talk-android/app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt

/*
 * Nextcloud Talk application
 *
 * @author Mario Danic
 * @author Marcel Hibbe
 * @author Andy Scherzinger
 * @author Tim Krüger
 * Copyright (C) 2021 Tim Krüger <t@timkrueger.me>
 * Copyright (C) 2021 Andy Scherzinger <info@andy-scherzinger.de>
 * Copyright (C) 2021 Marcel Hibbe <dev@mhibbe.de>
 * Copyright (C) 2017-2019 Mario Danic <mario@lovelyhq.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.nextcloud.talk.controllers

import android.Manifest
import android.annotation.SuppressLint
import android.app.Activity.RESULT_OK
import android.content.ClipData
import android.content.ClipboardManager
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.content.res.AssetFileDescriptor
import android.content.res.Resources
import android.database.Cursor
import android.graphics.Bitmap
import android.graphics.drawable.ColorDrawable
import android.media.MediaPlayer
import android.media.MediaRecorder
import android.net.Uri
import android.os.Build
import android.os.Build.VERSION_CODES.O
import android.os.Bundle
import android.os.Handler
import android.os.Parcelable
import android.os.SystemClock
import android.os.VibrationEffect
import android.os.Vibrator
import android.provider.ContactsContract
import android.provider.MediaStore
import android.text.Editable
import android.text.InputFilter
import android.text.TextUtils
import android.text.TextWatcher
import android.util.Log
import android.util.TypedValue
import android.view.Gravity
import android.view.Menu
import android.view.MenuInflater
import android.view.MenuItem
import android.view.MotionEvent
import android.view.View
import android.view.animation.AlphaAnimation
import android.view.animation.Animation
import android.view.animation.LinearInterpolator
import android.widget.AbsListView
import android.widget.ImageButton
import android.widget.ImageView
import android.widget.PopupMenu
import android.widget.RelativeLayout
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.view.ContextThemeWrapper
import androidx.core.content.ContextCompat
import androidx.core.content.FileProvider
import androidx.core.content.PermissionChecker
import androidx.core.graphics.drawable.RoundedBitmapDrawableFactory
import androidx.core.widget.doAfterTextChanged
import androidx.emoji.text.EmojiCompat
import androidx.emoji.widget.EmojiTextView
import androidx.recyclerview.widget.ItemTouchHelper
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import androidx.work.Data
import androidx.work.OneTimeWorkRequest
import androidx.work.WorkInfo
import androidx.work.WorkManager
import autodagger.AutoInjector
import coil.load
import com.bluelinelabs.conductor.RouterTransaction
import com.bluelinelabs.conductor.changehandler.HorizontalChangeHandler
import com.facebook.common.executors.UiThreadImmediateExecutorService
import com.facebook.common.references.CloseableReference
import com.facebook.datasource.DataSource
import com.facebook.drawee.backends.pipeline.Fresco
import com.facebook.imagepipeline.datasource.BaseBitmapDataSubscriber
import com.facebook.imagepipeline.image.CloseableImage
import com.google.android.flexbox.FlexboxLayout
import com.google.android.material.dialog.MaterialAlertDialogBuilder
import com.nextcloud.talk.BuildConfig
import com.nextcloud.talk.R
import com.nextcloud.talk.activities.CallActivity
import com.nextcloud.talk.activities.MainActivity
import com.nextcloud.talk.activities.TakePhotoActivity
import com.nextcloud.talk.adapters.messages.IncomingLocationMessageViewHolder
import com.nextcloud.talk.adapters.messages.IncomingPollMessageViewHolder
import com.nextcloud.talk.adapters.messages.IncomingPreviewMessageViewHolder
import com.nextcloud.talk.adapters.messages.IncomingVoiceMessageViewHolder
import com.nextcloud.talk.adapters.messages.MagicIncomingTextMessageViewHolder
import com.nextcloud.talk.adapters.messages.MagicOutcomingTextMessageViewHolder
import com.nextcloud.talk.adapters.messages.MagicSystemMessageViewHolder
import com.nextcloud.talk.adapters.messages.MagicUnreadNoticeMessageViewHolder
import com.nextcloud.talk.adapters.messages.MessagePayload
import com.nextcloud.talk.adapters.messages.OutcomingLocationMessageViewHolder
import com.nextcloud.talk.adapters.messages.OutcomingPollMessageViewHolder
import com.nextcloud.talk.adapters.messages.OutcomingPreviewMessageViewHolder
import com.nextcloud.talk.adapters.messages.OutcomingVoiceMessageViewHolder
import com.nextcloud.talk.adapters.messages.PreviewMessageInterface
import com.nextcloud.talk.adapters.messages.ReactionsInterface
import com.nextcloud.talk.adapters.messages.TalkMessagesListAdapter
import com.nextcloud.talk.adapters.messages.VoiceMessageInterface
import com.nextcloud.talk.api.NcApi
import com.nextcloud.talk.application.NextcloudTalkApplication
import com.nextcloud.talk.callbacks.MentionAutocompleteCallback
import com.nextcloud.talk.controllers.base.BaseController
import com.nextcloud.talk.controllers.util.viewBinding
import com.nextcloud.talk.data.user.model.User
import com.nextcloud.talk.databinding.ControllerChatBinding
import com.nextcloud.talk.events.UserMentionClickEvent
import com.nextcloud.talk.events.WebSocketCommunicationEvent
import com.nextcloud.talk.jobs.DownloadFileToCacheWorker
import com.nextcloud.talk.jobs.ShareOperationWorker
import com.nextcloud.talk.jobs.UploadAndShareFilesWorker
import com.nextcloud.talk.messagesearch.MessageSearchActivity
import com.nextcloud.talk.models.json.chat.ChatMessage
import com.nextcloud.talk.models.json.chat.ChatOverall
import com.nextcloud.talk.models.json.chat.ChatOverallSingleMessage
import com.nextcloud.talk.models.json.chat.ReadStatus
import com.nextcloud.talk.models.json.conversations.Conversation
import com.nextcloud.talk.models.json.conversations.RoomOverall
import com.nextcloud.talk.models.json.conversations.RoomsOverall
import com.nextcloud.talk.models.json.generic.GenericOverall
import com.nextcloud.talk.models.json.mention.Mention
import com.nextcloud.talk.polls.ui.PollCreateDialogFragment
import com.nextcloud.talk.presenters.MentionAutocompletePresenter
import com.nextcloud.talk.remotefilebrowser.activities.RemoteFileBrowserActivity
import com.nextcloud.talk.shareditems.activities.SharedItemsActivity
import com.nextcloud.talk.ui.bottom.sheet.ProfileBottomSheet
import com.nextcloud.talk.ui.dialog.AttachmentDialog
import com.nextcloud.talk.ui.dialog.MessageActionsDialog
import com.nextcloud.talk.ui.dialog.ShowReactionsDialog
import com.nextcloud.talk.ui.recyclerview.MessageSwipeActions
import com.nextcloud.talk.ui.recyclerview.MessageSwipeCallback
import com.nextcloud.talk.utils.ApiUtils
import com.nextcloud.talk.utils.ParticipantPermissions
import com.nextcloud.talk.utils.ConductorRemapping
import com.nextcloud.talk.utils.ConductorRemapping.remapChatController
import com.nextcloud.talk.utils.ContactUtils
import com.nextcloud.talk.utils.DateUtils
import com.nextcloud.talk.utils.DisplayUtils
import com.nextcloud.talk.utils.FileUtils
import com.nextcloud.talk.utils.ImageEmojiEditText
import com.nextcloud.talk.utils.MagicCharPolicy
import com.nextcloud.talk.utils.NotificationUtils
import com.nextcloud.talk.utils.bundle.BundleKeys
import com.nextcloud.talk.utils.bundle.BundleKeys.KEY_ACTIVE_CONVERSATION
import com.nextcloud.talk.utils.bundle.BundleKeys.KEY_CONVERSATION_NAME
import com.nextcloud.talk.utils.bundle.BundleKeys.KEY_FILE_PATHS
import com.nextcloud.talk.utils.bundle.BundleKeys.KEY_INTERNAL_USER_ID
import com.nextcloud.talk.utils.bundle.BundleKeys.KEY_ROOM_ID
import com.nextcloud.talk.utils.bundle.BundleKeys.KEY_ROOM_TOKEN
import com.nextcloud.talk.utils.bundle.BundleKeys.KEY_USER_ENTITY
import com.nextcloud.talk.utils.database.user.CapabilitiesUtilNew
import com.nextcloud.talk.utils.permissions.PlatformPermissionUtil
import com.nextcloud.talk.utils.rx.DisposableSet
import com.nextcloud.talk.utils.singletons.ApplicationWideCurrentRoomHolder
import com.nextcloud.talk.utils.text.Spans
import com.nextcloud.talk.webrtc.MagicWebSocketInstance
import com.nextcloud.talk.webrtc.WebSocketConnectionHelper
import com.otaliastudios.autocomplete.Autocomplete
import com.stfalcon.chatkit.commons.ImageLoader
import com.stfalcon.chatkit.commons.models.IMessage
import com.stfalcon.chatkit.messages.MessageHolders
import com.stfalcon.chatkit.messages.MessageHolders.ContentChecker
import com.stfalcon.chatkit.messages.MessagesListAdapter
import com.stfalcon.chatkit.utils.DateFormatter
import com.vanniktech.emoji.EmojiPopup
import io.reactivex.Observer
import io.reactivex.android.schedulers.AndroidSchedulers
import io.reactivex.disposables.Disposable
import io.reactivex.schedulers.Schedulers
import kotlinx.android.synthetic.main.view_message_input.view.*
import org.greenrobot.eventbus.EventBus
import org.greenrobot.eventbus.Subscribe
import org.greenrobot.eventbus.ThreadMode
import org.parceler.Parcels
import retrofit2.HttpException
import retrofit2.Response
import java.io.File
import java.io.IOException
import java.net.HttpURLConnection
import java.text.SimpleDateFormat
import java.util.Date
import java.util.Locale
import java.util.Objects
import java.util.concurrent.ExecutionException
import javax.inject.Inject
import kotlin.math.roundToInt

