QueryCallbackBuilder::setReference() - Code Metrics - Inspection of "IsDefinite query flag supported" - remorhaz/php-json-path - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( c2f53d...1e149c )

by Edward

created 2019-07-23 20:21 UTC

QueryCallbackBuilder::setReference() A

↳ Parent: QueryCallbackBuilder

Complexity

Conditions	2
Paths	2

Size

Total Lines	7
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	2
eloc	3
c	0
b	0
f	0
nc	2
nop	2
dl	0
loc	7
rs	10

<?php
declare(strict_types=1);

namespace Remorhaz\JSON\Path\Query;

use function array_map;
use PhpParser\BuilderFactory;
use PhpParser\Node\Arg;
use PhpParser\Node\Expr;
use PhpParser\Node\Expr\Assign;
use PhpParser\Node\Stmt\Expression;
use PhpParser\Node\Stmt\Return_;
use PhpParser\PrettyPrinter\Standard;
use Remorhaz\JSON\Data\Value\NodeValueInterface;
use Remorhaz\JSON\Path\Value\ValueListInterface;
use Remorhaz\JSON\Path\Runtime\RuntimeInterface;
use Remorhaz\UniLex\AST\AbstractTranslatorListener;
use Remorhaz\UniLex\AST\Node;
use Remorhaz\UniLex\Exception as UniLexException;
use Remorhaz\UniLex\Stack\PushInterface;

final class QueryCallbackBuilder extends AbstractTranslatorListener
{

    private $php;

    private $references = [];

    private $runtime;

    private $input;

    private $stmts = [];

    private $queryCallback;

    private $isDefinite;

    public function __construct()
    {
        $this->php = new BuilderFactory;
    }

    public function getQueryCallback(): callable
    {
        if (isset($this->queryCallback)) {
            return $this->queryCallback;
        }

        throw new Exception\QueryCallbackNotFoundException;
    }

    public function isDefinite(): bool
    {
        if (isset($this->isDefinite)) {
            return $this->isDefinite;
        }

        throw new Exception\IsDefiniteFlagNotFoundException;
    }

    public function onStart(Node $node): void
    {
        $this->runtime = $this->php->var('runtime');
        $this->input = $this->php->var('input');
    }

    public function onFinish(): void
    {
        $runtimeParam = $this
            ->php
            ->param('runtime')
            ->setType(RuntimeInterface::class)
            ->getNode();
        $inputParam = $this
            ->php
            ->param('input')
            ->setType(NodeValueInterface::class)
            ->getNode();
        $stmts = array_map(
            function (\PhpParser\Node $stmt): \PhpParser\Node {
                return $stmt instanceof Expr ? new Expression($stmt): $stmt;
            },
            $this->stmts
        );

        $closure = new Expr\Closure(
            [
                'stmts' => $stmts,
                'returnType' => ValueListInterface::class,
                'params' => [$runtimeParam, $inputParam],
            ]
        );
        $return = new Return_($closure);

        $callbackCode = (new Standard)->prettyPrint([$return]);
        $this->queryCallback = eval($callbackCode);

    }

    public function onBeginProduction(Node $node, PushInterface $stack): void
    {
        $stack->push(...$node->getChildList());
    }

    /**
     * @param Node $node
     * @throws UniLexException
     */
    public function onFinishProduction(Node $node): void
    {
        if ($this->hasReference($node)) {
            return;
        }
        switch ($node->getName()) {
            case QueryAstNodeType::GET_INPUT:
                $this->addMethodCall(
                    $node,
                    'getInput',
                    $this->input
                );
                break;

            case QueryAstNodeType::SET_OUTPUT:
                $this->isDefinite = $node->getAttribute('is_definite');
                $this->stmts[] = new Return_($this->getReference($node->getChild(0)));
                break;

