Add local saved hashtags

Closes #66

Pachyderm/Model/Hashtag.swift

@@ -8,7 +8,7 @@
 
 import Foundation
 
-public class Hashtag: Decodable {
+public class Hashtag: Codable {
     public let name: String
     public let url: URL
     public let history: [History]?
@@ -27,7 +27,7 @@ public class Hashtag: Decodable {
 }
 
 extension Hashtag {
-    public class History: Decodable {
+    public class History: Codable {
         public let day: Date
         public let uses: Int
         public let accounts: Int
@@ -42,7 +42,7 @@ extension Hashtag {
 
 extension Hashtag: Equatable, Hashable {
     public static func ==(lhs: Hashtag, rhs: Hashtag) -> Bool {
-        return lhs.url == rhs.url
+        return lhs.name == rhs.name
     }
     
     public func hash(into hasher: inout Hasher) {

Tusker.xcodeproj/project.pbxproj

@@ -164,6 +164,9 @@
 		D68632AB21ED8319008C716E /* GMImagePickerController.h in Headers */ = {isa = PBXBuildFile; fileRef = D686329121ED8319008C716E /* GMImagePickerController.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		D68632AC21ED8319008C716E /* GMImagePicker.strings in Resources */ = {isa = PBXBuildFile; fileRef = D686329321ED8319008C716E /* GMImagePicker.strings */; };
 		D68FEC4F232C5BC300C84F23 /* SegmentedPageViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D68FEC4E232C5BC300C84F23 /* SegmentedPageViewController.swift */; };
+		D6945C2F23AC47C3005C403C /* SavedHashtagsManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C2E23AC47C3005C403C /* SavedHashtagsManager.swift */; };
+		D6945C3223AC4D36005C403C /* HashtagTimelineViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C3123AC4D36005C403C /* HashtagTimelineViewController.swift */; };
+		D6945C3423AC6431005C403C /* AddSavedHashtagViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C3323AC6431005C403C /* AddSavedHashtagViewController.swift */; };
 		D6A3BC7723218E1300FD64D5 /* TimelineSegment.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6A3BC7323218C6E00FD64D5 /* TimelineSegment.swift */; };
 		D6A3BC7923218E9200FD64D5 /* NotificationGroup.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6A3BC7823218E9200FD64D5 /* NotificationGroup.swift */; };
 		D6A3BC7C232195C600FD64D5 /* ActionNotificationGroupTableViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6A3BC7A232195C600FD64D5 /* ActionNotificationGroupTableViewCell.swift */; };
@@ -435,6 +438,9 @@
 		D686329121ED8319008C716E /* GMImagePickerController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = GMImagePickerController.h; sourceTree = "<group>"; };
 		D686329421ED8319008C716E /* de */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = de; path = GMImagePicker.strings; sourceTree = "<group>"; };
 		D68FEC4E232C5BC300C84F23 /* SegmentedPageViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SegmentedPageViewController.swift; sourceTree = "<group>"; };
+		D6945C2E23AC47C3005C403C /* SavedHashtagsManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SavedHashtagsManager.swift; sourceTree = "<group>"; };
+		D6945C3123AC4D36005C403C /* HashtagTimelineViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HashtagTimelineViewController.swift; sourceTree = "<group>"; };
+		D6945C3323AC6431005C403C /* AddSavedHashtagViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AddSavedHashtagViewController.swift; sourceTree = "<group>"; };
 		D6A3BC7323218C6E00FD64D5 /* TimelineSegment.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelineSegment.swift; sourceTree = "<group>"; };