@AutoInjector(NextcloudTalkApplication::class)
class ChatController(args: Bundle) :
    BaseController(
        R.layout.controller_chat,
        args
    ),
    MessagesListAdapter.OnLoadMoreListener,
    MessagesListAdapter.Formatter<Date>,
    MessagesListAdapter.OnMessageViewLongClickListener<IMessage>,
    ContentChecker<ChatMessage>,
    VoiceMessageInterface,
    ReactionsInterface,
    PreviewMessageInterface {

    private val binding: ControllerChatBinding by viewBinding(ControllerChatBinding::bind)

    @Inject
    lateinit var ncApi: NcApi

    @Inject
    lateinit var eventBus: EventBus

    @Inject
    lateinit var permissionUtil: PlatformPermissionUtil

    val disposables = DisposableSet()

    var roomToken: String? = null
    val conversationUser: User?
    private val roomPassword: String
    var credentials: String? = null
    var currentConversation: Conversation? = null
    var inConversation = false
    private var historyRead = false
    private var globalLastKnownFutureMessageId = -1
    private var globalLastKnownPastMessageId = -1
    var adapter: TalkMessagesListAdapter<ChatMessage>? = null
    private var mentionAutocomplete: Autocomplete<*>? = null
    var layoutManager: LinearLayoutManager? = null
    var pullChatMessagesPending = false
    private var lookingIntoFuture = false
    var newMessagesCount = 0
    var startCallFromNotification: Boolean? = null
    val roomId: String
    val voiceOnly: Boolean
    var isFirstMessagesProcessing = true
    private var emojiPopup: EmojiPopup? = null

    var myFirstMessage: CharSequence? = null
    var checkingLobbyStatus: Boolean = false

    private var conversationInfoMenuItem: MenuItem? = null
    private var conversationVoiceCallMenuItem: MenuItem? = null
    private var conversationVideoMenuItem: MenuItem? = null
    private var conversationSharedItemsItem: MenuItem? = null

    var magicWebSocketInstance: MagicWebSocketInstance? = null

    var lobbyTimerHandler: Handler? = null
    var pastPreconditionFailed = false
    var futurePreconditionFailed = false

    private val filesToUpload: MutableList<String> = ArrayList()
    private var sharedText: String
    var isVoiceRecordingInProgress: Boolean = false
    var currentVoiceRecordFile: String = ""

    private var recorder: MediaRecorder? = null

    var mediaPlayer: MediaPlayer? = null
    lateinit var mediaPlayerHandler: Handler
    private var currentlyPlayedVoiceMessage: ChatMessage? = null

    var hasChatPermission: Boolean = false

    private var videoURI: Uri? = null

    init {
        Log.d(TAG, "init ChatController: " + System.identityHashCode(this).toString())

        setHasOptionsMenu(true)
        NextcloudTalkApplication.sharedApplication!!.componentApplication.inject(this)

        this.conversationUser = args.getParcelable(KEY_USER_ENTITY)
        this.roomId = args.getString(KEY_ROOM_ID, "")
        this.roomToken = args.getString(KEY_ROOM_TOKEN, "")
        this.sharedText = args.getString(BundleKeys.KEY_SHARED_TEXT, "")

        Log.d(TAG, "   roomToken = $roomToken")
        if (roomToken.isNullOrEmpty()) {
            Log.d(TAG, "   roomToken was null or empty!")
        }

        if (args.containsKey(KEY_ACTIVE_CONVERSATION)) {
            this.currentConversation = Parcels.unwrap<Conversation>(args.getParcelable(KEY_ACTIVE_CONVERSATION))
        }

        this.roomPassword = args.getString(BundleKeys.KEY_CONVERSATION_PASSWORD, "")

        credentials = if (conversationUser?.userId == "?") {
            null
        } else {
            ApiUtils.getCredentials(conversationUser!!.username, conversationUser.token)
        }

        if (args.containsKey(BundleKeys.KEY_FROM_NOTIFICATION_START_CALL)) {
            this.startCallFromNotification = args.getBoolean(BundleKeys.KEY_FROM_NOTIFICATION_START_CALL)
        }

        this.voiceOnly = args.getBoolean(BundleKeys.KEY_CALL_VOICE_ONLY, false)
    }

    private fun getRoomInfo() {
        val shouldRepeat = CapabilitiesUtilNew.hasSpreedFeatureCapability(conversationUser, "webinary-lobby")
        if (shouldRepeat) {
            checkingLobbyStatus = true
        }

        if (conversationUser != null) {
            val apiVersion = ApiUtils.getConversationApiVersion(conversationUser, intArrayOf(ApiUtils.APIv4, 1))

            val startNanoTime = System.nanoTime()
            Log.d(TAG, "getRoomInfo - getRoom - calling: $startNanoTime")
            ncApi.getRoom(credentials, ApiUtils.getUrlForRoom(apiVersion, conversationUser.baseUrl, roomToken))
                ?.subscribeOn(Schedulers.io())
                ?.observeOn(AndroidSchedulers.mainThread())
                ?.subscribe(object : Observer<RoomOverall> {
                    override fun onSubscribe(d: Disposable) {
                        disposables.add(d)
                    }

                    @Suppress("Detekt.TooGenericExceptionCaught")
                    override fun onNext(roomOverall: RoomOverall) {
                        Log.d(TAG, "getRoomInfo - getRoom - got response: $startNanoTime")
                        currentConversation = roomOverall.ocs!!.data
                        Log.d(
                            TAG,
                            "getRoomInfo. token: " + currentConversation?.token +
                                " sessionId: " + currentConversation?.sessionId
                        )
                        loadAvatarForStatusBar()
                        setTitle()

                        hasChatPermission =
                            ParticipantPermissions(conversationUser, currentConversation!!).hasChatPermission()

                        try {
                            setupSwipeToReply()
                            setupMentionAutocomplete()
                            checkShowCallButtons()
                            checkShowMessageInputView()
                            checkLobbyState()

                            if (!inConversation) {
                                joinRoomWithPassword()
                            }
                        } catch (npe: NullPointerException) {
                            // view binding can be null
                            // since this is called asynchronously and UI might have been destroyed in the meantime
                            Log.i(TAG, "UI destroyed - view binding already gone")
                        }
                    }

                    override fun onError(e: Throwable) {
                        Log.e(TAG, "getRoomInfo - getRoom - ERROR", e)
                    }

                    override fun onComplete() {
                        Log.d(TAG, "getRoomInfo - getRoom - onComplete: $startNanoTime")
                        if (shouldRepeat) {
                            if (lobbyTimerHandler == null) {
                                lobbyTimerHandler = Handler()
                            }

                            lobbyTimerHandler?.postDelayed({ getRoomInfo() }, LOBBY_TIMER_DELAY)
                        }
                    }
                })
        }
    }

    private fun setupSwipeToReply() {
        if (hasChatPermission && !isReadOnlyConversation()) {
            val messageSwipeController = MessageSwipeCallback(
                activity!!,
                object : MessageSwipeActions {
                    override fun showReplyUI(position: Int) {
                        val chatMessage = adapter?.items?.get(position)?.item as ChatMessage?
                        replyToMessage(chatMessage)
                    }
                }
            )

            withNullableControllerViewBinding {
                val itemTouchHelper = ItemTouchHelper(messageSwipeController)
                itemTouchHelper.attachToRecyclerView(binding.messagesListView)
            }
        }
    }

    private fun handleFromNotification() {
        var apiVersion = 1
        // FIXME Can this be called for guests?
        if (conversationUser != null) {
            apiVersion = ApiUtils.getConversationApiVersion(conversationUser, intArrayOf(ApiUtils.APIv4, 1))
        }

