feat: Added sitemap and RSS feed.

TODOS.md

@@ -5,8 +5,6 @@
   should be Hugo / go.
 - [ ] Deal with the favicon
 - [ ] Icon support.
-- [ ] RSS
-- [ ] sitemap
 - [ ] robots.txt?
 - [ ] Evaluate Tufte CSS — borrow sidenote CSS or replace TailwindCSS entirely
   - Option B: Steal Tufte's sidenote/margin-note CSS (adapt for dark theme), keep TailwindCSS

feed.odin

@@ -0,0 +1,149 @@
+package main
+
+import "core:fmt"
+import "core:strings"
+
+WEEKDAYS: [7]string = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}
+
+generate_rss :: proc(
+	pages: []Page,
+	site_title: string,
+	site_desc: string,
+	base_url: string,
+) -> string {
+	parts: [dynamic]string
+	defer delete(parts)
+
+	append(&parts, fmt.aprintf(
+		`<?xml version="1.0" encoding="utf-8" standalone="yes"?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+<channel>
+<title>%s</title>
+<link>%s/</link>
+<description>%s</description>
+<language>en-us</language>
+<atom:link href="%s/index.xml" rel="self" type="application/rss+xml"/>`,
+		xml_escape(site_title),
+		base_url,
+		xml_escape(site_desc),
+		base_url,
+	))
+
+	for page in pages {
+		if page.type == .Home {
+			continue
+		}
+
+		pub_date := "Mon, 01 Jan 0001 00:00:00 +0000"
+		if page.date != "" {
+			pub_date = format_rfc822(page.date)
+		}
+
+		append(&parts, fmt.aprintf(
+			`<item>
+<title>%s</title>
+<link>%s%s</link>
+<pubDate>%s</pubDate>
+<guid>%s%s</guid>
+<description>%s</description>
+</item>
+`,
+			xml_escape(page.title),
+			base_url,
+			page.permalink,
+			pub_date,
+			base_url,
+			page.permalink,
+			xml_escape(page.body_html),
+		))
+	}
+
+	append(&parts, "</channel>\n</rss>")
+
+	return strings.join(parts[:], "")
+}
+
+generate_sitemap :: proc(pages: []Page, base_url: string) -> string {
+	parts: [dynamic]string
+	defer delete(parts)
+
+	append(
+		&parts,
+		`<?xml version="1.0" encoding="utf-8" standalone="yes"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
+`,
+	)
+
+	for page in pages {
+		lastmod := ""
+		if page.date != "" {
+			lastmod = fmt.aprintf("<lastmod>%s</lastmod>", page.date)
+		}
+		append(&parts, fmt.aprintf(
+			"<url><loc>%s%s</loc>%s</url>\n",
+			base_url,
+			page.permalink,
+			lastmod,
+		))
+	}
+
+	// Posts list page
+	posts_lastmod := ""
+	for page in pages {
+		if page.type == .Post && page.date > posts_lastmod {
+			posts_lastmod = page.date
+		}
+	}
+	posts_lm := ""
+	if posts_lastmod != "" {
+		posts_lm = fmt.aprintf("<lastmod>%s</lastmod>", posts_lastmod)
+	}
+	append(&parts, fmt.aprintf("<url><loc>%s/posts/</loc>%s</url>\n", base_url, posts_lm))
+
+	append(&parts, "</urlset>")
+
+	return strings.join(parts[:], "")
+}
+
+format_rfc822 :: proc(iso: string) -> string {
+	if len(iso) < 19 {
+		return iso
+	}
+
+	year := (int(iso[0]) - 0x30) * 1000 + (int(iso[1]) - 0x30) * 100 +
+		(int(iso[2]) - 0x30) * 10 + (int(iso[3]) - 0x30)
+	month := (int(iso[5]) - 0x30) * 10 + (int(iso[6]) - 0x30)
+	day := (int(iso[8]) - 0x30) * 10 + (int(iso[9]) - 0x30)
+	time := iso[11:19]
+
+	// Timezone: -04:00 → -0400
+	tz := "+0000"
+	if len(iso) >= 25 && (iso[19] == '+' || iso[19] == '-') {
+		tz = fmt.tprintf("%c%s%s", iso[19], iso[20:22], iso[23:25])
+	}
+
+	// Sakamoto's method for day of week (0=Sunday)
+	t := [12]int{0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4}
+	y := year
+	if month < 3 {
+		y -= 1
+	}
+	dow := (y + y / 4 - y / 100 + y / 400 + t[month - 1] + day) % 7
+
+	return fmt.aprintf(
+		"%s, %d %s %d %s %s",
+		WEEKDAYS[dow],
+		day,
+		MONTHS[month - 1],
+		year,
+		time,
+		tz,
+	)
+}
+
+xml_escape :: proc(s: string) -> string {
+	r, _ := strings.replace_all(s, "&", "&amp;")
+	r, _ = strings.replace_all(r, "<", "&lt;")
+	r, _ = strings.replace_all(r, ">", "&gt;")
+	return r
+}

main.odin

@@ -20,7 +20,7 @@ main :: proc() {
 
 	pages := walk_content(opt.content_dir, opt.drafts)
 
-	render_site(pages, opt.content_dir, opt.output_dir)
+	render_site(pages, opt.content_dir, opt.output_dir, opt.base_url)
 }
 
 load_default_options :: proc(opt: ^Options) {
@@ -31,6 +31,10 @@ load_default_options :: proc(opt: ^Options) {
 	if opt.output_dir == "" {
 		opt.output_dir = "./public"
 	}
+
+	if opt.base_url == "" {
+		opt.base_url = "http://localhost:8080"
+	}
 }
 
 print_summary :: proc(pages: []Page) {

render.odin

@@ -9,7 +9,7 @@ MONTHS: [12]string = {
 	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
 }
 
-render_site :: proc(pages: []Page, content_path: string, output_dir: string) {
+render_site :: proc(pages: []Page, content_path: string, output_dir: string, base_url: string) {
 	sort_pages_by_date(pages)
 
 	// Find home page and extract site title
@@ -48,6 +48,16 @@ render_site :: proc(pages: []Page, content_path: string, output_dir: string) {
 	posts_html := render_posts_html(pages, site_title)
 	write_page(output_dir, "/posts/", posts_html)
 
+	// Generate RSS feed
+	if has_home {
+		rss := generate_rss(pages, site_title, home.description, base_url)
+		write_file(fmt.tprintf("%s/index.xml", output_dir), rss)
+	}
+
+	// Generate sitemap
+	sitemap := generate_sitemap(pages, base_url)
+	write_file(fmt.tprintf("%s/sitemap.xml", output_dir), sitemap)
+
 	total := len(pages) + 1
 	if !has_home {
 		total += 1