 		D6A3BC7823218E9200FD64D5 /* NotificationGroup.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationGroup.swift; sourceTree = "<group>"; };
 		D6A3BC7A232195C600FD64D5 /* ActionNotificationGroupTableViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ActionNotificationGroupTableViewCell.swift; sourceTree = "<group>"; };
@@ -731,6 +737,7 @@
 			isa = PBXGroup;
 			children = (
 				D627943D23A564D400D38C68 /* ExploreViewController.swift */,
+				D6945C3323AC6431005C403C /* AddSavedHashtagViewController.swift */,
 			);
 			path = Explore;
 			sourceTree = "<group>";
@@ -781,6 +788,7 @@
 				D641C782213DD7F0004B4513 /* Main */,
 				D641C783213DD7FE004B4513 /* Onboarding */,
 				D641C781213DD7DD004B4513 /* Timeline */,
+				D6945C3023AC4D21005C403C /* Hashtag Timeline */,
 				D641C784213DD819004B4513 /* Profile */,
 				D641C785213DD83B004B4513 /* Conversation */,
 				D641C786213DD852004B4513 /* Notifications */,
@@ -1057,6 +1065,14 @@
 			path = de.lproj;
 			sourceTree = "<group>";
 		};
+		D6945C3023AC4D21005C403C /* Hashtag Timeline */ = {
+			isa = PBXGroup;
+			children = (
+				D6945C3123AC4D36005C403C /* HashtagTimelineViewController.swift */,
+			);
+			path = "Hashtag Timeline";
+			sourceTree = "<group>";
+		};
 		D6A3BC7223218C6E00FD64D5 /* Utilities */ = {
 			isa = PBXGroup;
 			children = (
@@ -1209,6 +1225,7 @@
 				D6D4DDCF212518A000E1C4BB /* AppDelegate.swift */,
 				D64D0AAC2128D88B005A6F37 /* LocalData.swift */,
 				D627FF75217E923E00CC0648 /* DraftsManager.swift */,
+				D6945C2E23AC47C3005C403C /* SavedHashtagsManager.swift */,
 				D6028B9A2150811100F223B9 /* MastodonCache.swift */,
 				D6C693EE216192C2007D6A6D /* TuskerNavigationDelegate.swift */,
 				D6F1F84E2193B9BE00F5FE67 /* Caching */,
@@ -1641,6 +1658,7 @@
 				0411610022B442870030A9B7 /* AttachmentViewController.swift in Sources */,
 				D611C2CF232DC61100C86A49 /* HashtagTableViewCell.swift in Sources */,
 				D627944F23A9C99800D38C68 /* EditListAccountsViewController.swift in Sources */,
+				D6945C3423AC6431005C403C /* AddSavedHashtagViewController.swift in Sources */,
 				D627943723A552C200D38C68 /* BookmarkStatusActivity.swift in Sources */,
 				D62D2426217ABF63005076CC /* UserActivityType.swift in Sources */,
 				D66362712136338600C9CBA2 /* ComposeViewController.swift in Sources */,
@@ -1680,6 +1698,7 @@
 				0427033822B30F5F000D31B6 /* BehaviorPrefsView.swift in Sources */,
 				D627943923A553B600D38C68 /* UnbookmarkStatusActivity.swift in Sources */,
 				D64D0AAD2128D88B005A6F37 /* LocalData.swift in Sources */,
+				D6945C2F23AC47C3005C403C /* SavedHashtagsManager.swift in Sources */,
 				D6C94D892139E6EC00CB5196 /* AttachmentView.swift in Sources */,
 				D6C693EF216192C2007D6A6D /* TuskerNavigationDelegate.swift in Sources */,
 				D6C94D872139E62700CB5196 /* LargeImageViewController.swift in Sources */,
@@ -1703,6 +1722,7 @@
 				D64F80E2215875CC00BEF393 /* XCBActionType.swift in Sources */,
 				04586B4322B301470021BD04 /* AppearancePrefsView.swift in Sources */,
 				D67C57AF21E28EAD00C3118B /* Array+Uniques.swift in Sources */,
+				D6945C3223AC4D36005C403C /* HashtagTimelineViewController.swift in Sources */,
 				D66362752137068A00C9CBA2 /* Visibility+Helpers.swift in Sources */,
 				D6C693FC2162FE6F007D6A6D /* LoadingViewController.swift in Sources */,
 				D646C95A213B5D0500269FB5 /* LargeImageInteractionController.swift in Sources */,

