Pierre De Lancre
bd5eb15ade
- Per-post OG tags (title, description, image, date) in template head - Twitter Card support (summary_large_image) - Auto-generate 1200x630 card images from embedded base PNG - Title, description, domain, date drawn on image via fogleman/gg - Fonts embedded via go:embed (OpenSans Bold + Regular) - Optional og-image: and og-description: front matter overrides - Layout constants in ogimage.go for easy repositioning - Generated images cached in content/og/ (gitignored) 👾 Generated with [Letta Code](https://letta.com) Co-Authored-By: Letta Code <noreply@letta.com>
253 lines
8.9 KiB
Go
253 lines
8.9 KiB
Go
package blog
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import (
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"html/template"
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"log"
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"net/http"
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"path/filepath"
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"strings"
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)
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const pageTpl = `<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>{{.Title}}</title>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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{{if .Post.HTML}}
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<meta property="og:title" content="{{.Post.Title}}">
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<meta property="og:description" content="{{.Post.Description}}">
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<meta property="og:type" content="article">
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<meta property="og:url" content="https://chaosmith.systems/blog/posts/{{.Post.Slug}}">
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<meta property="og:image" content="https://chaosmith.systems{{.Post.OGImage}}">
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<meta property="og:site_name" content="Chaosmith Systems">
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<meta property="article:published_time" content="{{.Post.Date.Format "2006-01-02T15:04:05Z07:00"}}">
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<meta name="twitter:card" content="summary_large_image">
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<meta name="twitter:title" content="{{.Post.Title}}">
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<meta name="twitter:description" content="{{.Post.Description}}">
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<meta name="twitter:image" content="https://chaosmith.systems{{.Post.OGImage}}">
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{{else}}
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<meta property="og:title" content="{{.Title}}">
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<meta property="og:type" content="website">
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<meta property="og:url" content="https://chaosmith.systems/blog/">
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<meta property="og:site_name" content="Chaosmith Systems">
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<meta name="twitter:card" content="summary">
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{{end}}
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<link rel="preconnect" href="https://fonts.googleapis.com">
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
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<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600&family=Inter:wght@300;500;700&display=swap" rel="stylesheet">
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<link rel="stylesheet" href="/src/thirdparty/highlight/default.min.css">
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<script src="/src/thirdparty/highlight/highlight.min.js"></script>
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<script src="/src/lang/ergon.js"></script>
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<script src="/src/lang/archasm.js"></script>
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<style>
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:root {
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--bg: #05030a;
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--accent: #b574ff;
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--accent-soft: rgba(181, 116, 255, 0.12);
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--text: #f3f0ff;
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--text-dim: #a9a3c4;
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--border: rgba(255, 255, 255, 0.06);
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}
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* { box-sizing: border-box; }
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body {
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margin: 0; min-height: 100vh;
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background: radial-gradient(circle at top, #1a1035 0, #05030a 55%);
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color: var(--text);
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font-family: "Inter", system-ui, sans-serif;
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display: flex; justify-content: center;
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}
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.wrap { position: relative; z-index: 1; width: 100%; max-width: 1040px; padding: 32px 20px 40px; }
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header {
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display: flex; justify-content: space-between; align-items: center;
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gap: 24px; padding: 18px 22px; border-radius: 18px;
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border: 1px solid var(--border);
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background: linear-gradient(135deg, rgba(255,255,255,0.02), rgba(0,0,0,0.35));
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backdrop-filter: blur(18px);
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}
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.logo-mark {
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width: 44px; height: 44px; border-radius: 14px;
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border: 1px solid rgba(181,116,255,0.7);
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background: radial-gradient(circle at 20% 0, rgba(255,255,255,0.25), transparent 55%),
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radial-gradient(circle at 80% 100%, rgba(181,116,255,0.9), transparent 60%);
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display: flex; align-items: center; justify-content: center;
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font-family: "JetBrains Mono", monospace; font-weight: 600; font-size: 20px;
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}
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.logo-mark a { color: inherit; text-decoration: none; }
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nav { display: flex; gap: 16px; align-items: center; }
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nav a { color: var(--text-dim); text-decoration: none; font-size: 13px; text-transform: uppercase; letter-spacing: 0.1em; }
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nav a:hover { color: var(--accent); }
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main { margin-top: 24px; }
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.post-list { list-style: none; padding: 0; margin: 0; }
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.post-list li { padding: 12px 0; border-top: 1px solid var(--border); }
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.post-list li:first-child { border-top: 0; }
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.post-list a { color: var(--text); text-decoration: none; font-size: 16px; }
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.post-list a:hover { color: var(--accent); }
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.article h1 { font-size: 28px; margin: 0 0 4px; }
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.post-date { display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 24px; }
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.post-date-inline { font-size: 12px; color: var(--text-dim); }
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.article p { line-height: 1.7; color: var(--text-dim); }
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.article pre {
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background: rgba(0,0,0,0.5); border: 1px solid var(--border);
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border-radius: 12px; padding: 16px; overflow-x: auto;
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}
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.article code { font-family: "JetBrains Mono", monospace; font-size: 13px; }
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.article a { color: var(--accent); }
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.article img { max-width: 100%; border-radius: 12px; }
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.article blockquote {
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border-left: 3px solid var(--accent); margin: 0; padding: 4px 16px;
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color: var(--text-dim);
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}
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.article h1 { color: var(--text); }
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.article h2, .article h3 { color: var(--accent); }
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.article ul, .article ol { color: var(--text-dim); line-height: 1.7; }
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.article details {
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border: 1px solid var(--border); border-radius: 12px;
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background: rgba(0,0,0,0.4); margin: 20px 0;
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overflow: hidden;
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}
