initial commit on Federted servers

internal/markdown/markdown.go

@@ -0,0 +1,77 @@
+package markdown
+
+import (
+	"fmt"
+	"github.com/andrew/go-computer/internal/db"
+	"net/http"
+	"regexp"
+	"strings"
+)
+
+var slugRE = regexp.MustCompile(`[^a-z0-9]+`)
+
+func Slugify(s string) string {
+	s = strings.Trim(slugRE.ReplaceAllString(strings.ToLower(s), "-"), "-")
+	if len(s) > 60 {
+		s = s[:60]
+	}
+	if s == "" {
+		s = "untitled"
+	}
+	return s
+}
+func text(b db.Object, k string) string { s, _ := b[k].(string); return s }
+func BookmarkDocument(b db.Object) string {
+	title := text(b, "title")
+	if title == "" {
+		title = text(b, "url")
+	}
+	out := "# " + title + "\n\n- URL: " + text(b, "url") + "\n"
+	if s := text(b, "dueDate"); len(s) >= 10 {
+		out += "- Date: " + s[:10] + "\n"
+	}
+	tags := []string{}
+	if a, ok := b["tags"].([]any); ok {
+		for _, x := range a {
+			bt, _ := x.(map[string]any)
+			t, _ := bt["tag"].(map[string]any)
+			tags = append(tags, text(t, "name"))
+		}
+	}
+	if len(tags) > 0 {
+		out += "- Tags: " + strings.Join(tags, ", ") + "\n"
+	}
+	return out + "\n" + strings.TrimSpace(text(b, "notes")) + "\n"
+}
+func PageDocument(p db.Object) string {
+	out := "# " + text(p, "title") + "\n\n" + strings.TrimSpace(text(p, "content")) + "\n"
+	if a, ok := p["bookmarks"].([]any); ok && len(a) > 0 {
+		out += "\n## Links\n"
+		for _, x := range a {
+			pb, _ := x.(map[string]any)
+			b, _ := pb["bookmark"].(map[string]any)
+			title := text(b, "title")
+			if title == "" {
+				title = text(b, "url")
+			}
+			title = strings.NewReplacer("[", "", "]", "", "\n", " ").Replace(title)
+			desc := strings.Join(strings.Fields(text(b, "description")), " ")
+			rs := []rune(desc)
+			if len(rs) > 160 {
+				desc = string(rs[:160])
+			}
+			out += "- [" + title + "](" + text(b, "url") + ")"
+			if desc != "" {
+				out += " — " + desc
+			}
+			out += "\n"
+		}
+	}
+	return out + "\n<!-- exported from computer " + text(p, "updatedAt") + " -->\n"
+}
+func Send(w http.ResponseWriter, body, name string) {
+	w.Header().Set("Content-Type", "text/markdown; charset=utf-8")
+	w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.md"`, Slugify(name)))
+	w.Header().Set("Cache-Control", "no-store")
+	_, _ = w.Write([]byte(body))
+}