JClaveau\Async\FunctionCallTrait

Complexity

Total Complexity

6

Size/Duplication

Total Lines	47
Duplicated Lines	0 %

Importance

Changes	1
Bugs	0	Features	0

4 Methods

Rating	Name	Duplication	Size	Complexity
A	hasPlaceholder()	0	3	1
A	replacePlaceholderWithValue()	0	5	2
A	prepareArgs()	0	3	2
A	addValueAsFirstArg()	0	4	1

<?php

/**
 * FunctionCallTrait
 *
 * @package php-deferred-callchain
 * @author  Daniel S. Deboer
 * @author  Jean Claveau
 */
namespace JClaveau\Async;

/**
 * This trait is an almost pure copy of the the argument handling of the 
 * Pipe class https://github.com/danielsdeboer/pipe.
 */
trait FunctionCallTrait
{
    /**
     * @var string $placeholder The value that will be replaced by the chain subject
     */
    protected $placeholder = '$$';
    /**
     * Prepare the arguments list.
     * @param array $args
     * @param mixed $value
     * @return array
     */
    protected function prepareArgs(array $args, $value)
    {
        return $this->hasPlaceholder($args) ? $this->replacePlaceholderWithValue($args, $value) : $this->addValueAsFirstArg($args, $value);
    }
    /**
     * Check if an array contains an element matching the placeholder.
     * @param array $args
     * @return bool
     */
    protected function hasPlaceholder(array $args)
    {
        return in_array($this->placeholder, $args, true);
    }
    /**
     * Add the value as the first argument in the arguments list.
     * @param array $args
     * @param mixed $value
     * @return array
     */
    protected function addValueAsFirstArg(array $args, $value)
    {
        array_unshift($args, $value);
        return $args;
    }
    /**
     * Replace any occurrence of the placeholder with the value.
     * @param array $args
     * @param mixed $value
     * @return array
     */
    protected function replacePlaceholderWithValue(array $args, $value)
    {
        return array_map(function ($arg) use($value) {
            return $arg === $this->placeholder ? $value : $arg;
        }, $args);
    }
}