ui: Filter out reposts where the inner event is from a person whom the user has muted. (#1216)

Issue reproduction
------------------

**Device:** iPhone 14 Pro simulator
**iOS:** 17.0
**Damus:** `bb2eb904cc`
**Steps:**

1. Repost a note from another account (Account "B")
2. Mute user "B"
3. Check home page and your own profile page. Repost shows up with a muted box.

Fix

Reviewed-by: William Casarin <jb55@jb55.com>
Signed-off-by: William Casarin <jb55@jb55.com>

damus/ContentView.swift

@@ -88,7 +88,7 @@ struct ContentView: View {
     }
 
     func content_filter(_ fstate: FilterState) -> ((NostrEvent) -> Bool) {
-        var filters = ContentFilters.defaults(damus_state!.settings)
+        var filters = ContentFilters.defaults(damus_state: damus_state!)
         filters.append(fstate.filter)
         return ContentFilters(filters: filters).filter
     }

damus/Models/ContentFilters.swift

@@ -25,7 +25,15 @@ enum FilterState : Int {
 
 /// Simple filter to determine whether to show posts with #nsfw tags
 func nsfw_tag_filter(ev: NostrEvent) -> Bool {
-        return ev.referenced_hashtags.first(where: { t in t.hashtag == "nsfw" }) == nil
+    return ev.referenced_hashtags.first(where: { t in t.hashtag == "nsfw" }) == nil
+}
+
+func get_repost_of_muted_user_filter(damus_state: DamusState) -> ((_ ev: NostrEvent) -> Bool) {
+    return { ev in
+        guard ev.known_kind == .boost else { return true }
+        guard let inner_ev = ev.get_inner_event(cache: damus_state.events) else { return true }
+        return should_show_event(keypair: damus_state.keypair, hellthreads: damus_state.muted_threads, contacts: damus_state.contacts, ev: inner_ev)
+    }
 }
 
 /// Generic filter with various tweakable settings
@@ -44,11 +52,12 @@ struct ContentFilters {
 }
 
 extension ContentFilters {
-    static func defaults(_ settings: UserSettingsStore) -> [(NostrEvent) -> Bool] {
+    static func defaults(damus_state: DamusState) -> [(NostrEvent) -> Bool] {
         var filters = Array<(NostrEvent) -> Bool>()
-        if settings.hide_nsfw_tagged_content {
+        if damus_state.settings.hide_nsfw_tagged_content {
             filters.append(nsfw_tag_filter)
         }
+        filters.append(get_repost_of_muted_user_filter(damus_state: damus_state))
         return filters
     }
 }

damus/Views/Profile/ProfileView.swift

@@ -108,6 +108,12 @@ struct ProfileView: View {
         let progress = -(yOffset + navbarHeight) / 100
         return Double(-yOffset > navbarHeight ? progress : 0)
     }
+    
+    func content_filter(_ fstate: FilterState) -> ((NostrEvent) -> Bool) {
+        var filters = ContentFilters.defaults(damus_state: damus_state)
+        filters.append(fstate.filter)
+        return ContentFilters(filters: filters).filter
+    }
 
     var bannerSection: some View {
         GeometryReader { proxy -> AnyView in
@@ -458,10 +464,10 @@ struct ProfileView: View {
                         .background(colorScheme == .dark ? Color.black : Color.white)
 
                         if filter_state == FilterState.posts {
-                            InnerTimelineView(events: profile.events, damus: damus_state, filter: FilterState.posts.filter)
+                            InnerTimelineView(events: profile.events, damus: damus_state, filter: content_filter(FilterState.posts))
                         }
                         if filter_state == FilterState.posts_and_replies {
-                            InnerTimelineView(events: profile.events, damus: damus_state, filter: FilterState.posts_and_replies.filter)
+                            InnerTimelineView(events: profile.events, damus: damus_state, filter: content_filter(FilterState.posts_and_replies))
                         }
                     }
                     .padding(.horizontal, Theme.safeAreaInsets?.left)

damus/Views/SearchHomeView.swift

@@ -16,7 +16,7 @@ struct SearchHomeView: View {
     @FocusState private var isFocused: Bool
 
     var content_filter: (NostrEvent) -> Bool {
-        let filters = ContentFilters.defaults(self.damus_state.settings)
+        let filters = ContentFilters.defaults(damus_state: self.damus_state)
         return ContentFilters(filters: filters).filter
     }