        Log.d(TAG, "handleFromNotification - getRooms - calling")
        ncApi.getRooms(credentials, ApiUtils.getUrlForRooms(apiVersion, conversationUser?.baseUrl))
            ?.subscribeOn(Schedulers.io())?.observeOn(AndroidSchedulers.mainThread())
            ?.subscribe(object : Observer<RoomsOverall> {
                override fun onSubscribe(d: Disposable) {
                    disposables.add(d)
                }

                override fun onNext(roomsOverall: RoomsOverall) {
                    Log.d(TAG, "handleFromNotification - getRooms - got response")
                    for (conversation in roomsOverall.ocs!!.data!!) {
                        if (roomId == conversation.roomId) {
                            roomToken = conversation.token
                            currentConversation = conversation
                            setTitle()
                            getRoomInfo()
                            break
                        }
                    }
                }

                override fun onError(e: Throwable) {
                    Log.e(TAG, "handleFromNotification - getRooms - ERROR: ", e)
                }

                override fun onComplete() {
                    // unused atm
                }
            })
    }

    private fun loadAvatarForStatusBar() {
        if (isOneToOneConversation() && activity != null) {
            val imageRequest = DisplayUtils.getImageRequestForUrl(
                ApiUtils.getUrlForAvatar(
                    conversationUser?.baseUrl,
                    currentConversation?.name,
                    true
                ),
                conversationUser!!
            )

            val imagePipeline = Fresco.getImagePipeline()
            val dataSource = imagePipeline.fetchDecodedImage(imageRequest, null)

            dataSource.subscribe(
                object : BaseBitmapDataSubscriber() {
                    override fun onNewResultImpl(bitmap: Bitmap?) {
                        if (actionBar != null && bitmap != null && resources != null) {
                            val avatarSize = (actionBar?.height!! / TOOLBAR_AVATAR_RATIO).roundToInt()
                            if (avatarSize > 0) {
                                val bitmapResized = Bitmap.createScaledBitmap(bitmap, avatarSize, avatarSize, false)

                                val roundedBitmapDrawable =
                                    RoundedBitmapDrawableFactory.create(resources!!, bitmapResized)
                                roundedBitmapDrawable.isCircular = true
                                roundedBitmapDrawable.setAntiAlias(true)
                                actionBar?.setIcon(roundedBitmapDrawable)
                            } else {
                                Log.d(TAG, "loadAvatarForStatusBar avatarSize <= 0")
                            }
                        }
                    }

                    override fun onFailureImpl(dataSource: DataSource<CloseableReference<CloseableImage>>) {
                        // unused atm
                    }
                },
                UiThreadImmediateExecutorService.getInstance()
            )
        }
    }

    fun isOneToOneConversation() = currentConversation != null && currentConversation?.type != null &&
        currentConversation?.type == Conversation.ConversationType
        .ROOM_TYPE_ONE_TO_ONE_CALL

    @Suppress("Detekt.TooGenericExceptionCaught")
    override fun onViewBound(view: View) {
        Log.d(TAG, "onViewBound: " + System.identityHashCode(this).toString())
        actionBar?.show()
        var adapterWasNull = false

        if (adapter == null) {
            binding.progressBar.visibility = View.VISIBLE

            adapterWasNull = true

            val messageHolders = MessageHolders()
            val profileBottomSheet = ProfileBottomSheet(ncApi, conversationUser!!, router)

            val payload =
                MessagePayload(roomToken!!, currentConversation?.isParticipantOwnerOrModerator, profileBottomSheet)

            messageHolders.setIncomingTextConfig(
                MagicIncomingTextMessageViewHolder::class.java,
                R.layout.item_custom_incoming_text_message,
                payload
            )
            messageHolders.setOutcomingTextConfig(
                MagicOutcomingTextMessageViewHolder::class.java,
                R.layout.item_custom_outcoming_text_message
            )

            messageHolders.setIncomingImageConfig(
                IncomingPreviewMessageViewHolder::class.java,
                R.layout.item_custom_incoming_preview_message,
                payload
            )

            messageHolders.setOutcomingImageConfig(
                OutcomingPreviewMessageViewHolder::class.java,
                R.layout.item_custom_outcoming_preview_message
            )

            messageHolders.registerContentType(
                CONTENT_TYPE_SYSTEM_MESSAGE,
                MagicSystemMessageViewHolder::class.java,
                R.layout.item_system_message,
                MagicSystemMessageViewHolder::class.java,
                R.layout.item_system_message,
                this
            )

            messageHolders.registerContentType(
                CONTENT_TYPE_UNREAD_NOTICE_MESSAGE,
                MagicUnreadNoticeMessageViewHolder::class.java,
                R.layout.item_date_header,
                MagicUnreadNoticeMessageViewHolder::class.java,
                R.layout.item_date_header,
                this
            )

            messageHolders.registerContentType(
                CONTENT_TYPE_LOCATION,
                IncomingLocationMessageViewHolder::class.java,
                payload,
                R.layout.item_custom_incoming_location_message,
                OutcomingLocationMessageViewHolder::class.java,
                null,
                R.layout.item_custom_outcoming_location_message,
                this
            )

            messageHolders.registerContentType(
                CONTENT_TYPE_VOICE_MESSAGE,
                IncomingVoiceMessageViewHolder::class.java,
                payload,
                R.layout.item_custom_incoming_voice_message,
                OutcomingVoiceMessageViewHolder::class.java,
                null,
                R.layout.item_custom_outcoming_voice_message,
                this
            )

            messageHolders.registerContentType(
                CONTENT_TYPE_POLL,
                IncomingPollMessageViewHolder::class.java,
                payload,
                R.layout.item_custom_incoming_poll_message,
                OutcomingPollMessageViewHolder::class.java,
                payload,
                R.layout.item_custom_outcoming_poll_message,
                this
            )

            val senderId = if (!conversationUser.userId.equals("?")) {
                "users/" + conversationUser.userId
            } else {
                currentConversation?.actorType + "/" + currentConversation?.actorId
            }

            Log.d(TAG, "Initialize TalkMessagesListAdapter with senderId: $senderId")

            adapter = TalkMessagesListAdapter(
                senderId,
                messageHolders,
                ImageLoader { imageView, url, payload ->
                    val draweeController = Fresco.newDraweeControllerBuilder()
                        .setImageRequest(DisplayUtils.getImageRequestForUrl(url, conversationUser))
                        .setControllerListener(DisplayUtils.getImageControllerListener(imageView))
                        .setOldController(imageView.controller)
                        .setAutoPlayAnimations(true)
                        .build()
                    imageView.controller = draweeController
                },
                this
            )
        } else {
            binding.messagesListView.visibility = View.VISIBLE
        }

        binding.messagesListView.setAdapter(adapter)
        adapter?.setLoadMoreListener(this)
        adapter?.setDateHeadersFormatter { format(it) }
        adapter?.setOnMessageViewLongClickListener { view, message -> onMessageViewLongClick(view, message) }

        adapter?.registerViewClickListener(
            R.id.playPauseBtn
        ) { view, message ->
            val filename = message.selectedIndividualHashMap!!["name"]
            val file = File(context.cacheDir, filename!!)
            if (file.exists()) {
                if (message.isPlayingVoiceMessage) {
                    pausePlayback(message)
                } else {
                    startPlayback(message)
                }
            } else {
                downloadFileToCache(message)
            }
        }

        setupSwipeToReply()

        layoutManager = binding.messagesListView.layoutManager as LinearLayoutManager?

        binding.popupBubbleView.setRecyclerView(binding.messagesListView)

        binding.popupBubbleView.setPopupBubbleListener { context ->
            if (newMessagesCount != 0) {
                val scrollPosition = if (newMessagesCount - 1 < 0) {
                    0
                } else {
                    newMessagesCount - 1
                }
                Handler().postDelayed(
                    {
                        binding.messagesListView.smoothScrollToPosition(scrollPosition)
                    },
                    NEW_MESSAGES_POPUP_BUBBLE_DELAY
                )
            }
        }

        viewThemeUtils.material.colorMaterialButtonPrimaryFilled(binding.popupBubbleView)

        binding.messageInputView.setPadding(0, 0, 0, 0)

        binding.messagesListView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
            override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
                super.onScrollStateChanged(recyclerView, newState)

                if (newState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {
                    if (newMessagesCount != 0 && layoutManager != null) {
                        if (layoutManager!!.findFirstCompletelyVisibleItemPosition() < newMessagesCount) {
                            newMessagesCount = 0

                            if (binding.popupBubbleView.isShown) {
                                binding.popupBubbleView.hide()
                            }
                        }
                    }
                }
            }
        })

        val filters = arrayOfNulls<InputFilter>(1)
        val lengthFilter = CapabilitiesUtilNew.getMessageMaxLength(conversationUser)

        filters[0] = InputFilter.LengthFilter(lengthFilter)
        binding.messageInputView.inputEditText?.filters = filters

        binding.messageInputView.inputEditText?.addTextChangedListener(object : TextWatcher {
            override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {
                // unused atm
            }

            @Suppress("Detekt.TooGenericExceptionCaught")
            override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
                try {
                    if (s.length >= lengthFilter) {
                        binding.messageInputView.inputEditText?.error = String.format(
                            Objects.requireNonNull<Resources>(resources).getString(R.string.nc_limit_hit),
                            lengthFilter.toString()
                        )
                    } else {
                        binding.messageInputView.inputEditText?.error = null
                    }

                    val editable = binding.messageInputView.inputEditText?.editableText
                    if (editable != null && binding.messageInputView.inputEditText != null) {
                        val mentionSpans = editable.getSpans(
                            0,
                            binding.messageInputView.inputEditText!!.length(),
                            Spans.MentionChipSpan::class.java
                        )
                        var mentionSpan: Spans.MentionChipSpan
                        for (i in mentionSpans.indices) {
                            mentionSpan = mentionSpans[i]
                            if (start >= editable.getSpanStart(mentionSpan) &&
                                start < editable.getSpanEnd(mentionSpan)
                            ) {
                                if (editable.subSequence(
                                        editable.getSpanStart(mentionSpan),
                                        editable.getSpanEnd(mentionSpan)
                                    ).toString().trim { it <= ' ' } != mentionSpan.label
                                ) {
                                    editable.removeSpan(mentionSpan)
                                }
                            }
                        }
                    }
                } catch (npe: NullPointerException) {
                    // view binding can be null
                    // since this is called asynchronously and UI might have been destroyed in the meantime
                    Log.i(TAG, "UI destroyed - view binding already gone")
                }
            }

            override fun afterTextChanged(s: Editable) {
                // unused atm
            }
        })

