Push-уведомления: Telegram-parity in-app баннер, threadIdentifier группировка и letter-avatar в NSE

RosettaNotificationService/NotificationService.swift

@@ -1,3 +1,4 @@
+import UIKit
 import UserNotifications
 import Intents
 
@@ -161,7 +162,13 @@ final class NotificationService: UNNotificationServiceExtension {
             }
         }
 
-        // 5. Normalize sender_public_key in userInfo for tap navigation.
+        // 5. Group notifications by conversation (Telegram parity).
+        // iOS stacks notifications from the same chat together.
+        if !senderKey.isEmpty {
+            content.threadIdentifier = senderKey
+        }
+
+        // 6. Normalize sender_public_key in userInfo for tap navigation.
         var updatedInfo = content.userInfo
         if !senderKey.isEmpty {
             updatedInfo["sender_public_key"] = senderKey
@@ -217,11 +224,13 @@ final class NotificationService: UNNotificationServiceExtension {
         senderKey: String
     ) -> UNNotificationContent {
         let handle = INPersonHandle(value: senderKey, type: .unknown)
+        let displayName = senderName.isEmpty ? "Rosetta" : senderName
+        let avatarImage = generateLetterAvatar(name: displayName, key: senderKey)
         let sender = INPerson(
             personHandle: handle,
             nameComponents: nil,
-            displayName: senderName.isEmpty ? "Rosetta" : senderName,
-            image: nil,
+            displayName: displayName,
+            image: avatarImage,
             contactIdentifier: nil,
             customIdentifier: senderKey
         )
@@ -237,6 +246,11 @@ final class NotificationService: UNNotificationServiceExtension {
             attachments: nil
         )
 
+        // Set avatar on sender parameter (Telegram parity: 50x50 letter avatar).
+        if let avatarImage {
+            intent.setImage(avatarImage, forParameterNamed: \.sender)
+        }
+
         // Donate the intent so Siri can learn communication patterns.
         let interaction = INInteraction(intent: intent, response: nil)
         interaction.direction = .incoming
@@ -254,6 +268,68 @@ final class NotificationService: UNNotificationServiceExtension {
         }
     }
 
+    // MARK: - Letter Avatar (Telegram parity: colored circle with initials)
+
+    /// Mantine avatar color palette — matches AvatarView in main app.
+    private static let avatarColors: [(bg: UInt32, text: UInt32)] = [
+        (0x4C6EF5, 0xDBE4FF), // indigo
+        (0x7950F2, 0xE5DBFF), // violet
+        (0xF06595, 0xFFDEEB), // pink
+        (0xFF6B6B, 0xFFE3E3), // red
+        (0xFD7E14, 0xFFE8CC), // orange
+        (0xFAB005, 0xFFF3BF), // yellow
+        (0x40C057, 0xD3F9D8), // green
+        (0x12B886, 0xC3FAE8), // teal
+        (0x15AABF, 0xC5F6FA), // cyan
+        (0x228BE6, 0xD0EBFF), // blue
+        (0xBE4BDB, 0xF3D9FA), // grape
+    ]
+
+    /// Generates a 50x50 circular letter avatar as INImage for notification display.
+    private static func generateLetterAvatar(name: String, key: String) -> INImage? {
+        let size: CGFloat = 50
+        let colorIndex = abs(key.hashValue) % avatarColors.count
+        let colors = avatarColors[colorIndex]
+        let initial = String(name.prefix(1)).uppercased()
+
+        UIGraphicsBeginImageContextWithOptions(CGSize(width: size, height: size), false, 2.0)
+        guard let ctx = UIGraphicsGetCurrentContext() else { return nil }
+
+        // Background circle.
+        let bgColor = UIColor(
+            red: CGFloat((colors.bg >> 16) & 0xFF) / 255,
+            green: CGFloat((colors.bg >> 8) & 0xFF) / 255,
+            blue: CGFloat(colors.bg & 0xFF) / 255,
+            alpha: 1
+        )
+        ctx.setFillColor(bgColor.cgColor)
+        ctx.fillEllipse(in: CGRect(x: 0, y: 0, width: size, height: size))
+
+        // Initial letter.
+        let textColor = UIColor(
+            red: CGFloat((colors.text >> 16) & 0xFF) / 255,
+            green: CGFloat((colors.text >> 8) & 0xFF) / 255,
+            blue: CGFloat(colors.text & 0xFF) / 255,
+            alpha: 1
+        )
+        let font = UIFont.systemFont(ofSize: size * 0.38, weight: .bold)
+        let attrs: [NSAttributedString.Key: Any] = [.font: font, .foregroundColor: textColor]
+        let textSize = (initial as NSString).size(withAttributes: attrs)
+        let textRect = CGRect(
+            x: (size - textSize.width) / 2,
+            y: (size - textSize.height) / 2,
+            width: textSize.width,
+            height: textSize.height
+        )
+        (initial as NSString).draw(in: textRect, withAttributes: attrs)
+
+        let image = UIGraphicsGetImageFromCurrentImageContext()
+        UIGraphicsEndImageContext()
+
+        guard let pngData = image?.pngData() else { return nil }
+        return INImage(imageData: pngData)
+    }
+
     // MARK: - Helpers
 
     /// Android parity: extract sender key from multiple possible key names.