Tusker/SavedHashtagsManager.swift

@@ -0,0 +1,65 @@
+//
+//  SavedHashtagsManager.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 12/19/19.
+//  Copyright © 2019 Shadowfacts. All rights reserved.
+//
+
+import Foundation
+import Pachyderm
+
+class SavedHashtagsManager: Codable {
+    private(set) static var shared: SavedHashtagsManager = load()
+    
+    private static var documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
+    private static var archiveURL = SavedHashtagsManager.documentsDirectory.appendingPathComponent("saved_hashtags").appendingPathExtension("plist")
+    
+    static func save() {
+        DispatchQueue.global(qos: .userInitiated).async {
+            let encoder = PropertyListEncoder()
+            let data = try? encoder.encode(shared)
+            try? data?.write(to: archiveURL, options: .noFileProtection)
+        }
+    }
+    
+    static func load() -> SavedHashtagsManager {
+        let decoder = PropertyListDecoder()
+        if let data = try? Data(contentsOf: archiveURL),
+            let savedHashtagsManager = try? decoder.decode(Self.self, from: data) {
+            return savedHashtagsManager
+        }
+        return SavedHashtagsManager()
+    }
+    
+    private init() {}
+    
+    private var savedHashtags: [Hashtag] = []
+    var sorted: [Hashtag] {
+        return savedHashtags.sorted(by: { $0.name > $1.name })
+    }
+    
+    func isSaved(_ hashtag: Hashtag) -> Bool {
+        return savedHashtags.contains(hashtag)
+    }
+    
+    func add(_ hashtag: Hashtag) {
+        if isSaved(hashtag) {
+            return
+        }
+        savedHashtags.append(hashtag)
+        SavedHashtagsManager.save()
+        NotificationCenter.default.post(name: .savedHashtagsChanged, object: nil)
+    }
+    
+    func remove(_ hashtag: Hashtag) {
+        guard isSaved(hashtag) else { return }
+        savedHashtags.removeAll(where: { $0.name == hashtag.name })
+        SavedHashtagsManager.save()
+        NotificationCenter.default.post(name: .savedHashtagsChanged, object: nil)
+    }
+}
+
+extension Foundation.Notification.Name {
+    static let savedHashtagsChanged = Notification.Name("savedHashtagsChanged")
+}

Tusker/Screens/Explore/AddSavedHashtagViewController.swift

@@ -0,0 +1,58 @@
+//
+//  AddSavedHashtagViewController.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 12/19/19.
+//  Copyright © 2019 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+import Pachyderm
+
+class AddSavedHashtagViewController: SearchResultsViewController {
+
+    var searchController: UISearchController!
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+
+        delegate = self
+        onlySections = [.hashtags]
+        
+        searchController = UISearchController(searchResultsController: nil)
+        searchController.obscuresBackgroundDuringPresentation = false
+        searchController.hidesNavigationBarDuringPresentation = false
+        searchController.searchBar.autocapitalizationType = .none
+        searchController.searchBar.placeholder = NSLocalizedString("Search for hashtags to save", comment: "add saved hashtag search field placeholder")
+        searchController.searchBar.delegate = self
+        
+        definesPresentationContext = true
+        
+        navigationItem.searchController = searchController
+        navigationItem.hidesSearchBarWhenScrolling = false
+        
+        navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(cancelButtonPressed))
+    }
+    
+    override func performSearch(query: String?) {
+        if let query = query, !query.starts(with: "#") {
+            super.performSearch(query: "#\(query)")
+        } else {
+            super.performSearch(query: query)
+        }
+    }
+    
+    // MARK: - Interaction
+    
+    @objc func cancelButtonPressed() {
+        dismiss(animated: true)
+    }
+
+}
+
+extension AddSavedHashtagViewController: SearchResultsViewControllerDelegate {
+    func selectedSearchResult(hashtag: Hashtag) {
+        SavedHashtagsManager.shared.add(hashtag)
+        dismiss(animated: true)
+    }
+}

Tusker/Screens/Explore/ExploreViewController.swift

@@ -43,7 +43,7 @@ class ExploreViewController: EnhancedTableViewController {
                 cell.accessoryType = .disclosureIndicator
 
             case let .list(list):
-                cell.imageView!.image = nil
+                cell.imageView!.image = UIImage(systemName: "list.bullet")
                 cell.textLabel!.text = list.title
                 cell.accessoryType = .disclosureIndicator
 
@@ -51,6 +51,16 @@ class ExploreViewController: EnhancedTableViewController {
                 cell.imageView!.image = UIImage(systemName: "plus")
                 cell.textLabel!.text = NSLocalizedString("New List...", comment: "new list nav item title")
                 cell.accessoryType = .none
+                
+            case let .savedHashtag(hashtag):
+                cell.imageView!.image = UIImage(systemName: "number")
+                cell.textLabel!.text = hashtag.name
+                cell.accessoryType = .disclosureIndicator
+                
+            case .addSavedHashtag:
+                cell.imageView!.image = UIImage(systemName: "plus")
+                cell.textLabel!.text = NSLocalizedString("Save Hashtag...", comment: "save hashtag nav item title")
+                cell.accessoryType = .none
             }
             
             return cell
@@ -58,9 +68,10 @@ class ExploreViewController: EnhancedTableViewController {
         dataSource.exploreController = self
         
         var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
-        snapshot.appendSections([.bookmarks, .lists])
+        snapshot.appendSections([.bookmarks, .lists, .savedHashtags])
         snapshot.appendItems([.bookmarks], toSection: .bookmarks)
         snapshot.appendItems([.addList], toSection: .lists)
+        snapshot.appendItems(SavedHashtagsManager.shared.sorted.map { .savedHashtag($0) } + [.addSavedHashtag], toSection: .savedHashtags)
         // the initial, static items should not be displayed with an animation
         UIView.performWithoutAnimation {
             dataSource.apply(snapshot)
@@ -77,6 +88,8 @@ class ExploreViewController: EnhancedTableViewController {
         navigationItem.searchController = searchController
         navigationItem.hidesSearchBarWhenScrolling = false
         
