Merge pull request #213 from tootsuite/feature/filter

Add timeline status filter

Localization/app.json

@@ -169,6 +169,7 @@
                 "edit_info": "Edit Info"
             },
             "timeline": {
+                "filtered": "Filtered",
                 "timestamp": {
                     "now": "Now",
                     "time_ago": "%s ago"

Mastodon.xcodeproj/project.pbxproj

@@ -410,6 +410,7 @@
 		DB9D6C2425E502C60051B173 /* MosaicImageViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = DB9D6C2225E502C60051B173 /* MosaicImageViewModel.swift */; };
 		DB9D6C2E25E504AC0051B173 /* Attachment.swift in Sources */ = {isa = PBXBuildFile; fileRef = DB9D6C2D25E504AC0051B173 /* Attachment.swift */; };
 		DB9D6C3825E508BE0051B173 /* Attachment.swift in Sources */ = {isa = PBXBuildFile; fileRef = DB9D6C3725E508BE0051B173 /* Attachment.swift */; };
+		DB9D7C21269824B80054B3DF /* APIService+Filter.swift in Sources */ = {isa = PBXBuildFile; fileRef = DB9D7C20269824B80054B3DF /* APIService+Filter.swift */; };
 		DB9E0D6F25EE008500CFDD76 /* UIInterpolatingMotionEffect.swift in Sources */ = {isa = PBXBuildFile; fileRef = DB9E0D6E25EE008500CFDD76 /* UIInterpolatingMotionEffect.swift */; };
 		DBA088DF26958164003EB4B2 /* UserFetchedResultsController.swift in Sources */ = {isa = PBXBuildFile; fileRef = DBA088DE26958164003EB4B2 /* UserFetchedResultsController.swift */; };
 		DBA0A10925FB3C2B0079C110 /* RoundedEdgesButton.swift in Sources */ = {isa = PBXBuildFile; fileRef = DBA0A10825FB3C2B0079C110 /* RoundedEdgesButton.swift */; };
@@ -1041,6 +1042,7 @@
 		DB9D6C2225E502C60051B173 /* MosaicImageViewModel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MosaicImageViewModel.swift; sourceTree = "<group>"; };
 		DB9D6C2D25E504AC0051B173 /* Attachment.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Attachment.swift; sourceTree = "<group>"; };
 		DB9D6C3725E508BE0051B173 /* Attachment.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Attachment.swift; sourceTree = "<group>"; };
+		DB9D7C20269824B80054B3DF /* APIService+Filter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "APIService+Filter.swift"; sourceTree = "<group>"; };
 		DB9E0D6E25EE008500CFDD76 /* UIInterpolatingMotionEffect.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UIInterpolatingMotionEffect.swift; sourceTree = "<group>"; };
 		DBA088DE26958164003EB4B2 /* UserFetchedResultsController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserFetchedResultsController.swift; sourceTree = "<group>"; };
 		DBA0A10825FB3C2B0079C110 /* RoundedEdgesButton.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RoundedEdgesButton.swift; sourceTree = "<group>"; };
@@ -1957,6 +1959,7 @@
 				DBAE3F8D2616E0B1004B8251 /* APIService+Block.swift */,
 				DBAE3F9D2616E308004B8251 /* APIService+Mute.swift */,
 				5B90C48426259BF10002E742 /* APIService+Subscriptions.swift */,
+				DB9D7C20269824B80054B3DF /* APIService+Filter.swift */,
 			);
 			path = APIService;
 			sourceTree = "<group>";
@@ -3345,6 +3348,7 @@
 				DBA9443A265CC0FC00C537E1 /* Fields.swift in Sources */,
 				2DE0FAC12615F04D00CDF649 /* RecommendHashTagSection.swift in Sources */,
 				DBA5E7A5263BD28C004598BB /* ContextMenuImagePreviewViewModel.swift in Sources */,
+				DB9D7C21269824B80054B3DF /* APIService+Filter.swift in Sources */,
 				2D38F1E525CD46C100561493 /* HomeTimelineViewModel.swift in Sources */,
 				DBCBCC012680AF2A000F5B51 /* AsyncHomeTimelineViewModel+Diffable.swift in Sources */,
 				DBCC3B36261440BA0045B23D /* UINavigationController.swift in Sources */,

Mastodon.xcodeproj/xcuserdata/mainasuk.xcuserdatad/xcschemes/xcschememanagement.plist

