chore(examples): add microposts example

examples/gno.land/r/moul/microposts/README.md

@@ -0,0 +1,5 @@
+# fork of `leon/fosdem25/microposts`
+
+removing optional lines to make the code more concise for slides.
+
+Original work here: https://gno.land/r/leon/fosdem25/microposts

examples/gno.land/r/moul/microposts/gno.mod

@@ -0,0 +1 @@
+module gno.land/r/moul/microposts

examples/gno.land/r/moul/microposts/microposts_test.gno

@@ -0,0 +1,3 @@
+package microposts
+
+// empty file just to make sure that `gno test` tries to parse the implementation.OB

examples/gno.land/r/moul/microposts/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
+}

examples/gno.land/r/moul/microposts/realm.gno

@@ -0,0 +1,25 @@
+package microposts
+
+import (
+	"std"
+	"strconv"
+	"time"
+)
+
+var posts []*Post
+
+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
+}