From fd829f3fd259c0154bf63113eea6a7908a9a38e8 Mon Sep 17 00:00:00 2001
From: Mike Dilger <mike@ezicheq.com>
Date: Tue, 7 Mar 2023 16:36:18 +1300
Subject: [PATCH] Use a global viewed events map that we can later save

---
 src/globals.rs          | 9 +++++++++
 src/ui/feed/note/mod.rs | 5 +++--
 src/ui/mod.rs           | 2 --
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/globals.rs b/src/globals.rs
index 5931a7e4..5435786a 100644
--- a/src/globals.rs
+++ b/src/globals.rs
@@ -47,6 +47,13 @@ pub struct Globals {
     /// stored with Url they came from and Subscription they came in on
     pub incoming_events: RwLock<Vec<(Event, RelayUrl, Option<String>)>>,
 
+    /// Viewed events
+    pub viewed_events: DashSet<Id>,
+
+    /// Periodically this flushes to the database and clears.
+    /// We need the rwlock to drain it properly
+    pub new_viewed_events: RwLock<DashSet<Id>>,
+
     /// All relationships between events
     pub relationships: RwLock<HashMap<Id, Vec<(Id, Relationship)>>>,
 
@@ -116,6 +123,8 @@ lazy_static! {
             tmp_overlord_receiver: Mutex::new(Some(tmp_overlord_receiver)),
             events: Events::new(),
             incoming_events: RwLock::new(Vec::new()),
+            viewed_events: DashSet::new(),
+            new_viewed_events: RwLock::new(DashSet::new()),
             relationships: RwLock::new(HashMap::new()),
             people: People::new(),
             all_relays: DashMap::new(),
diff --git a/src/ui/feed/note/mod.rs b/src/ui/feed/note/mod.rs
index 22186e32..4afff099 100644
--- a/src/ui/feed/note/mod.rs
+++ b/src/ui/feed/note/mod.rs
@@ -86,7 +86,7 @@ pub(super) fn render_note(
         }
     };
 
-    let is_new = !app.viewed.contains(&note_data.event.id);
+    let is_new = !GLOBALS.viewed_events.contains(&note_data.event.id);
 
     let is_main_event: bool = {
         let feed_kind = GLOBALS.feed.get_feed_kind();
@@ -143,7 +143,8 @@ pub(super) fn render_note(
 
         // Mark post as viewed if hovered AND we are not scrolling
         if inner_response.response.hovered() && app.current_scroll_offset == 0.0 {
-            app.viewed.insert(id);
+            GLOBALS.viewed_events.insert(id);
+            GLOBALS.new_viewed_events.blocking_write().insert(id);
         }
     });
 
diff --git a/src/ui/mod.rs b/src/ui/mod.rs
index 65818651..f83292e5 100644
--- a/src/ui/mod.rs
+++ b/src/ui/mod.rs
@@ -115,7 +115,6 @@ struct GossipUi {
     // Post rendering
     render_raw: Option<Id>,
     render_qr: Option<Id>,
-    viewed: HashSet<Id>,
     approved: HashSet<Id>, // content warning posts
     height: HashMap<Id, f32>,
 
@@ -260,7 +259,6 @@ impl GossipUi {
             qr_codes: HashMap::new(),
             render_raw: None,
             render_qr: None,
-            viewed: HashSet::new(),
             approved: HashSet::new(),
             height: HashMap::new(),
             person_qr: None,