Add dedicated PillTextAttachmentData codable

Riot/Modules/Pills/PillTextAttachmentData.swift

@@ -0,0 +1,42 @@
+// 
+// Copyright 2022 New Vector Ltd
+//
+// 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
+
+/// Data associated with a Pill text attachment.
+@available (iOS 15.0, *)
+struct PillTextAttachmentData: Codable {
+    /// Matrix item identifier (user id or room id)
+    var matrixItemId: String
+    /// Matrix item display name (user or room display name)
+    var displayName: String?
+    /// Matrix item avatar URL (user or room avatar url)
+    var avatarUrl: String?
+    /// Wether the pill should be highlighted
+    var isHighlighted: Bool
+    /// Alpha for pill display
+    var alpha: CGFloat
+
+    /// Helper for preferred text to display.
+    var displayText: String {
+        guard let displayName = displayName,
+              displayName.count > 0 else {
+            return matrixItemId
+        }
+
+        return displayName
+    }
+}