB\Driver\Cursor;
20
use MongoDB\InsertOneResult;
21
use MongoDB\Operation\FindOneAndUpdate;
22
use MongoDB\UpdateResult;
23
use UnexpectedValueException;
24
use function array_combine;
25
use function array_filter;
26
use function array_flip;
27
use function array_intersect_key;
28
use function array_keys;
29
use function array_map;
30
use function array_merge;
31
use function array_values;
32
use function assert;
33
use function is_array;
34
use function is_callable;
35
use function is_string;
36
use function key;
37
use function reset;
38
39
/**
40
 * ODM Query wraps the raw Doctrine MongoDB queries to add additional functionality
41
 * and to hydrate the raw arrays of data to Doctrine document objects.
42
 */
43
final class Query implements IteratorAggregate
44
{
45
    public const TYPE_FIND            = 1;
46
    public const TYPE_FIND_AND_UPDATE = 2;
47
    public const TYPE_FIND_AND_REMOVE = 3;
48
    public const TYPE_INSERT          = 4;
49
    public const TYPE_UPDATE          = 5;
50
    public const TYPE_REMOVE          = 6;
51
    public const TYPE_DISTINCT        = 9;
52
    public const TYPE_COUNT           = 11;
53
54
    public const HINT_REFRESH = 1;
55
    // 2 was used for HINT_SLAVE_OKAY, which was removed in 2.0
56
    public const HINT_READ_PREFERENCE = 3;
57
    public const HINT_READ_ONLY       = 5;
58
59
    /**
60
     * The DocumentManager instance.
61
     *
62
     * @var DocumentManager
63
     */
64
    private $dm;
65
66
    /**
67
     * The ClassMetadata instance.
68
     *
69
     * @var ClassMetadata
70
     */
71
    private $class;
72
73
    /**
74
     * Whether to hydrate results as document class instances.
75
     *
76
     * @var bool
77
     */
78
    private $hydrate = true;
79
80
    /**
81
     * Array of primer Closure instances.
82
     *
83
     * @var array
84
     */
85
    private $primers = [];
86
87
    /**
88
     * Hints for UnitOfWork behavior.
89
     *
90
     * @var array
91
     */
92
    private $unitOfWorkHints = [];
93
94
    /**
95
     * The Collection instance.
96
     *
97
     * @var Collection
98
     */
99
    protected $collection;
100
101
    /**
102
     * Query structure generated by the Builder class.
103
     *
104
     * @var array
105
     */
106
    private $query;
107
108
    /** @var Iterator|null */
109
    private $iterator;
110
111
    /**
112
     * Query options
113
     *
114
     * @var array
115
     */
116
    private $options;
117
118 164
    public function __construct(DocumentManager $dm, ClassMetadata $class, Collection $collection, array $query = [], array $options = [], bool $hydrate = true, bool $refresh = false, array $primers = [], bool $readOnly = false)
119
    {
120 164
        $primers = array_filter($primers);
121
122 164
        switch ($query['type']) {
123 164
            case self::TYPE_FIND:
124 39
            case self::TYPE_FIND_AND_UPDATE:
125 27
            case self::TYPE_FIND_AND_REMOVE:
126 24
            case self::TYPE_INSERT:
127 23
            case self::TYPE_UPDATE:
128 8
            case self::TYPE_REMOVE:
129 6
            case self::TYPE_DISTINCT:
130 4
            case self::TYPE_COUNT:
131 163
                break;
132
133
            default:
134 1
                throw new InvalidArgumentException('Invalid query type: ' . $query['type']);
135
        }
136
137 163
        $this->collection = $collection;
138 163
        $this->query      = $query;
139 163
        $this->options    = $options;
140 163
        $this->dm         = $dm;
141 163
        $this->class      = $class;
142 163
        $this->hydrate    = $hydrate;
143 163
        $this->primers    = $primers;
144
145 163
        $this->setReadOnly($readOnly);
146 163
        $this->setRefresh($refresh);
147
148 163
        if (! isset($query['readPreference'])) {
149 157
            return;
150
        }
151
152 6
        $this->unitOfWorkHints[self::HINT_READ_PREFERENCE] = $query['readPreference'];
153 6
    }
154
155 64
    public function __clone()
156
    {
157 64
        $this->iterator = null;
158 64
    }
159
160
    /**
161
     * Return an array of information about the query structure for debugging.
162
     *
163
     * The $name parameter may be used to return a specific key from the
164
     * internal $query array property. If omitted, the entire array will be
165
     * returned.
166
     */
167 27
    public function debug(?string $name = null)
168
    {
169 27
        return $name !== null ? $this->query[$name] : $this->query;
170
    }
171
172
    /**
173
     * Execute the query and returns the results.
174
     *
175
     * @return Iterator|UpdateResult|InsertOneResult|DeleteResult|array|object|int|null
176
     *
177
     * @throws MongoDBException
178
     */
179 123
    public function execute()
180
    {
181 123
