用回 WordPress 自带评论系统

最近 Disqus 被某国的墙搞的十分不稳定,于是又用回了 WordPress 自带的评论系统,但是这个评论系统却不带评论者被回复时的邮件提醒。我有自己的发信服务器(AWS SES)系统,所以理论上可以配合插件实现这个效果。但是我看了很多插件,基本上操作页面都太复杂,而且回复的邮件通常不支持中文,我只需要一个简单的回复系统,不用那么麻烦,于是干脆自己开发一个,最终比较完美的实现了这个功能。

我开发的这个功能特点是:当评论者被回复时,邮件标题是 “Re: [文章标题]”,这样评论者的一个留言被多个人回复时,会被自动在本地邮件客户端上归为一类;而且评论者收到邮件后可以直接回复邮件,会直接给回复的发出者发邮件(不会显示在网站上,我也无法看到,这将是两人的私聊)。

邮件内容简洁,无额外无用的东西,不会被认定为 Spam。

收件例子

所有代码已经放到 GitHub Gist 上。

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
<?php
function tlo_comment_mail_notify($comment_id) {
global $comment_author;
$comment = get_comment($comment_id);
$parent_id = $comment->comment_parent ? $comment->comment_parent : '';
$spam_confirmed = $comment->comment_approved;
$from = $comment->comment_author_email;
$to = get_comment($parent_id)->comment_author_email;
if (($parent_id != '') && ($spam_confirmed != 'spam') && $from != $to && $to != get_bloginfo('admin_email') ) {
$blog_name = get_option('blogname');
$blog_url = site_url();
$post_url = get_permalink( $comment->comment_post_ID );
$comment_author = $comment->comment_author;
$subject = 'Re: '.html_entity_decode(get_the_title($comment->comment_post_ID));
$headers[] = 'Reply-To: '.$comment_author.' <'.$comment->comment_author_email.'>';
$comment_parent = get_comment($parent_id);
$comment_parent_date = tlo_get_comment_date( $comment_parent );
$comment_parent_time = tlo_get_comment_time( $comment_parent );
$message = <<<HTML
<!DOCTYPE html>
<html lang="zh">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<title>$blog_name</title>
</head>
<body>
<style type="text/css">
img {
max-width: 100%; height: auto;
}
</style>
<div class="content">
<div>
<p>$comment->comment_content</p>
</div>
</div>
<div class="footer" style="margin-top: 10px">
<p style="color: #777; font-size: small">
&mdash;
<br>
Reply to this email to communicate with replier directly, or <a href="$post_url#comment-$comment_id">view it on $blog_name</a>.
<br>
You're receiving this email because of your comment got replied.
</p>
</div>
<blockquote type="cite">
<div>On {$comment_parent_date}, {$comment_parent_time},$comment_parent->comment_author &lt;<a href="mailto: $comment_parent->comment_author_email">$comment_parent->comment_author_email</a>&gt; wrote:</div>
<br>
<div class="content">
<div>
<p>$comment_parent->comment_content</p>
</div>
</div>
</blockquote>
</body>
</html>
HTML;
add_filter( 'wp_mail_content_type', 'tlo_mail_content_type' );
add_filter( 'wp_mail_from_name', 'tlo_mail_from_name' );
wp_mail( $to, $subject, $message, $headers );
}
}
add_action('tlo_comment_post_async', 'tlo_comment_mail_notify');

function tlo_comment_mail_notify_async($comment_id) {
wp_schedule_single_event( time(), 'tlo_comment_post_async', [$comment_id] );
}
add_action('comment_post', 'tlo_comment_mail_notify_async');
// add_action('comment_post', 'tlo_comment_mail_notify');

function tlo_mail_content_type() {
return 'text/html';
}
function tlo_mail_from_name() {
global $comment_author;
return $comment_author;
}

function tlo_get_comment_time( $comment ) {
$date = mysql2date(get_option('time_format'), $comment->comment_date, true);

return apply_filters( 'tlo_get_comment_time', $date, $comment );
}
function tlo_get_comment_date( $comment ) {
$date = mysql2date(get_option('date_format'), $comment->comment_date);

return apply_filters( 'tlo_get_comment_date', $date, $comment );
}