        // Image keyboard support
        // See: https://developer.android.com/guide/topics/text/image-keyboard
        (binding.messageInputView.inputEditText as ImageEmojiEditText).onCommitContentListener = {
            uploadFile(it.toString(), false)
        }

        showMicrophoneButton(true)

        binding.messageInputView.messageInput.doAfterTextChanged {
            try {
                if (binding.messageInputView.messageInput.text.isEmpty()) {
                    showMicrophoneButton(true)
                } else {
                    showMicrophoneButton(false)
                }
            } catch (npe: NullPointerException) {
                // view binding can be null
                // since this is called asynchronously and UI might have been destroyed in the meantime
                Log.i(TAG, "UI destroyed - view binding already gone")
            }
        }

        var sliderInitX = 0F
        var downX = 0f
        var deltaX = 0f

        var voiceRecordStartTime = 0L
        var voiceRecordEndTime = 0L

        binding.messageInputView.recordAudioButton.setOnTouchListener(object : View.OnTouchListener {
            override fun onTouch(v: View?, event: MotionEvent?): Boolean {
                view.performClick()
                when (event?.action) {
                    MotionEvent.ACTION_DOWN -> {
                        if (!isRecordAudioPermissionGranted()) {
                            requestRecordAudioPermissions()
                            return true
                        }
                        if (!UploadAndShareFilesWorker.isStoragePermissionGranted(context)) {
                            UploadAndShareFilesWorker.requestStoragePermission(this@ChatController)
                            return true
                        }

                        voiceRecordStartTime = System.currentTimeMillis()

                        setVoiceRecordFileName()
                        startAudioRecording(currentVoiceRecordFile)
                        downX = event.x
                        showRecordAudioUi(true)
                    }
                    MotionEvent.ACTION_CANCEL -> {
                        Log.d(TAG, "ACTION_CANCEL. same as for UP")
                        if (!isVoiceRecordingInProgress || !isRecordAudioPermissionGranted()) {
                            return true
                        }

                        stopAndDiscardAudioRecording()
                        showRecordAudioUi(false)
                        binding.messageInputView.slideToCancelDescription.x = sliderInitX
                    }
                    MotionEvent.ACTION_UP -> {
                        Log.d(TAG, "ACTION_UP. stop recording??")
                        if (!isVoiceRecordingInProgress || !isRecordAudioPermissionGranted()) {
                            return true
                        }
                        showRecordAudioUi(false)

                        voiceRecordEndTime = System.currentTimeMillis()
                        val voiceRecordDuration = voiceRecordEndTime - voiceRecordStartTime
                        if (voiceRecordDuration < MINIMUM_VOICE_RECORD_DURATION) {
                            Log.d(TAG, "voiceRecordDuration: $voiceRecordDuration")
                            Toast.makeText(
                                context,
                                context.getString(R.string.nc_voice_message_hold_to_record_info),
                                Toast.LENGTH_SHORT
                            ).show()
                            stopAndDiscardAudioRecording()
                            return true
                        } else {
                            voiceRecordStartTime = 0L
                            voiceRecordEndTime = 0L
                            stopAndSendAudioRecording()
                        }

                        binding.messageInputView.slideToCancelDescription.x = sliderInitX
                    }
                    MotionEvent.ACTION_MOVE -> {
                        Log.d(TAG, "ACTION_MOVE.")

                        if (!isVoiceRecordingInProgress || !isRecordAudioPermissionGranted()) {
                            return true
                        }

                        showRecordAudioUi(true)

                        if (sliderInitX == 0.0F) {
                            sliderInitX = binding.messageInputView.slideToCancelDescription.x
                        }

                        val movedX: Float = event.x
                        deltaX = movedX - downX

                        // only allow slide to left
                        if (binding.messageInputView.slideToCancelDescription.x > sliderInitX) {
                            binding.messageInputView.slideToCancelDescription.x = sliderInitX
                        }

                        if (binding.messageInputView.slideToCancelDescription.x < VOICE_RECORD_CANCEL_SLIDER_X) {
                            Log.d(TAG, "stopping recording because slider was moved to left")
                            stopAndDiscardAudioRecording()
                            showRecordAudioUi(false)
                            binding.messageInputView.slideToCancelDescription.x = sliderInitX
                            return true
                        } else {
                            binding.messageInputView.slideToCancelDescription.x = binding.messageInputView
                                .slideToCancelDescription.x + deltaX
                            downX = movedX
                        }
                    }
                }

                return v?.onTouchEvent(event) ?: true
            }
        })

        binding.messageInputView.inputEditText?.setText(sharedText)
        binding.messageInputView.setAttachmentsListener {
            activity?.let { AttachmentDialog(it, this).show() }
        }

        binding.messageInputView.button.setOnClickListener { submitMessage(false) }

        if (CapabilitiesUtilNew.hasSpreedFeatureCapability(conversationUser, "silent-send")) {
            binding.messageInputView.button.setOnLongClickListener {
                showSendButtonMenu()
                true
            }
        }

        binding.messageInputView.button.contentDescription = resources?.getString(
            R.string
                .nc_description_send_message_button
        )

        viewThemeUtils.platform.colorImageView(binding.messageInputView.button)

        if (currentConversation != null && currentConversation?.roomId != null) {
            loadAvatarForStatusBar()
            setTitle()
        }

        if (adapterWasNull) {
            // we're starting
            if (TextUtils.isEmpty(roomToken)) {
                handleFromNotification()
            } else {
                getRoomInfo()
            }
        }
        super.onViewBound(view)
    }

    private fun showSendButtonMenu() {
        val popupMenu = PopupMenu(
            ContextThemeWrapper(view?.context, R.style.ChatSendButtonMenu),
            binding.messageInputView.button,
            Gravity.END
        )
        popupMenu.inflate(R.menu.chat_send_menu)

        popupMenu.setOnMenuItemClickListener { item: MenuItem ->
            when (item.itemId) {
                R.id.send_without_notification -> submitMessage(true)
            }
            true
        }

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            popupMenu.setForceShowIcon(true)
        }
        popupMenu.show()
    }

    private fun showCallButtonMenu(isVoiceOnlyCall: Boolean) {
        val anchor: View? = if (isVoiceOnlyCall) {
            activity?.findViewById(R.id.conversation_voice_call)
        } else {
            activity?.findViewById(R.id.conversation_video_call)
        }

        if (anchor != null) {
            val popupMenu = PopupMenu(
                ContextThemeWrapper(view?.context, R.style.CallButtonMenu),
                anchor,
                Gravity.END
            )
            popupMenu.inflate(R.menu.chat_call_menu)

            popupMenu.setOnMenuItemClickListener { item: MenuItem ->
                when (item.itemId) {
                    R.id.call_without_notification -> startACall(isVoiceOnlyCall, true)
                }
                true
            }

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                popupMenu.setForceShowIcon(true)
            }
            popupMenu.show()
        }
    }

    private fun startPlayback(message: ChatMessage) {
        if (!this.isAttached) {
            // don't begin to play voice message if screen is not visible anymore.
            // this situation might happen if file is downloading but user already left the chatview.
            // If user returns to chatview, the old chatview instance is not attached anymore
            // and he has to click the play button again (which is considered to be okay)
            return
        }

        initMediaPlayer(message)

        if (!mediaPlayer!!.isPlaying) {
            mediaPlayer!!.start()
        }

        mediaPlayerHandler = Handler()
        activity?.runOnUiThread(object : Runnable {
            override fun run() {
                if (mediaPlayer != null) {
                    val currentPosition: Int = mediaPlayer!!.currentPosition / VOICE_MESSAGE_SEEKBAR_BASE
                    message.voiceMessagePlayedSeconds = currentPosition
                    adapter?.update(message)
                }
                mediaPlayerHandler.postDelayed(this, SECOND)
            }
        })

        message.isDownloadingVoiceMessage = false
        message.isPlayingVoiceMessage = true
        adapter?.update(message)
    }

    private fun pausePlayback(message: ChatMessage) {
        if (mediaPlayer!!.isPlaying) {
            mediaPlayer!!.pause()
        }

        message.isPlayingVoiceMessage = false
        adapter?.update(message)
    }

    private fun initMediaPlayer(message: ChatMessage) {
        if (message != currentlyPlayedVoiceMessage) {
            currentlyPlayedVoiceMessage?.let { stopMediaPlayer(it) }
        }

        if (mediaPlayer == null) {
            val fileName = message.selectedIndividualHashMap!!["name"]
            val absolutePath = context.cacheDir.absolutePath + "/" + fileName
            mediaPlayer = MediaPlayer().apply {
                setDataSource(absolutePath)
                prepare()
            }
            currentlyPlayedVoiceMessage = message
            message.voiceMessageDuration = mediaPlayer!!.duration / VOICE_MESSAGE_SEEKBAR_BASE

            mediaPlayer!!.setOnCompletionListener {
                stopMediaPlayer(message)
            }
        } else {
            Log.e(TAG, "mediaPlayer was not null. This should not happen!")
        }
    }

    private fun stopMediaPlayer(message: ChatMessage) {
        message.isPlayingVoiceMessage = false
        message.resetVoiceMessage = true
        adapter?.update(message)

        currentlyPlayedVoiceMessage = null

        mediaPlayerHandler.removeCallbacksAndMessages(null)

        mediaPlayer?.stop()
        mediaPlayer?.release()
        mediaPlayer = null
    }

    override fun updateMediaPlayerProgressBySlider(messageWithSlidedProgress: ChatMessage, progress: Int) {
        if (mediaPlayer != null) {
            if (messageWithSlidedProgress == currentlyPlayedVoiceMessage) {
                mediaPlayer!!.seekTo(progress * VOICE_MESSAGE_SEEKBAR_BASE)
            }
        }
    }

