HTML and plain text for new post mail notifications

src/templates.rs

@@ -1,6 +1,6 @@
-use askama::Template;
-
 use crate::domain::PostEntry;
+use askama::Template;
+use uuid::Uuid;
 
 #[derive(Template)]
 pub enum MessageTemplate {
@@ -49,3 +49,43 @@ pub struct ConfirmTemplate;
 #[derive(Template)]
 #[template(path = "../templates/404.html")]
 pub struct NotFoundTemplate;
+
+#[derive(Template)]
+#[template(path = "../templates/email/new_post.html")]
+pub struct NewPostEmailTemplate<'a> {
+    pub base_url: &'a str,
+    pub post_title: &'a str,
+    pub post_id: &'a Uuid,
+    pub post_excerpt: &'a str,
+}
+
+impl<'a> NewPostEmailTemplate<'a> {
+    pub fn text_version(&self) -> String {
+        format!(
+            r#"New post available!
+
+Hello there!
+I just published a new post that I think you'll find interesting:
+
+"{}"
+
+Read the full post: {}/posts/{}
+
+This post covers practical insights and real-world examples that I hope will be valuable for your backend development journey.
+
+Thanks for being a subscriber!
+
+Best regards,
+Alphonse
+
+---
+
+zero2prod - Building better backends with Rust
+Visit the blog: {}
+Unsubscribe: {}/unsubscribe
+
+You're receiving this because you subscribed to the zero2prod newsletter."#,
+            self.post_title, self.base_url, self.post_id, self.base_url, self.base_url,
+        )
+    }
+}