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.article details summary {
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cursor: pointer; padding: 14px 18px; font-size: 14px;
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color: var(--accent); user-select: none; line-height: 1.5;
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background: linear-gradient(135deg, rgba(181,116,255,0.06), rgba(0,0,0,0.5));
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list-style: none;
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}
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.article details summary::-webkit-details-marker { display: none; }
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.article details summary::before { content: '▸ '; font-size: 12px; }
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.article details[open] summary::before { content: '▾ '; }
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.article details summary:hover { color: var(--text); }
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.article details[open] summary { border-bottom: 1px solid var(--border); }
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.article details[open] {
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color: var(--text-dim); line-height: 1.7; font-size: 14px;
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}
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.article details[open] > *:not(summary) {
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display: block; padding: 14px 18px;
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}
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footer { margin-top: 30px; font-size: 11px; color: var(--text-dim); display: flex; justify-content: space-between; padding: 4px 2px; }
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</style>
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</head>
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<body>
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<div class="wrap">
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<header>
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<div style="display:flex; gap:14px; align-items:center;">
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<div class="logo-mark"><a href="/blog/">CS</a></div>
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<nav>
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<a href="/">Home</a>
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<a href="/blog/">Blog</a>
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</nav>
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</div>
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</header>
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<main>
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{{if .Post.HTML}}
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<article class="article">
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<h1>{{.Post.Title}}</h1>
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<time class="post-date">{{.Post.Date.Format "January 2, 2006"}}</time>
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{{.Post.HTML | safehtml}}
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</article>
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{{else}}
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<h1>Field Notes</h1>
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{{if .Posts}}
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<ul class="post-list">
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{{range .Posts}}
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<li>
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<a href="/blog/posts/{{.Slug}}">{{.Title}}</a>
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<span class="post-date-inline">{{.Date.Format "Jan 2, 2006"}}</span>
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</li>
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{{end}}
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</ul>
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{{else}}
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<p style="color: var(--text-dim);">No posts yet.</p>
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{{end}}
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{{end}}
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</main>
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<footer>
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<span>Running on self-hosted infrastructure.</span>
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<span>Chaosmith Systems</span>
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</footer>
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</div>
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<script>hljs.highlightAll();</script>
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</body>
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</html>`
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type pageData struct {
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Title string
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Posts []Post
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Post Post
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ActiveSlug string
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}
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var tmpl *template.Template
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func safehtml(s string) template.HTML {
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return template.HTML(s)
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}
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func init() {
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var err error
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tmpl, err = template.New("blog").Funcs(template.FuncMap{"safehtml": safehtml}).Parse(pageTpl)
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if err != nil {
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panic(err)
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}
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}
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func render(w http.ResponseWriter, data pageData) {
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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tmpl.Execute(w, data)
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}
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func RegisterRoutes(mux *http.ServeMux, contentDir string) error {
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ogDir := filepath.Join(contentDir, "..", "og")
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store := NewStore()
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if err := store.Load(contentDir); err != nil {
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log.Printf("blog: warning: could not load posts from %s: %v", contentDir, err)
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}
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store.GenerateOGImages(ogDir)
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mux.Handle("/blog/og/", http.StripPrefix("/blog/og/", http.FileServer(http.Dir(ogDir))))
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mux.HandleFunc("/blog/admin/reload", func(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.Error(w, "POST only", http.StatusMethodNotAllowed)
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return
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}
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if err := store.Load(contentDir); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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store.GenerateOGImages(ogDir)
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w.Write([]byte("reloaded\n"))
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})
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mux.HandleFunc("/blog/posts/", func(w http.ResponseWriter, r *http.Request) {
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slug := strings.TrimPrefix(r.URL.Path, "/blog/posts/")
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if slug == "" || strings.Contains(slug, "/") {
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http.NotFound(w, r)
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return
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}
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p, ok := store.Get(slug)
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if !ok {
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http.NotFound(w, r)
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return
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}
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render(w, pageData{
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Title: p.Title + " — Chaosmith Systems",
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Posts: store.All(),
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Post: p,
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})
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})
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mux.HandleFunc("/blog/", func(w http.ResponseWriter, r *http.Request) {
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if r.URL.Path != "/blog/" {
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http.NotFound(w, r)
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return
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}
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render(w, pageData{
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Title: "Chaosmith Systems — Field Notes",
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Posts: store.All(),
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})
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})
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log.Printf("blog: loaded %d post(s) from %s, mounted at /blog/", store.Count(), contentDir)
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return nil
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}
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