Add RoomMessagesAdapter.kt

app/src/main/java/chat/rocket/android/layouthelper/chatroom/list/RoomMessagesAdapter.kt

+package chat.rocket.android.layouthelper.chatroom.list
+
+import android.content.Context
+import android.support.v7.widget.RecyclerView
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import chat.rocket.android.R
+import chat.rocket.android.helper.DateTime
+import chat.rocket.android.widget.RocketChatAvatar
+import chat.rocket.android.widget.helper.UserAvatarHelper
+import chat.rocket.android.widget.message.RocketChatMessageLayout
+import chat.rocket.core.models.Message
+import kotlinx.android.synthetic.main.item_room_message.view.*
+import kotlinx.android.synthetic.main.day.view.*
+
+class RoomMessagesAdapter(private val dataSet: List<Message>, private val hostname: String, private val context: Context) : RecyclerView.Adapter<RoomMessagesAdapter.ViewHolder>() {
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        val view = LayoutInflater.from(parent.context).inflate(R.layout.item_room_message, parent, false)
+        return ViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        val message = dataSet[position]
+
+        holder.newDay.text = DateTime.fromEpocMs(message.timestamp, DateTime.Format.DATE)
+
+        val username = message.user?.username
+        if (username != null) {
+            val placeholderDrawable = UserAvatarHelper.getTextDrawable(username, holder.userAvatar.context)
+            holder.userAvatar.loadImage(UserAvatarHelper.getUri(hostname, username), placeholderDrawable)
+            holder.username.text = context.getString(R.string.username, username)
+        } else {
+            holder.userAvatar.visibility = View.GONE
+            holder.username.visibility = View.GONE
+        }
+
+        holder.messageBody.setText(message.message)
+    }
+
+    override fun getItemCount(): Int = dataSet.size
+
+    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+        val newDay: TextView = itemView.day
+        val userAvatar: RocketChatAvatar = itemView.userAvatar
+        val username: TextView = itemView.username
+        val messageBody: RocketChatMessageLayout = itemView.messageBody
+    }
+}
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