NestedAccessor::__construct() - Code Metrics - Inspection of "nethod get refactored" - Smoren/nested-accessor-php - Measure and Improve Code Quality continuously with Scrutinizer

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by Smoren

created 2022-09-02 13:37 UTC

NestedAccessor::__construct() A

↳ Parent: NestedAccessor

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
eloc	2
c	1
b	0
f	0
nc	1
nop	2
dl	0
loc	4
rs	10

<?php

namespace Smoren\NestedAccessor\Components;

use Smoren\NestedAccessor\Helpers\ArrayHelper;
use Smoren\NestedAccessor\Interfaces\NestedAccessorInterface;
use Smoren\NestedAccessor\Exceptions\NestedAccessorException;

/**
 * Accessor class for getting and setting to source array or object with nested keys
 * @author Smoren <[email protected]>
 */
class NestedAccessor implements NestedAccessorInterface
{
    /**
     * @var array<int|string, mixed>|object data source for accessing
     */
    protected $source;
    /**
     * @var non-empty-string path's separator of nesting

     */
    protected string $pathDelimiter;

    /**
     * ArrayNestedAccessor constructor.
     * @param array<scalar, mixed>|object $source
     * @param non-empty-string $pathDelimiter

     * @throws NestedAccessorException
     */
    public function __construct(&$source, string $pathDelimiter = '.')
    {
        $this->setSource($source);
        $this->pathDelimiter = $pathDelimiter;
    }

    /**
     * Setter for source
     * @param array<scalar, mixed>|object $source source setter
     * @return void
     * @throws NestedAccessorException
     */
    public function setSource(&$source): void
    {
        /** @var array<scalar, mixed>|object|mixed|null $source */
        if($source === null) {
            $source = [];
        }

        if(is_scalar($source)) {
            throw NestedAccessorException::createAsSourceIsScalar($source);
        }

        /** @var array<int|string, mixed>|object $source */
        $this->source = &$source;
    }

    /**
     * Getter of source part specified by nested path
     * @param string|array<string>|null $path nested path
     * @param bool $strict if true: throw exception when path is not found in source
     * @return mixed value from source got by nested path
     * @throws NestedAccessorException if strict mode on and path is not found in source
     */
    public function get($path = null, bool $strict = true)
    {
        // when path is not specified
        if($path === null || $path === '') {
            // let's return the full source
            return $this->source;
        }

        if(!is_array($path)) {
            $path = explode($this->pathDelimiter, $path);
        }

        // let result be null and there are no errors by default
        $result = null;
        $errorsCount = 0;

        // getting result with internal recursive method
        $this->_get(
            $this->source,
            array_reverse($path), // path stack
            $result,
            $errorsCount
        );

        // when strict mode is on and we got errors
        if($strict && $errorsCount) {
            throw NestedAccessorException::createAsCannotGetValue(
                implode($this->pathDelimiter, $path),
                $errorsCount
            );
        }

        return $result;
    }

    /**
     * Setter of source part specified by nested path
     * @param string|array<string> $path nested path
     * @param mixed $value value to save by path
     * @param bool $strict when true throw exception if path not exist in source object
     * @return $this
     * @throws NestedAccessorException
     */
    public function set($path, $value, bool $strict = true): self
    {
        if(!is_array($path)) {
            $path = explode($this->pathDelimiter, $path);
        }
        return $this->_set($this->source, $path, $value, $strict);
    }

    /**
     * Internal recursive method to get value from source by path stack
     * @param mixed $source source to get value from
     * @param array<string> $path nested path stack
     * @param array<scalar, mixed>|mixed $result place for result
     * @param int $errorsCount errors counter
     * @return void
     */
    protected function _get($source, array $path, &$result, int &$errorsCount): void
    {
        // let's iterate every path part from stack
        while(count($path)) {
            if(is_array($source) && !ArrayHelper::isAssoc($source)) {
                // the result will be multiple
                if(!is_array($result)) {
                    $result = [];
                }
                // and we need to use recursive call for each item of this array
                foreach($source as $item) {
                    $this->_get($item, $path, $result, $errorsCount);
                }
                // we don't need to do something in this recursive branch
                return;
            }

            $key = array_pop($path);

            if(is_array($source)) {
                if(!array_key_exists($key, $source)) {
                    // path part key is missing in source array
                    $errorsCount++;
                    // we cannot go deeper
                    return;
                }
                // go to the next nested level
                $source = $source[$key];
            } elseif(is_object($source)) {
                $getterName = 'get'.ucfirst($key);
                if(method_exists($source, $getterName)) {
                    // go to the next nested level
                    $source = $source->{$getterName}();
                } elseif(property_exists($source, $key)) {
                    // go to the next nested level
                    $source = $source->{$key};
                } else {
                    // path part key is missing in source object
                    $errorsCount++;
                    // we cannot go deeper
                    return;
                }
            } else {
                // source is scalar, so we can't go to the next depth level
                $errorsCount++;
                // we cannot go deeper
                return;
            }