            case QueryAstNodeType::CREATE_FILTER_CONTEXT:
                $this->addMethodCall(
                    $node,
                    'createFilterContext',
                    $this->getReference($node->getChild(0))
                );
                break;

            case QueryAstNodeType::SPLIT:
                $this->addMethodCall(
                    $node,
                    'split',
                    $this->getReference($node->getChild(0))
                );
                break;

            case QueryAstNodeType::EVALUATE:
                $this->addMethodCall(
                    $node,
                    'evaluate',
                    $this->getReference($node->getChild(0)),
                    $this->getReference($node->getChild(1))
                );
                break;

            case QueryAstNodeType::FILTER:
                $this->addMethodCall(
                    $node,
                    'filter',
                    $this->getReference($node->getChild(0)),
                    $this->getReference($node->getChild(1))
                );
                break;

            case QueryAstNodeType::EVALUATE_LOGICAL_OR:
                $this->addMethodCall(
                    $node,
                    'evaluateLogicalOr',
                    $this->getReference($node->getChild(0)),
                    $this->getReference($node->getChild(1))
                );
                break;

            case QueryAstNodeType::EVALUATE_LOGICAL_AND:
                $this->addMethodCall(
                    $node,
                    'evaluateLogicalAnd',
                    $this->getReference($node->getChild(0)),
                    $this->getReference($node->getChild(1))
                );
                break;

            case QueryAstNodeType::EVALUATE_LOGICAL_NOT:
                $this->addMethodCall(
                    $node,
                    'evaluateLogicalNot',
                    $this->getReference($node->getChild(0))
                );
                break;

            case QueryAstNodeType::CALCULATE_IS_EQUAL:
                $this->addMethodCall(
                    $node,
                    'calculateIsEqual',
                    $this->getReference($node->getChild(0)),
                    $this->getReference($node->getChild(1))
                );
                break;

            case QueryAstNodeType::CALCULATE_IS_GREATER:
                $this->addMethodCall(
                    $node,
                    'calculateIsGreater',
                    $this->getReference($node->getChild(0)),
                    $this->getReference($node->getChild(1))
                );
                break;

            case QueryAstNodeType::CALCULATE_IS_REGEXP:
                $this->addMethodCall(
                    $node,
                    'calculateIsRegExp',
                    $this->php->val($node->getAttribute('pattern')),
                    $this->getReference($node->getChild(0))
                );
                break;

            case QueryAstNodeType::FETCH_CHILDREN:
                $this->addMethodCall(
                    $node,
                    'fetchChildren',
                    $this->getReference($node->getChild(0)),
                    new Arg(
                        $this->getReference($node->getChild(1)),
                        false,
                        true
                    )
                );
                break;

            case QueryAstNodeType::FETCH_CHILDREN_DEEP:
                $this->addMethodCall(
                    $node,
                    'fetchChildrenDeep',
                    $this->getReference($node->getChild(0)),
                    new Arg(
                        $this->getReference($node->getChild(1)),
                        false,
                        true
                    )
                );
                break;

            case QueryAstNodeType::MATCH_ANY_CHILD:
                $this->addMethodCall(
                    $node,
                    'matchAnyChild',
                    $this->getReference($node->getChild(0))
                );
                break;

            case QueryAstNodeType::MATCH_PROPERTY_STRICTLY:
                $this->addMethodCall(
                    $node,
                    'matchPropertyStrictly',
                    $this->getReference($node->getChild(0)),
                );
                break;

            case QueryAstNodeType::MATCH_ELEMENT_STRICTLY:
                $this->addMethodCall(
                    $node,
                    'matchElementStrictly',
                    $this->getReference($node->getChild(0)),
                );
                break;

            case QueryAstNodeType::AGGREGATE:
                $this->addMethodCall(
                    $node,
                    'aggregate',
                    $this->php->val($node->getAttribute('name')),
                    $this->getReference($node->getChild(0)),
                );
                break;

