blob: 6c95dc3baecc78e8448e2ccc4c75c950e1a44073 (
plain)
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
163
164
|
#! /bin/bash
# Save incoming mail as comment
# Usage:
# Step1. Add script into forward(5) for MDA
# echo '|<PATH_TO_THIS_SCRIPT> --output_dir=<PATH_OF_HTML_FILES>' >>~/.forward
#
# Step2. Insert related html file into target page, the following example use <object> element
# Please replace <PATH> for your target page:
# <div style="border-radius: 6px; background: lightyellow">
# <a style="display: inline-block; margin: 0.5em 0.5em 0 0; float: right" href="mailto:comment@topo.tw?subject=Comment on page: ${path}">[Comment on this page]</a>
# <object type="text/html" data="/<PATH>.comment.html" onload="observeResize(this)" style="width: 100%;"></object>
# <script>
# function observeResize(commentBlock) {
# new ResizeObserver((entries) => {
# commentBlock.style.height = entries[-1].clientHeight + 'px';
# }).observe(commentBlock.contentDocument.documentElement);
# }
# </script>
# </div>
# 1. Check mail is for comment {{{
# Restore mail into variables
MAIL="$(tr -d '\r')"
# join multi-line field value into one line
header="$(<<<"$MAIL" sed '/^$/ q; :a; N; s/\n\s\+//; ta')"
body="$(<<<"$MAIL" sed -n '/^$/,$ p' | sed '1d')"
# determine mail is for comment by pattern
pattern='^Subject: .*[cC]omment on page: (https?://)?([^/]+/)?([^ ]+)$'
<<<"$header" grep -E "$pattern" >/dev/null || exit 0
# }}}
# 2. Get necessary variables from arguments {{{
while [[ "$1" =~ ^-- && ! "$1" == "--" ]]; do
case $1 in
--output_dir ) shift; output_dir=$1 ;;
--markdown_bin ) shift; markdown_bin=$1 ;;
*) shift ;;
esac
shift
done
output_dir=${output_dir:?}
markdown_bin=${markdown_bin:-markdown}
[ -x $(which $markdown_bin) ] || markdown_bin=cat
# }}}
# 3. Read header fields {{{
# enable execute last command in pipe under current shell
shopt -s lastpipe; set +m;
# save each field of header into variables
echo "$header" | \
while read field value; do
echo "$field" "$value" >>/tmp/header
declare field=$(<<<$field tr [:lower:] [:upper:] | tr '-' '_' | tr -d ':')
declare $field="${value}"
done
DATE=${DATE:+$(date --rfc-3339 seconds --date "$DATE")}
# }}}
# 4. Get path of output file {{{
path=$(<<<"$header" sed -En "\\|${pattern}| {s//\\3/p; q}")
# sender want comment on some page, but find no path for this
if [ $path = "" ]; then
echo 'Cannot get target of comment from mail' >&2
exit 1
fi
# get output path
[[ "$path" =~ '/$' ]] && path+=index
path=${path#/}
path=${path/.html}
output=$output_dir/${path}.comment.html
# }}}
# 5. Get comment from mail body {{{
# check mail includes multiple part
boundary="$(<<<"$CONTENT_TYPE" sed -En 's/^.*boundary="?([^"]+)"?.*$/\1/p')"
if [ -n "${boundary}" ]; then
# print content of first mail part
boundaryPat="\\|^--${boundary}\$|"
body="$(<<<"$body" sed -n "${boundaryPat},${boundaryPat} p" | sed -n "1,4d; ${boundaryPat} q; p")"
fi
# }}}
# 6. Write comment to output file {{{
# add basic html layout for output file if necessary {{{
if [ ! -f $output ] || ! xmllint --html --nofixup-base-uris $output &>/dev/null; then
<<-LAYOUT cat >$output
<style>
ul {
padding-inline: 1rem;
li {
margin-block: 1rem;
}
}
.comment-body {
margin-top: 0.5rem;
padding: 0.5rem;
overflow-x: scroll;
border-radius: 4px;
background: lightblue;
p {
margin: 0.5rem;
}
}
.replies {
display: none;
cursor: pointer;
&:has(li) {
display: block;
}
ul {
padding-inline: 1rem 0;
}
}
</style>
<ul>
</ul>
LAYOUT
fi
# }}}
# get line of insert position by header field "In-Reply-To" {{{
if [ -n "${IN_REPLY_TO}" ]; then
line=$(grep -n "^<!-- ${IN_REPLY_TO} -->$" $output | cut -d':' -f1)
fi
# }}}
# insert comment into output file {{{
# FIXME prevent pattern <!-- ${MESSAGE_ID} --> shown in <pre> block
<<-COMMENT sed -i "${line:-/<ul>/}r /dev/stdin" $output
<li>
<time datetime="${DATE}">${DATE}</time>
<a href="mailto:${RECIPIENT}?subject=Comment on page: ${path}&in-reply-to=${MESSAGE_ID}">[reply]</a>
<div class='comment-body'>
$(<<<"${body}" ${markdown_bin})
</div>
<details class="replies" open="true">
<summary>replies</summary>
<ul>
<!-- ${MESSAGE_ID} -->
</ul>
</details>
</li>
COMMENT
# }}}
# }}}
# vim:fdm=marker
|