@@ -12,7 +12,7 @@
 		<key>CoreDataStack.xcscheme_^#shared#^_</key>
 		<dict>
 			<key>orderHint</key>
-			<integer>21</integer>
+			<integer>20</integer>
 		</dict>
 		<key>Mastodon - ASDK.xcscheme_^#shared#^_</key>
 		<dict>
@@ -37,7 +37,7 @@
 		<key>NotificationService.xcscheme_^#shared#^_</key>
 		<dict>
 			<key>orderHint</key>
-			<integer>20</integer>
+			<integer>21</integer>
 		</dict>
 	</dict>
 	<key>SuppressBuildableAutocreation</key>

Mastodon/Diffiable/Section/NotificationSection.swift

@@ -97,6 +97,7 @@ extension NotificationSection {
                     StatusSection.configure(
                         cell: cell,
                         tableView: tableView,
+                        timelineContext: .notifications,
                         dependency: dependency,
                         readableLayoutFrame: frame,
                         status: status,

Mastodon/Diffiable/Section/ReportSection.swift

@@ -42,6 +42,7 @@ extension ReportSection {
                     StatusSection.configure(
                         cell: cell,
                         tableView: tableView,
+                        timelineContext: .report,
                         dependency: dependency,
                         readableLayoutFrame: tableView.readableContentGuide.layoutFrame,
                         status: status,

Mastodon/Diffiable/Section/StatusSection.swift

@@ -13,6 +13,8 @@ import UIKit
 import AVKit
 import AlamofireImage
 import MastodonMeta
+import MastodonSDK
+import NaturalLanguage
 
 // import LinkPresentation
 
@@ -22,6 +24,7 @@ import AsyncDisplayKit
 
 protocol StatusCell: DisposeBagCollectable {
     var statusView: StatusView { get }
+    var isFiltered: Bool { get set }
 }
 
 enum StatusSection: Equatable, Hashable {
@@ -59,6 +62,7 @@ extension StatusSection {
 
     static func tableViewDiffableDataSource(
         for tableView: UITableView,
+        timelineContext: TimelineContext,
         dependency: NeedsDependency,
         managedObjectContext: NSManagedObjectContext,
         timestampUpdatePublisher: AnyPublisher<Date, Never>,
@@ -91,6 +95,7 @@ extension StatusSection {
                 configureStatusTableViewCell(
                     cell: cell,
                     tableView: tableView,
+                    timelineContext: timelineContext,
                     dependency: dependency,
                     readableLayoutFrame: tableView.readableContentGuide.layoutFrame,
                     status: status,
@@ -128,6 +133,7 @@ extension StatusSection {
                     StatusSection.configure(
                         cell: cell,
                         tableView: tableView,
+                        timelineContext: timelineContext,
                         dependency: dependency,
                         readableLayoutFrame: tableView.readableContentGuide.layoutFrame,
                         status: status,
@@ -210,11 +216,99 @@ extension StatusSection {
     }
 }
 
+extension StatusSection {
+
+    enum TimelineContext {
+        case home
+        case notifications
+        case `public`
+        case thread
+        case account
+
+        case favorite
+        case hashtag
+        case report
+
+        var filterContext: Mastodon.Entity.Filter.Context? {
+            switch self {
+            case .home:             return .home
+            case .notifications:    return .notifications
+            case .public:           return .public
+            case .thread:           return .thread
+            case .account:          return .account
+            default:                return nil
+            }
+        }
+    }
+
+    private static func needsFilterStatus(
+        content: MastodonMetaContent?,
+        filters: [Mastodon.Entity.Filter],
+        timelineContext: TimelineContext
+    ) -> AnyPublisher<Bool, Never> {
+        guard let content = content,
+              let currentFilterContext = timelineContext.filterContext else {
+            return Just(false).eraseToAnyPublisher()
+        }
+
+        return Future<Bool, Never> { promise in
+            DispatchQueue.global(qos: .userInteractive).async {
+                var wordFilters: [Mastodon.Entity.Filter] = []
+                var nonWordFilters: [Mastodon.Entity.Filter] = []
+                for filter in filters {
+                    guard filter.context.contains(where: { $0 == currentFilterContext }) else { continue }
+                    if filter.wholeWord {
+                        wordFilters.append(filter)
+                    } else {
+                        nonWordFilters.append(filter)
+                    }
+                }
+
+                let text = content.original.lowercased()
+
+                var needsFilter = false
+                for filter in nonWordFilters {
+                    guard text.contains(filter.phrase.lowercased()) else { continue }
+                    needsFilter = true
+                    break
+                }
+
+                if needsFilter {
+                    DispatchQueue.main.async {
+                        promise(.success(true))
+                    }
+                    return
+                }
+
+                let tokenizer = NLTokenizer(unit: .word)
+                tokenizer.string = text
+                let phraseWords = wordFilters.map { $0.phrase.lowercased() }
+                tokenizer.enumerateTokens(in: text.startIndex..<text.endIndex) { range, _ in
+                    let word = String(text[range])
+                    if phraseWords.contains(word) {
+                        needsFilter = true
+                        return false
+                    } else {
+                        return true
+                    }
+                }
+
+                DispatchQueue.main.async {
+                    promise(.success(needsFilter))
+                }
+            }
+        }
+        .eraseToAnyPublisher()
+    }
+
+}
+
 extension StatusSection {
 
