messenger-android

Android graphical user interfaces for GNUnet Messenger
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ChatMessageAdapter.kt (4888B)

      1 /*
      2    This file is part of GNUnet.
      3    Copyright (C) 2021--2025 GNUnet e.V.
      4 
      5    GNUnet is free software: you can redistribute it and/or modify it
      6    under the terms of the GNU Affero General Public License as published
      7    by the Free Software Foundation, either version 3 of the License,
      8    or (at your option) any later version.
      9 
     10    GNUnet is distributed in the hope that it will be useful, but
     11    WITHOUT ANY WARRANTY; without even the implied warranty of
     12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13    Affero General Public License for more details.
     14 
     15    You should have received a copy of the GNU Affero General Public License
     16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
     17 
     18    SPDX-License-Identifier: AGPL3.0-or-later
     19  */
     20 /*
     21  * @author t3sserakt
     22  * @file GNUnetMessenger/app/src/main/java/org/gnunet/gnunetmessenger/ui/adapters/ChatMessageAdapter.kt
     23  */
     24 
     25 
     26 package org.gnunet.gnunetmessenger.ui.adapters
     27 
     28 
     29 
     30 import android.view.LayoutInflater
     31 import android.view.View
     32 import android.view.ViewGroup
     33 import android.widget.TextView
     34 import androidx.recyclerview.widget.DiffUtil
     35 import androidx.recyclerview.widget.ListAdapter
     36 import androidx.recyclerview.widget.RecyclerView
     37 import org.gnunet.gnunetmessenger.R
     38 import org.gnunet.gnunetmessenger.model.ChatMessage
     39 import org.gnunet.gnunetmessenger.model.ChatMessageType
     40 import java.text.SimpleDateFormat
     41 import java.util.Locale
     42 import java.util.Date
     43 
     44 class ChatMessageAdapter : ListAdapter<ChatMessage, RecyclerView.ViewHolder>(DiffCallback()) {
     45 
     46     companion object {
     47         private const val VIEW_TYPE_OWN = 1
     48         private const val VIEW_TYPE_OTHER = 2
     49         private const val VIEW_TYPE_SYSTEM = 3
     50     }
     51 
     52     override fun getItemViewType(position: Int): Int {
     53         return when (getItem(position).type) {
     54             ChatMessageType.OWN -> VIEW_TYPE_OWN
     55             ChatMessageType.OTHER -> VIEW_TYPE_OTHER
     56             ChatMessageType.SYSTEM -> VIEW_TYPE_SYSTEM
     57             else -> VIEW_TYPE_SYSTEM
     58         }
     59     }
     60 
     61     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
     62         val inflater = LayoutInflater.from(parent.context)
     63         return when (viewType) {
     64             VIEW_TYPE_OWN -> {
     65                 val view = inflater.inflate(R.layout.item_message_own, parent, false)
     66                 OwnMessageViewHolder(view)
     67             }
     68             VIEW_TYPE_OTHER -> {
     69                 val view = inflater.inflate(R.layout.item_message_other, parent, false)
     70                 OtherMessageViewHolder(view)
     71             }
     72             VIEW_TYPE_SYSTEM -> {
     73                 val view = inflater.inflate(R.layout.item_message_system, parent, false)
     74                 SystemMessageViewHolder(view)
     75             }
     76             else -> throw IllegalArgumentException("Unknown view type $viewType")
     77         }
     78     }
     79 
     80     override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
     81         val message = getItem(position)
     82         when (holder) {
     83             is OwnMessageViewHolder -> holder.bind(message)
     84             is OtherMessageViewHolder -> holder.bind(message)
     85             is SystemMessageViewHolder -> holder.bind(message)
     86         }
     87     }
     88 
     89     class OwnMessageViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
     90         fun bind(message: ChatMessage) {
     91             itemView.findViewById<TextView>(R.id.messageText).text = message.text
     92             itemView.findViewById<TextView>(R.id.timestamp).text = formatTime(message.timestamp)
     93         }
     94     }
     95 
     96     class OtherMessageViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
     97         fun bind(message: ChatMessage) {
     98             itemView.findViewById<TextView>(R.id.messageText).text = message.text
     99             itemView.findViewById<TextView>(R.id.senderName).text = message.sender?.name
    100             itemView.findViewById<TextView>(R.id.timestamp).text = formatTime(message.timestamp)
    101         }
    102     }
    103 
    104     class SystemMessageViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
    105         fun bind(message: ChatMessage) {
    106             itemView.findViewById<TextView>(R.id.messageText).text = message.text
    107             itemView.findViewById<TextView>(R.id.timestamp).text = formatTime(message.timestamp)
    108         }
    109     }
    110 
    111     class DiffCallback : DiffUtil.ItemCallback<ChatMessage>() {
    112         override fun areItemsTheSame(oldItem: ChatMessage, newItem: ChatMessage): Boolean {
    113             return oldItem.text == newItem.text &&
    114                     oldItem.sender == newItem.sender &&
    115                     oldItem.timestamp == newItem.timestamp
    116         }
    117 
    118         override fun areContentsTheSame(oldItem: ChatMessage, newItem: ChatMessage): Boolean {
    119             return oldItem == newItem
    120         }
    121     }
    122 }
    123 
    124 fun formatTime(timestamp: Long): String {
    125     val sdf = SimpleDateFormat("HH:mm", Locale.getDefault())
    126     return sdf.format(Date(timestamp))
    127 }