        $results = $this->runQuery();
182
183 122
        if (! $this->hydrate) {
184 9
            return $results;
185
        }
186
187 116
        $uow = $this->dm->getUnitOfWork();
188
189
        /* If a single document is returned from a findAndModify command and it
190
         * includes the identifier field, attempt hydration.
191
         */
192 116
        if (($this->query['type'] === self::TYPE_FIND_AND_UPDATE ||
193 116
                $this->query['type'] === self::TYPE_FIND_AND_REMOVE) &&
194 116
            is_array($results) && isset($results['_id'])) {
195 5
            $results = $uow->getOrCreateDocument($this->class->name, $results, $this->unitOfWorkHints);
196
197 5
            if (! empty($this->primers)) {
198 1
                $referencePrimer = new ReferencePrimer($this->dm, $uow);
199
200 1
                foreach ($this->primers as $fieldName => $primer) {
201 1
                    $primer = is_callable($primer) ? $primer : null;
202 1
                    $referencePrimer->primeReferences($this->class, [$results], $fieldName, $this->unitOfWorkHints, $primer);
203
                }
204
            }
205
        }
206
207 116
        return $results;
208
    }
209
210
    /**
211
     * Gets the ClassMetadata instance.
212
     */
213
    public function getClass() : ClassMetadata
214
    {
215
        return $this->class;
216
    }
217
218
    public function getDocumentManager() : DocumentManager
219
    {
220
        return $this->dm;
221
    }
222
223
    /**
224
     * Execute the query and return its result, which must be an Iterator.
225
     *
226
     * If the query type is not expected to return an Iterator,
227
     * BadMethodCallException will be thrown before executing the query.
228
     * Otherwise, the query will be executed and UnexpectedValueException will
229
     * be thrown if {@link Query::execute()} does not return an Iterator.
230
     *
231
     * @see http://php.net/manual/en/iteratoraggregate.getiterator.php
232
     *
233
     * @throws BadMethodCallException If the query type would not return an Iterator.
234
     * @throws UnexpectedValueException If the query did not return an Iterator.
235
     * @throws MongoDBException
236
     */
237 83
    public function getIterator() : Iterator
238
    {
239 83
        switch ($this->query['type']) {
240 83
            case self::TYPE_FIND:
241 6
            case self::TYPE_DISTINCT:
242 77
                break;
243
244
            default:
245 6
                throw new BadMethodCallException('Iterator would not be returned for query type: ' . $this->query['type']);
246
        }
247
248 77
        if ($this->iterator === null) {
249 77
            $result = $this->execute();
250 77
            if (! $result instanceof Iterator) {
251
                throw new UnexpectedValueException('Iterator was not returned for query type: ' . $this->query['type']);
252
            }
253 77
            $this->iterator = $result;
254
        }
255
256 77
        return $this->iterator;
257
    }
258
259
    /**
260
     * Return the query structure.
261
     */
262 14
    public function getQuery() : array
263
    {
264 14
        return $this->query;
265
    }
266
267
    /**
268
     * Execute the query and return the first result.
269
     *
270
     * @return array|object|null
271
     */
272 64
    public function getSingleResult()
273
    {
274 64
        $clonedQuery                 = clone $this;
275 64
        $clonedQuery->query['limit'] = 1;
276 64
        return $clonedQuery->getIterator()->current() ?: null;
0 ignored issues
show
Bug introduced by
It seems like you code against a concrete implementation and not the interface Traversable as the method current() does only exist in the following implementations of said interface: APCUIterator, AppendIterator, ArrayIterator, CachingIterator, CallbackFilterIterator, DirectoryIterator, Doctrine\ODM\MongoDB\Iterator\CachingIterator, Doctrine\ODM\MongoDB\Iterator\HydratingIterator, Doctrine\ODM\MongoDB\Iterator\PrimingIterator, Doctrine\ODM\MongoDB\Tools\Console\MetadataFilter, EmptyIterator, FilesystemIterator, FilterIterator, Generator, GlobIterator, HttpMessage, HttpRequestPool, Imagick, ImagickPixelIterator, InfiniteIterator, IteratorIterator, LimitIterator, MongoCommandCursor, MongoCursor, MongoGridFSCursor, MultipleIterator, NoRewindIterator, ParentIterator, Phar, PharData, RecursiveArrayIterator, RecursiveCachingIterator, RecursiveCallbackFilterIterator, RecursiveDirectoryIterator, RecursiveFilterIterator, RecursiveIteratorIterator, RecursiveRegexIterator, RecursiveTreeIterator, RegexIterator, SQLiteResult, SimpleXMLIterator, SplDoublyLinkedList, SplFileObject, SplFixedArray, SplHeap, SplMaxHeap, SplMinHeap, SplObjectStorage, SplPriorityQueue, SplQueue, SplStack, SplTempFileObject.

