fab2s\NodalFlow\Flows\FlowIdTrait

Complexity

Total Complexity

3

Size/Duplication

Total Lines	54
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Importance

Changes

0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	__clone()	0	4	1
A	getId()	0	18	2

<?php

/*
 * This file is part of NodalFlow.
 *     (c) Fabrice de Stefanis / https://github.com/fab2s/NodalFlow
 * This source file is licensed under the MIT license which you will
 * find in the LICENSE file or at https://opensource.org/licenses/MIT
 */

namespace fab2s\NodalFlow\Flows;

/**
 * Trait FlowIdTrait
 */
trait FlowIdTrait
{
    /**
     * This Flow / Node id
     *
     * @var string
     */
    protected $id;

    /**
     * Current nonce, fully valid within each thread
     *
     * @var int
     */
    protected static $nonce = 0;

    /**
     * We need to reset the id when being cloned
     * to guarantee immutable uniqueness
     */
    public function __clone()
    {
        $this->id = null;
    }

    /**
     * Return the immutable unique Flow / Node id
     * Since this method is not used in the actual
     * flow execution loop, but only when an interruption
     * is raised, it's not a performance issue to add an if.
     * And it's more convenient to lazy generate as this
     * trait does not need any init/construct logic.
     *
     * @return string immutable unique id
     */
    public function getId()
    {
        if ($this->id === null) {
            // would require more effort if we where to massively generate / store Flows
            $timeParts       = explode(' ', microtime(false));

            return $this->id = implode('.', array_map(function ($value) {
                return base_convert($value, 10, 36);
            }, [
                $timeParts[1],
                $timeParts[0] * 1000000,
                ++static::$nonce,
                mt_rand(0, 999999),
            ]));
        }

        return $this->id;
    }
}