            case QueryAstNodeType::POPULATE_LITERAL:
                $this->addMethodCall(
                    $node,
                    'populateLiteral',
                    $this->getReference($node->getChild(0)),
                    $this->getReference($node->getChild(1))
                );
                break;

            case QueryAstNodeType::POPULATE_LITERAL_ARRAY:
                $this->addMethodCall(
                    $node,
                    'populateLiteralArray',
                    $this->getReference($node->getChild(0)),
                    new Arg(
                        $this->getReference($node->getChild(1)),
                        false,
                        true
                    )
                );
                break;

            case QueryAstNodeType::POPULATE_INDEX_LIST:
                $this->addMethodCall(
                    $node,
                    'populateIndexList',
                    $this->getReference($node->getChild(0)),
                    ...array_map(
                        [$this->php, 'val'],
                        $node->getAttribute('indexList')
                    )
                );
                break;

            case QueryAstNodeType::POPULATE_INDEX_SLICE:
                $attributes = $node->getAttributeList();
                $this->addMethodCall(
                    $node,
                    'populateIndexSlice',
                    $this->getReference($node->getChild(0)),
                    $this->php->val($attributes['start'] ?? null),
                    $this->php->val($attributes['end'] ?? null),
                    $this->php->val($attributes['step'] ?? null)
                );

                break;

            case QueryAstNodeType::POPULATE_NAME_LIST:
                $this->addMethodCall(
                    $node,
                    'populateNameList',
                    $this->getReference($node->getChild(0)),
                    ...array_map(
                        [$this->php, 'val'],
                        $node->getAttribute('nameList')
                    )
                );
                break;

            case QueryAstNodeType::CREATE_SCALAR:
                $attributes = $node->getAttributeList();
                // TODO: allow accessing null attributes
                $value = $this->php->val($attributes['value'] ?? null);
                $this->addMethodCall(
                    $node,
                    'createScalar',
                    $value
                );
                break;

            case QueryAstNodeType::CREATE_ARRAY:
                // [ X:APPEND_TO_ARRAY ]
                $items = [];
                foreach ($node->getChildList() as $child) {
                    $items[] = $this->getReference($child);
                }
                $this->stmts[] = new Assign(
                    $this->createReference($node),
                    $this->php->val($items)
                );
                break;

            case QueryAstNodeType::APPEND_TO_ARRAY:
                // [ 0:<value> ]
                $this->setReference(
                    $node,
                    $this->getReference($node->getChild(0))
                );
                break;
        }
    }

    private function getVarName(Node $node): string
    {
        return "var{$node->getId()}";
    }

    private function createReference(Node $node): Expr
    {
        $reference = $this->php->var($this->getVarName($node));
        $this->setReference($node, $reference);

        return $reference;
    }

    private function setReference(Node $node, Expr $expr): void
    {
        if (isset($this->references[$node->getId()])) {
            throw new Exception\ReferenceAlreadyExistsException($node->getId());
        }

        $this->references[$node->getId()] = $expr;
    }

    private function hasReference(Node $node): bool
    {
        return isset($this->references[$node->getId()]);
    }

    private function getReference(Node $node): Expr
    {
        if (!isset($this->references[$node->getId()])) {
            throw new Exception\ReferenceNotFoundException($node->getId());
        }

        return $this->references[$node->getId()];
    }

    private function addMethodCall(Node $node, string $method, \PhpParser\Node ...$args): void
    {
        $methodCall = $this
            ->php
            ->methodCall($this->runtime, $method, $args);
        $this->stmts[] = new Assign($this->createReference($node), $methodCall);
    }
}


