feat: ExtensionKit PoC

Sources/ExtensionKit/iMastExtensionKit.swift

@@ -0,0 +1,70 @@
+//
+//  iMastExtensionKit.swift
+//
+//  iMast https://github.com/cinderella-project/iMast
+//
+//  Created by user on 2025/07/01.
+//
+//  ------------------------------------------------------------------------
+//
+//  Copyright 2017-2021 rinsuki and other contributors.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+
+import Foundation
+import ExtensionKit
+
+public struct SocialUser: Codable {
+    public var uri: String
+    public var acct: String
+
+    public init(uri: String, acct: String) {
+        self.uri = uri
+        self.acct = acct
+    }
+}
+
+public struct SocialPost: Codable {
+    public var uri: String
+    public var author: SocialUser
+
+    public init(uri: String, author: SocialUser) {
+        self.uri = uri
+        self.author = author
+    }
+}
+
+public enum PostActionResult: Codable {
+    case composeReply(text: String)
+}
+
+public protocol _SocialExtension: AnyObject, Sendable, AppExtension {
+
+}
+
+extension _SocialExtension {
+}
+
+public protocol PostActionExtension: _SocialExtension {
+    func performAction(for post: SocialPost) -> PostActionResult?
+}
+
+extension PostActionExtension {
+    public var configuration: ConnectionHandler {
+        return ConnectionHandler { request in
+            request.accept { [weak self] (post: SocialPost) in
+                return self?.performAction(for: post)
+            }
+        }
+    }
+}

Sources/iOS/App/CustomViews/Post/PostDetail/MastodonPostDetailReactionBarViewController.swift

@@ -25,6 +25,8 @@ import UIKit
 import Mew
 import Ikemen
 import iMastiOSCore
+import ExtensionFoundation
+import iMastExtensionKit
 
 class MastodonPostDetailReactionBarViewController: UIViewController, Instantiatable, Injectable {
     typealias Input = MastodonPost
@@ -126,32 +128,74 @@ class MastodonPostDetailReactionBarViewController: UIViewController, Instantiata
     }
 
     func buildOthersMenu() async throws -> [UIMenuElement] {
-        var elements = [UICommand]()
+        var elements = [UIMenuElement]()
         let version = try await environment.getIntVersion()
         if version.supportingFeature(.bookmark) {
             if input.bookmarked {
-                elements.append(.init(title: "ブックマークから削除", image: UIImage(systemName: "bookmark.slash"), action: #selector(removeFromBookmark)))
+                elements.append(UICommand(title: "ブックマークから削除", image: UIImage(systemName: "bookmark.slash"), action: #selector(removeFromBookmark)))
             } else {
-                elements.append(.init(title: "ブックマーク", image: UIImage(systemName: "bookmark"), action: #selector(addToBookmark)))
+                elements.append(UICommand(title: "ブックマーク", image: UIImage(systemName: "bookmark"), action: #selector(addToBookmark)))
             }
         }
         if version.supportingFeature(.editPost) {
             if input.account.acct == environment.screenName {
-                elements.append(.init(title: L10n.NewPost.edit, image: UIImage(systemName: "pencil"), action: #selector(openEditPostVC)))
+                elements.append(UICommand(title: L10n.NewPost.edit, image: UIImage(systemName: "pencil"), action: #selector(openEditPostVC)))
             }
         }
-        elements.append(.init(title: L10n.Localizable.PostDetail.share, image: UIImage(systemName: "square.and.arrow.up"), action: #selector(openShareSheet)))
-        elements.append(.init(title: L10n.Localizable.Bunmyaku.title, image: UIImage(systemName: "list.bullet.indent"), action: #selector(openBunmyakuVC)))
+        elements.append(UICommand(title: L10n.Localizable.PostDetail.share, image: UIImage(systemName: "square.and.arrow.up"), action: #selector(openShareSheet)))
+        if #available(iOS 26, *) {
+            elements.append(UIMenu(title: "拡張機能", image: UIImage(systemName: "puzzlepiece.extension"), children: [UIDeferredMenuElement({ callback in
+                Task {
+                    let monitor = try? await AppExtensionPoint.Monitor(appExtensionPoint: .postActionExtension)
+                    var items: [UIMenuElement] = []
+                    for identity in monitor?.identities ?? [] {
+                        items.append(UIAction(title: identity.localizedName, handler: { _ in
+                            self.handleExtension(identity: identity)
+                        }))
+                    }
+                    await MainActor.run {
+                        callback(items)
+                    }
+                }
+            })]))
+        }
+        elements.append(UICommand(title: L10n.Localizable.Bunmyaku.title, image: UIImage(systemName: "list.bullet.indent"), action: #selector(openBunmyakuVC)))
         if input.hasCustomEmoji {
-            elements.append(.init(title: L10n.Localizable.CustomEmojis.title, action: #selector(openEmojiListVC)))
+            elements.append(UICommand(title: L10n.Localizable.CustomEmojis.title, action: #selector(openEmojiListVC)))
         }
         if environment.screenName == input.account.acct {
-            elements.append(.init(title: L10n.Localizable.PostDetail.delete, image: UIImage(systemName: "trash"), action: #selector(confirmDeletePost), attributes: .destructive))
+            elements.append(UICommand(title: L10n.Localizable.PostDetail.delete, image: UIImage(systemName: "trash"), action: #selector(confirmDeletePost), attributes: .destructive))
         }
-        elements.append(.init(title: L10n.Localizable.PostDetail.reportAbuse, image: UIImage(systemName: "exclamationmark.bubble"), action: #selector(openAbuseVC)))
+        elements.append(UICommand(title: L10n.Localizable.PostDetail.reportAbuse, image: UIImage(systemName: "exclamationmark.bubble"), action: #selector(openAbuseVC)))
         return elements
     }
 
