ui: add ndb search to universe view

This PR adds the NDB search functionality from the pull down search in the
posting timeline to the universe view.

Changelog-Added: Added NDB search functionality to the universe view

Signed-off-by: ericholguin <ericholguin@apache.org>

damus.xcodeproj/project.pbxproj

@@ -395,6 +395,9 @@
 		50B5685329F97CB400A23243 /* CredentialHandler.swift in Sources */ = {isa = PBXBuildFile; fileRef = 50B5685229F97CB400A23243 /* CredentialHandler.swift */; };
 		50C3E08A2AA8E3F7006A4BC0 /* AVPlayer+Additions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 50C3E0892AA8E3F7006A4BC0 /* AVPlayer+Additions.swift */; };
 		50DA11262A16A23F00236234 /* Launch.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 50DA11252A16A23F00236234 /* Launch.storyboard */; };
+		5C0567582C8FBC560073F23A /* NDBSearchView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5C0567572C8FBC560073F23A /* NDBSearchView.swift */; };
+		5C0567592C8FBDE30073F23A /* Router.swift in Sources */ = {isa = PBXBuildFile; fileRef = D2277EE92A089BD5006C3807 /* Router.swift */; };
+		5C05675A2C8FBDE70073F23A /* NDBSearchView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5C0567572C8FBC560073F23A /* NDBSearchView.swift */; };
 		5C0707D12A1ECB38004E7B51 /* DamusLogoGradient.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5C0707D02A1ECB38004E7B51 /* DamusLogoGradient.swift */; };
 		5C14C29B2BBBA29C00079FD2 /* RelaySoftwareDetail.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5C14C29A2BBBA29C00079FD2 /* RelaySoftwareDetail.swift */; };
 		5C14C29D2BBBA40B00079FD2 /* RelayAdminDetail.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5C14C29C2BBBA40B00079FD2 /* RelayAdminDetail.swift */; };
@@ -928,7 +931,6 @@
 		D73E5F782C6A9A5C007EB227 /* NdbNote+.swift in Sources */ = {isa = PBXBuildFile; fileRef = D798D2272B085CDA00234419 /* NdbNote+.swift */; };
 		D73E5F792C6A9C4C007EB227 /* HomeModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C63334F283D40E500B1C9C3 /* HomeModel.swift */; };
 		D73E5F7A2C6A9C55007EB227 /* NotificationFormatter.swift in Sources */ = {isa = PBXBuildFile; fileRef = D70A3B162B02DCE5008BD568 /* NotificationFormatter.swift */; };
-		D73E5F7B2C6A9D0F007EB227 /* Router.swift in Sources */ = {isa = PBXBuildFile; fileRef = D2277EE92A089BD5006C3807 /* Router.swift */; };
 		D73E5F7C2C6A9D4F007EB227 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4CE6DEE827F7A08100C66700 /* ContentView.swift */; };
 		D73E5F7F2C6AA066007EB227 /* DamusAliases.swift in Sources */ = {isa = PBXBuildFile; fileRef = D73E5F7E2C6AA066007EB227 /* DamusAliases.swift */; };
 		D73E5F812C6AA07A007EB227 /* HighlighterExtensionAliases.swift in Sources */ = {isa = PBXBuildFile; fileRef = D73E5F802C6AA07A007EB227 /* HighlighterExtensionAliases.swift */; };
@@ -1832,6 +1834,7 @@
 		50B5685229F97CB400A23243 /* CredentialHandler.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CredentialHandler.swift; sourceTree = "<group>"; };
 		50C3E0892AA8E3F7006A4BC0 /* AVPlayer+Additions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "AVPlayer+Additions.swift"; sourceTree = "<group>"; };
 		50DA11252A16A23F00236234 /* Launch.storyboard */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; path = Launch.storyboard; sourceTree = "<group>"; };
+		5C0567572C8FBC560073F23A /* NDBSearchView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NDBSearchView.swift; sourceTree = "<group>"; };
 		5C0707D02A1ECB38004E7B51 /* DamusLogoGradient.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DamusLogoGradient.swift; sourceTree = "<group>"; };
 		5C14C29A2BBBA29C00079FD2 /* RelaySoftwareDetail.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RelaySoftwareDetail.swift; sourceTree = "<group>"; };
 		5C14C29C2BBBA40B00079FD2 /* RelayAdminDetail.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RelayAdminDetail.swift; sourceTree = "<group>"; };
@@ -2962,6 +2965,7 @@
 			children = (
 				4CCEB7AD29B53D260078AA28 /* SearchingEventView.swift */,
 				4C9D6D1A2B1D35D7004E5CD9 /* PullDownSearch.swift */,
+				5C0567572C8FBC560073F23A /* NDBSearchView.swift */,
 			);
 			path = Search;
 			sourceTree = "<group>";
@@ -4021,6 +4025,7 @@
 				5C0707D12A1ECB38004E7B51 /* DamusLogoGradient.swift in Sources */,
 				4CDD1AE02A6B305F001CD4DF /* NdbTagElem.swift in Sources */,
 				4C5F9114283D694D0052CD1C /* FollowTarget.swift in Sources */,
+				5C0567582C8FBC560073F23A /* NDBSearchView.swift in Sources */,
 				D72341192B6864F200E1E135 /* DamusPurpleEnvironment.swift in Sources */,
 				4CF0ABD629817F5B00D66079 /* ReportView.swift in Sources */,
 				4C1A9A2729DDE31900516EAC /* TranslationSettingsView.swift in Sources */,
@@ -4338,6 +4343,7 @@
 				D73E5E7A2C6A97F4007EB227 /* EventCache.swift in Sources */,
 				D73E5E7B2C6A97F4007EB227 /* DebouncedOnChange.swift in Sources */,
 				D73E5E7C2C6A97F4007EB227 /* ReplyCounter.swift in Sources */,
+				5C0567592C8FBDE30073F23A /* Router.swift in Sources */,
 				D73E5E7D2C6A97F4007EB227 /* CompatibleAttribute.swift in Sources */,
 				D73E5E7E2C6A97F4007EB227 /* Hashtags.swift in Sources */,
 				D73E5E7F2C6A97F4007EB227 /* LocalNotification.swift in Sources */,
@@ -4622,7 +4628,6 @@
 				D73E5E1B2C6A9672007EB227 /* LikeCounter.swift in Sources */,
 				D703D7A92C670E5A00A400EA /* refmap.c in Sources */,
 				D703D77B2C670BF000A400EA /* TableVerifier.swift in Sources */,
-				D73E5F7B2C6A9D0F007EB227 /* Router.swift in Sources */,
 				D703D76D2C670B4500A400EA /* ZapDataModel.swift in Sources */,
 				D703D79D2C670E0700A400EA /* node_id.c in Sources */,
 				D703D79B2C670E0000A400EA /* bech32_util.c in Sources */,
@@ -4633,6 +4638,7 @@
 				D703D76B2C670B3100A400EA /* Referenced.swift in Sources */,
 				D703D7952C670DE600A400EA /* hash_u5.c in Sources */,
 				D703D7582C670A6000A400EA /* Id.swift in Sources */,
+				5C05675A2C8FBDE70073F23A /* NDBSearchView.swift in Sources */,
 				D703D76E2C670B4900A400EA /* NdbTagsIterator.swift in Sources */,
 				D703D7A02C670E1500A400EA /* take.c in Sources */,
 				D703D7692C670B2600A400EA /* Block.swift in Sources */,

