chore: add p/demo/blog.EditBlog

Signed-off-by: Manfred Touron <[email protected]>

examples/gno.land/p/demo/blog/blog.gno

@@ -72,33 +72,53 @@ func (b Blog) Render(path string) string {
 }
 
 func (b *Blog) NewPost(author std.Address, slug, title, body string, tags []string) error {
-	title = strings.TrimSpace(title)
-	body = strings.TrimSpace(body)
+	_, found := b.Posts.Get(slug)
+	if found {
+		return errors.New("slug already exists.")
+	}
 
-	if title == "" {
+	post := Post{
+		Author:    author,
+		Slug:      slug,
+		Title:     title,
+		Body:      body,
+		Tags:      tags,
+		CreatedAt: time.Now(),
+	}
+	return b.prepareAndSetPost(&post)
+}
+
+func (b *Blog) UpdatePost(slug, title, body string, tags []string) error {
+	post, found := b.Posts.Get(slug)
+	if !found {
+		return errors.New("slug does not exist.")
+	}
+	post.Slug = slug
+	post.Title = title
+	post.Body = body
+	post.Tags = tags
+	return b.prepareAndSetPost(&post)
+}
+
+func (b *Blog) prepareAndSetPost(post *Post) error {
+	post.Title = strings.TrimSpace(post.Title)
+	post.Body = strings.TrimSpace(post.Body)
+
+	if post.Title == "" {
 		return errors.New("title is missing.")
 	}
-	if body == "" {
+	if post.Body == "" {
 		return errors.New("body is missing.")
 	}
-	if slug == "" {
+	if post.Slug == "" {
 		return errors.New("slug is missing.")
 	}
-	post := b.GetPost(slug)
-	if post != nil {
-		return errors.New("slug already exists.")
-	}
-
 	// more input sanitization?
-	b.Posts.Set(slug, &Post{
-		Blog:      b,
-		Slug:      slug,
-		Title:     title,
-		Body:      body,
-		CreatedAt: time.Now(),
-		Author:    author,
-		Tags:      tags,
-	})
+
+	post.Blog = b
+	post.UpdatedAt = time.Now()
+
+	b.Posts.Set(post.Slug, post)
 	return nil
 }
 

examples/gno.land/r/gnoland/blog/gnoblog.gno

@@ -20,6 +20,16 @@ func ModAddPost(slug, title, body, tags string) {
 	checkErr(err)
 }
 
+func ModEditPost(slug, title, body, tags string) {
+	assertIsModerator()
+
+	tagList := strings.Split(tags, ",")
+	err := b.EditPost(slug, title, body, tagList)
+	if err != nil {
+		panic(err)
+	}
+}
+
 func AddComment(postSlug, comment string) {
 	assertIsCommenter()
 	assertNotInPause()