Localized title

Localizations/Localizable.strings

@@ -1,10 +1,12 @@
 // Copyright © 2020 Metabolist. All rights reserved.
 
+"account.%@-followers" = "%@'s Followers";
 "account.block" = "Block";
 "account.field.verified" = "Verified %@";
 "account.follow" = "Follow";
 "account.following" = "Following";
 "account.following-count" = "%ld Following";
+"account.followed-by-%@" = "Followed by %@";
 "account.hide-reblogs" = "Hide boosts";
 "account.mute" = "Mute";
 "account.request" = "Request";

ServiceLayer/Sources/ServiceLayer/Services/AccountListService.swift

@@ -15,13 +15,18 @@ public struct AccountListService {
     private let endpoint: AccountsEndpoint
     private let mastodonAPIClient: MastodonAPIClient
     private let contentDatabase: ContentDatabase
+    private let titleComponents: [String]?
     private let nextPageMaxIdSubject = PassthroughSubject<String, Never>()
 
-    init(endpoint: AccountsEndpoint, mastodonAPIClient: MastodonAPIClient, contentDatabase: ContentDatabase) {
+    init(endpoint: AccountsEndpoint,
+         mastodonAPIClient: MastodonAPIClient,
+         contentDatabase: ContentDatabase,
+         titleComponents: [String]? = nil) {
         list = AccountList()
         self.endpoint = endpoint
         self.mastodonAPIClient = mastodonAPIClient
         self.contentDatabase = contentDatabase
+        self.titleComponents = titleComponents
         sections = contentDatabase.accountListPublisher(list)
             .map { [$0.map(CollectionItem.account)] }
             .eraseToAnyPublisher()
@@ -41,4 +46,12 @@ extension AccountListService: CollectionService {
             .flatMap { contentDatabase.append(accounts: $0.result, toList: list) }
             .eraseToAnyPublisher()
     }
+
+    public var titleLocalizationComponents: AnyPublisher<[String], Never> {
+        if let titleComponents = titleComponents {
+            return Just(titleComponents).eraseToAnyPublisher()
+        } else {
+            return Empty().eraseToAnyPublisher()
+        }
+    }
 }

ServiceLayer/Sources/ServiceLayer/Services/AccountService.swift

@@ -95,14 +95,16 @@ public extension AccountService {
         AccountListService(
             endpoint: .accountsFollowing(id: account.id),
             mastodonAPIClient: mastodonAPIClient,
-            contentDatabase: contentDatabase)
+            contentDatabase: contentDatabase,
+            titleComponents: ["account.followed-by-%@", "@".appending(account.acct)])
     }
 
     func followersService() -> AccountListService {
         AccountListService(
             endpoint: .accountsFollowers(id: account.id),
             mastodonAPIClient: mastodonAPIClient,
-            contentDatabase: contentDatabase)
+            contentDatabase: contentDatabase,
+            titleComponents: ["account.%@-followers", "@".appending(account.acct)])
     }
 }
 

ServiceLayer/Sources/ServiceLayer/Services/CollectionService.swift

@@ -7,6 +7,7 @@ public protocol CollectionService {
     var sections: AnyPublisher<[[CollectionItem]], Error> { get }
     var nextPageMaxId: AnyPublisher<String, Never> { get }
     var title: AnyPublisher<String, Never> { get }
+    var titleLocalizationComponents: AnyPublisher<[String], Never> { get }
     var navigationService: NavigationService { get }
     var markerTimeline: Marker.Timeline? { get }
     func request(maxId: String?, minId: String?) -> AnyPublisher<Never, Error>
@@ -17,5 +18,7 @@ extension CollectionService {
 
     public var title: AnyPublisher<String, Never> { Empty().eraseToAnyPublisher() }
 
+    public var titleLocalizationComponents: AnyPublisher<[String], Never> { Empty().eraseToAnyPublisher() }
+
     public var markerTimeline: Marker.Timeline? { nil }
 }

View Controllers/TableViewController.swift

@@ -228,6 +228,15 @@ private extension TableViewController {
     func setupViewModelBindings() {
         viewModel.title.sink { [weak self] in self?.navigationItem.title = $0 }.store(in: &cancellables)
 
+        viewModel.titleLocalizationComponents.sink { [weak self] in
+            guard let key = $0.first else { return }
+
+            self?.navigationItem.title = String(
+                format: NSLocalizedString(key, comment: ""),
+                arguments: Array($0.suffix(from: 1)))
+        }
+        .store(in: &cancellables)
+
         viewModel.updates.sink { [weak self] in self?.update($0) }.store(in: &cancellables)
 
         viewModel.events.receive(on: DispatchQueue.main)

ViewModels/Sources/ViewModels/CollectionItemsViewModel.swift

@@ -66,6 +66,10 @@ extension CollectionItemsViewModel: CollectionViewModel {
 
     public var title: AnyPublisher<String, Never> { collectionService.title }
 
+    public var titleLocalizationComponents: AnyPublisher<[String], Never> {
+        collectionService.titleLocalizationComponents
+    }
+
     public var expandAll: AnyPublisher<ExpandAllState, Never> {
         expandAllSubject.eraseToAnyPublisher()
     }

ViewModels/Sources/ViewModels/CollectionViewModel.swift

@@ -6,6 +6,7 @@ import Foundation
 public protocol CollectionViewModel {
     var updates: AnyPublisher<CollectionUpdate, Never> { get }
     var title: AnyPublisher<String, Never> { get }
+    var titleLocalizationComponents: AnyPublisher<[String], Never> { get }
     var expandAll: AnyPublisher<ExpandAllState, Never> { get }
     var alertItems: AnyPublisher<AlertItem, Never> { get }
     var loading: AnyPublisher<Bool, Never> { get }

ViewModels/Sources/ViewModels/ProfileViewModel.swift

@@ -70,6 +70,10 @@ extension ProfileViewModel: CollectionViewModel {
         $accountViewModel.compactMap { $0?.accountName }.eraseToAnyPublisher()
     }
 
+    public var titleLocalizationComponents: AnyPublisher<[String], Never> {
+        collectionViewModel.flatMap(\.titleLocalizationComponents).eraseToAnyPublisher()
+    }
+
     public var expandAll: AnyPublisher<ExpandAllState, Never> {
         Empty().eraseToAnyPublisher()
     }