head-first-design-pattern/src/Command/UndoRemoteControl/RemoteControlWithUndo.php at master · TBlindaruk/head-first-design-pattern · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
<?php

declare(strict_types = 1);

namespace Maksi\HeadFirstDesignPattern\Command\UndoRemoteControl;

/**
 * Class RemoteControlWithUndo
 *
 * @package Maksi\HeadFirstDesignPattern\Command\UndoRemoteControl
 */
class RemoteControlWithUndo
{
    /**
     * @var Command[]
     */
    private $onCommands;
    /**
     * @var Command[]
     */
    private $offCommands;
    /**
     * @var Command
     */
    private $undoCommand;

    /**
     * RemoteControlWithUndo constructor.
     */
    public function __construct()
    {

        $noCommand = new NoCommand();
        for ($i = 0; $i < 7; $i++) {
            $this->onCommands[$i] = $noCommand;
            $this->offCommands[$i] = $noCommand;
        }
        $this->undoCommand = $noCommand;
    }

    public function setCommand(int $slot, Command $onCommand, Command $offCommand): void
    {
        $this->onCommands[$slot] = $onCommand;
        $this->offCommands[$slot] = $offCommand;
    }

    public function onButtonWasPushed(int $slot): void
    {
        $this->onCommands[$slot]->execute();
        $this->undoCommand = $this->onCommands[$slot];
    }

    public function offButtonWasPushed(int $slot): void
    {
        $this->offCommands[$slot]->execute();
        $this->undoCommand = $this->offCommands[$slot];
    }

    public function undoButtonWasPushed(): void
    {
        $this->undoCommand->undo();
        $this->undoCommand = new NoCommand();
    }

    /**
     * @return string
     */
    public function __toString(): string
    {
        $result = '';
        $result .= "\n------ Remote Control -------\n" . PHP_EOL;
        for ($i = 0, $iMax = \count($this->onCommands); $i < $iMax; $i++) {
            $result .= '[slot ' . $i . '] ' . \get_class($this->onCommands[$i]) . '    ' . \get_class($this->offCommands[$i]) . "\n";
        }
        $result .= '[undo] ' . \get_class($this->undoCommand) . "\n";

        return $result;
    }
}