web: show union of tags when viewing thread

web/graphql/schema.json

@@ -504,6 +504,30 @@
                   }
                 }
               }
+            },
+            {
+              "args": [],
+              "deprecationReason": null,
+              "description": null,
+              "isDeprecated": false,
+              "name": "tags",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "LIST",
+                  "name": null,
+                  "ofType": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "SCALAR",
+                      "name": "String",
+                      "ofType": null
+                    }
+                  }
+                }
+              }
             }
           ],
           "inputFields": null,

web/graphql/show_thread.graphql

@@ -4,6 +4,7 @@ query ShowThreadQuery($threadId: String!) {
     messages {
       id
       subject
+      tags
       from {
         name
         addr

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![
@@ -354,7 +369,7 @@ fn view_content_tree(content_tree: &str) -> Node<Msg> {
             })
         ],
         IF!(debug_open.get() =>
-        pre![C!["content-tree"], content_tree]),
+            pre![C!["content-tree"], content_tree]),
     ]
 }