            // when it's not the last iteration of the stack
            // and the source is non-associative array (list)
            if(count($path) && is_array($source) && !ArrayHelper::isAssoc($source)) {
                // the result will be multiple
                if(!is_array($result)) {
                    $result = [];
                }
                // and we need to use recursive call for each item of this array
                foreach($source as $item) {
                    $this->_get($item, $path, $result, $errorsCount);
                }
                // we don't need to do something in this recursive branch
                return;
            }
        }

        // now path stack is empty — we reached target value of given path in source argument
        // so if result is multiple
        if(is_array($result)) {
            // we append source to result
            $result[] = $source;
        } else {
            // result is single
            $result = $source;
        }
        // that's all folks!
    }

    /**
     * Internal recursive method to save value to source by path stack
     * @param array<scalar, mixed>|object $source source to save value to
     * @param array<string> $path nested path
     * @param mixed $value value to save to source
     * @param bool $strict when true throw exception if path not exist in source object
     * @return $this
     * @throws NestedAccessorException
     */
    protected function _set(&$source, array $path, $value, bool $strict): self
    {
        $temp = &$source;
        // let's iterate every path part to go deeper into nesting
        foreach($path as $key) {
            if(isset($temp) && is_scalar($temp)) {
                // value in the middle of the path must me an array
                $temp = [];
            }

            // go to the next nested level
            if(is_object($temp)) {
                if($strict && !property_exists($temp, $key)) {
                    throw NestedAccessorException::createAsCannotSetValue($key);
                }
                $temp = &$temp->{$key};
            } else {
                // TODO check PHPStan: "Cannot access offset string on mixed"
                /** @var array<string, mixed> $temp */
                $temp = &$temp[$key];
            }
        }
        // now we can save value to the source
        $temp = $value;
        unset($temp);

