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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
| #!/usr/bin/env perl
# 言語: perl
# バージョン: 5.36以上
# 依存: Moo（cpanmでインストール）
use v5.36;
package GameEvent {
use Moo;
use v5.36;
has 'type' => (
is => 'ro',
required => 1,
);
has 'message' => (
is => 'ro',
required => 1,
);
has 'timestamp' => (
is => 'ro',
default => sub { time() },
);
has 'data' => (
is => 'ro',
default => sub { {} },
);
}
package GameEventObserver {
use Moo::Role;
use v5.36;
requires 'update';
}
package LogObserver {
use Moo;
use v5.36;
with 'GameEventObserver';
has 'prefix' => (
is => 'ro',
default => '[LOG]',
);
sub update ($self, $event) {
say $self->prefix . " " . $event->message;
}
}
package SoundObserver {
use Moo;
use v5.36;
with 'GameEventObserver';
has 'sound_map' => (
is => 'ro',
default => sub {{
enemy_defeated => 'victory.wav',
item_acquired => 'pickup.wav',
level_up => 'levelup.wav',
}},
);
sub update ($self, $event) {
my $type = $event->type;
my $sound = $self->sound_map->{$type};
if ($sound) {
say "[SOUND] $sound を再生";
}
}
}
package GameEventEmitter {
use Moo;
use v5.36;
has 'observers' => (
is => 'ro',
default => sub { [] },
);
sub attach ($self, $observer) {
push @{$self->observers}, $observer;
}
sub detach ($self, $observer) {
@{$self->observers} = grep { $_ != $observer } @{$self->observers};
}
sub notify ($self, $event) {
for my $observer (@{$self->observers}) {
$observer->update($event);
}
}
# 現在登録されているObserverの数を返す
sub observer_count ($self) {
return scalar @{$self->observers};
}
}
package main {
use v5.36;
my $emitter = GameEventEmitter->new();
my $log_observer = LogObserver->new();
my $sound_observer = SoundObserver->new();
# 最初はログとサウンド両方を登録
$emitter->attach($log_observer);
$emitter->attach($sound_observer);
say "=== サウンドON状態（Observers: " . $emitter->observer_count . "） ===";
say "";
my $event1 = GameEvent->new(
type => 'enemy_defeated',
message => 'スライムを倒した！',
);
$emitter->notify($event1);
say "";
say "--- サウンドをOFFにする ---";
say "";
# サウンドObserverを削除
$emitter->detach($sound_observer);
say "=== サウンドOFF状態（Observers: " . $emitter->observer_count . "） ===";
say "";
my $event2 = GameEvent->new(
type => 'enemy_defeated',
message => 'ゴブリンを倒した！',
);
$emitter->notify($event2);
say "";
say "--- サウンドを再びONにする ---";
say "";
# サウンドObserverを再登録
$emitter->attach($sound_observer);
say "=== サウンドON状態（Observers: " . $emitter->observer_count . "） ===";
say "";
my $event3 = GameEvent->new(
type => 'enemy_defeated',
message => 'オークを倒した！',
);
$emitter->notify($event3);
}
|
