Custom emoji in push notifications, behind a feature flag

NotificationExtension/NotificationService.swift

@@ -15,9 +15,13 @@ import Pachyderm
 import Intents
 import HTMLStreamer
 import WebURL
+import UIKit
+import TuskerPreferences
 
 private let logger = Logger(subsystem: Bundle.main.bundleIdentifier!, category: "NotificationService")
 
+private let emojiRegex = try! NSRegularExpression(pattern: ":(\\w+):", options: [])
+
 class NotificationService: UNNotificationServiceExtension {
     
     private static let textConverter = TextConverter(configuration: .init(insertNewlines: false), callbacks: HTMLCallbacks.self)
@@ -225,8 +229,33 @@ class NotificationService: UNNotificationServiceExtension {
         }
         
         let updatedContent: UNMutableNotificationContent
+       
+        let contentProviding: any UNNotificationContentProviding
+        if #available(iOS 18.0, *),
+           await Preferences.shared.hasFeatureFlag(.pushNotifCustomEmoji) {
+            let attributedString = NSMutableAttributedString(string: content.body)
+            
+            for match in emojiRegex.matches(in: content.body, range: NSRange(location: 0, length: content.body.utf16.count)).reversed() {
+                let emojiName = (content.body as NSString).substring(with: match.range(at: 1))
+                guard let emoji = notification.status?.emojis.first(where: { $0.shortcode == emojiName }),
+                      let url = URL(emoji.url),
+                      let (data, _) = try? await URLSession.shared.data(from: url),
+                      let image = UIImage(data: data) else {
+                    continue
+                }
+                let attachment = NSTextAttachment(image: image)
+                let attachmentStr = NSAttributedString(attachment: attachment)
+                attributedString.replaceCharacters(in: match.range, with: attachmentStr)
+            }
+            
+            let attributedCtx = UNNotificationAttributedMessageContext(sendMessageIntent: intent, attributedContent: attributedString)
+            contentProviding = attributedCtx
+        } else {
+            contentProviding = intent
+        }
+        
         do {
-            let newContent = try content.updating(from: intent)
+            let newContent = try content.updating(from: contentProviding)
             if let newMutableContent = newContent.mutableCopy() as? UNMutableNotificationContent {
                 pendingRequest?.0 = newMutableContent
                 updatedContent = newMutableContent

Packages/TuskerPreferences/Sources/TuskerPreferences/Supporting Types/FeatureFlag.swift

@@ -9,4 +9,5 @@ import Foundation
 
 public enum FeatureFlag: String, Codable {
     case iPadBrowserNavigation = "ipad-browser-navigation"
+    case pushNotifCustomEmoji = "push-notif-custom-emoji"
 }

Tusker.xcodeproj/project.pbxproj

@@ -77,6 +77,7 @@
 		D620483823D38190008A63EF /* StatusContentTextView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D620483723D38190008A63EF /* StatusContentTextView.swift */; };
 		D6210D762C0B924F009BB569 /* RemoveProfileSuggestionService.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6210D752C0B924F009BB569 /* RemoveProfileSuggestionService.swift */; };
 		D621733328F1D5ED004C7DB1 /* ReblogService.swift in Sources */ = {isa = PBXBuildFile; fileRef = D621733228F1D5ED004C7DB1 /* ReblogService.swift */; };
+		D62220472C7EA8DF003E43B7 /* TuskerPreferences in Frameworks */ = {isa = PBXBuildFile; productRef = D62220462C7EA8DF003E43B7 /* TuskerPreferences */; };
 		D62275A824F1CA2800B82A16 /* ComposeReplyContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D62275A724F1CA2800B82A16 /* ComposeReplyContentView.swift */; };
 		D623A53D2635F5590095BD04 /* StatusPollView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D623A53C2635F5590095BD04 /* StatusPollView.swift */; };
 		D623A5412635FB3C0095BD04 /* PollOptionView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D623A5402635FB3C0095BD04 /* PollOptionView.swift */; };
@@ -828,6 +829,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				D630C4252BC7845800208903 /* WebURL in Frameworks */,
+				D62220472C7EA8DF003E43B7 /* TuskerPreferences in Frameworks */,
 				D630C4232BC7842C00208903 /* HTMLStreamer in Frameworks */,
 				D630C3E52BC6313400208903 /* Pachyderm in Frameworks */,
 				D630C3DF2BC61C4900208903 /* PushNotifications in Frameworks */,
@@ -1795,6 +1797,7 @@
 				D630C3E42BC6313400208903 /* Pachyderm */,
 				D630C4222BC7842C00208903 /* HTMLStreamer */,
 				D630C4242BC7845800208903 /* WebURL */,
+				D62220462C7EA8DF003E43B7 /* TuskerPreferences */,
 			);
 			productName = NotificationExtension;
 			productReference = D630C3D12BC61B6000208903 /* NotificationExtension.appex */;
@@ -3299,6 +3302,10 @@
 			isa = XCSwiftPackageProductDependency;
 			productName = Pachyderm;
 		};
+		D62220462C7EA8DF003E43B7 /* TuskerPreferences */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = TuskerPreferences;
+		};
 		D630C3C72BC43AFD00208903 /* PushNotifications */ = {
 			isa = XCSwiftPackageProductDependency;
 			productName = PushNotifications;