     static func configureStatusTableViewCell(
         cell: StatusTableViewCell,
         tableView: UITableView,
+        timelineContext: TimelineContext,
         dependency: NeedsDependency,
         readableLayoutFrame: CGRect?,
         status: Status,
@@ -224,6 +318,7 @@ extension StatusSection {
         configure(
             cell: cell,
             tableView: tableView,
+            timelineContext: timelineContext,
             dependency: dependency,
             readableLayoutFrame: readableLayoutFrame,
             status: status,
@@ -235,6 +330,7 @@ extension StatusSection {
     static func configure(
         cell: StatusCell,
         tableView: UITableView,
+        timelineContext: TimelineContext,
         dependency: NeedsDependency,
         readableLayoutFrame: CGRect?,
         status: Status,
@@ -255,6 +351,32 @@ extension StatusSection {
             }
             .store(in: &cell.disposeBag)
 
+        let document = MastodonContent(
+            content: (status.reblog ?? status).content,
+            emojis: (status.reblog ?? status).emojiMeta
+        )
+        let content = try? MastodonMetaContent.convert(document: document)
+        
+        if status.author.id == requestUserID || status.reblog?.author.id == requestUserID {
+            // do not filter myself
+        } else {
+            let needsFilter = StatusSection.needsFilterStatus(
+                content: content,
+                filters: AppContext.shared.authenticationService.activeFilters.value,
+                timelineContext: timelineContext
+            )
+            needsFilter
+                .receive(on: DispatchQueue.main)
+                .sink { [weak cell] needsFilter in
+                    guard let cell = cell else { return }
+                    cell.isFiltered = needsFilter
+                    if needsFilter {
+                        os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: filter out status: %s", ((#file as NSString).lastPathComponent), #line, #function, content?.original ?? "<nil>")
+                    }
+                }
+                .store(in: &cell.disposeBag)
+        }
+        
         // set header
         StatusSection.configureStatusViewHeader(cell: cell, status: status)
         // set author: name + username + avatar
@@ -275,6 +397,7 @@ extension StatusSection {
         StatusSection.configureStatusContent(
             cell: cell,
             status: status,
+            content: content,
             readableLayoutFrame: readableLayoutFrame,
             statusItemAttribute: statusItemAttribute
         )
@@ -558,20 +681,15 @@ extension StatusSection {
     static func configureStatusContent(
         cell: StatusCell,
         status: Status,
+        content: MastodonMetaContent?,
         readableLayoutFrame: CGRect?,
         statusItemAttribute: Item.StatusAttribute
     ) {
         // set content
-        do {
+        if let content = content {
-            let status = status.reblog ?? status
+            cell.statusView.contentMetaText.configure(content: content)
-            let content = MastodonContent(
+            cell.statusView.contentMetaText.textView.accessibilityLabel = content.trimmed
-                content: status.content,
+        } else {
-                emojis: status.emojiMeta
-            )
-            let metaContent = try MastodonMetaContent.convert(document: content)
-            cell.statusView.contentMetaText.configure(content: metaContent)
-            cell.statusView.contentMetaText.textView.accessibilityLabel = metaContent.trimmed
-        } catch {
             cell.statusView.contentMetaText.textView.text = " "
             cell.statusView.contentMetaText.textView.accessibilityLabel = ""
             assertionFailure()

