Add bottom sheet adapters implementation

app/src/main/java/chat/rocket/android/chatroom/ui/ListBottomSheetAdapter.kt

+package chat.rocket.android.chatroom.ui
+
+import android.graphics.Color
+import android.support.annotation.ColorInt
+import android.support.annotation.IdRes
+import android.support.design.widget.BottomSheetDialog
+import android.support.v7.widget.LinearLayoutManager
+import android.support.v7.widget.RecyclerView
+import android.util.SparseIntArray
+import android.view.MenuItem
+import android.view.View
+import chat.rocket.android.R
+import ru.whalemare.sheetmenu.SheetMenu
+import ru.whalemare.sheetmenu.adapter.MenuAdapter
+
+open class ListBottomSheetAdapter(menuItems: List<MenuItem> = emptyList(), callback: MenuItem.OnMenuItemClickListener) :
+        MenuAdapter(menuItems = menuItems, callback = callback, itemLayoutId = R.layout.item_linear, showIcons = true) {
+
+    protected val textColors: SparseIntArray = SparseIntArray(menuItems.size)
+
+    init {
+        for (item in menuItems) {
+            textColors.put(item.itemId, Color.BLACK)
+        }
+    }
+
+    /**
+     * Hide a menu item and disable it.
+     *
+     * @param itemId The id of the menu item to disable and hide.
+     */
+    fun hideMenuItem(@IdRes itemId: Int) {
+        val item = menuItems.firstOrNull { it.itemId == itemId }
+        item?.apply {
+            setVisible(false)
+            setEnabled(false)
+        }
+    }
+
+    /**
+     * Show a menu item and enable it.
+     *
+     * @param itemId The id of the menu item to enable and show.
+     */
+    fun showMenuItem(@IdRes itemId: Int) {
+        val item = menuItems.firstOrNull { it.itemId == itemId }
+        item?.apply {
+            setVisible(true)
+            setEnabled(true)
+        }
+    }
+
+    fun setMenuItemTextColor(@IdRes itemId: Int, @ColorInt color: Int) {
+        val itemIndex = menuItems.indexOfFirst { it.itemId == itemId }
+        if (itemIndex > -1) {
+            textColors.put(itemId, color)
+        }
+    }
+}
+
+class ActionListAdapter(menuItems: List<MenuItem> = emptyList(), callback: MenuItem.OnMenuItemClickListener) :
+        ListBottomSheetAdapter(menuItems = menuItems, callback = callback) {
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        val item = menuItems[position]
+
+        if (showIcons) {
+            if (item.icon == null) {
+                holder.imageIcon.visibility = View.GONE
+            } else {
+                holder.imageIcon.visibility = View.VISIBLE
+            }
+        } else {
+            holder.imageIcon.visibility = View.GONE
+        }
+
+        holder.imageIcon.setImageDrawable(item.icon)
+        holder.textTitle.text = item.title
+        holder.itemView.setOnClickListener {
+            callback?.onMenuItemClick(item)
+        }
+        val color = if (item.itemId == R.id.action_menu_msg_delete) Color.RED else textColors.get(item.itemId)
+        holder.textTitle.setTextColor(color)
+    }
+}
+
+class BottomSheetMenu(adapter: MenuAdapter) : SheetMenu(adapter = adapter) {
+
+    override fun processRecycler(recycler: RecyclerView, dialog: BottomSheetDialog) {
+        if (layoutManager == null) {
+            layoutManager = LinearLayoutManager(recycler.context, LinearLayoutManager.VERTICAL, false)
+        }
+
+        val callback = adapter?.callback
+        adapter?.callback = MenuItem.OnMenuItemClickListener {
+            callback?.onMenuItemClick(it)
+            dialog.cancel()
+            true
+        }
+
+        recycler.adapter = adapter
+        recycler.layoutManager = layoutManager
+    }
+}
+
+
+