Update RoomListFragment.kt

app/src/main/java/chat/rocket/android/fragment/chatroom/list/RoomListFragment.kt

@@ -3,26 +3,23 @@ package chat.rocket.android.fragment.chatroom.list
 import android.os.Bundle
 import android.support.v4.app.Fragment
 import android.support.v7.widget.LinearLayoutManager
+import android.support.v7.widget.RecyclerView
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import chat.rocket.android.R
-import chat.rocket.android.layouthelper.chatroom.list.RoomFileListAdapter
+import chat.rocket.android.helper.EndlessRecyclerViewScrollListener
 import chat.rocket.android.layouthelper.chatroom.list.RoomMemberListAdapter
 import chat.rocket.android.layouthelper.chatroom.list.RoomMessagesAdapter
 import chat.rocket.core.models.Message
 import chat.rocket.core.models.User
 import kotlinx.android.synthetic.main.fragment_room_list.*
+import java.util.*
 
+/**
+ * Created by Filipe de Lima Brito (filipedelimabrito@gmail.com) on 9/22/17.
+ */
 class RoomListFragment : Fragment(), RoomListContract.View {
-    var actionId: Int = 0
-    lateinit var roomId: String
-    lateinit var roomType: String
-    lateinit var hostname: String
-    lateinit var token: String
-    lateinit var userId: String
-    lateinit var presenter: RoomListPresenter
-    var isDataRequested: Boolean = false
 
     companion object {
         fun newInstance(actionId: Int,
@@ -48,6 +45,7 @@ class RoomListFragment : Fragment(), RoomListContract.View {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        activity.title = ""
         actionId = arguments.getInt("actionId")
         roomId = arguments.getString("roomId")
         roomType = arguments.getString("roomType")
@@ -66,28 +64,28 @@ class RoomListFragment : Fragment(), RoomListContract.View {
     override fun onResume() {
         super.onResume()
         if (!isDataRequested) {
-            requestData()
+            requestData(0)
             isDataRequested = true
         }
     }
 
-    private fun requestData() {
+    private fun requestData(offset: Int) {
         when (actionId) {
             R.id.action_pinned_messages -> {
-                activity.title = getString(R.string.fragment_room_list_pinned_message_title)
                 presenter.requestPinnedMessages(roomId,
                         roomType,
                         hostname,
                         token,
-                        userId)
+                        userId,
+                        offset)
             }
             R.id.action_favorite_messages -> {
-                activity.title = getString(R.string.fragment_room_list_favorite_message_title)
                 presenter.requestFavoriteMessages(roomId,
                         roomType,
                         hostname,
                         token,
-                        userId)
+                        userId,
+                        offset)
             }
 //            R.id.action_file_list -> {
 //                activity.title = getString(R.string.fragment_room_list_file_list_title)
@@ -98,60 +96,96 @@ class RoomListFragment : Fragment(), RoomListContract.View {
 //                        userId)
 //            }
             R.id.action_member_list -> {
-                activity.title = getString(R.string.fragment_room_list_member_list_title)
                 presenter.requestMemberList(roomId,
                         roomType,
                         hostname,
                         token,
-                        userId)
+                        userId,
+                        offset)
             }
         }
     }
 
-    override fun showPinnedMessages(dataSet: ArrayList<Message>) {
-        waitingView.visibility = View.GONE
-        if (dataSet.isEmpty()) {
-            showMessage(getString(R.string.fragment_room_list_no_pinned_message_to_show))
-        } else {
+    override fun showPinnedMessages(dataSet: ArrayList<Message>, total: String) {
+        activity.title = getString(R.string.fragment_room_list_pinned_message_title, total)
+        if (recyclerView.adapter == null) {
             recyclerView.adapter = RoomMessagesAdapter(dataSet, hostname, context)
-            recyclerView.layoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
+            val linearLayoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
+            recyclerView.layoutManager = linearLayoutManager
+            if (dataSet.size >= 50) {
+                recyclerView.addOnScrollListener(object : EndlessRecyclerViewScrollListener(linearLayoutManager) {
+                    override fun onLoadMore(page: Int, totalItemsCount: Int, recyclerView: RecyclerView?) {
+                        loadNextDataFromApi(page)
                     }
+                })
             }
-
-    override fun showFavoriteMessages(dataSet: ArrayList<Message>) {
-        if (dataSet.isEmpty()) {
-            showMessage(getString(R.string.fragment_room_list_no_favorite_message_to_show))
         } else {
-            waitingView.visibility = View.GONE
-            recyclerView.adapter = RoomMessagesAdapter(dataSet, hostname, context)
-            recyclerView.layoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
+            (recyclerView.adapter as RoomMessagesAdapter).setDataSet(dataSet)
         }
     }
 
