fix typing activity

spacetimedb/src/views.rs

@@ -30,14 +30,16 @@ pub struct VisibleMessageRow {
 #[spacetimedb::view(accessor = visible_typing_activity, public)]
 pub fn visible_typing_activity(ctx: &ViewContext) -> Vec<TypingActivity> {
     let identity = ctx.sender();
-    let mut results = Vec::new();
+    let mut results = std::collections::HashMap::new();
 
     // 1. Server channels
     for member in ctx.db.server_member().identity().filter(identity) {
         if let Some(s) = ctx.db.server().id().find(member.server_id) {
             for chan_meta in s.channels {
                 for activity in ctx.db.typing_activity().channel_id().filter(chan_meta.id) {
-                    results.push(activity);
+                    if activity.typing {
+                        results.insert(activity.identity, activity.clone());
+                    }
                 }
             }
         }
@@ -54,11 +56,13 @@ pub fn visible_typing_activity(ctx: &ViewContext) -> Vec<TypingActivity> {
 
     for channel_id in dm_channel_ids {
         for activity in ctx.db.typing_activity().channel_id().filter(channel_id) {
-            results.push(activity);
+            if activity.typing {
+                results.insert(activity.identity, activity.clone());
+            }
         }
     }
 
-    results
+    results.into_values().collect()
 }
 
 #[derive(spacetimedb::SpacetimeType)]