GpsLab\Component\Command\Queue\PullPush\MemoryUniqueCommandQueue

Complexity

Total Complexity

3

Size/Duplication

Total Lines	38
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Test Coverage

Coverage

100%

Importance

Changes

0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	push()	0	13	2
A	pull()	0	4	1

<?php

/**
 * GpsLab component.
 *
 * @author    Peter Gribanov <info@peter-gribanov.ru>
 * @copyright Copyright (c) 2011, Peter Gribanov
 * @license   http://opensource.org/licenses/MIT
 */

namespace GpsLab\Component\Command\Queue\PullPush;

use GpsLab\Component\Command\Command;

class MemoryUniqueCommandQueue implements CommandQueue
{
    /**
     * @var Command[]
     */
    private $commands = [];

    /**
     * Push command to queue.
     *
     * @param Command $command
     *
     * @return bool
     */
    public function push(Command $command)
    {
        $index = array_search($command, $this->commands);

        // remove exists command and push it again
        if ($index !== false) {
            unset($this->commands[$index]);
        }

        $this->commands[] = $command;

        return true;
    }

    /**
     * Pop command from queue. Return NULL if queue is empty.
     *
     * @return Command|null
     */
    public function pull()
    {
        return array_shift($this->commands);
    }
}