microposts.gno

 1package microposts
 2
 3import (
 4	"errors"
 5	"std"
 6	"time"
 7
 8	"gno.land/p/demo/ufmt"
 9	"gno.land/p/moul/md"
10)
11
12var posts []*Post
13
14type Post struct {
15	text      string
16	author    std.Address
17	createdAt time.Time
18}
19
20// CreatePost is automatically exposed as an endpoint
21// It can be accessed by anyone who has a user ID (key pair)
22func CreatePost(text string) error {
23	if text == "" {
24		return errors.New("empty post text")
25	}
26
27	posts = append(posts, &Post{
28		text:      text,
29		author:    std.PrevRealm().Addr(), // provided by env
30		createdAt: time.Now(),
31	})
32
33	return nil
34}
35
36func Render(_ string) string {
37	out := md.H1("Posts")
38
39	if len(posts) == 0 {
40		out += "No posts."
41		return out
42	}
43
44	for i := len(posts) - 1; i >= 0; i-- {
45		out += md.H3(ufmt.Sprintf("Post #%d\n\n", i))
46		out += posts[i].String()
47		out += "---\n\n"
48	}
49
50	return out
51}
52
53func (p Post) String() string {
54	out := p.text
55	out += "\n\n"
56	out += ufmt.Sprintf("_%s, by %s_", p.createdAt.Format("02 Jan 2006, 15:04"), p.author)
57	out += "\n\n"
58
59	return out
60}