Flipbox\Transform\Scope\ArrayScope

Complexity

Total Complexity

18

Size/Duplication

Total Lines	173
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	3

Test Coverage

Coverage

0%

Importance

Changes

0

8 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	7	1
A	isRequested()	0	7	1
A	isExcluded()	0	7	1
B	transform()	0	28	5
B	includeValue()	0	17	5
A	filterFields()	0	15	2
A	getFilterFields()	0	6	1
A	scopeString()	0	11	2

<?php

/**
 * @author    Flipbox Factory
 * @copyright Copyright (c) 2017, Flipbox Digital
 * @link      https://github.com/flipbox/transform/releases/latest
 * @license   https://github.com/flipbox/transform/blob/master/LICENSE
 */

namespace Flipbox\Transform\Scope;

use Flipbox\Transform\Transformers\TransformerInterface;
use Flipbox\Transform\Transform\ArrayTransform as ConfigurableTransform;
use Flipbox\Transform\ParamBag;

/**
 * @author Flipbox Factory <hello@flipboxfactory.com>
 * @since 1.0.0
 *
 * @property ConfigurableTransform $transform
 */
class ArrayScope extends AbstractScope
{

    /**
     * Scope constructor.
     * @param ConfigurableTransform $transform
     * @param string|null $scopeIdentifier
     * @param array $parentScopes
     */
    public function __construct(
        ConfigurableTransform $transform,
        string $scopeIdentifier = null,
        array $parentScopes = []
    ) {
        parent::__construct($transform, $scopeIdentifier, $parentScopes);
    }

    /**
     * Is Requested.
     *
     * Check if - in relation to the current scope - this specific segment is allowed.
     * That means, if a.b.c is requested and the current scope is a.b, then c is allowed. If the current
     * scope is a then c is not allowed, even if it is there and potentially transformable.
     *
     * @internal
     *
     * @param string $checkScopeSegment
     *
     * @return bool Returns the new number of elements in the array.
     */
    protected function isRequested($checkScopeSegment): bool
    {
        return in_array(
            $this->scopeString($checkScopeSegment),
            $this->transform->getIncludes()
        );
    }

    /**
     * Is Excluded.
     *
     * Check if - in relation to the current scope - this specific segment should
     * be excluded. That means, if a.b.c is excluded and the current scope is a.b,
     * then c will not be allowed in the transformation whether it appears in
     * the list of default or available, requested includes.
     *
     * @internal
     *
     * @param string $checkScopeSegment
     *
     * @return bool
     */
    protected function isExcluded($checkScopeSegment): bool
    {
        return in_array(
            $this->scopeString($checkScopeSegment),
            $this->transform->getExcludes()
        );
    }

    /**
     * @param TransformerInterface|callable $transformer
     * @param mixed $data
     * @return array
     */
    public function transform(callable $transformer, $data): array
    {
        $includedData = [];

        // Transform data
        $transformedData = parent::transform($transformer, $data);

        // Bail now
        if (null === $transformedData) {
            return $includedData;
        }

        if (is_string($transformedData)) {
            $transformedData = [$transformedData];
        }

        foreach ($transformedData as $key => $val) {
            if (!$this->includeValue($transformer, $key)) {
                continue;
            }
            $includedData[$key] = $this->parseValue($val, $data, $key);
        }

        // Return only the requested fields
        $includedData = $this->filterFields($includedData);

        return $includedData;
    }

    /**
     * @param callable $transformer
     * @param string $key
     * @return bool
     */
    protected function includeValue(callable $transformer, string $key): bool
    {
        // Ignore optional (that have not been explicitly requested)
        if ($transformer instanceof TransformerInterface &&
            in_array($key, $transformer->getIncludes(), true) &&
            !$this->isRequested($key)
        ) {
            return false;
        }

        // Ignore excludes
        if ($this->isExcluded($key)) {
            return false;
        }

        return true;
    }

    /**
     * Filter the provided data with the requested filter fields for
     * the scope resource
     *
     * @internal
     *
     * @param array $data
     *
     * @return array
     */
    protected function filterFields(array $data): array
    {
        $fields = $this->getFilterFields();

        if ($fields === null) {
            return $data;
        }

        return array_intersect_key(
            $data,
            array_flip(
                iterator_to_array($fields)
            )
        );
    }

    /**
     * Return the requested filter fields for the scope resource
     *
     * @internal
     *
     * @return ParamBag|null
     */
    protected function getFilterFields()
    {
        return $this->transform->getField(
            $this->getScopeIdentifier()
        );
    }

    /**
     * @param string $checkScopeSegment
     * @return string
     */
    private function scopeString(string $checkScopeSegment): string
    {
        if ($this->parentScopes) {

The expression $this->parentScopes of type array is implicitly converted to a boolean; are you sure this is intended? If so, consider using ! empty($expr) instead to make it clear that you intend to check for an array without elements.

            $scopeArray = array_slice($this->parentScopes, 1);
            array_push($scopeArray, $this->scopeIdentifier, $checkScopeSegment);
        } else {
            $scopeArray = [$checkScopeSegment];
        }

        return implode('.', (array)$scopeArray);
    }
}