-    override fun showFileList(dataSet: ArrayList<String>) {
-        if (dataSet.isEmpty()) {
-            showMessage(getString(R.string.fragment_room_list_no_file_list_to_show))
+    override fun showFavoriteMessages(dataSet: ArrayList<Message>, total: String) {
+        activity.title = getString(R.string.fragment_room_list_favorite_message_title, total)
+        if (recyclerView.adapter == null) {
+            recyclerView.adapter = RoomMessagesAdapter(dataSet, hostname, context)
+            val linearLayoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
+            recyclerView.layoutManager = linearLayoutManager
+            if (dataSet.size >= 50) {
+                recyclerView.addOnScrollListener(object : EndlessRecyclerViewScrollListener(linearLayoutManager) {
+                    override fun onLoadMore(page: Int, totalItemsCount: Int, recyclerView: RecyclerView?) {
+                        loadNextDataFromApi(page)
+                    }
+                })
+            }
         } else {
-            waitingView.visibility = View.GONE
-            recyclerView.adapter = RoomFileListAdapter(dataSet)
-            recyclerView.layoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
+            (recyclerView.adapter as RoomMessagesAdapter).setDataSet(dataSet)
         }
     }
 
+    // TODO (after REST api fixes)
+    override fun showFileList(dataSet: ArrayList<String>, total: String) {}
+
     override fun showMemberList(dataSet: ArrayList<User>, total: String) {
-        if (dataSet.isEmpty()) {
-            showMessage(getString(R.string.fragment_room_list_no_member_list_to_show))
-        } else {
-            waitingView.visibility = View.GONE
-            activity.title = getString(R.string.fragment_room_list_member_list_title) + " (" + total + ")"
+        activity.title = getString(R.string.fragment_room_list_member_list_title, total)
+        if (recyclerView.adapter == null) {
             recyclerView.adapter = RoomMemberListAdapter(dataSet, hostname, context)
-            recyclerView.layoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
+            val linearLayoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
+            recyclerView.layoutManager = linearLayoutManager
+            if (dataSet.size >= 50) {
+                recyclerView.addOnScrollListener(object : EndlessRecyclerViewScrollListener(linearLayoutManager) {
+                    override fun onLoadMore(page: Int, totalItemsCount: Int, recyclerView: RecyclerView?) {
+                        loadNextDataFromApi(page)
+                    }
+                })
+            }
+        } else {
+            (recyclerView.adapter as RoomMemberListAdapter).setDataSet(dataSet)
         }
     }
 
     override fun showMessage(message: String) {
-        waitingView.visibility = View.GONE
         messageText.text = message
         messageText.visibility = View.VISIBLE
     }
+
+    override fun showWaitingView(shouldShow: Boolean) {
+        if (shouldShow) {
+            waitingView.visibility = View.VISIBLE
+        } else {
+            waitingView.visibility = View.GONE
+        }
+    }
+
+    private fun loadNextDataFromApi(page: Int) {
+        requestData(page * 50)
+    }
+
+    private var actionId: Int = 0
+    private lateinit var roomId: String
+    private lateinit var roomType: String
+    private lateinit var hostname: String
+    private lateinit var token: String
+    private lateinit var userId: String
+    private lateinit var presenter: RoomListPresenter
+    private var isDataRequested: Boolean = false
 }
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