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
|
// RSS 2.0 and Atom feeds for the blog posts, emitted as feed.xml and
// atom.xml by main.typ. Entries are built from the metadata in
// site-info.pages (newest first).
#import "/global/common.typ": baseurl
#let xml-escape(s) = s.replace("&", "&").replace("<", "<").replace(">", ">")
// ISO date ("2026-07-28") to RFC 822 ("Tue, 28 Jul 2026 00:00:00 GMT").
#let rfc822(iso) = {
let (y, m, d) = iso.split("-").map(int)
datetime(year: y, month: m, day: d).display(
"[weekday repr:short], [day] [month repr:short] [year] 00:00:00 GMT"
)
}
// ISO date ("2026-07-28") to RFC 3339 ("2026-07-28T00:00:00Z").
#let rfc3339(iso) = iso + "T00:00:00Z"
#let _entries(site-info, item-fn) = {
let pages = site-info.pages
let ids = pages.keys().filter(k => k.starts-with("post/"))
let entries = ()
for id in ids {
let p = pages.at(id)
let title = if "long-title" in p { p.long-title } else { p.title }
let url = baseurl + "/" + id + ".html"
entries.push(item-fn(title, url, p))
}
entries
}
#let feed-xml(site-info) = {
let items = _entries(site-info, (title, url, p) => {
let lines = (
" <item>",
" <title>" + xml-escape(title) + "</title>",
" <link>" + url + "</link>",
" <guid>" + url + "</guid>",
)
if "date" in p {
lines.push(" <pubDate>" + rfc822(p.date) + "</pubDate>")
}
if "description" in p {
lines.push(" <description>" + xml-escape(p.description) + "</description>")
}
lines.push(" </item>")
lines.join("\n")
})
(
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>",
"<rss version=\"2.0\">",
"<channel>",
" <title>" + xml-escape(site-info.title) + "</title>",
" <link>" + baseurl + "/</link>",
" <description>Posts from " + xml-escape(site-info.title) + " (" + baseurl + ")</description>",
items.join("\n"),
"</channel>",
"</rss>",
"",
).join("\n")
}
// Atom (RFC 4287) feed, emitted as atom.xml by main.typ.
#let atom-xml(site-info) = {
let entries = _entries(site-info, (title, url, p) => {
let lines = (
" <entry>",
" <title>" + xml-escape(title) + "</title>",
" <link href=\"" + url + "\"/>",
" <id>" + url + "</id>",
)
if "date" in p {
lines.push(" <updated>" + rfc3339(p.date) + "</updated>")
}
if "description" in p {
lines.push(" <summary>" + xml-escape(p.description) + "</summary>")
}
lines.push(" </entry>")
lines.join("\n")
})
// newest post first, so its date is the feed's last-update time
let updated = rfc3339(site-info.pages.at(
site-info.pages.keys().filter(k => k.starts-with("post/")).first()
).date)
(
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>",
"<feed xmlns=\"http://www.w3.org/2005/Atom\">",
" <title>" + xml-escape(site-info.title) + "</title>",
" <link href=\"" + baseurl + "/\"/>",
" <link rel=\"self\" href=\"" + baseurl + "/atom.xml\"/>",
" <id>" + baseurl + "/</id>",
" <updated>" + updated + "</updated>",
" <author>",
" <name>Kumar</name>",
" </author>",
entries.join("\n"),
"</feed>",
"",
).join("\n")
}
|
