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1
1<?php
2declare(strict_types=1);
3/**
4 * Pop PHP Framework (https://www.popphp.org/)
5 *
6 * @link       https://github.com/popphp/popphp-framework
7 * @author     Nick Sagona, III <nick@popphp.org>
8 * @copyright  Copyright (c) 2009-2026 Nick Sagona, III
9 * @license    https://www.popphp.org/license     New BSD License
10 */
11
12/**
13 * @namespace
14 */
15namespace Pop\Cache\Clock;
16
17/**
18 * Mutable clock class
19 *
20 * A clock whose time can be explicitly set and advanced, for deterministic testing of TTL/expiration behavior
21 * without real sleep() calls.
22 *
23 * @category   Pop
24 * @package    Pop\Cache
25 * @author     Nick Sagona, III <nick@popphp.org>
26 * @copyright  Copyright (c) 2009-2026 Nick Sagona, III
27 * @license    https://www.popphp.org/license     New BSD License
28 * @version    5.0.0
29 */
30class MutableClock implements ClockInterface
31{
32
33    /**
34     * Current time as a Unix timestamp
35     * @var int
36     */
37    protected int $time;
38
39    /**
40     * Constructor
41     *
42     * Instantiate the mutable clock object
43     *
44     * @param  ?int $time
45     */
46    public function __construct(?int $time = null)
47    {
48        $this->time = $time ?? time();
49    }
50
51    /**
52     * Get the current time as a Unix timestamp
53     *
54     * @return int
55     */
56    public function now(): int
57    {
58        return $this->time;
59    }
60
61    /**
62     * Set the current time
63     *
64     * @param  int $time
65     * @return MutableClock
66     */
67    public function setTime(int $time): MutableClock
68    {
69        $this->time = $time;
70        return $this;
71    }
72
73    /**
74     * Advance the current time by a number of seconds
75     *
76     * @param  int $seconds
77     * @return MutableClock
78     */
79    public function advance(int $seconds): MutableClock
80    {
81        $this->time += $seconds;
82        return $this;
83    }
84
85}