+        NotificationCenter.default.addObserver(self, selector: #selector(savedHashtagsChanged), name: .savedHashtagsChanged, object: nil)
+        
         reloadLists()
     }
     
@@ -88,8 +101,7 @@ class ExploreViewController: EnhancedTableViewController {
             }
             
             var snapshot = self.dataSource.snapshot()
-            snapshot.deleteSections([.lists])
+            snapshot.deleteItems(snapshot.itemIdentifiers(inSection: .lists))
-            snapshot.appendSections([.lists])
             snapshot.appendItems(lists.map { .list($0) } + [.addList], toSection: .lists)
 
             DispatchQueue.main.async {
@@ -98,6 +110,39 @@ class ExploreViewController: EnhancedTableViewController {
         }
     }
     
+    @objc func savedHashtagsChanged() {
+        var snapshot = dataSource.snapshot()
+        snapshot.deleteItems(snapshot.itemIdentifiers(inSection: .savedHashtags))
+        snapshot.appendItems(SavedHashtagsManager.shared.sorted.map { .savedHashtag($0) } + [.addSavedHashtag], toSection: .savedHashtags)
+        dataSource.apply(snapshot)
+    }
+    
+    func deleteList(_ list: List) {
+        let title = String(format: NSLocalizedString("Are you sure want to delete the '%@' list?", comment: "delete list alert title"), list.title)
+        let alert = UIAlertController(title: title, message: nil, preferredStyle: .alert)
+        alert.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: "delete list alert cancel button"), style: .cancel, handler: nil))
+        alert.addAction(UIAlertAction(title: NSLocalizedString("Delete List", comment: "delete list alert confirm button"), style: .destructive, handler: { (_) in
+            
+            let request = List.delete(list)
+            MastodonController.client.run(request) { (response) in
+                guard case .success(_, _) = response else {
+                    fatalError()
+                }
+                
+                var snapshot = self.dataSource.snapshot()
+                snapshot.deleteItems([.list(list)])
+                DispatchQueue.main.async {
+                    self.dataSource.apply(snapshot)
+                }
+            }
+        }))
+        present(alert, animated: true)
+    }
+    
+    func removeSavedHashtag(_ hashtag: Hashtag) {
+        SavedHashtagsManager.shared.remove(hashtag)
+    }
+    
     // MARK: - Table view delegate
     
     override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
@@ -133,6 +178,14 @@ class ExploreViewController: EnhancedTableViewController {
                 }
             }))
             present(alert, animated: true)
+            
+        case let .savedHashtag(hashtag):
+            show(HashtagTimelineViewController(for: hashtag), sender: nil)
+            
+        case .addSavedHashtag:
+            tableView.selectRow(at: nil, animated: true, scrollPosition: .none)
+            let navController = UINavigationController(rootViewController: AddSavedHashtagViewController())
+            present(navController, animated: true)
         }
     }
 
@@ -146,11 +199,14 @@ extension ExploreViewController {
     enum Section: CaseIterable {
         case bookmarks
         case lists
+        case savedHashtags
     }
     enum Item: Hashable {
         case bookmarks
         case list(List)
         case addList
+        case savedHashtag(Hashtag)
+        case addSavedHashtag
 
         static func == (lhs: ExploreViewController.Item, rhs: ExploreViewController.Item) -> Bool {
             switch (lhs, rhs) {
@@ -160,6 +216,10 @@ extension ExploreViewController {
                 return a.id == b.id
             case (.addList, .addList):
                 return true
+            case let (.savedHashtag(a), .savedHashtag(b)):
+                return a == b
+            case (.addSavedHashtag, .addSavedHashtag):
+                return true
             default:
                 return false
             }
@@ -173,6 +233,11 @@ extension ExploreViewController {
                 hasher.combine(list.id)
             case .addList:
                 hasher.combine("addList")
+            case let .savedHashtag(hashtag):
+                hasher.combine("savedHashtag")
+                hasher.combine(hashtag.name)
+            case .addSavedHashtag:
+                hasher.combine("addSavedHashtag")
             }
         }
     }
@@ -185,43 +250,39 @@ extension ExploreViewController {
             switch section {
             case 1:
                 return NSLocalizedString("Lists", comment: "explore lists section title")
+            case 2:
+                return NSLocalizedString("Saved Hashtags", comment: "explore saved hashtags section title")
             default:
                 return nil
             }
         }
         