    @SuppressLint("LongLogTag")
    private fun downloadFileToCache(message: ChatMessage) {
        message.isDownloadingVoiceMessage = true
        adapter?.update(message)

        val baseUrl = message.activeUser!!.baseUrl
        val userId = message.activeUser!!.userId
        val attachmentFolder = CapabilitiesUtilNew.getAttachmentFolder(message.activeUser!!)
        val fileName = message.selectedIndividualHashMap!!["name"]
        var size = message.selectedIndividualHashMap!!["size"]
        if (size == null) {
            size = "-1"
        }
        val fileSize = size.toLong()
        val fileId = message.selectedIndividualHashMap!!["id"]
        val path = message.selectedIndividualHashMap!!["path"]

        // check if download worker is already running
        val workers = WorkManager.getInstance(
            context
        ).getWorkInfosByTag(fileId!!)
        try {
            for (workInfo in workers.get()) {
                if (workInfo.state == WorkInfo.State.RUNNING || workInfo.state == WorkInfo.State.ENQUEUED) {
                    Log.d(TAG, "Download worker for $fileId is already running or scheduled")
                    return
                }
            }
        } catch (e: ExecutionException) {
            Log.e(TAG, "Error when checking if worker already exists", e)
        } catch (e: InterruptedException) {
            Log.e(TAG, "Error when checking if worker already exists", e)
        }

        val data: Data = Data.Builder()
            .putString(DownloadFileToCacheWorker.KEY_BASE_URL, baseUrl)
            .putString(DownloadFileToCacheWorker.KEY_USER_ID, userId)
            .putString(DownloadFileToCacheWorker.KEY_ATTACHMENT_FOLDER, attachmentFolder)
            .putString(DownloadFileToCacheWorker.KEY_FILE_NAME, fileName)
            .putString(DownloadFileToCacheWorker.KEY_FILE_PATH, path)
            .putLong(DownloadFileToCacheWorker.KEY_FILE_SIZE, fileSize)
            .build()

        val downloadWorker: OneTimeWorkRequest = OneTimeWorkRequest.Builder(DownloadFileToCacheWorker::class.java)
            .setInputData(data)
            .addTag(fileId)
            .build()

        WorkManager.getInstance().enqueue(downloadWorker)

        WorkManager.getInstance(context).getWorkInfoByIdLiveData(downloadWorker.id)
            .observeForever { workInfo: WorkInfo ->
                if (workInfo.state == WorkInfo.State.SUCCEEDED) {
                    startPlayback(message)
                }
            }
    }

    @SuppressLint("SimpleDateFormat")
    private fun setVoiceRecordFileName() {
        val simpleDateFormat = SimpleDateFormat(FILE_DATE_PATTERN)
        val date: String = simpleDateFormat.format(Date())

        val fileNameWithoutSuffix = String.format(
            context.resources.getString(R.string.nc_voice_message_filename),
            date,
            currentConversation!!.displayName
        )
        val fileName = fileNameWithoutSuffix + VOICE_MESSAGE_FILE_SUFFIX

        currentVoiceRecordFile = "${context.cacheDir.absolutePath}/$fileName"
    }

    private fun showRecordAudioUi(show: Boolean) {
        if (show) {
            binding.messageInputView.microphoneEnabledInfo.visibility = View.VISIBLE
            binding.messageInputView.microphoneEnabledInfoBackground.visibility = View.VISIBLE
            binding.messageInputView.audioRecordDuration.visibility = View.VISIBLE
            binding.messageInputView.slideToCancelDescription.visibility = View.VISIBLE
            binding.messageInputView.attachmentButton.visibility = View.GONE
            binding.messageInputView.smileyButton.visibility = View.GONE
            binding.messageInputView.messageInput.visibility = View.GONE
            binding.messageInputView.messageInput.hint = ""
        } else {
            binding.messageInputView.microphoneEnabledInfo.visibility = View.GONE
            binding.messageInputView.microphoneEnabledInfoBackground.visibility = View.GONE
            binding.messageInputView.audioRecordDuration.visibility = View.GONE
            binding.messageInputView.slideToCancelDescription.visibility = View.GONE
            binding.messageInputView.attachmentButton.visibility = View.VISIBLE
            binding.messageInputView.smileyButton.visibility = View.VISIBLE
            binding.messageInputView.messageInput.visibility = View.VISIBLE
            binding.messageInputView.messageInput.hint =
                context.resources?.getString(R.string.nc_hint_enter_a_message)
        }
    }

    private fun isRecordAudioPermissionGranted(): Boolean {
        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            return PermissionChecker.checkSelfPermission(
                context,
                Manifest.permission.RECORD_AUDIO
            ) == PermissionChecker.PERMISSION_GRANTED
        } else {
            true
        }
    }

    private fun startAudioRecording(file: String) {
        binding.messageInputView.audioRecordDuration.base = SystemClock.elapsedRealtime()
        binding.messageInputView.audioRecordDuration.start()

        val animation: Animation = AlphaAnimation(1.0f, 0.0f)
        animation.duration = ANIMATION_DURATION
        animation.interpolator = LinearInterpolator()
        animation.repeatCount = Animation.INFINITE
        animation.repeatMode = Animation.REVERSE
        binding.messageInputView.microphoneEnabledInfo.startAnimation(animation)

        recorder = MediaRecorder().apply {
            setAudioSource(MediaRecorder.AudioSource.MIC)
            setOutputFile(file)
            setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)
            setAudioEncoder(MediaRecorder.AudioEncoder.AAC)

            try {
                prepare()
            } catch (e: IOException) {
                Log.e(TAG, "prepare for audio recording failed")
            }

            try {
                start()
                isVoiceRecordingInProgress = true
            } catch (e: IllegalStateException) {
                Log.e(TAG, "start for audio recording failed")
            }

            vibrate()
        }
    }

    private fun stopAndSendAudioRecording() {
        stopAudioRecording()
        val uri = Uri.fromFile(File(currentVoiceRecordFile))
        uploadFile(uri.toString(), true)
    }

    private fun stopAndDiscardAudioRecording() {
        stopAudioRecording()

        val cachedFile = File(currentVoiceRecordFile)
        cachedFile.delete()
    }

    @Suppress("Detekt.TooGenericExceptionCaught")
    private fun stopAudioRecording() {
        binding.messageInputView.audioRecordDuration.stop()
        binding.messageInputView.microphoneEnabledInfo.clearAnimation()

        if (isVoiceRecordingInProgress) {
            recorder?.apply {
                try {
                    stop()
                    release()
                    isVoiceRecordingInProgress = false
                    Log.d(TAG, "stopped recorder. isVoiceRecordingInProgress = false")
                } catch (e: RuntimeException) {
                    Log.w(TAG, "error while stopping recorder!")
                }

                vibrate()
            }
            recorder = null
        } else {
            Log.e(TAG, "tried to stop audio recorder but it was not recording")
        }
    }

    fun vibrate() {
        val vibrator = context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
        if (Build.VERSION.SDK_INT >= O) {
            vibrator.vibrate(VibrationEffect.createOneShot(SHORT_VIBRATE, VibrationEffect.DEFAULT_AMPLITUDE))
        } else {
            vibrator.vibrate(SHORT_VIBRATE)
        }
    }

    private fun requestRecordAudioPermissions() {
        requestPermissions(
            arrayOf(
                Manifest.permission.RECORD_AUDIO
            ),
            REQUEST_RECORD_AUDIO_PERMISSION
        )
    }

    private fun requestCameraPermissions() {
        requestPermissions(
            arrayOf(
                Manifest.permission.CAMERA
            ),
            REQUEST_CAMERA_PERMISSION
        )
    }

    private fun requestReadContacts() {
        requestPermissions(
            arrayOf(
                Manifest.permission.READ_CONTACTS
            ),
            REQUEST_READ_CONTACT_PERMISSION
        )
    }

