not working truncation

src/lib.rs

@@ -1,4 +1,4 @@
-use std::{collections::HashMap, time::Duration};
+use std::{collections::HashMap, fmt::Display, time::Duration};
 
 use feed_rs::parser::parse;
 use html2md::{TagHandler, TagHandlerFactory, dummy::DummyHandler};
@@ -44,7 +44,7 @@ pub struct BlogdorTheAggregator {
     blogdor_token: String, // sent *from zulip* in POSTs *to us*
 }
 
-#[derive(Debug, Default, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub struct FeedEntry {
     post_url: String,
     feed_url: String,
@@ -54,7 +54,7 @@ pub struct FeedEntry {
     published: DateTime<Utc>,
     received: DateTime<Utc>,
     feed_description: Option<String>,
-    body: Option<String>,
+    body: PostBody,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -79,6 +79,26 @@ pub enum Action {
     List,
 }
 
+#[derive(Debug, Clone, PartialEq, Eq)]
+enum PostBody {
+    Full(String),
+    Truncated(String),
+    Empty,
+}
+
+impl Display for PostBody {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let s = match self {
+            PostBody::Empty => "<no preview>".to_string(),
+            PostBody::Full(s) => s.to_owned(),
+            PostBody::Truncated(s) => {
+                format!("{s}[...]")
+            }
+        };
+        write!(f, "{s}")
+    }
+}
+
 #[derive(Debug, Clone)]
 pub struct UserRequest {
     command: FeedCommand,
@@ -571,6 +591,24 @@ async fn check_feed(
 
     feed.entries.sort_by_key(|e| std::cmp::Reverse(e.posted()));
     for post in feed.entries.into_iter().take(5) {
+        let body = post
+            .content
+            .and_then(|c| match c.body {
+                None => PostBody::Empty,
+                Some(c) => {
+                    let s = html2md::parse_html_custom(&c, &handlers)
+                        .graphemes(false)
+                        .take(ZULIP_MESSAGE_CUTOFF)
+                        .collect::<String>();
+                    if s.len() == c.len() {
+                        PostBody::Full(s)
+                    } else {
+                        PostBody::Truncated(s)
+                    }
+                }
+            })
+            .unwrap_or(PostBody::Empty);
+
         if post.posted().unwrap_or(LAST_FETCHED) > last_fetched {
             let entry = FeedEntry {
                 post_url: post
@@ -590,16 +628,9 @@ async fn check_feed(
                 published: post.posted().unwrap_or(now),
                 received: now,
                 feed_description: feed.description.to_owned().map(|d| d.content),
-                body: post.content.and_then(|c| {
-                    c.body.map(|f| {
-                        let s = html2md::parse_html_custom(&f, &handlers)
-                            .graphemes(false)
-                            .take(ZULIP_MESSAGE_CUTOFF)
-                            .collect::<String>();
-                        s.to_string()
-                    })
-                }),
+                body,
             };
+
             entries.push(entry);
         }
     }