chore: update fosdem slides

Signed-off-by: moul <[email protected]>

Author: moul

presentations/2025-02-01--fosdem--manfred/code/micropost1.gno

@@ -0,0 +1,22 @@
+package microposts
+
+import (
+	"std" // gno specific
+	"time"
+)
+
+var posts []*Post
+
+type Post struct {
+	text      string
+	author    std.Address
+	createdAt time.Time
+}
+
+func CreatePost(text string) {
+	posts = append(posts, &Post{
+		text:      text,
+		author:    std.PrevRealm().Addr(), // provided by env
+		createdAt: time.Now(),
+	})
+}

presentations/2025-02-01--fosdem--manfred/code/micropost2.gno

@@ -0,0 +1,19 @@
+package microposts
+
+import "gno.land/p/demo/ufmt"
+
+func Render(_ string) string {
+	out := "# Posts\n"
+	for i := len(posts) - 1; i >= 0; i-- {
+		out += ufmt.Sprintf("### Post #%d\n", i))
+		out += posts[i].String()
+	}
+	return out
+}
+
+func (p Post) String() string {
+	out := p.text + "\n"
+	out += ufmt.Sprintf("_%s, by %s_\n",
+		p.createdAt.Format("02 Jan 2006, 15:04"), p.author)
+	return out
+}

presentations/2025-02-01--fosdem--manfred/code/micropost_post.gno

@@ -0,0 +1,18 @@
+package microposts
+
+import (
+	"std"
+	"time"
+)
+
+type Post struct {
+	text      string
+	author    std.Address
+	createdAt time.Time
+}
+
+func (p Post) String() string {
+	out := p.text + "\n"
+	out += "_" + p.createdAt.Format("02 Jan 2006, 15:04") + ", by " + p.author.String() + "_"
+	return out
+}

presentations/2025-02-01--fosdem--manfred/code/micropost_realm.gno

@@ -0,0 +1,25 @@
+package microposts
+
+import (
+	"std"
+	"time"
+)
+
+var posts []*Post // automatically persisted
+
+func CreatePost(text string) {
+	posts = append(posts, &Post{
+		text:      text,
+		author:    std.PrevRealm().Addr(), // provided by env
+		createdAt: time.Now(),
+	})
+}
+
+func Render(_ string) string {
+	out := "# Posts\n"
+	for i := len(posts) - 1; i >= 0; i-- {
+		out += "### Post " + strconv.Itoa(i) + "\n" + posts[i].String()
+	}
+	return out
+}
+

presentations/2025-02-01--fosdem--manfred/presentation.slide

@@ -59,10 +59,20 @@ with built-in **state persistence** and **safe execution**.
 - global variables persist across transactions
 - no need for external storage or db
 
-## microposts.gno
+## microposts
 
 .image ./img/microposts.png _ 1000
 
+## microposts/post.gno
+
+// .code ./code/micropost1.gno
+.code ./code/micropost_post.gno
+
+## microposts/realm.gno
+
+// .code ./code/micropost2.gno
+.code ./code/micropost_realm.gno
+
 ## microposts demo
 
 .image ./img/micropost1.png _ 500