TraderInteractive\Filter\Closures

Complexity

Total Complexity

5

Size/Duplication

Total Lines	31
Duplicated Lines	0 %

Importance

Changes	1
Bugs	0	Features	0

1 Method

Rating	Name	Duplication	Size	Complexity
A	filter()	0	15	5

<?php

namespace TraderInteractive\Filter;

use TraderInteractive\Exceptions\FilterException;

/**
 * A collection of filters for Closures.
 */
class Closures
{
    /**
     * Filters $value to a Closure strictly.
     *
     * $value must be a bool or 'true' or 'false' disregarding case and whitespace.
     *
     * The return value is \Closure, as expected by the \TraderInteractive\Filterer class.
     *
     * @param mixed $value       the value to filter to a boolean
     * @param bool  $allowNull   Set to true if NULL values are allowed. The filtered result of a NULL value is NULL
     *
     * @return bool|null the filtered $value
     *
     * @throws FilterException
     */
    public static function filter($value, bool $allowNull = false)
    {
        if ($allowNull === true && $value === null) {
            return null;
        }

        if ($value instanceof \Closure) {
            return $value;

The expression return $value returns the type Closure which is incompatible with the documented return type boolean|null.

        }

        if (is_callable($value)) {
            return \Closure::fromCallable($value);

The expression return Closure::fromCallable($value) returns the type Closure which is incompatible with the documented return type boolean|null.

        }

        throw new FilterException('Value "' . var_export($value, true) . '" is not Closure or $allowNull is not set');
    }
}