Let’s take a look at an example:

interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}

In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.

Available Fixes

  1. Change the type-hint for the parameter:

    class AuthSystem
    {
        public function authenticate(MyUser $user) { /* ... */ }
    }
    
  2. Add an additional type-check:

    class AuthSystem
    {
        public function authenticate(User $user)
        {
            if ($user instanceof MyUser) {
                $this->logger->info(/** ... */);
            }
    
            // or alternatively
            if ( ! $user instanceof MyUser) {
                throw new \LogicException(
                    '$user must be an instance of MyUser, '
                   .'other instances are not supported.'
                );
            }
    
        }
    }
    
Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case.
  1. Add the method to the interface:

    interface User
    {
        /** @return string */
        public function getPassword();
    
        /** @return string */
        public function getDisplayName();
    }
    
Loading history...
277
    }
278
279
    /**
280
     * Return the query type.
281
     */
282
    public function getType() : int
283
    {
284
        return $this->query['type'];
285
    }
286
287
    /**
288
     * Sets whether or not to hydrate the documents to objects.
289
     */
290
    public function setHydrate(bool $hydrate) : void
291
    {
292
        $this->hydrate = $hydrate;
293
    }
294
295
    /**
296
     * Set whether documents should be registered in UnitOfWork. If document would
297
     * already be managed it will be left intact and new instance returned.
298
     *
299
     * This option has no effect if hydration is disabled.
300
     */
301 163
    public function setReadOnly(bool $readOnly) : void
302
    {
303 163
        $this->unitOfWorkHints[self::HINT_READ_ONLY] = $readOnly;
304 163
    }
305
306
    /**
307
     * Set whether to refresh hydrated documents that are already in the
308
     * identity map.
309
     *
310
     * This option has no effect if hydration is disabled.
311
     */
312 163
    public function setRefresh(bool $refresh) : void
313
    {
314 163
        $this->unitOfWorkHints[self::HINT_REFRESH] = $refresh;
315 163
    }
316
317
    /**
318
     * Execute the query and return its results as an array.
319
     *
320
     * @see IteratorAggregate::toArray()
321
     */
322 11
    public function toArray() : array
323
    {
324 11
        return $this->getIterator()->toArray();
0 ignored issues
show
Bug introduced by
It seems like you code against a concrete implementation and not the interface Traversable as the method toArray() does only exist in the following implementations of said interface: Doctrine\ODM\MongoDB\Iterator\CachingIterator, Doctrine\ODM\MongoDB\Iterator\PrimingIterator, Doctrine\ODM\MongoDB\Query\Query, SplFixedArray.

