web: show union of tags when viewing thread

web/src/view/mod.rs

@@ -1,5 +1,5 @@
 use std::{
-    collections::hash_map::DefaultHasher,
+    collections::{hash_map::DefaultHasher, HashSet},
     hash::{Hash, Hasher},
 };
 
@@ -265,6 +265,16 @@ fn raw_text_message(contents: &str) -> Node<Msg> {
 fn thread(thread: &ShowThreadQueryThread) -> Node<Msg> {
     // TODO(wathiede): show per-message subject if it changes significantly from top-level subject
     set_title(&thread.subject);
+    let mut tags: Vec<_> = thread
+        .messages
+        .iter()
+        .fold(HashSet::new(), |mut tags, msg| {
+            tags.extend(msg.tags.clone());
+            tags
+        })
+        .into_iter()
+        .collect();
+    tags.sort();
     let messages = thread.messages.iter().map(|msg| {
         div![
             C!["message"],
@@ -323,7 +333,12 @@ fn thread(thread: &ShowThreadQueryThread) -> Node<Msg> {
     });
     div![
         C!["thread"],
-        p![C!["is-size-4"], &thread.subject],
+        p![
+            C!["is-size-4"],
+            &thread.subject,
+            " ",
+            tags_chiclet(&tags, false)
+        ],
         messages,
         /* TODO(wathiede): plumb in orignal id
         a![
@@ -353,8 +368,8 @@ fn view_content_tree(content_tree: &str) -> Node<Msg> {
                 debug_open.set(!debug_open.get());
             })
         ],
-        IF!(debug_open.get() => 
-        pre![C!["content-tree"], content_tree]),
+        IF!(debug_open.get() =>
+            pre![C!["content-tree"], content_tree]),
     ]
 }