Iterate on reactions (#668)

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/timeline/item/event/EventReaction.kt

@@ -16,7 +16,10 @@
 
 package io.element.android.libraries.matrix.api.timeline.item.event
 
+import io.element.android.libraries.matrix.api.core.UserId
+
 data class EventReaction(
     val key: String,
-    val count: Long
+    val count: Long,
+    val senderIds: List<UserId>
 )

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/timeline/item/event/EventTimelineItemMapper.kt

@@ -78,7 +78,8 @@ private fun List<Reaction>?.map(): List<EventReaction> {
     return this?.map {
         EventReaction(
             key = it.key,
-            count = it.count.toLong()
+            count = it.count.toLong(),
+            senderIds = it.senders.map { sender -> UserId(sender) }
         )
     } ?: emptyList()
 }