damus/Util/Router.swift

@@ -37,6 +37,7 @@ enum Route: Hashable {
     case Reactions(reactions: EventsModel)
     case Zaps(target: ZapTarget)
     case Search(search: SearchModel)
+    case NDBSearch(results:  Binding<[NostrEvent]>)
     case EULA
     case Login
     case CreateAccount
@@ -105,6 +106,8 @@ enum Route: Hashable {
             ZapsView(state: damusState, target: target)
         case .Search(let search):
             SearchView(appstate: damusState, search: search)
+        case .NDBSearch(let results):
+            NDBSearchView(damus_state: damusState, results: results)
         case .EULA:
             EULAView(nav: navigationCoordinator)
         case .Login:
@@ -200,6 +203,8 @@ enum Route: Hashable {
         case .Search(let search):
             hasher.combine("search")
             hasher.combine(search.search)
+        case .NDBSearch(let results):
+            hasher.combine("results")
         case .EULA:
             hasher.combine("eula")
         case .Login:

damus/Views/Search/NDBSearchView.swift

@@ -0,0 +1,51 @@
+//
+//  NDBSearchView.swift
+//  damus
+//
+//  Created by eric on 9/9/24.
+//
+
+import SwiftUI
+
+struct NDBSearchView: View {
+    
+    let damus_state: DamusState
+    @Binding var results: [NostrEvent]
+    
+    var body: some View {
+        ScrollView {
+            if results.count > 0 {
+                HStack {
+                    Spacer()
+                    Image("search")
+                    Text("Top hits", comment: "A label indicating that the notes being displayed below it are all top note search results")
+                    Spacer()
+                }
+                .padding()
+                .foregroundColor(.secondary)
+                
+                ForEach(results, id: \.self) { note in
+                    EventView(damus: damus_state, event: note)
+                        .onTapGesture {
+                            let event = note.get_inner_event(cache: damus_state.events) ?? note
+                            let thread = ThreadModel(event: event, damus_state: damus_state)
+                            damus_state.nav.push(route: Route.Thread(thread: thread))
+                        }
+                        .padding(.horizontal)
+                    
+                    ThiccDivider()
+                }
+                
+            } else if results.count == 0 {
+                HStack {
+                    Spacer()
+                    Image("search")
+                    Text("No results", comment: "A label indicating that note search resulted in no results")
+                    Spacer()
+                }
+                .padding()
+                .foregroundColor(.secondary)
+            }
+        }
+    }
+}