    private fun checkShowCallButtons() {
        if (isAlive()) {
            if (isReadOnlyConversation() || shouldShowLobby()) {
                disableCallButtons()
            } else {
                enableCallButtons()
            }
        }
    }

    private fun checkShowMessageInputView() {
        if (isAlive()) {
            if (isReadOnlyConversation() ||
                shouldShowLobby() ||
                !hasChatPermission
            ) {
                binding.messageInputView.visibility = View.GONE
            } else {
                binding.messageInputView.visibility = View.VISIBLE
            }
        }
    }

    private fun shouldShowLobby(): Boolean {
        if (currentConversation != null) {
            return currentConversation?.shouldShowLobby(conversationUser!!) == true
        }
        return false
    }

    private fun disableCallButtons() {
        if (CapabilitiesUtilNew.isAbleToCall(conversationUser)) {
            if (conversationVoiceCallMenuItem != null && conversationVideoMenuItem != null) {
                conversationVoiceCallMenuItem?.icon?.alpha = SEMI_TRANSPARENT_INT
                conversationVideoMenuItem?.icon?.alpha = SEMI_TRANSPARENT_INT
                conversationVoiceCallMenuItem?.isEnabled = false
                conversationVideoMenuItem?.isEnabled = false
            } else {
                Log.e(TAG, "call buttons were null when trying to disable them")
            }
        }
    }

    private fun enableCallButtons() {
        if (CapabilitiesUtilNew.isAbleToCall(conversationUser)) {
            if (conversationVoiceCallMenuItem != null && conversationVideoMenuItem != null) {
                conversationVoiceCallMenuItem?.icon?.alpha = FULLY_OPAQUE_INT
                conversationVideoMenuItem?.icon?.alpha = FULLY_OPAQUE_INT
                conversationVoiceCallMenuItem?.isEnabled = true
                conversationVideoMenuItem?.isEnabled = true
            } else {
                Log.e(TAG, "call buttons were null when trying to enable them")
            }
        }
    }

    private fun isReadOnlyConversation(): Boolean {
        return currentConversation?.conversationReadOnlyState != null &&
            currentConversation?.conversationReadOnlyState ==
            Conversation.ConversationReadOnlyState.CONVERSATION_READ_ONLY
    }

    private fun checkLobbyState() {
        if (currentConversation != null &&
            currentConversation?.isLobbyViewApplicable(conversationUser!!) ?: false &&
            isAlive()
        ) {
            if (!checkingLobbyStatus) {
                getRoomInfo()
            }

            if (currentConversation?.shouldShowLobby(conversationUser!!) ?: false) {
                binding.lobby.lobbyView.visibility = View.VISIBLE
                binding.messagesListView.visibility = View.GONE
                binding.messageInputView.visibility = View.GONE
                binding.progressBar.visibility = View.GONE

                val sb = StringBuilder()
                sb.append(resources!!.getText(R.string.nc_lobby_waiting))
                    .append("\n\n")

                if (currentConversation?.lobbyTimer != null && currentConversation?.lobbyTimer !=
                    0L
                ) {
                    val timestamp = currentConversation?.lobbyTimer ?: 0
                    val stringWithStartDate = String.format(
                        resources!!.getString(R.string.nc_lobby_start_date),
                        DateUtils.getLocalDateStringFromTimestampForLobby(timestamp)
                    )
                    val relativeTime = DateUtils.relativeStartTimeForLobby(timestamp, resources!!)

                    sb.append("$stringWithStartDate - $relativeTime")
                        .append("\n\n")
                }

                sb.append(currentConversation!!.description)
                binding.lobby.lobbyTextView.text = sb.toString()
            } else {
                binding.lobby.lobbyView.visibility = View.GONE
                binding.messagesListView.visibility = View.VISIBLE
                binding.messageInputView.inputEditText?.visibility = View.VISIBLE
                if (isFirstMessagesProcessing && pastPreconditionFailed) {
                    pastPreconditionFailed = false
                    pullChatMessages(0)
                } else if (futurePreconditionFailed) {
                    futurePreconditionFailed = false
                    pullChatMessages(1)
                }
            }
        } else {
            binding.lobby.lobbyView.visibility = View.GONE
            binding.messagesListView.visibility = View.VISIBLE
            binding.messageInputView.inputEditText?.visibility = View.VISIBLE
        }
    }

    @Throws(IllegalStateException::class)
    override fun onActivityResult(requestCode: Int, resultCode: Int, intent: Intent?) {
        if (resultCode != RESULT_OK && (requestCode != REQUEST_CODE_MESSAGE_SEARCH)) {
            Log.e(TAG, "resultCode for received intent was != ok")
            return
        }

        when (requestCode) {
            REQUEST_CODE_SELECT_REMOTE_FILES -> {
                val pathList = intent?.getStringArrayListExtra(RemoteFileBrowserActivity.EXTRA_SELECTED_PATHS)
                if (pathList?.size!! >= 1) {
                    pathList
                        .chunked(CHUNK_SIZE)
                        .forEach { paths ->
                            val data = Data.Builder()
                                .putLong(KEY_INTERNAL_USER_ID, conversationUser!!.id!!)
                                .putString(KEY_ROOM_TOKEN, roomToken)
                                .putStringArray(KEY_FILE_PATHS, paths.toTypedArray())
                                .build()
                            val worker = OneTimeWorkRequest.Builder(ShareOperationWorker::class.java)
                                .setInputData(data)
                                .build()
                            WorkManager.getInstance().enqueue(worker)
                        }
                }
            }
            REQUEST_CODE_CHOOSE_FILE -> {
                try {
                    checkNotNull(intent)
                    filesToUpload.clear()
                    intent.clipData?.let {
                        for (index in 0 until it.itemCount) {
                            filesToUpload.add(it.getItemAt(index).uri.toString())
                        }
                    } ?: run {
                        checkNotNull(intent.data)
                        intent.data.let {
                            filesToUpload.add(intent.data.toString())
                        }
                    }
                    require(filesToUpload.isNotEmpty())

                    val filenamesWithLineBreaks = StringBuilder("\n")

                    for (file in filesToUpload) {
                        val filename = FileUtils.getFileName(Uri.parse(file), context)
                        filenamesWithLineBreaks.append(filename).append("\n")
                    }

                    val confirmationQuestion = when (filesToUpload.size) {
                        1 -> context.resources?.getString(R.string.nc_upload_confirm_send_single)?.let {
                            String.format(it, title.trim())
                        }
                        else -> context.resources?.getString(R.string.nc_upload_confirm_send_multiple)?.let {
                            String.format(it, title.trim())
                        }
                    }

                    val materialAlertDialogBuilder = MaterialAlertDialogBuilder(binding.messageInputView.context)
                        .setTitle(confirmationQuestion)
                        .setMessage(filenamesWithLineBreaks.toString())
                        .setPositiveButton(R.string.nc_yes) { _, _ ->
                            if (UploadAndShareFilesWorker.isStoragePermissionGranted(context)) {
                                uploadFiles(filesToUpload)
                            } else {
                                UploadAndShareFilesWorker.requestStoragePermission(this)
                            }
                        }
                        .setNegativeButton(R.string.nc_no) { _, _ ->
                            // unused atm
                        }

                    viewThemeUtils.dialog.colorMaterialAlertDialogBackground(
                        binding.messageInputView.context,
                        materialAlertDialogBuilder
                    )

                    val dialog = materialAlertDialogBuilder.show()

                    viewThemeUtils.platform.colorTextButtons(
                        dialog.getButton(AlertDialog.BUTTON_POSITIVE),
                        dialog.getButton(AlertDialog.BUTTON_NEGATIVE)
                    )
                } catch (e: IllegalStateException) {
                    Toast.makeText(context, context.resources?.getString(R.string.nc_upload_failed), Toast.LENGTH_LONG)
                        .show()
                    Log.e(javaClass.simpleName, "Something went wrong when trying to upload file", e)
                } catch (e: IllegalArgumentException) {
                    Toast.makeText(context, context.resources?.getString(R.string.nc_upload_failed), Toast.LENGTH_LONG)
                        .show()
                    Log.e(javaClass.simpleName, "Something went wrong when trying to upload file", e)
                }
            }
            REQUEST_CODE_SELECT_CONTACT -> {
                val contactUri = intent?.data ?: return
                val cursor: Cursor? = activity?.contentResolver!!.query(contactUri, null, null, null, null)

                if (cursor != null && cursor.moveToFirst()) {
                    val id = cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.Contacts._ID))
                    val fileName = ContactUtils.getDisplayNameFromDeviceContact(context, id) + ".vcf"
                    val file = File(context.cacheDir, fileName)
                    writeContactToVcfFile(cursor, file)

                    val shareUri = FileProvider.getUriForFile(
                        activity!!,
                        BuildConfig.APPLICATION_ID,
                        File(file.absolutePath)
                    )
                    uploadFile(shareUri.toString(), false)
                }
                cursor?.close()
            }
            REQUEST_CODE_PICK_CAMERA -> {
                if (resultCode == RESULT_OK) {
                    try {
                        filesToUpload.clear()

                        if (intent != null && intent.data != null) {
                            run {
                                intent.data.let {
                                    filesToUpload.add(intent.data.toString())
                                }
                            }
                            require(filesToUpload.isNotEmpty())
                        } else if (videoURI != null) {
                            filesToUpload.add(videoURI.toString())
                            videoURI = null
                        } else {
                            throw IllegalStateException("Failed to get data from intent and uri")
                        }

