116 lines
3.4 KiB
Go
116 lines
3.4 KiB
Go
package blog
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import (
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"encoding/xml"
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"fmt"
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"strings"
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"time"
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)
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const baseURL = "https://chaosmith.systems"
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func generateRSS(s *Store) string {
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var b strings.Builder
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b.WriteString(`<?xml version="1.0" encoding="UTF-8"?>` + "\n")
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b.WriteString(`<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">` + "\n")
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b.WriteString(" <channel>\n")
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b.WriteString(" <title>Chaosmith Systems — Field Notes</title>\n")
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b.WriteString(" <link>" + baseURL + "/blog/</link>\n")
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b.WriteString(" <description>Engineering, music, and experiments from controlled chaos.</description>\n")
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b.WriteString(" <language>en</language>\n")
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b.WriteString(` <atom:link href="` + baseURL + `/blog/feed.xml" rel="self" type="application/rss+xml"/>` + "\n")
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for _, p := range s.All() {
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b.WriteString(" <item>\n")
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b.WriteString(" <title>" + xmlEscape(p.Title) + "</title>\n")
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b.WriteString(" <link>" + baseURL + "/blog/posts/" + p.Slug + "</link>\n")
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b.WriteString(" <guid>" + baseURL + "/blog/posts/" + p.Slug + "</guid>\n")
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b.WriteString(" <description>" + xmlEscape(p.Description) + "</description>\n")
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b.WriteString(" <pubDate>" + p.Date.Format(time.RFC1123Z) + "</pubDate>\n")
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b.WriteString(" </item>\n")
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}
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b.WriteString(" </channel>\n</rss>\n")
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return b.String()
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}
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func generateJSONFeed(s *Store) string {
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var b strings.Builder
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b.WriteString(`{"version":"https://jsonfeed.org/version/1.1","title":"Chaosmith Systems — Field Notes","home_page_url":"` + baseURL + `/blog/","feed_url":"` + baseURL + `/blog/feed.json","items":[`)
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first := true
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for _, p := range s.All() {
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if !first {
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b.WriteString(",")
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}
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first = false
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b.WriteString(`{`)
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b.WriteString(`"id":"` + baseURL + "/blog/posts/" + p.Slug + `",`)
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b.WriteString(`"url":"` + baseURL + "/blog/posts/" + p.Slug + `",`)
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b.WriteString(`"title":"` + jsonEscape(p.Title) + `",`)
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b.WriteString(`"summary":"` + jsonEscape(p.Description) + `",`)
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b.WriteString(`"date_published":"` + p.Date.Format(time.RFC3339) + `"`)
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b.WriteString(`}`)
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}
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b.WriteString("]}")
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return b.String()
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}
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func generateSitemap(s *Store) string {
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var b strings.Builder
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b.WriteString(`<?xml version="1.0" encoding="UTF-8"?>` + "\n")
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b.WriteString(`<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` + "\n")
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// Static pages
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b.WriteString(" <url>\n")
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b.WriteString(" <loc>" + baseURL + "/</loc>\n")
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b.WriteString(" <changefreq>monthly</changefreq>\n")
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b.WriteString(" </url>\n")
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b.WriteString(" <url>\n")
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b.WriteString(" <loc>" + baseURL + "/blog/</loc>\n")
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b.WriteString(" <changefreq>weekly</changefreq>\n")
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b.WriteString(" </url>\n")
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for _, p := range s.All() {
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b.WriteString(" <url>\n")
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b.WriteString(" <loc>" + baseURL + "/blog/posts/" + p.Slug + "</loc>\n")
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b.WriteString(" <lastmod>" + p.Date.Format("2006-01-02") + "</lastmod>\n")
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b.WriteString(" </url>\n")
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}
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b.WriteString("</urlset>\n")
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return b.String()
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}
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func xmlEscape(s string) string {
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var b strings.Builder
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xml.EscapeText(&b, []byte(s))
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return b.String()
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}
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func jsonEscape(s string) string {
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var b strings.Builder
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for _, r := range s {
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switch r {
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case '"':
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b.WriteString(`\"`)
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case '\\':
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b.WriteString(`\\`)
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case '\n':
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b.WriteString(`\n`)
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case '\r':
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b.WriteString(`\r`)
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case '\t':
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b.WriteString(`\t`)
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default:
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if r < 0x20 {
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b.WriteString(fmt.Sprintf(`\u%04x`, r))
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} else {
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b.WriteRune(r)
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}
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}
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}
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return b.String()
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}
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