        return $this;
    }
}


1			<?php
2
3			namespace Smoren\NestedAccessor\Components;
4
5			use Smoren\NestedAccessor\Helpers\ArrayHelper;
6			use Smoren\NestedAccessor\Interfaces\NestedAccessorInterface;
7			use Smoren\NestedAccessor\Exceptions\NestedAccessorException;
8
9			/**
10			* Accessor class for getting and setting to source array or object with nested keys
11			* @author Smoren <[email protected]>
12			*/
13			class NestedAccessor implements NestedAccessorInterface
14			{
15			/**
16			* @var array<int\|string, mixed>\|object data source for accessing
17			*/
18			protected $source;
19			/**
20			* @var non-empty-string path's separator of nesting
			0 ignored issues – show Documentation Bug introduced 2022-08-28 09:32 UTC by Report Bug Copy Issue Report The doc comment `non-empty-string` at position `0` could not be parsed: Unknown type name 'non-empty-string' at position 0 in non-empty-string. Loading history...
21			*/
22			protected string $pathDelimiter;
23
24			/**
25			* ArrayNestedAccessor constructor.
26			* @param array<scalar, mixed>\|object $source
27			* @param non-empty-string $pathDelimiter
			0 ignored issues – show Documentation Bug introduced 2022-08-28 09:32 UTC by Report Bug Copy Issue Report The doc comment `non-empty-string` at position `0` could not be parsed: Unknown type name 'non-empty-string' at position 0 in non-empty-string. Loading history...
28			* @throws NestedAccessorException
29			*/
30			public function __construct(&$source, string $pathDelimiter = '.')
31			{
32			$this->setSource($source);
33			$this->pathDelimiter = $pathDelimiter;
34			}
35
36			/**
37			* Setter for source
38			* @param array<scalar, mixed>\|object $source source setter
39			* @return void
40			* @throws NestedAccessorException
41			*/
42			public function setSource(&$source): void
43			{
44			/** @var array<scalar, mixed>\|object\|mixed\|null $source */
45			if($source === null) {
46			$source = [];
47			}
48
49			if(is_scalar($source)) {
50			throw NestedAccessorException::createAsSourceIsScalar($source);
51			}
52
53			/** @var array<int\|string, mixed>\|object $source */
54			$this->source = &$source;
55			}
56
57			/**
58			* Getter of source part specified by nested path
59			* @param string\|array<string>\|null $path nested path
60			* @param bool $strict if true: throw exception when path is not found in source
61			* @return mixed value from source got by nested path
62			* @throws NestedAccessorException if strict mode on and path is not found in source
63			*/
64			public function get($path = null, bool $strict = true)
65			{
66			// when path is not specified
67			if($path === null \|\| $path === '') {
68			// let's return the full source
69			return $this->source;
70			}
71
72			if(!is_array($path)) {
73			$path = explode($this->pathDelimiter, $path);
74			}
75
76			// let result be null and there are no errors by default
77			$result = null;
78			$errorsCount = 0;
79
80			// getting result with internal recursive method
81			$this->_get(
82			$this->source,
83			array_reverse($path), // path stack
84			$result,
85			$errorsCount
86			);
87
88			// when strict mode is on and we got errors
89			if($strict && $errorsCount) {
90			throw NestedAccessorException::createAsCannotGetValue(
91			implode($this->pathDelimiter, $path),
92			$errorsCount
93			);
94			}
95
96			return $result;
97			}
98
99			/**
100			* Setter of source part specified by nested path
101			* @param string\|array<string> $path nested path
102			* @param mixed $value value to save by path
103			* @param bool $strict when true throw exception if path not exist in source object
104			* @return $this
105			* @throws NestedAccessorException
106			*/
107			public function set($path, $value, bool $strict = true): self
108			{
109			if(!is_array($path)) {
110			$path = explode($this->pathDelimiter, $path);
111			}
112			return $this->_set($this->source, $path, $value, $strict);
113			}
114
115			/**
116			* Internal recursive method to get value from source by path stack
117			* @param mixed $source source to get value from
118			* @param array<string> $path nested path stack
119			* @param array<scalar, mixed>\|mixed $result place for result
120			* @param int $errorsCount errors counter
121			* @return void
122			*/
123			protected function _get($source, array $path, &$result, int &$errorsCount): void
124			{
125			// let's iterate every path part from stack
126			while(count($path)) {
127			if(is_array($source) && !ArrayHelper::isAssoc($source)) {
128			// the result will be multiple
129			if(!is_array($result)) {
130			$result = [];
131			}
132			// and we need to use recursive call for each item of this array
133			foreach($source as $item) {
134			$this->_get($item, $path, $result, $errorsCount);
135			}
136			// we don't need to do something in this recursive branch
137			return;
138			}
139
140			$key = array_pop($path);
141
142			if(is_array($source)) {
143			if(!array_key_exists($key, $source)) {
144			// path part key is missing in source array
145			$errorsCount++;
146			// we cannot go deeper
147			return;
148			}
149			// go to the next nested level
150			$source = $source[$key];
151			} elseif(is_object($source)) {
152			$getterName = 'get'.ucfirst($key);
153			if(method_exists($source, $getterName)) {
154			// go to the next nested level
155			$source = $source->{$getterName}();
156			} elseif(property_exists($source, $key)) {
157			// go to the next nested level
158			$source = $source->{$key};
159			} else {
160			// path part key is missing in source object
161			$errorsCount++;
162			// we cannot go deeper
163			return;
164			}
165			} else {
166			// source is scalar, so we can't go to the next depth level
167			$errorsCount++;
168			// we cannot go deeper
169			return;
170			}
171
172			// when it's not the last iteration of the stack
173			// and the source is non-associative array (list)
174			if(count($path) && is_array($source) && !ArrayHelper::isAssoc($source)) {
175			// the result will be multiple
176			if(!is_array($result)) {
177			$result = [];
178			}
179			// and we need to use recursive call for each item of this array
180			foreach($source as $item) {
181			$this->_get($item, $path, $result, $errorsCount);
182			}
183			// we don't need to do something in this recursive branch
184			return;
185			}
186			}
187
188			// now path stack is empty — we reached target value of given path in source argument
189			// so if result is multiple
190			if(is_array($result)) {
191			// we append source to result
192			$result[] = $source;
193			} else {
194			// result is single
195			$result = $source;
196			}
197			// that's all folks!
198			}
199
200			/**
201			* Internal recursive method to save value to source by path stack
202			* @param array<scalar, mixed>\|object $source source to save value to
203			* @param array<string> $path nested path
204			* @param mixed $value value to save to source
205			* @param bool $strict when true throw exception if path not exist in source object
206			* @return $this
207			* @throws NestedAccessorException
208			*/
209			protected function _set(&$source, array $path, $value, bool $strict): self
210			{
211			$temp = &$source;
212			// let's iterate every path part to go deeper into nesting
213			foreach($path as $key) {
214			if(isset($temp) && is_scalar($temp)) {
215			// value in the middle of the path must me an array
216			$temp = [];
217			}
218
219			// go to the next nested level
220			if(is_object($temp)) {
221			if($strict && !property_exists($temp, $key)) {
222			throw NestedAccessorException::createAsCannotSetValue($key);
223			}
224			$temp = &$temp->{$key};
225			} else {
226			// TODO check PHPStan: "Cannot access offset string on mixed"
227			/** @var array<string, mixed> $temp */
228			$temp = &$temp[$key];
229			}
230			}
231			// now we can save value to the source
232			$temp = $value;
233			unset($temp);
234
235			return $this;
236			}
237			}
238

Smoren / nested-accessor-php

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NestedAccessor::__construct() A

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