1			<?php
2			declare(strict_types=1);
3
4			namespace Remorhaz\JSON\Path\Query;
5
6			use function array_map;
7			use PhpParser\BuilderFactory;
8			use PhpParser\Node\Arg;
9			use PhpParser\Node\Expr;
10			use PhpParser\Node\Expr\Assign;
11			use PhpParser\Node\Stmt\Expression;
12			use PhpParser\Node\Stmt\Return_;
13			use PhpParser\PrettyPrinter\Standard;
14			use Remorhaz\JSON\Data\Value\NodeValueInterface;
15			use Remorhaz\JSON\Path\Value\ValueListInterface;
16			use Remorhaz\JSON\Path\Runtime\RuntimeInterface;
17			use Remorhaz\UniLex\AST\AbstractTranslatorListener;
18			use Remorhaz\UniLex\AST\Node;
19			use Remorhaz\UniLex\Exception as UniLexException;
20			use Remorhaz\UniLex\Stack\PushInterface;
21
22			final class QueryCallbackBuilder extends AbstractTranslatorListener
23			{
24
25			private $php;
26
27			private $references = [];
28
29			private $runtime;
30
31			private $input;
32
33			private $stmts = [];
34
35			private $queryCallback;
36
37			private $isDefinite;
38
39			public function __construct()
40			{
41			$this->php = new BuilderFactory;
42			}
43
44			public function getQueryCallback(): callable
45			{
46			if (isset($this->queryCallback)) {
47			return $this->queryCallback;
48			}
49
50			throw new Exception\QueryCallbackNotFoundException;
51			}
52
53			public function isDefinite(): bool
54			{
55			if (isset($this->isDefinite)) {
56			return $this->isDefinite;
57			}
58
59			throw new Exception\IsDefiniteFlagNotFoundException;
60			}
61
62			public function onStart(Node $node): void
63			{
64			$this->runtime = $this->php->var('runtime');
65			$this->input = $this->php->var('input');
66			}
67
68			public function onFinish(): void
69			{
70			$runtimeParam = $this
71			->php
72			->param('runtime')
73			->setType(RuntimeInterface::class)
74			->getNode();
75			$inputParam = $this
76			->php
77			->param('input')
78			->setType(NodeValueInterface::class)
79			->getNode();
80			$stmts = array_map(
81			function (\PhpParser\Node $stmt): \PhpParser\Node {
82			return $stmt instanceof Expr ? new Expression($stmt): $stmt;
83			},
84			$this->stmts
85			);
86
87			$closure = new Expr\Closure(
88			[
89			'stmts' => $stmts,
90			'returnType' => ValueListInterface::class,
91			'params' => [$runtimeParam, $inputParam],
92			]
93			);
94			$return = new Return_($closure);
95
96			$callbackCode = (new Standard)->prettyPrint([$return]);
97			$this->queryCallback = eval($callbackCode);
			1 ignored issue – show introduced 2019-07-22 18:39 UTC by Report Bug Copy Issue Report The use of eval() is discouraged. Loading history...
98			}
99
100			public function onBeginProduction(Node $node, PushInterface $stack): void
101			{
102			$stack->push(...$node->getChildList());
103			}
104
105			/**
106			* @param Node $node
107			* @throws UniLexException
108			*/
109			public function onFinishProduction(Node $node): void
110			{
111			if ($this->hasReference($node)) {
112			return;
113			}
114			switch ($node->getName()) {
115			case QueryAstNodeType::GET_INPUT:
116			$this->addMethodCall(
117			$node,
118			'getInput',
119			$this->input
120			);
121			break;
122
123			case QueryAstNodeType::SET_OUTPUT:
124			$this->isDefinite = $node->getAttribute('is_definite');
125			$this->stmts[] = new Return_($this->getReference($node->getChild(0)));
126			break;
127
128			case QueryAstNodeType::CREATE_FILTER_CONTEXT:
129			$this->addMethodCall(
130			$node,
131			'createFilterContext',
132			$this->getReference($node->getChild(0))
133			);
134			break;
135
136			case QueryAstNodeType::SPLIT:
