From 39cdc013176db4b8e19197e1128ccb4c869f3a2d Mon Sep 17 00:00:00 2001
From: CMK <cirno.mainasuk@gmail.com>
Date: Thu, 22 Jul 2021 14:13:49 +0800
Subject: [PATCH] fix: search history not isolate issue

---
 CoreDataStack/Entity/SearchHistory.swift      | 17 +++++++++++++++++
 ...SearchHistoryFetchedResultController.swift | 19 +++++++++++++++++++
 .../SearchHistoryViewModel.swift              |  9 +++++++++
 3 files changed, 45 insertions(+)

diff --git a/CoreDataStack/Entity/SearchHistory.swift b/CoreDataStack/Entity/SearchHistory.swift
index 37191bbe..3894d1c1 100644
--- a/CoreDataStack/Entity/SearchHistory.swift
+++ b/CoreDataStack/Entity/SearchHistory.swift
@@ -99,3 +99,20 @@ extension SearchHistory: Managed {
         return [NSSortDescriptor(keyPath: \SearchHistory.updatedAt, ascending: false)]
     }
 }
+
+extension SearchHistory {
+    static func predicate(domain: String) -> NSPredicate {
+        return NSPredicate(format: "%K == %@", #keyPath(SearchHistory.domain), domain)
+    }
+
+    static func predicate(userID: String) -> NSPredicate {
+        return NSPredicate(format: "%K == %@", #keyPath(SearchHistory.userID), userID)
+    }
+
+    public static func predicate(domain: String, userID: String) -> NSPredicate {
+        return NSCompoundPredicate(andPredicateWithSubpredicates: [
+            predicate(domain: domain),
+            predicate(userID: userID)
+        ])
+    }
+}
diff --git a/Mastodon/Diffiable/FetchedResultsController/SearchHistoryFetchedResultController.swift b/Mastodon/Diffiable/FetchedResultsController/SearchHistoryFetchedResultController.swift
index b83bfe66..6d4461ea 100644
--- a/Mastodon/Diffiable/FetchedResultsController/SearchHistoryFetchedResultController.swift
+++ b/Mastodon/Diffiable/FetchedResultsController/SearchHistoryFetchedResultController.swift
@@ -17,6 +17,8 @@ final class SearchHistoryFetchedResultController: NSObject {
     var disposeBag = Set<AnyCancellable>()
 
     let fetchedResultsController: NSFetchedResultsController<SearchHistory>
+    let domain = CurrentValueSubject<String?, Never>(nil)
+    let userID = CurrentValueSubject<Mastodon.Entity.Status.ID?, Never>(nil)
 
     // output
     let objectIDs = CurrentValueSubject<[NSManagedObjectID], Never>([])
@@ -38,6 +40,23 @@ final class SearchHistoryFetchedResultController: NSObject {
         super.init()
 
         fetchedResultsController.delegate = self
+
+        Publishers.CombineLatest(
+            self.domain.removeDuplicates(),
+            self.userID.removeDuplicates()
+        )
+        .receive(on: DispatchQueue.main)
+        .sink { [weak self] domain, userID in
+            guard let self = self else { return }
+            let predicates = [SearchHistory.predicate(domain: domain ?? "", userID: userID ?? "")]
+            self.fetchedResultsController.fetchRequest.predicate = NSCompoundPredicate(andPredicateWithSubpredicates: predicates)
+            do {
+                try self.fetchedResultsController.performFetch()
+            } catch {
+                assertionFailure(error.localizedDescription)
+            }
+        }
+        .store(in: &disposeBag)
     }
 
 }
diff --git a/Mastodon/Scene/Search/SearchDetail/SearchHistory/SearchHistoryViewModel.swift b/Mastodon/Scene/Search/SearchDetail/SearchHistory/SearchHistoryViewModel.swift
index d3d41e90..934c55b1 100644
--- a/Mastodon/Scene/Search/SearchDetail/SearchHistory/SearchHistoryViewModel.swift
+++ b/Mastodon/Scene/Search/SearchDetail/SearchHistory/SearchHistoryViewModel.swift
@@ -25,6 +25,15 @@ final class SearchHistoryViewModel {
         self.context = context
         self.searchHistoryFetchedResultController = SearchHistoryFetchedResultController(managedObjectContext: context.managedObjectContext)
 
+        context.authenticationService.activeMastodonAuthenticationBox
+            .receive(on: DispatchQueue.main)
+            .sink { [weak self] box in
+                guard let self = self else { return }
+                self.searchHistoryFetchedResultController.domain.value = box?.domain
+                self.searchHistoryFetchedResultController.userID.value = box?.userID
+            }
+            .store(in: &disposeBag)
+
         // may block main queue by large dataset
         searchHistoryFetchedResultController.objectIDs
             .removeDuplicates()