Mastodon/Generated/Assets.swift

@@ -24,6 +24,7 @@ internal enum Asset {
   internal static let accentColor = ColorAsset(name: "AccentColor")
   internal enum Asset {
     internal static let email = ImageAsset(name: "Asset/email")
+    internal static let friends = ImageAsset(name: "Asset/friends")
     internal static let mastodonTextLogo = ImageAsset(name: "Asset/mastodon.text.logo")
   }
   internal enum Circles {

Mastodon/Generated/Strings.swift

@@ -328,6 +328,8 @@ internal enum L10n {
         internal static let search = L10n.tr("Localizable", "Common.Controls.Tabs.Search")
       }
       internal enum Timeline {
+        /// Filtered
+        internal static let filtered = L10n.tr("Localizable", "Common.Controls.Timeline.Filtered")
         internal enum Accessibility {
           /// %@ favorites
           internal static func countFavorites(_ p1: Any) -> String {

Mastodon/Resources/Assets.xcassets/Asset/friends.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "friends 3.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "friends 2.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "friends 1.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Mastodon/Resources/ar.lproj/Localizable.strings

@@ -119,6 +119,7 @@ Please check your internet connection.";
 "Common.Controls.Timeline.Accessibility.CountFavorites" = "%@ favorites";
 "Common.Controls.Timeline.Accessibility.CountReblogs" = "%@ reblogs";
 "Common.Controls.Timeline.Accessibility.CountReplies" = "%@ replies";
+"Common.Controls.Timeline.Filtered" = "Filtered";
 "Common.Controls.Timeline.Header.BlockedWarning" = "You can’t view this’s profile
  until they unblock you.";
 "Common.Controls.Timeline.Header.BlockingWarning" = "You can’t view this profile

Mastodon/Resources/en.lproj/Localizable.strings

@@ -119,6 +119,7 @@ Please check your internet connection.";
 "Common.Controls.Timeline.Accessibility.CountFavorites" = "%@ favorites";
 "Common.Controls.Timeline.Accessibility.CountReblogs" = "%@ reblogs";
 "Common.Controls.Timeline.Accessibility.CountReplies" = "%@ replies";
+"Common.Controls.Timeline.Filtered" = "Filtered";
 "Common.Controls.Timeline.Header.BlockedWarning" = "You can’t view this’s profile
  until they unblock you.";
 "Common.Controls.Timeline.Header.BlockingWarning" = "You can’t view this profile

Mastodon/Scene/HashtagTimeline/HashtagTimelineViewModel+Diffable.swift

@@ -24,6 +24,7 @@ extension HashtagTimelineViewModel {
         
         diffableDataSource = StatusSection.tableViewDiffableDataSource(
             for: tableView,
+            timelineContext: .hashtag,
             dependency: dependency,
             managedObjectContext: context.managedObjectContext,
             timestampUpdatePublisher: timestampUpdatePublisher,

Mastodon/Scene/HomeTimeline/HomeTimelineViewController.swift

@@ -25,11 +25,17 @@ final class HomeTimelineViewController: UIViewController, NeedsDependency, Media
     
     let mediaPreviewTransitionController = MediaPreviewTransitionController()
 
+    let friendsAssetImageView: UIImageView = {
+        let imageView = UIImageView()
+        imageView.image = Asset.Asset.friends.image
+        imageView.contentMode = .scaleAspectFill
+        return imageView
+    }()
+    
     lazy var emptyView: UIStackView = {
         let emptyView = UIStackView()
         emptyView.axis = .vertical
         emptyView.distribution = .fill
-        emptyView.layoutMargins = UIEdgeInsets(top: 0, left: 20, bottom: 54, right: 20)
         emptyView.isLayoutMarginsRelativeArrangement = true
         return emptyView
     }()
@@ -246,9 +252,10 @@ extension HomeTimelineViewController {
         view.addSubview(emptyView)
         emptyView.translatesAutoresizingMaskIntoConstraints = false
         NSLayoutConstraint.activate([
-            emptyView.leadingAnchor.constraint(equalTo: view.readableContentGuide.leadingAnchor),
+            emptyView.topAnchor.constraint(equalTo: view.layoutMarginsGuide.topAnchor),
-            emptyView.trailingAnchor.constraint(equalTo: view.readableContentGuide.trailingAnchor),
+            emptyView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
-            emptyView.bottomAnchor.constraint(equalTo: view.readableContentGuide.bottomAnchor)
+            emptyView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
+            emptyView.bottomAnchor.constraint(equalTo: view.layoutMarginsGuide.bottomAnchor)
         ])
         
         if emptyView.arrangedSubviews.count > 0 {
@@ -273,10 +280,28 @@ extension HomeTimelineViewController {
             return button
         }()
 
