add note to self to the default global search screen with empty search text

Session/Home/GlobalSearch/GlobalSearchViewController.swift

@@ -12,7 +12,7 @@ class GlobalSearchViewController: BaseVC, UITableViewDelegate, UITableViewDataSo
             refreshSearchResults()
         }
     }
-    var recentSearchResults: [String] = []
+    var recentSearchResults: [String] = Array(Storage.shared.getRecentSearchResults().reversed())
     var searchResultSet: HomeScreenSearchResultSet = HomeScreenSearchResultSet.empty
     private var lastSearchText: String?
     var searcher: FullTextSearcher {
@@ -98,7 +98,6 @@ class GlobalSearchViewController: BaseVC, UITableViewDelegate, UITableViewDataSo
     }
     
     private func reloadTableData() {
-        recentSearchResults = Array(Storage.shared.getRecentSearchResults().reversed())
         tableView.reloadData()
     }
     
@@ -138,7 +137,7 @@ class GlobalSearchViewController: BaseVC, UITableViewDelegate, UITableViewDataSo
 
         let searchText = rawSearchText.stripped
         guard searchText.count > 0 else {
-            searchResultSet = HomeScreenSearchResultSet.empty
+            searchResultSet = HomeScreenSearchResultSet.noteToSelfOnly
             lastSearchText = nil
             reloadTableData()
             return
@@ -225,7 +224,7 @@ extension GlobalSearchViewController {
     
     private func show(_ thread: TSThread, highlightedMessageID: String?, animated: Bool, isFromRecent: Bool = false) {
         if let threadId = thread.uniqueId {
-            Storage.shared.addSearchResults(threadID: threadId)
+            recentSearchResults = Array(Storage.shared.addSearchResults(threadID: threadId).reversed())
         }
         
         DispatchMainThreadSafe {

Session/Home/GlobalSearch/Storage+RecentSearchResults.swift

@@ -19,7 +19,7 @@ extension Storage{
         }
     }
     
-    public func addSearchResults(threadID: String) {
+    public func addSearchResults(threadID: String) -> [String] {
         var recentSearchResults = getRecentSearchResults()
         if recentSearchResults.count > 20 { recentSearchResults.remove(at: 0) } // Limit the size of the collection to 20
         if let index = recentSearchResults.firstIndex(of: threadID) { recentSearchResults.remove(at: index) }
@@ -27,5 +27,6 @@ extension Storage{
         Storage.write { transaction in
             transaction.setObject(recentSearchResults, forKey: Storage.recentSearchResultKey, inCollection: Storage.recentSearchResultDatabaseCollection)
         }
+        return recentSearchResults
     }
 }

SignalUtilitiesKit/Messaging/FullTextSearcher.swift

@@ -65,6 +65,20 @@ public class HomeScreenSearchResultSet: NSObject {
     public class var empty: HomeScreenSearchResultSet {
         return HomeScreenSearchResultSet(searchText: "", conversations: [], messages: [])
     }
+    
+    public class var noteToSelfOnly: HomeScreenSearchResultSet {
+        var conversations: [ConversationSearchResult<ConversationSortKey>] = []
+        Storage.read { transaction in
+            if let thread = TSContactThread.getWithContactSessionID(getUserHexEncodedPublicKey(), transaction: transaction) {
+                let threadViewModel = ThreadViewModel(thread: thread, transaction: transaction)
+                let sortKey = ConversationSortKey(creationDate: thread.creationDate,
+                                                  lastMessageReceivedAtDate: thread.lastInteractionForInbox(transaction: transaction)?.receivedAtDate())
+                let searchResult = ConversationSearchResult(thread: threadViewModel, sortKey: sortKey)
+                conversations.append(searchResult)
+            }
+        }
+        return HomeScreenSearchResultSet(searchText: "", conversations: conversations, messages: [])
+    }
 
     public var isEmpty: Bool {
         return conversations.isEmpty && messages.isEmpty