damus/Views/SearchResultsView.swift

@@ -8,6 +8,7 @@
 import SwiftUI
 
 struct MultiSearch {
+    let text: String
     let hashtag: String
     let profiles: [Pubkey]
 }
@@ -43,6 +44,7 @@ enum Search: Identifiable {
 struct InnerSearchResults: View {
     let damus_state: DamusState
     let search: Search?
+    @Binding var results: [NostrEvent]
     
     func ProfileSearchResult(pk: Pubkey) -> some View {
         FollowUserView(target: .pubkey(pk), damus_state: damus_state)
@@ -51,7 +53,35 @@ struct InnerSearchResults: View {
     func HashtagSearch(_ ht: String) -> some View {
         let search_model = SearchModel(state: damus_state, search: .filter_hashtag([ht]))
         return NavigationLink(value: Route.Search(search: search_model)) {
-            Text("Search hashtag: #\(ht)", comment: "Navigation link to search hashtag.")
+            HStack {
+                Image("search")
+                Text("#\(ht)", comment: "Navigation link to search hashtag.")
+            }
+            .padding(.horizontal, 15)
+            .padding(.vertical, 5)
+            .background(DamusColors.neutral1)
+            .cornerRadius(20)
+            .overlay(
+                RoundedRectangle(cornerRadius: 20)
+                    .stroke(DamusColors.neutral3, lineWidth: 1)
+            )
+        }
+    }
+    
+    func TextSearch(_ txt: String) -> some View {
+        return NavigationLink(value: Route.NDBSearch(results: $results)) {
+            HStack {
+                Image("search")
+                Text("Notes", comment: "Navigation link to search text.")
+            }
+            .padding(.horizontal, 15)
+            .padding(.vertical, 5)
+            .background(DamusColors.neutral1)
+            .cornerRadius(20)
+            .overlay(
+                RoundedRectangle(cornerRadius: 20)
+                    .stroke(DamusColors.neutral3, lineWidth: 1)
+            )
         }
     }
     
@@ -88,8 +118,11 @@ struct InnerSearchResults: View {
             case .naddr(let naddr):
                 SearchingEventView(state: damus_state, search_type: .naddr(naddr))
             case .multi(let multi):
-                VStack {
+                VStack(alignment: .leading) {
-                    HashtagSearch(multi.hashtag)
+                    HStack {
+                        HashtagSearch(multi.hashtag)
+                        TextSearch(multi.text)
+                    }
                     ProfilesSearch(multi.profiles)
                 }
                 
@@ -104,10 +137,47 @@ struct SearchResultsView: View {
     let damus_state: DamusState
     @Binding var search: String
     @State var result: Search? = nil
+    @State var results: [NostrEvent] = []
+    let debouncer: Debouncer = Debouncer(interval: 0.25)
+    
+    func do_search(query: String) {
+        let limit = 16
+        var note_keys = damus_state.ndb.text_search(query: query, limit: limit, order: .newest_first)
+        var res = [NostrEvent]()
+        // TODO: fix duplicate results from search
+        var keyset = Set<NoteKey>()
+
+        // try reverse because newest first is a bit buggy on partial searches
+        if note_keys.count == 0 {
+            // don't touch existing results if there are no new ones
+            return
+        }
+
+        do {
+            guard let txn = NdbTxn(ndb: damus_state.ndb) else { return }
+            for note_key in note_keys {
+                guard let note = damus_state.ndb.lookup_note_by_key_with_txn(note_key, txn: txn) else {
+                    continue
+                }
+
+                if !keyset.contains(note_key) {
+                    let owned_note = note.to_owned()
+                    res.append(owned_note)
+                    keyset.insert(note_key)
+                }
+            }
+        }
+
+        let res_ = res
+
+        Task { @MainActor [res_] in
+            results = res_
+        }
+    }
     
     var body: some View {
         ScrollView {
-            InnerSearchResults(damus_state: damus_state, search: result)
+            InnerSearchResults(damus_state: damus_state, search: result, results: $results)
                 .padding()
         }
         .frame(maxHeight: .infinity)
@@ -119,6 +189,13 @@ struct SearchResultsView: View {
             guard let txn = NdbTxn.init(ndb: damus_state.ndb) else { return }
             self.result = search_for_string(profiles: damus_state.profiles, contacts: damus_state.contacts, search: search, txn: txn)
         }
+        .onChange(of: search) { query in
+            debouncer.debounce {
+                Task.detached {
+                    do_search(query: query)
+                }
+            }
+        }
     }
 }
 
@@ -174,7 +251,7 @@ func search_for_string<Y>(profiles: Profiles, contacts: Contacts, search new: St
         return .naddr(naddr)
     }
     
-    let multisearch = MultiSearch(hashtag: make_hashtagable(searchQuery), profiles: search_profiles(profiles: profiles, contacts: contacts, search: new, txn: txn))
+    let multisearch = MultiSearch(text: new, hashtag: make_hashtagable(searchQuery), profiles: search_profiles(profiles: profiles, contacts: contacts, search: new, txn: txn))
     return .multi(multisearch)
 }