-        emptyView.addArrangedSubview(findPeopleButton)
+        let topPaddingView = UIView()
-        emptyView.setCustomSpacing(17, after: findPeopleButton)
+        let bottomPaddingView = UIView()
-        emptyView.addArrangedSubview(manuallySearchButton)
 
+        emptyView.addArrangedSubview(topPaddingView)
+        emptyView.addArrangedSubview(friendsAssetImageView)
+        emptyView.addArrangedSubview(bottomPaddingView)
+
+        topPaddingView.translatesAutoresizingMaskIntoConstraints = false
+        bottomPaddingView.translatesAutoresizingMaskIntoConstraints = false
+        NSLayoutConstraint.activate([
+            topPaddingView.heightAnchor.constraint(equalTo: bottomPaddingView.heightAnchor, multiplier: 0.8),
+        ])
+
+        let buttonContainerStackView = UIStackView()
+        emptyView.addArrangedSubview(buttonContainerStackView)
+        buttonContainerStackView.isLayoutMarginsRelativeArrangement = true
+        buttonContainerStackView.layoutMargins = UIEdgeInsets(top: 0, left: 32, bottom: 22, right: 32)
+        buttonContainerStackView.axis = .vertical
+        buttonContainerStackView.spacing = 17
+
+        buttonContainerStackView.addArrangedSubview(findPeopleButton)
+        buttonContainerStackView.addArrangedSubview(manuallySearchButton)
     }
 }
 

Mastodon/Scene/HomeTimeline/HomeTimelineViewModel+Diffable.swift

@@ -25,6 +25,7 @@ extension HomeTimelineViewModel {
         
         diffableDataSource = StatusSection.tableViewDiffableDataSource(
             for: tableView,
+            timelineContext: .home,
             dependency: dependency,
             managedObjectContext: fetchedResultsController.managedObjectContext,
             timestampUpdatePublisher: timestampUpdatePublisher,
@@ -33,13 +34,10 @@ extension HomeTimelineViewModel {
             threadReplyLoaderTableViewCellDelegate: nil
         )
 
+        // make initial snapshot animation smooth
         var snapshot = NSDiffableDataSourceSnapshot<StatusSection, Item>()
         snapshot.appendSections([.main])
         diffableDataSource?.apply(snapshot)
-
-        // workaround to append loader wrong animation issue
-        snapshot.appendItems([.bottomLoader], toSection: .main)
-        diffableDataSource?.apply(snapshot)
     }
     
 }

Mastodon/Scene/Notification/NotificationViewController.swift

@@ -148,8 +148,10 @@ extension NotificationViewController {
 
         tableView.deselectRow(with: transitionCoordinator, animated: animated)
         
-        // fetch latest notification when will appear
+        // fetch latest notification when scroll position is within half screen height to prevent list reload
+        if tableView.contentOffset.y < view.frame.height * 0.5 {
             viewModel.loadLatestStateMachine.enter(NotificationViewModel.LoadLatestState.Loading.self)
+        }
 
         
         // needs trigger manually after onboarding dismiss

Mastodon/Scene/Notification/TableViewCell/NotificationStatusTableViewCell.swift

@@ -131,8 +131,23 @@ final class NotificationStatusTableViewCell: UITableViewCell, StatusCell {
     var separatorLineToMarginLeadingLayoutConstraint: NSLayoutConstraint!
     var separatorLineToMarginTrailingLayoutConstraint: NSLayoutConstraint!
 