                        if (UploadAndShareFilesWorker.isStoragePermissionGranted(context)) {
                            uploadFiles(filesToUpload)
                        } else {
                            UploadAndShareFilesWorker.requestStoragePermission(this)
                        }
                    } catch (e: IllegalStateException) {
                        Toast.makeText(
                            context,
                            context.resources?.getString(R.string.nc_upload_failed),
                            Toast.LENGTH_LONG
                        )
                            .show()
                        Log.e(javaClass.simpleName, "Something went wrong when trying to upload file", e)
                    } catch (e: IllegalArgumentException) {
                        Toast.makeText(
                            context,
                            context.resources?.getString(R.string.nc_upload_failed),
                            Toast.LENGTH_LONG
                        )
                            .show()
                        Log.e(javaClass.simpleName, "Something went wrong when trying to upload file", e)
                    }
                }
            }
            REQUEST_CODE_MESSAGE_SEARCH -> {
                val messageId = intent?.getStringExtra(MessageSearchActivity.RESULT_KEY_MESSAGE_ID)
                messageId?.let { id ->
                    scrollToMessageWithId(id)
                }
            }
        }
    }

    private fun scrollToMessageWithId(messageId: String) {
        val position = adapter?.items?.indexOfFirst {
            it.item is ChatMessage && (it.item as ChatMessage).id == messageId
        }
        if (position != null && position >= 0) {
            binding.messagesListView.smoothScrollToPosition(position)
        } else {
            // TODO show error that we don't have that message?
        }
    }

    private fun writeContactToVcfFile(cursor: Cursor, file: File) {
        val lookupKey = cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.Contacts.LOOKUP_KEY))
        val uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey)

        val fd: AssetFileDescriptor = activity?.contentResolver!!.openAssetFileDescriptor(uri, "r")!!
        fd.use {
            val fis = fd.createInputStream()

            file.createNewFile()
            fis.use { input ->
                file.outputStream().use { output ->
                    input.copyTo(output)
                }
            }
        }
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        if (requestCode == UploadAndShareFilesWorker.REQUEST_PERMISSION) {
            if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Log.d(ConversationsListController.TAG, "upload starting after permissions were granted")
                if (filesToUpload.isNotEmpty()) {
                    uploadFiles(filesToUpload)
                }
            } else {
                Toast
                    .makeText(context, context.getString(R.string.read_storage_no_permission), Toast.LENGTH_LONG)
                    .show()
            }
        } else if (requestCode == REQUEST_RECORD_AUDIO_PERMISSION) {
            if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                // do nothing. user will tap on the microphone again if he wants to record audio..
            } else {
                Toast.makeText(
                    context,
                    context.getString(R.string.nc_voice_message_missing_audio_permission),
                    Toast.LENGTH_LONG
                ).show()
            }
        } else if (requestCode == REQUEST_READ_CONTACT_PERMISSION) {
            if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                val intent = Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI)
                startActivityForResult(intent, REQUEST_CODE_SELECT_CONTACT)
            } else {
                Toast.makeText(
                    context,
                    context.getString(R.string.nc_share_contact_permission),
                    Toast.LENGTH_LONG
                ).show()
            }
        } else if (requestCode == REQUEST_CAMERA_PERMISSION) {
            if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Toast
                    .makeText(context, context.getString(R.string.camera_permission_granted), Toast.LENGTH_LONG)
                    .show()
            } else {
                Toast
                    .makeText(context, context.getString(R.string.take_photo_permission), Toast.LENGTH_LONG)
                    .show()
            }
        }
    }

    private fun uploadFiles(files: MutableList<String>) {
        for (file in files) {
            uploadFile(file, false)
        }
    }

    private fun uploadFile(fileUri: String, isVoiceMessage: Boolean) {
        var metaData = ""

        if (!hasChatPermission) {
            Log.w(TAG, "uploading file is forbidden because of missing attendee permissions")
            return
        }

        if (isVoiceMessage) {
            metaData = VOICE_MESSAGE_META_DATA
        }

        try {
            require(fileUri.isNotEmpty())
            UploadAndShareFilesWorker.upload(
                fileUri,
                roomToken!!,
                currentConversation?.displayName!!,
                metaData
            )
        } catch (e: IllegalArgumentException) {
            Toast.makeText(context, context.resources?.getString(R.string.nc_upload_failed), Toast.LENGTH_LONG).show()
            Log.e(javaClass.simpleName, "Something went wrong when trying to upload file", e)
        }
    }

    fun sendSelectLocalFileIntent() {
        val action = Intent(Intent.ACTION_OPEN_DOCUMENT).apply {
            type = "*/*"
            addCategory(Intent.CATEGORY_OPENABLE)
            putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true)
        }
        startActivityForResult(
            Intent.createChooser(
                action,
                context.resources?.getString(
                    R.string.nc_upload_choose_local_files
                )
            ),
            REQUEST_CODE_CHOOSE_FILE
        )
    }

    fun sendChooseContactIntent() {
        requestReadContacts()
    }

    fun showBrowserScreen() {
        val sharingFileBrowserIntent = Intent(activity, RemoteFileBrowserActivity::class.java)
        startActivityForResult(sharingFileBrowserIntent, REQUEST_CODE_SELECT_REMOTE_FILES)
    }

    fun showShareLocationScreen() {
        Log.d(TAG, "showShareLocationScreen")

        val bundle = Bundle()
        bundle.putString(KEY_ROOM_TOKEN, roomToken)
        router.pushController(
            RouterTransaction.with(LocationPickerController(bundle))
                .pushChangeHandler(HorizontalChangeHandler())
                .popChangeHandler(HorizontalChangeHandler())
        )
    }

    private fun showConversationInfoScreen() {
        val bundle = Bundle()
        bundle.putParcelable(BundleKeys.KEY_USER_ENTITY, conversationUser)
        bundle.putString(KEY_ROOM_TOKEN, roomToken)
        bundle.putBoolean(BundleKeys.KEY_ROOM_ONE_TO_ONE, isOneToOneConversation())
        router.pushController(
            RouterTransaction.with(ConversationInfoController(bundle))
                .pushChangeHandler(HorizontalChangeHandler())
                .popChangeHandler(HorizontalChangeHandler())
        )
    }

    private fun setupMentionAutocomplete() {
        if (isAlive()) {
            val elevation = MENTION_AUTO_COMPLETE_ELEVATION
            resources?.let {
                val backgroundDrawable = ColorDrawable(it.getColor(R.color.bg_default))
                val presenter = MentionAutocompletePresenter(activity, roomToken)
                val callback = MentionAutocompleteCallback(
                    activity,
                    conversationUser!!,
                    binding.messageInputView.inputEditText,
                    viewThemeUtils
                )

                if (mentionAutocomplete == null && binding.messageInputView.inputEditText != null) {
                    mentionAutocomplete = Autocomplete.on<Mention>(binding.messageInputView.inputEditText)
                        .with(elevation)
                        .with(backgroundDrawable)
                        .with(MagicCharPolicy('@'))
                        .with(presenter)
                        .with(callback)
                        .build()
                }
            }
        }
    }

    private fun validSessionId(): Boolean {
        return currentConversation != null &&
            !TextUtils.isEmpty(currentConversation?.sessionId) &&
            currentConversation?.sessionId != "0"
    }

    @Suppress("Detekt.TooGenericExceptionCaught")
    override fun onAttach(view: View) {
        super.onAttach(view)
        Log.d(
            TAG,
            "onAttach: Controller: " + System.identityHashCode(this).toString() +
                " Activity: " + System.identityHashCode(activity).toString()
        )
        eventBus.register(this)

        if (conversationUser?.userId != "?" &&
            CapabilitiesUtilNew.hasSpreedFeatureCapability(conversationUser, "mention-flag") &&
            activity != null
        ) {
            activity?.findViewById<View>(R.id.toolbar)?.setOnClickListener { v -> showConversationInfoScreen() }
        }

        ApplicationWideCurrentRoomHolder.getInstance().currentRoomId = roomId
        ApplicationWideCurrentRoomHolder.getInstance().currentRoomToken = roomToken
        ApplicationWideCurrentRoomHolder.getInstance().userInRoom = conversationUser

        val smileyButton = binding.messageInputView.findViewById<ImageButton>(R.id.smileyButton)

        emojiPopup = binding.messageInputView.inputEditText?.let {
            EmojiPopup(
                rootView = view,
                editText = it,
                onEmojiPopupShownListener = {
                    if (resources != null) {
                        smileyButton?.setImageDrawable(
                            ContextCompat.getDrawable(context, R.drawable.ic_baseline_keyboard_24)
                        )
                    }
                },
                onEmojiPopupDismissListener = {
                    smileyButton?.setImageDrawable(
                        ContextCompat.getDrawable(context, R.drawable.ic_insert_emoticon_black_24dp)
                    )
                },
                onEmojiClickListener = {
                    try {
                        binding.messageInputView.inputEditText?.editableText?.append(" ")
                    } catch (npe: NullPointerException) {
                        // view binding can be null
                        // since this is called asynchronously and UI might have been destroyed in the meantime
                        Log.i(WebViewLoginController.TAG, "UI destroyed - view binding already gone")
                    }
                }
            )
        }

        smileyButton?.setOnClickListener {
            emojiPopup?.toggle()
        }

        binding.messageInputView.findViewById<ImageButton>(R.id.cancelReplyButton)?.setOnClickListener {
            cancelReply()
        }

        viewThemeUtils.platform
            .themeImageButton(binding.messageInputView.findViewById<ImageButton>(R.id.cancelReplyButton))

        cancelNotificationsForCurrentConversation()