         override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
-            if case .list(_) = itemIdentifier(for: indexPath) {
+            switch itemIdentifier(for: indexPath) {
+            case .list(_):
                 return true
-            }
+            case .savedHashtag(_):
+                return true
+            default:
                 return false
             }
+        }
 
         override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
             guard editingStyle == .delete,
-                case let .list(list) = itemIdentifier(for: indexPath) else {
+                let exploreController = exploreController else {
                 return
             }
             
-            let title = String(format: NSLocalizedString("Are you sure want to delete the '%@' list?", comment: "delete list alert title"), list.title)
+            switch itemIdentifier(for: indexPath) {
-            let alert = UIAlertController(title: title, message: nil, preferredStyle: .alert)
+            case let .list(list):
-            alert.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: "delete list alert cancel button"), style: .cancel, handler: nil))
+                exploreController.deleteList(list)
-            alert.addAction(UIAlertAction(title: NSLocalizedString("Delete List", comment: "delete list alert confirm button"), style: .destructive, handler: { (_) in
+            case let .savedHashtag(hashtag):
-                
+                exploreController.removeSavedHashtag(hashtag)
-                let request = List.delete(list)
+            default:
-                MastodonController.client.run(request) { (response) in
+                return
-                    guard case .success(_, _) = response else {
-                        fatalError()
             }
 
-                    var snapshot = self.snapshot()
-                    snapshot.deleteItems([.list(list)])
-                    DispatchQueue.main.async {
-                        self.apply(snapshot)
-                    }
-                }
-            }))
-            self.exploreController?.present(alert, animated: true)
         }
         
     }

Tusker/Screens/Hashtag Timeline/HashtagTimelineViewController.swift

@@ -0,0 +1,58 @@
+//
+//  HashtagTimelineViewController.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 12/19/19.
+//  Copyright © 2019 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+import Pachyderm
+
+class HashtagTimelineViewController: TimelineTableViewController {
+
+    let hashtag: Hashtag
+    
+    var toggleSaveButton: UIBarButtonItem!
+    var toggleSaveButtonTitle: String {
+        if SavedHashtagsManager.shared.isSaved(hashtag) {
+            return NSLocalizedString("Unsave", comment: "unsave hashtag button")
+        } else {
+            return NSLocalizedString("Save", comment: "save hashtag button")
+        }
+    }
+    
+    init(for hashtag: Hashtag) {
+        self.hashtag = hashtag
+        
+        super.init(for: .tag(hashtag: hashtag.name))
+    }
+    
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+
+        toggleSaveButton = UIBarButtonItem(title: toggleSaveButtonTitle, style: .plain, target: self, action: #selector(toggleSaveButtonPressed))
+        navigationItem.rightBarButtonItem = toggleSaveButton
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(savedHashtagsChanged), name: .savedHashtagsChanged, object: nil)
+    }
+    
+    @objc func savedHashtagsChanged() {
+        toggleSaveButton.title = toggleSaveButtonTitle
+    }
+    
+    // MARK: - Interaction
+    
+    @objc func toggleSaveButtonPressed() {
+        if SavedHashtagsManager.shared.isSaved(hashtag) {
+            SavedHashtagsManager.shared.remove(hashtag)
+        } else {
+            SavedHashtagsManager.shared.add(hashtag)
+        }
+    }
+
+}

Tusker/TuskerNavigationDelegate.swift

@@ -76,7 +76,7 @@ extension TuskerNavigationDelegate where Self: UIViewController {
     }
     
     func selected(tag: Hashtag) {
-        show(TimelineTableViewController(for: .tag(hashtag: tag.name)), sender: self)
+        show(HashtagTimelineViewController(for: tag), sender: self)
     }
     
     func selected(url: URL) {

Tusker/Views/ContentLabel.swift

@@ -181,7 +181,7 @@ class ContentLabel: LinkLabel {
         if let mention = getMention(for: url, text: text) {
             return ProfileTableViewController(accountID: mention.id)
         } else if let tag = getHashtag(for: url, text: text) {
-            return TimelineTableViewController(for: .tag(hashtag: tag.name))
+            return HashtagTimelineViewController(for: tag)
         } else {
             return SFSafariViewController(url: url)
         }