+    var isFiltered: Bool = false {
+        didSet {
+            configure(isFiltered: isFiltered)
+        }
+    }
+
+    let filteredLabel: UILabel = {
+        let label = UILabel()
+        label.textColor = Asset.Colors.Label.secondary.color
+        label.text = L10n.Common.Controls.Timeline.filtered
+        label.font = .preferredFont(forTextStyle: .body)
+        return label
+    }()
+    
     override func prepareForReuse() {
         super.prepareForReuse()
+        isFiltered = false
         avatarImageViewTask?.cancel()
         avatarImageViewTask = nil
         statusView.updateContentWarningDisplay(isHidden: true, animated: false)
@@ -263,6 +278,14 @@ extension NotificationStatusTableViewCell {
             separatorLine.heightAnchor.constraint(equalToConstant: UIView.separatorLineHeight(of: contentView)),
         ])
 
+        filteredLabel.translatesAutoresizingMaskIntoConstraints = false
+        addSubview(filteredLabel)
+        NSLayoutConstraint.activate([
+            filteredLabel.centerXAnchor.constraint(equalTo: statusContainerView.centerXAnchor),
+            filteredLabel.centerYAnchor.constraint(equalTo: statusContainerView.centerYAnchor),
+        ])
+        filteredLabel.isHidden = true
+
         statusView.delegate = self
 
         let avatarImageViewTapGestureRecognizer = UITapGestureRecognizer.singleTapGestureRecognizer
@@ -283,6 +306,12 @@ extension NotificationStatusTableViewCell {
         statusContainerView.layer.borderColor = Asset.Colors.Border.notificationStatus.color.cgColor
     }
 
+    private func configure(isFiltered: Bool) {
+        statusView.alpha = isFiltered ? 0 : 1
+        filteredLabel.isHidden = !isFiltered
+        isUserInteractionEnabled = !isFiltered
+    }
+
 }
 
 extension NotificationStatusTableViewCell {

Mastodon/Scene/Profile/Favorite/FavoriteViewModel+Diffable.swift

@@ -21,6 +21,7 @@ extension FavoriteViewModel {
         
         diffableDataSource = StatusSection.tableViewDiffableDataSource(
             for: tableView,
+            timelineContext: .favorite,
             dependency: dependency,
             managedObjectContext: statusFetchedResultsController.fetchedResultsController.managedObjectContext,
             timestampUpdatePublisher: timestampUpdatePublisher,

Mastodon/Scene/Profile/Timeline/UserTimelineViewModel+Diffable.swift

@@ -21,6 +21,7 @@ extension UserTimelineViewModel {
         
         diffableDataSource = StatusSection.tableViewDiffableDataSource(
             for: tableView,
+            timelineContext: .account,
             dependency: dependency,
             managedObjectContext: statusFetchedResultsController.fetchedResultsController.managedObjectContext,
             timestampUpdatePublisher: timestampUpdatePublisher,

Mastodon/Scene/PublicTimeline/PublicTimelineViewModel+Diffable.swift

@@ -24,6 +24,7 @@ extension PublicTimelineViewModel {
 
         diffableDataSource = StatusSection.tableViewDiffableDataSource(
             for: tableView,
+            timelineContext: .public,
             dependency: dependency,
             managedObjectContext: fetchedResultsController.managedObjectContext,
             timestampUpdatePublisher: timestampUpdatePublisher,

Mastodon/Scene/Report/ReportedStatusTableviewCell.swift

@@ -41,6 +41,9 @@ final class ReportedStatusTableViewCell: UITableViewCell, StatusCell {
     var separatorLineToMarginLeadingLayoutConstraint: NSLayoutConstraint!
     var separatorLineToMarginTrailingLayoutConstraint: NSLayoutConstraint!
 
+    // not support filter
+    var isFiltered: Bool = false
+
     override func prepareForReuse() {
         super.prepareForReuse()
         statusView.updateContentWarningDisplay(isHidden: true, animated: false)

Mastodon/Scene/Share/View/Content/StatusView.swift

@@ -479,9 +479,6 @@ extension StatusView {
         avatarStackedContainerButton.addTarget(self, action: #selector(StatusView.avatarStackedContainerButtonDidPressed(_:)), for: .touchUpInside)
         revealContentWarningButton.addTarget(self, action: #selector(StatusView.revealContentWarningButtonDidPressed(_:)), for: .touchUpInside)
         pollVoteButton.addTarget(self, action: #selector(StatusView.pollVoteButtonPressed(_:)), for: .touchUpInside)
-
-
-
     }
     
 }

Mastodon/Scene/Share/View/TableviewCell/StatusTableViewCell.swift

@@ -71,9 +71,24 @@ final class StatusTableViewCell: UITableViewCell, StatusCell {
     var separatorLineToMarginLeadingLayoutConstraint: NSLayoutConstraint!
     var separatorLineToMarginTrailingLayoutConstraint: NSLayoutConstraint!
 