Let’s take a look at an example:

interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}

In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.

Available Fixes

  1. Change the type-hint for the parameter:

    class AuthSystem
    {
        public function authenticate(MyUser $user) { /* ... */ }
    }
    
  2. Add an additional type-check:

    class AuthSystem
    {
        public function authenticate(User $user)
        {
            if ($user instanceof MyUser) {
                $this->logger->info(/** ... */);
            }
    
            // or alternatively
            if ( ! $user instanceof MyUser) {
                throw new \LogicException(
                    '$user must be an instance of MyUser, '
                   .'other instances are not supported.'
                );
            }
    
        }
    }
    
Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case.
  1. Add the method to the interface:

    interface User
    {
        /** @return string */
        public function getPassword();
    
        /** @return string */
        public function getDisplayName();
    }
    
Loading history...
325
    }
326
327
    /**
328
     * Returns an array containing the specified keys and their values from the
329
     * query array, provided they exist and are not null.
330
     */
331 121
    private function getQueryOptions(string ...$keys) : array
332
    {
333 121
        return array_filter(
334 121
            array_intersect_key($this->query, array_flip($keys)),
335
            static function ($value) {
336 84
                return $value !== null;
337 121
            }
338
        );
339
    }
340
341 106
    private function makeIterator(Cursor $cursor) : Iterator
342
    {
343 106
        if ($this->hydrate) {
344 98
            $cursor = new HydratingIterator($cursor, $this->dm->getUnitOfWork(), $this->class, $this->unitOfWorkHints);
345
        }
346
347 106
        $cursor = new CachingIterator($cursor);
348
349 106
        if (! empty($this->primers)) {
350 20
            $referencePrimer = new ReferencePrimer($this->dm, $this->dm->getUnitOfWork());
351 20
            $cursor          = new PrimingIterator($cursor, $this->class, $referencePrimer, $this->primers, $this->unitOfWorkHints);
352
        }
353
354 106
        return $cursor;
355
    }
356
357
    /**
358
     * Returns an array with its keys renamed based on the translation map.
359
     *
360
     * @return array $rename Translation map (from => to) for renaming keys
361
     */
362 111
    private function renameQueryOptions(array $options, array $rename) : array
363
    {
364 111
        if (empty($options)) {
365 44
            return $options;
366
        }
367
368 82
        $options = array_combine(
369 82
            array_map(
370
                static function ($key) use ($rename) {
371 82
                    return $rename[$key] ?? $key;
372 82
                },
373 82
                array_keys($options)
374
            ),
375 82
            array_values($options)
376
        );
377
378
        // Necessary because of https://github.com/phpstan/phpstan/issues/1580
379 82
        assert($options !== false);
380
381 82
        return $options;
382
    }
383
384
    /**
385
     * Execute the query and return its result.
386
     *
387
     * The return value will vary based on the query type. Commands with results
388
     * (e.g. aggregate, inline mapReduce) may return an ArrayIterator. Other
389
     * commands and operations may return a status array or a boolean, depending
390
     * on the driver's write concern. Queries and some mapReduce commands will
391
     * return an Iterator.
392
     *
393
     * @return Iterator|UpdateResult|InsertOneResult|DeleteResult|array|object|int|null
394
     */
395 123
    public function runQuery()
396
    {
397 123
        $options = $this->options;
398
399 123
        switch ($this->query['type']) {
400 123
            case self::TYPE_FIND:
401 106
                $queryOptions = $this->getQueryOptions('select', 'sort', 'skip', 'limit', 'readPreference');
402 106
                $queryOptions = $this->renameQueryOptions($queryOptions, ['select' => 'projection']);
403
404 106
