Add timeline properties for edited and reactions.

Not yet visible, waiting for timeline API.

ElementX/Sources/Services/Timeline/TimelineItems/Items/EmoteRoomTimelineItem.swift

@@ -28,4 +28,6 @@ struct EmoteRoomTimelineItem: EventBasedTimelineItemProtocol, Identifiable, Equa
     let senderId: String
     var senderDisplayName: String?
     var senderAvatar: UIImage?
+    
+    let properties: RoomTimelineItemProperties
 }

ElementX/Sources/Services/Timeline/TimelineItems/Items/ImageRoomTimelineItem.swift

@@ -35,4 +35,6 @@ struct ImageRoomTimelineItem: EventBasedTimelineItemProtocol, Identifiable, Equa
     var height: CGFloat?
     var aspectRatio: CGFloat?
     var blurhash: String?
+    
+    let properties: RoomTimelineItemProperties
 }

ElementX/Sources/Services/Timeline/TimelineItems/Items/NoticeRoomTimelineItem.swift

@@ -28,4 +28,6 @@ struct NoticeRoomTimelineItem: EventBasedTimelineItemProtocol, Identifiable, Equ
     let senderId: String
     var senderDisplayName: String?
     var senderAvatar: UIImage?
+    
+    let properties: RoomTimelineItemProperties
 }

ElementX/Sources/Services/Timeline/TimelineItems/Items/RoomTimelineItemProperties.swift

@@ -0,0 +1,25 @@
+//
+// 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
+
+/// Properties of a matrix event that are common between all timeline items.
+struct RoomTimelineItemProperties: Equatable {
+    /// Whether the item has been edited.
+    var isEdited = false
+    /// The aggregated reactions that have been sent for this item.
+    var reactions: [AggregatedReaction] = []
+}

ElementX/Sources/Services/Timeline/TimelineItems/Items/TextRoomTimelineItem.swift

@@ -28,4 +28,6 @@ struct TextRoomTimelineItem: EventBasedTimelineItemProtocol, Identifiable, Equat
     let senderId: String
     var senderDisplayName: String?
     var senderAvatar: UIImage?
+    
+    let properties: RoomTimelineItemProperties
 }