Added a page for nonexistent posts

server/app/RenderPost.go

@@ -10,23 +10,40 @@ import (
 )
 
 func RenderPost(ctx web.Context, id string) error {
-	post := Posts[id]
-	head := fmt.Sprintf(`<title>%s</title><meta name="keywords" content="%s">`, post.Title, strings.Join(post.Tags, ","))
-	content := ""
+	var (
+		post    = Posts[id]
+		title   string
+		content string
+		created string
+		tags    []string
+	)
 
-	if slices.Contains(post.Tags, "article") {
+	if post != nil {
+		title = post.Title
+		content = post.Content
+		created = post.Created
+		tags = post.Tags
+	} else {
+		title = "Not found"
+		content = fmt.Sprintf("Post `%s` does not exist.", id)
+		ctx.Status(404)
+	}
+
+	head := fmt.Sprintf(`<title>%s</title><meta name="keywords" content="%s">`, title, strings.Join(tags, ","))
+
+	if slices.Contains(tags, "article") {
 		content = fmt.Sprintf(
 			`<article><header><h1>%s</h1><time datetime="%s">%s</time></header>%s</article>`,
-			post.Title,
-			post.Created,
-			post.Created[:len("YYYY-MM-DD")],
-			markdown.Render(post.Content),
+			title,
+			created,
+			created[:len("YYYY-MM-DD")],
+			markdown.Render(content),
 		)
 	} else {
 		content = fmt.Sprintf(
 			`<h2>%s</h2>%s`,
-			post.Title,
-			markdown.Render(post.Content),
+			title,
+			markdown.Render(content),
 		)
 	}
 

server/pages/Sitemap.go

@@ -13,7 +13,6 @@ func Sitemap(ctx web.Context) error {
 	html := bytes.Buffer{}
 	html.WriteString("https://urbach.dev\n")
 	html.WriteString("https://urbach.dev/blog\n")
-
 	articles := []*app.Post{}
 
 	for _, post := range app.Posts {