+    @available(iOS 26, *)
+    func handleExtension(identity: AppExtensionIdentity) {
+        let input = self.input.originalPost
+        Task {
+            let config = AppExtensionProcess.Configuration(appExtensionIdentity: identity)
+            let proc = try await AppExtensionProcess(configuration: config)
+            let connection = try proc.makeXPCSession()
+            try connection.activate()
+            try connection.send(SocialPost(uri: "", author: .init(uri: "", acct: input.account.acct))) { (result: Result<PostActionResult, any Error>) in
+                switch result {
+                case .success(.composeReply(let text)):
+                    DispatchQueue.main.async {
+                        let post = self.input.originalPost
+                        self.showAsWindow(userActivity: .init(newPostWithMastodonUserToken: self.environment) ※ {
+                            $0.setNewPostReplyInfo(post)
+                            $0.newPostSuffix = text
+                        }, fallback: .push)
+                    }
+                default:
+                    print(result)
+                }
+                connection.cancel(reason: "")
+            }
+        }
+    }
+
     @objc func openReplyVC() {
         let post = self.input.originalPost
         showAsWindow(userActivity: .init(newPostWithMastodonUserToken: environment) ※ {

Sources/iOS/App/ExternalExtensionSupport/ExtensionPoint.swift

@@ -0,0 +1,33 @@
+//
+//  ExtensionPoint.swift
+//
+//  iMast https://github.com/cinderella-project/iMast
+//
+//  Created by user on 2025/07/01.
+//
+//  ------------------------------------------------------------------------
+//
+//  Copyright 2017-2021 rinsuki and other contributors.
+// 
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+// 
+//      http://www.apache.org/licenses/LICENSE-2.0
+// 
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+
+import ExtensionFoundation
+
+@available(iOS 26.0, *)
+extension AppExtensionPoint {
+    @Definition
+    public static var postActionExtension: AppExtensionPoint {
+        Name("PostActionV1")
+        Scope(restriction: .none)
+    }
+}

Sources/iOS/App/Screens/OtherMenu/Settings/SettingsView.swift

@@ -25,6 +25,7 @@ import SwiftUI
 import iMastiOSCore
 import SDWebImage
 import SafariServices
+import ExtensionKit
 
 class NewSettingsViewController: UIHostingController<SettingsView> {
     init() {
@@ -393,13 +394,32 @@ struct DeveloperSettingsView: View {
                     Button("OK") {
                     }
                 }
+                if #available(iOS 26.0, *) {
+                    NavigationLink {
+                        ExtensionManageView()
+                    } label: {
+                        Text("Manage Extensions")
+                    }
+                }
             }
         }
         .attach(errorReporter: errorReporter)
         .navigationTitle("内部設定")
     }
 }
 
+@available(iOS 26.0, *)
+struct ExtensionManageView: View, UIViewControllerRepresentable {
+    typealias UIViewControllerType = EXAppExtensionBrowserViewController
+
+    func makeUIViewController(context: Context) -> UIViewControllerType {
+        EXAppExtensionBrowserViewController()
+    }
+
+    func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) {
+    }
+}
+
 struct SettingsView_Previews: PreviewProvider {
     static var previews: some View {
         SettingsView()