                $cursor = $this->collection->find(
405 106
                    $this->query['query'],
406 106
                    $queryOptions
407
                );
408
409 106
                return $this->makeIterator($cursor);
410
411 25
            case self::TYPE_FIND_AND_UPDATE:
412 6
                $queryOptions                   = $this->getQueryOptions('select', 'sort', 'upsert');
413 6
                $queryOptions                   = $this->renameQueryOptions($queryOptions, ['select' => 'projection']);
414 6
                $queryOptions['returnDocument'] = $this->query['new'] ?? false ? FindOneAndUpdate::RETURN_DOCUMENT_AFTER : FindOneAndUpdate::RETURN_DOCUMENT_BEFORE;
415
416 6
                $operation = $this->isFirstKeyUpdateOperator() ? 'findOneAndUpdate' : 'findOneAndReplace';
417
418 6
                return $this->collection->{$operation}(
419 6
                    $this->query['query'],
420 6
                    $this->query['newObj'],
421 6
                    array_merge($options, $queryOptions)
422
                );
423
424 20
            case self::TYPE_FIND_AND_REMOVE:
425 2
                $queryOptions = $this->getQueryOptions('select', 'sort');
426 2
                $queryOptions = $this->renameQueryOptions($queryOptions, ['select' => 'projection']);
427
428 2
                return $this->collection->findOneAndDelete(
429 2
                    $this->query['query'],
430 2
                    array_merge($options, $queryOptions)
431
                );
432
433 18
            case self::TYPE_INSERT:
434
                return $this->collection->insertOne($this->query['newObj'], $options);
435
436 18
            case self::TYPE_UPDATE:
437 13
                $multiple = $this->query['multiple'] ?? false;
438
439 13
                if ($this->isFirstKeyUpdateOperator()) {
440 12
                    $operation = 'updateOne';
441
                } else {
442 1
                    if ($multiple) {
443 1
                        throw new InvalidArgumentException('Combining the "multiple" option without using an update operator as first operation in a query is not supported.');
444
                    }
445
446
                    $operation = 'replaceOne';
447
                }
448
449 12
                if ($multiple) {
450 2
                    return $this->collection->updateMany(
451 2
                        $this->query['query'],
452 2
                        $this->query['newObj'],
453 2
                        array_merge($options, $this->getQueryOptions('upsert'))
454
                    );
455
                }
456
457 10
                return $this->collection->{$operation}(
458 10
                    $this->query['query'],
459 10
                    $this->query['newObj'],
460 10
                    array_merge($options, $this->getQueryOptions('upsert'))
461
                );
462
463 5
            case self::TYPE_REMOVE:
464 1
                return $this->collection->deleteMany($this->query['query'], $options);
465
466 4
            case self::TYPE_DISTINCT:
467 2
                $collection = $this->collection;
468 2
                $query      = $this->query;
469
470 2
                return $collection->distinct(
471 2
                    $query['distinct'],
472 2
                    $query['query'],
473 2
                    array_merge($options, $this->getQueryOptions('readPreference'))
474
                );
475
476 2
            case self::TYPE_COUNT:
477 2
                $collection = $this->collection;
478 2
                $query      = $this->query;
479
480 2
                return $collection->count(
481 2
                    $query['query'],
482 2
                    array_merge($options, $this->getQueryOptions('hint', 'limit', 'skip', 'readPreference'))
483
                );
484
485
            default:
486
                throw new InvalidArgumentException('Invalid query type: ' . $this->query['type']);
487
        }
488
    }
489
490 19
    private function isFirstKeyUpdateOperator() : bool
491
    {
492 19
        reset($this->query['newObj']);
493 19
        $firstKey = key($this->query['newObj']);
494
495 19
        return is_string($firstKey) && $firstKey[0] === '$';
496
    }
497
}
498