+    var isFiltered: Bool = false {
+        didSet {
+            configure(isFiltered: isFiltered)
+        }
+    }
+
+    let filteredLabel: UILabel = {
+        let label = UILabel()
+        label.textColor = Asset.Colors.Label.secondary.color
+        label.text = L10n.Common.Controls.Timeline.filtered
+        label.font = .preferredFont(forTextStyle: .body)
+        return label
+    }()
+
     override func prepareForReuse() {
         super.prepareForReuse()
         selectionStyle = .default
+        isFiltered = false
         statusView.statusMosaicImageViewContainer.resetImageTask()
         statusView.contentMetaText.textView.isSelectable = false
         statusView.updateContentWarningDisplay(isHidden: true, animated: false)
@@ -133,6 +148,14 @@ extension StatusTableViewCell {
         ])
         resetSeparatorLineLayout()
 
+        filteredLabel.translatesAutoresizingMaskIntoConstraints = false
+        addSubview(filteredLabel)
+        NSLayoutConstraint.activate([
+            filteredLabel.centerXAnchor.constraint(equalTo: centerXAnchor),
+            filteredLabel.centerYAnchor.constraint(equalTo: centerYAnchor),
+        ])
+        filteredLabel.isHidden = true
+
         statusView.delegate = self
         statusView.pollTableView.delegate = self
         statusView.statusMosaicImageViewContainer.delegate = self
@@ -148,6 +171,12 @@ extension StatusTableViewCell {
         resetSeparatorLineLayout()
     }
 
+    private func configure(isFiltered: Bool) {
+        statusView.alpha = isFiltered ? 0 : 1
+        threadMetaView.alpha = isFiltered ? 0 : 1
+        filteredLabel.isHidden = !isFiltered
+        isUserInteractionEnabled = !isFiltered
+    }
     
 }
 

Mastodon/Scene/Thread/ThreadViewModel+Diffable.swift

@@ -26,6 +26,7 @@ extension ThreadViewModel {
         
         diffableDataSource = StatusSection.tableViewDiffableDataSource(
             for: tableView,
+            timelineContext: .thread,
             dependency: dependency,
             managedObjectContext: context.managedObjectContext,
             timestampUpdatePublisher: timestampUpdatePublisher,

Mastodon/Service/APIService/APIService+Filter.swift

@@ -0,0 +1,25 @@
+//
+//  APIService+Filter.swift
+//  Mastodon
+//
+//  Created by MainasuK Cirno on 2021-7-9.
+//
+
+import os.log
+import Combine
+import CoreData
+import CoreDataStack
+import Foundation
+import MastodonSDK
+
+extension APIService {
+
+    func filters(
+        mastodonAuthenticationBox: AuthenticationService.MastodonAuthenticationBox
+    ) -> AnyPublisher<Mastodon.Response.Content<[Mastodon.Entity.Filter]>, Error> {
+        let authorization = mastodonAuthenticationBox.userAuthorization
+        let domain = mastodonAuthenticationBox.domain
+
+        return Mastodon.API.Account.filters(session: session, domain: domain, authorization: authorization)
+    }
+}

Mastodon/Service/AuthenticationService.swift

@@ -27,6 +27,7 @@ final class AuthenticationService: NSObject {
     let mastodonAuthenticationBoxes = CurrentValueSubject<[AuthenticationService.MastodonAuthenticationBox], Never>([])
     let activeMastodonAuthentication = CurrentValueSubject<MastodonAuthentication?, Never>(nil)
     let activeMastodonAuthenticationBox = CurrentValueSubject<AuthenticationService.MastodonAuthenticationBox?, Never>(nil)
+    let activeFilters = CurrentValueSubject<[Mastodon.Entity.Filter], Never>([])
 