137			$this->addMethodCall(
138			$node,
139			'split',
140			$this->getReference($node->getChild(0))
141			);
142			break;
143
144			case QueryAstNodeType::EVALUATE:
145			$this->addMethodCall(
146			$node,
147			'evaluate',
148			$this->getReference($node->getChild(0)),
149			$this->getReference($node->getChild(1))
150			);
151			break;
152
153			case QueryAstNodeType::FILTER:
154			$this->addMethodCall(
155			$node,
156			'filter',
157			$this->getReference($node->getChild(0)),
158			$this->getReference($node->getChild(1))
159			);
160			break;
161
162			case QueryAstNodeType::EVALUATE_LOGICAL_OR:
163			$this->addMethodCall(
164			$node,
165			'evaluateLogicalOr',
166			$this->getReference($node->getChild(0)),
167			$this->getReference($node->getChild(1))
168			);
169			break;
170
171			case QueryAstNodeType::EVALUATE_LOGICAL_AND:
172			$this->addMethodCall(
173			$node,
174			'evaluateLogicalAnd',
175			$this->getReference($node->getChild(0)),
176			$this->getReference($node->getChild(1))
177			);
178			break;
179
180			case QueryAstNodeType::EVALUATE_LOGICAL_NOT:
181			$this->addMethodCall(
182			$node,
183			'evaluateLogicalNot',
184			$this->getReference($node->getChild(0))
185			);
186			break;
187
188			case QueryAstNodeType::CALCULATE_IS_EQUAL:
189			$this->addMethodCall(
190			$node,
191			'calculateIsEqual',
192			$this->getReference($node->getChild(0)),
193			$this->getReference($node->getChild(1))
194			);
195			break;
196
197			case QueryAstNodeType::CALCULATE_IS_GREATER:
198			$this->addMethodCall(
199			$node,
200			'calculateIsGreater',
201			$this->getReference($node->getChild(0)),
202			$this->getReference($node->getChild(1))
203			);
204			break;
205
206			case QueryAstNodeType::CALCULATE_IS_REGEXP:
207			$this->addMethodCall(
208			$node,
209			'calculateIsRegExp',
210			$this->php->val($node->getAttribute('pattern')),
211			$this->getReference($node->getChild(0))
212			);
213			break;
214
215			case QueryAstNodeType::FETCH_CHILDREN:
216			$this->addMethodCall(
217			$node,
218			'fetchChildren',
219			$this->getReference($node->getChild(0)),
220			new Arg(
221			$this->getReference($node->getChild(1)),
222			false,
223			true
224			)
225			);
226			break;
227
228			case QueryAstNodeType::FETCH_CHILDREN_DEEP:
229			$this->addMethodCall(
230			$node,
231			'fetchChildrenDeep',
232			$this->getReference($node->getChild(0)),
233			new Arg(
234			$this->getReference($node->getChild(1)),
235			false,
236			true
237			)
238			);
239			break;
240
241			case QueryAstNodeType::MATCH_ANY_CHILD:
242			$this->addMethodCall(
243			$node,
244			'matchAnyChild',
245			$this->getReference($node->getChild(0))
246			);
247			break;
248
249			case QueryAstNodeType::MATCH_PROPERTY_STRICTLY:
250			$this->addMethodCall(
251			$node,
252			'matchPropertyStrictly',
253			$this->getReference($node->getChild(0)),
254			);
255			break;
256
257			case QueryAstNodeType::MATCH_ELEMENT_STRICTLY:
258			$this->addMethodCall(
259			$node,
260			'matchElementStrictly',
261			$this->getReference($node->getChild(0)),
262			);
263			break;
264
265			case QueryAstNodeType::AGGREGATE:
266			$this->addMethodCall(
267			$node,
268			'aggregate',
269			$this->php->val($node->getAttribute('name')),
270			$this->getReference($node->getChild(0)),
271			);
272			break;
273
274			case QueryAstNodeType::POPULATE_LITERAL:
275			$this->addMethodCall(
276			$node,
277			'populateLiteral',
278			$this->getReference($node->getChild(0)),
279			$this->getReference($node->getChild(1))
280			);
281			break;
282
