(READ ONLY) Margin is an open annotation layer for the internet. Powered by the AT Protocol.
margin.at
extension
web
atproto
comments
make sure the collection url triggers the OG handler and add lucide to emoji to handle icons in og image
+90
-2
+1
backend/cmd/server/main.go
+1
backend/cmd/server/main.go
···
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r.Get("/og-image", ogHandler.HandleOGImage)
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r.Get("/annotation/{did}/{rkey}", ogHandler.HandleAnnotationPage)
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r.Get("/at/{did}/{rkey}", ogHandler.HandleAnnotationPage)
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r.Get("/collection/{uri}", ogHandler.HandleCollectionPage)
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staticDir := getEnv("STATIC_DIR", "../web/dist")
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serveStatic(r, staticDir)
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-2
backend/internal/api/og.go
+89
-2
backend/internal/api/og.go
···
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"Bluesky",
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}
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var lucideToEmoji = map[string]string{
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"folder": "📁",
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"star": "⭐",
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"heart": "❤️",
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"bookmark": "🔖",
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"lightbulb": "💡",
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"zap": "⚡",
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"coffee": "☕",
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"music": "🎵",
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"camera": "📷",
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"code": "💻",
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"globe": "🌍",
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"flag": "🚩",
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"tag": "🏷️",
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"box": "📦",
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"archive": "🗄️",
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"file": "📄",
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"image": "🖼️",
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"video": "🎬",
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"mail": "✉️",
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"pin": "📍",
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"calendar": "📅",
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"clock": "🕐",
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"search": "🔍",
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"settings": "⚙️",
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"user": "👤",
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"users": "👥",
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"home": "🏠",
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"briefcase": "💼",
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"gift": "🎁",
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"award": "🏆",
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"target": "🎯",
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"trending": "📈",
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"activity": "📊",
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"cpu": "🔲",
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"database": "🗃️",
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"cloud": "☁️",
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"sun": "☀️",
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"moon": "🌙",
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"flame": "🔥",
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"leaf": "🍃",
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}
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func iconToEmoji(icon string) string {
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if strings.HasPrefix(icon, "icon:") {
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name := strings.TrimPrefix(icon, "icon:")
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if emoji, ok := lucideToEmoji[name]; ok {
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return emoji
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}
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return "📁"
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}
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return icon
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}
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func isCrawler(userAgent string) bool {
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ua := strings.ToLower(userAgent)
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for _, bot := range crawlerUserAgents {
···
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collectionURI := fmt.Sprintf("at://%s/at.margin.collection/%s", did, rkey)
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collection, err := h.db.GetCollectionByURI(collectionURI)
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if err == nil && collection != nil {
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h.serveCollectionOG(w, collection)
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return
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}
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h.serveIndexHTML(w, r)
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}
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func (h *OGHandler) HandleCollectionPage(w http.ResponseWriter, r *http.Request) {
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path := r.URL.Path
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prefix := "/collection/"
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if !strings.HasPrefix(path, prefix) {
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h.serveIndexHTML(w, r)
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return
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}
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uriParam := strings.TrimPrefix(path, prefix)
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if uriParam == "" {
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h.serveIndexHTML(w, r)
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return
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}
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uri, err := url.QueryUnescape(uriParam)
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if err != nil {
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uri = uriParam
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}
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if !isCrawler(r.UserAgent()) {
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h.serveIndexHTML(w, r)
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return
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}
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collection, err := h.db.GetCollectionByURI(uri)
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if err == nil && collection != nil {
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h.serveCollectionOG(w, collection)
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return
···
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func (h *OGHandler) serveCollectionOG(w http.ResponseWriter, collection *db.Collection) {
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icon := "📁"
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if collection.Icon != nil && *collection.Icon != "" {
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icon = *collection.Icon
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icon = iconToEmoji(*collection.Icon)
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}
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title := fmt.Sprintf("%s %s", icon, collection.Name)
···
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icon := "📁"
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if collection.Icon != nil && *collection.Icon != "" {
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icon = *collection.Icon
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icon = iconToEmoji(*collection.Icon)
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}
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text = fmt.Sprintf("%s %s", icon, collection.Name)
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if collection.Description != nil && *collection.Description != "" {