Smoren\NestedAccessor\Components\NestedAccessor

Complexity

Total Complexity

44

Size/Duplication

Total Lines	263
Duplicated Lines	0 %

Importance

Changes	2
Bugs	0	Features	0

8 Methods

Rating	Name	Duplication	Size	Complexity
A	setSource()	0	13	3
A	__construct()	0	4	1
A	set()	0	4	1
A	formatPath()	0	11	4
C	_set()	0	39	12
C	_get()	0	73	17
A	append()	0	4	1
A	get()	0	31	5

<?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 <ofigate@gmail.com>
 */
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

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.

     */
    protected string $pathDelimiter;

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

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.

     * @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;
        }

        $path = $this->formatPath($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
    {
        $path = $this->formatPath($path);
        return $this->_set($this->source, $path, $value, false, $strict);
    }

    /**
     * Appender 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 $this
     * @throws NestedAccessorException
     */
    public function append($path, $value, bool $strict = true): self
    {
        $path = $this->formatPath($path);
        return $this->_set($this->source, $path, $value, true, $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 $append when true append or set
     * @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 $append, 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, $key)) {
                    throw NestedAccessorException::createAsCannotSetValue(implode($this->pathDelimiter, $path));
                }
                $temp = &$temp->{$key};
            } else {
                // TODO check PHPStan: "Cannot access offset string on mixed"
                /** @var array<string, mixed> $temp */
                $temp = &$temp[$key];
            }
        }
        // now we can save value to the source
        if($append) {
            if(!is_array($temp) || ArrayHelper::isAssoc($temp)) {
                if($strict) {
                    throw NestedAccessorException::createAsCannotSetValue(implode($this->pathDelimiter, $path));
                } elseif(!is_array($temp)) {
                    $temp = [];
                }
            }

            $temp[] = $value;
        } else {
            $temp = $value;
        }
        unset($temp);

        return $this;
    }

    /**
     * @param string|string[]|null $path
     * @return string[]
     */
    protected function formatPath($path): array
    {
        if(is_array($path)) {
            return $path;
        }

        if($path === null || $path === '') {
            return [];
        }

        return explode($this->pathDelimiter, $path);
    }
}