283			case QueryAstNodeType::POPULATE_LITERAL_ARRAY:
284			$this->addMethodCall(
285			$node,
286			'populateLiteralArray',
287			$this->getReference($node->getChild(0)),
288			new Arg(
289			$this->getReference($node->getChild(1)),
290			false,
291			true
292			)
293			);
294			break;
295
296			case QueryAstNodeType::POPULATE_INDEX_LIST:
297			$this->addMethodCall(
298			$node,
299			'populateIndexList',
300			$this->getReference($node->getChild(0)),
301			...array_map(
302			[$this->php, 'val'],
303			$node->getAttribute('indexList')
304			)
305			);
306			break;
307
308			case QueryAstNodeType::POPULATE_INDEX_SLICE:
309			$attributes = $node->getAttributeList();
310			$this->addMethodCall(
311			$node,
312			'populateIndexSlice',
313			$this->getReference($node->getChild(0)),
314			$this->php->val($attributes['start'] ?? null),
315			$this->php->val($attributes['end'] ?? null),
316			$this->php->val($attributes['step'] ?? null)
317			);
318
319			break;
320
321			case QueryAstNodeType::POPULATE_NAME_LIST:
322			$this->addMethodCall(
323			$node,
324			'populateNameList',
325			$this->getReference($node->getChild(0)),
326			...array_map(
327			[$this->php, 'val'],
328			$node->getAttribute('nameList')
329			)
330			);
331			break;
332
333			case QueryAstNodeType::CREATE_SCALAR:
334			$attributes = $node->getAttributeList();
335			// TODO: allow accessing null attributes
336			$value = $this->php->val($attributes['value'] ?? null);
337			$this->addMethodCall(
338			$node,
339			'createScalar',
340			$value
341			);
342			break;
343
344			case QueryAstNodeType::CREATE_ARRAY:
345			// [ X:APPEND_TO_ARRAY ]
346			$items = [];
347			foreach ($node->getChildList() as $child) {
348			$items[] = $this->getReference($child);
349			}
350			$this->stmts[] = new Assign(
351			$this->createReference($node),
352			$this->php->val($items)
353			);
354			break;
355
356			case QueryAstNodeType::APPEND_TO_ARRAY:
357			// [ 0:<value> ]
358			$this->setReference(
359			$node,
360			$this->getReference($node->getChild(0))
361			);
362			break;
363			}
364			}
365
366			private function getVarName(Node $node): string
367			{
368			return "var{$node->getId()}";
369			}
370
371			private function createReference(Node $node): Expr
372			{
373			$reference = $this->php->var($this->getVarName($node));
374			$this->setReference($node, $reference);
375
376			return $reference;
377			}
378
379			private function setReference(Node $node, Expr $expr): void
380			{
381			if (isset($this->references[$node->getId()])) {
382			throw new Exception\ReferenceAlreadyExistsException($node->getId());
383			}
384
385			$this->references[$node->getId()] = $expr;
386			}
387
388			private function hasReference(Node $node): bool
389			{
390			return isset($this->references[$node->getId()]);
391			}
392
393			private function getReference(Node $node): Expr
394			{
395			if (!isset($this->references[$node->getId()])) {
396			throw new Exception\ReferenceNotFoundException($node->getId());
397			}
398
399			return $this->references[$node->getId()];
400			}
401
402			private function addMethodCall(Node $node, string $method, \PhpParser\Node ...$args): void
403			{
404			$methodCall = $this
405			->php
406			->methodCall($this->runtime, $method, $args);
407			$this->stmts[] = new Assign($this->createReference($node), $methodCall);
408			}
409			}
410

remorhaz / php-json-path

Push — master ( c2f53d...1e149c )

QueryCallbackBuilder::setReference() A

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

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