guestbook.gno

 1package guestbook
 2
 3import "strconv"
 4
 5var entries []string
 6
 7// Sign adds a message to the on-chain guestbook.
 8func Sign(cur realm, msg string) {
 9	if msg == "" {
10		panic("message required")
11	}
12	if len(msg) > 200 {
13		panic("message too long")
14	}
15	entries = append(entries, msg)
16}
17
18// Render draws the public guestbook page.
19func Render(path string) string {
20	out := "# Guestbook\n\n"
21	out += "A simple on-chain guestbook. Call `Sign(\"your message\")` to add an entry.\n\n"
22	out += "## Entries (" + strconv.Itoa(len(entries)) + ")\n\n"
23	if len(entries) == 0 {
24		out += "_No entries yet._\n"
25		return out
26	}
27	for i := len(entries) - 1; i >= 0; i-- {
28		out += "- " + entries[i] + "\n"
29	}
30	return out
31}