     init(
         managedObjectContext: NSManagedObjectContext,
@@ -87,6 +88,53 @@ final class AuthenticationService: NSObject {
         } catch {
             assertionFailure(error.localizedDescription)
         }
+
+        // fetch account filters every 60s and filter out expired items
+        let filterUpdateTimerPublisher = Timer.publish(every: 60.0, on: .main, in: .common)
+            .autoconnect()
+            .share()
+            .eraseToAnyPublisher()
+        let filterUpdatePublisher = PassthroughSubject<Void, Never>()
+
+        filterUpdateTimerPublisher
+            .map { _ in }
+            .subscribe(filterUpdatePublisher)
+            .store(in: &disposeBag)
+
+        Publishers.CombineLatest(
+            activeMastodonAuthenticationBox,
+            filterUpdatePublisher
+        )
+        .flatMap { box, _ -> AnyPublisher<Result<Mastodon.Response.Content<[Mastodon.Entity.Filter]>, Error>, Never> in
+            guard let box = box else {
+                return Just(Result { throw APIService.APIError.implicit(.authenticationMissing) }).eraseToAnyPublisher()
+            }
+            return apiService.filters(mastodonAuthenticationBox: box)
+                .map { response in
+                    let now = Date()
+                    let newResponse = response.map { filters in
+                        return filters.filter { $0.expiresAt > now }
+                    }
+                    return Result<Mastodon.Response.Content<[Mastodon.Entity.Filter]>, Error>.success(newResponse)
+                }
+                .catch { error in
+                    Just(Result<Mastodon.Response.Content<[Mastodon.Entity.Filter]>, Error>.failure(error))
+                }
+                .eraseToAnyPublisher()
+        }
+        .sink { result in
+            switch result {
+            case .success(let response):
+                os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: fetch account filters success. %ld items", ((#file as NSString).lastPathComponent), #line, #function, response.value.count)
+                self.activeFilters.value = response.value
+            case .failure(let error):
+                os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: fetch account filters fail: %s", ((#file as NSString).lastPathComponent), #line, #function, error.localizedDescription)
+
+                break
+            }
+        }
+        .store(in: &disposeBag)
+        filterUpdatePublisher.send()
     }
 
 }

MastodonSDK/Sources/MastodonSDK/API/Mastodon+API+Account+Filter.swift

@@ -0,0 +1,52 @@
+//
+//  Mastodon+API+Account+Filter.swift
+//  
+//
+//  Created by MainasuK Cirno on 2021-7-9.
+//
+
+import Foundation
+import Combine
+
+// MARK: - Account credentials
+extension Mastodon.API.Account {
+
+    static func filtersEndpointURL(domain: String) -> URL {
+        return Mastodon.API.endpointURL(domain: domain).appendingPathComponent("filters")
+    }
+
+    /// View all filters
+    ///
+    /// Creates a user and account records.
+    ///
+    /// - Since: 2.4.3
+    /// - Version: 3.3.1
+    /// # Last Update
+    ///   2021/7/9
+    /// # Reference
+    ///   [Document](https://docs.joinmastodon.org/methods/accounts/filters/)
+    /// - Parameters:
+    ///   - session: `URLSession`
+    ///   - domain: Mastodon instance domain. e.g. "example.com"
+    ///   - authorization: User token
+    /// - Returns: `AnyPublisher` contains `[Filter]` nested in the response
+    public static func filters(
+        session: URLSession,
+        domain: String,
+        authorization: Mastodon.API.OAuth.Authorization
+    ) -> AnyPublisher<Mastodon.Response.Content<[Mastodon.Entity.Filter]>, Error> {
+        let request = Mastodon.API.get(
+            url: filtersEndpointURL(domain: domain),
+            query: nil,
+            authorization: authorization
+        )
+
+        return session.dataTaskPublisher(for: request)
+            .tryMap { data, response in
+                let value = try Mastodon.API.decode(type: [Mastodon.Entity.Filter].self, from: data, response: response)
+                return Mastodon.Response.Content(value: value, response: response)
+            }
+            .eraseToAnyPublisher()
+    }
+
+}

MastodonSDK/Sources/MastodonSDK/Entity/Mastodon+Entity+Filter.swift

@@ -43,6 +43,7 @@ extension Mastodon.Entity.Filter {
         case notifications
         case `public`
         case thread
+        case account
         
         case _other(String)
         
@@ -52,6 +53,7 @@ extension Mastodon.Entity.Filter {
             case "notifications":       self = .notifications
             case "public":              self = .`public`
             case "thread":              self = .thread
+            case "account":             self = .account
             default:                    self = ._other(rawValue)
             }
         }
@@ -62,6 +64,7 @@ extension Mastodon.Entity.Filter {
             case .notifications:            return "notifications"
             case .public:                   return "public"
             case .thread:                   return "thread"
+            case .account:                  return "account"
             case ._other(let value):        return value
             }
         }