        Log.d(TAG, "onAttach inConversation: $inConversation")
        if (inConversation) {
            Log.d(TAG, "execute joinRoomWithPassword in onAttach")
            joinRoomWithPassword()
        }
    }

    private fun cancelReply() {
        binding.messageInputView.findViewById<RelativeLayout>(R.id.quotedChatMessageView)?.visibility = View.GONE
        binding.messageInputView.findViewById<ImageButton>(R.id.attachmentButton)?.visibility = View.VISIBLE
    }

    @Suppress("Detekt.TooGenericExceptionCaught")
    private fun cancelNotificationsForCurrentConversation() {
        if (conversationUser != null) {
            if (!TextUtils.isEmpty(roomToken)) {
                try {
                    NotificationUtils.cancelExistingNotificationsForRoom(
                        applicationContext,
                        conversationUser,
                        roomToken!!
                    )
                } catch (e: RuntimeException) {
                    Log.w(TAG, "Cancel notifications for current conversation results with an error.", e)
                }
            }
        }
    }

    override fun onDetach(view: View) {
        super.onDetach(view)
        Log.d(
            TAG,
            "onDetach: Controller: " + System.identityHashCode(this).toString() +
                " Activity: " + System.identityHashCode(activity).toString()
        )

        eventBus.unregister(this)

        if (activity != null) {
            activity?.findViewById<View>(R.id.toolbar)?.setOnClickListener(null)
        }

        checkingLobbyStatus = false

        if (lobbyTimerHandler != null) {
            lobbyTimerHandler?.removeCallbacksAndMessages(null)
        }

        if (conversationUser != null && isActivityNotChangingConfigurations() && isNotInCall()) {
            ApplicationWideCurrentRoomHolder.getInstance().clear()
            if (inConversation && validSessionId()) {
                leaveRoom()
            }
        }

        if (mentionAutocomplete != null && mentionAutocomplete!!.isPopupShowing) {
            mentionAutocomplete?.dismissPopup()
        }
    }

    private fun isActivityNotChangingConfigurations(): Boolean {
        return activity != null && !activity?.isChangingConfigurations!!
    }

    private fun isNotInCall(): Boolean {
        return !ApplicationWideCurrentRoomHolder.getInstance().isInCall &&
            !ApplicationWideCurrentRoomHolder.getInstance().isDialing
    }

    override val title: String
        get() =
            if (currentConversation?.displayName != null) {
                try {
                    " " + EmojiCompat.get().process(currentConversation?.displayName as CharSequence).toString()
                } catch (e: IllegalStateException) {
                    " " + currentConversation?.displayName
                }
            } else {
                ""
            }

    public override fun onDestroy() {
        super.onDestroy()

        if (activity != null) {
            activity?.findViewById<View>(R.id.toolbar)?.setOnClickListener(null)
        }

        if (actionBar != null) {
            actionBar?.setIcon(null)
        }

        currentlyPlayedVoiceMessage?.let { stopMediaPlayer(it) }

        adapter = null
        inConversation = false
    }

    private fun joinRoomWithPassword() {
        Log.d(
            TAG,
            "joinRoomWithPassword start: " + (currentConversation == null).toString() +
                "  sessionId: " + currentConversation?.sessionId
        )

        if (!validSessionId()) {
            var apiVersion = 1
            // FIXME Fix API checking with guests?
            if (conversationUser != null) {
                apiVersion = ApiUtils.getConversationApiVersion(conversationUser, intArrayOf(ApiUtils.APIv4, 1))
            }

            val startNanoTime = System.nanoTime()
            Log.d(TAG, "joinRoomWithPassword - joinRoom - calling: $startNanoTime")
            ncApi.joinRoom(
                credentials,
                ApiUtils.getUrlForParticipantsActive(apiVersion, conversationUser?.baseUrl, roomToken),
                roomPassword
            )
                ?.subscribeOn(Schedulers.io())
                ?.observeOn(AndroidSchedulers.mainThread())
                ?.retry(RETRIES)
                ?.subscribe(object : Observer<RoomOverall> {
                    override fun onSubscribe(d: Disposable) {
                        disposables.add(d)
                    }

                    @Suppress("Detekt.TooGenericExceptionCaught")
                    override fun onNext(roomOverall: RoomOverall) {
                        Log.d(TAG, "joinRoomWithPassword - joinRoom - got response: $startNanoTime")
                        inConversation = true
                        currentConversation?.sessionId = roomOverall.ocs!!.data!!.sessionId
                        Log.d(TAG, "joinRoomWithPassword - sessionId: " + currentConversation?.sessionId)

                        ApplicationWideCurrentRoomHolder.getInstance().session =
                            currentConversation?.sessionId

                        setupWebsocket()

                        try {
                            checkLobbyState()
                        } catch (npe: NullPointerException) {
                            // view binding can be null
                            // since this is called asynchronously and UI might have been destroyed in the meantime
                            Log.i(TAG, "UI destroyed - view binding already gone")
                        }

                        if (isFirstMessagesProcessing) {
                            pullChatMessages(0)
                        } else {
                            pullChatMessages(1, 0)
                        }

                        if (magicWebSocketInstance != null) {
                            magicWebSocketInstance?.joinRoomWithRoomTokenAndSession(
                                roomToken,
                                currentConversation?.sessionId
                            )
                        }
                        if (startCallFromNotification != null && startCallFromNotification ?: false) {
                            startCallFromNotification = false
                            startACall(voiceOnly, false)
                        }
                    }

                    override fun onError(e: Throwable) {
                        Log.e(TAG, "joinRoomWithPassword - joinRoom - ERROR", e)
                    }

                    override fun onComplete() {
                        // unused atm
                    }
                })
        } else {
            inConversation = true
            ApplicationWideCurrentRoomHolder.getInstance().session = currentConversation?.sessionId
            if (magicWebSocketInstance != null) {
                magicWebSocketInstance?.joinRoomWithRoomTokenAndSession(
                    roomToken,
                    currentConversation?.sessionId
                )
            }
            checkLobbyState()
            if (isFirstMessagesProcessing) {
                pullChatMessages(0)
            } else {
                pullChatMessages(1)
            }
        }
    }

    private fun leaveRoom() {
        Log.d(TAG, "leaveRoom")
        var apiVersion = 1
        // FIXME Fix API checking with guests?
        if (conversationUser != null) {
            apiVersion = ApiUtils.getConversationApiVersion(conversationUser, intArrayOf(ApiUtils.APIv4, 1))
        }

        val startNanoTime = System.nanoTime()
        Log.d(TAG, "leaveRoom - leaveRoom - calling: $startNanoTime")
        ncApi.leaveRoom(
            credentials,
            ApiUtils.getUrlForParticipantsActive(
                apiVersion,
                conversationUser?.baseUrl,
                roomToken
            )
        )
            ?.subscribeOn(Schedulers.io())
            ?.observeOn(AndroidSchedulers.mainThread())
            ?.subscribe(object : Observer<GenericOverall> {
                override fun onSubscribe(d: Disposable) {
                    disposables.add(d)
                }

                override fun onNext(genericOverall: GenericOverall) {
                    Log.d(TAG, "leaveRoom - leaveRoom - got response: $startNanoTime")
                    checkingLobbyStatus = false

                    if (lobbyTimerHandler != null) {
                        lobbyTimerHandler?.removeCallbacksAndMessages(null)
                    }

                    if (magicWebSocketInstance != null && currentConversation != null) {
                        magicWebSocketInstance?.joinRoomWithRoomTokenAndSession(
                            "",
                            currentConversation?.sessionId
                        )
                    } else {
                        Log.e(TAG, "magicWebSocketInstance or currentConversation were null! Failed to leave the room!")
                    }

                    currentConversation?.sessionId = "0"
                }

                override fun onError(e: Throwable) {
                    Log.e(TAG, "leaveRoom - leaveRoom - ERROR", e)
                }

                override fun onComplete() {
                    Log.d(TAG, "leaveRoom - leaveRoom - completed: $startNanoTime")
                    disposables.dispose()
                }
            })
    }

    private fun submitMessage(sendWithoutNotification: Boolean) {
        if (binding.messageInputView.inputEditText != null) {
            val editable = binding.messageInputView.inputEditText!!.editableText
            val mentionSpans = editable.getSpans(
                0,
                editable.length,
                Spans.MentionChipSpan::class.java
            )
            var mentionSpan: Spans.MentionChipSpan
            for (i in mentionSpans.indices) {
                mentionSpan = mentionSpans[i]
                var mentionId = mentionSpan.id
                if (mentionId.contains(" ") || mentionId.startsWith("guest/")) {
                    mentionId = "\"" + mentionId + "\""
                }
                editable.replace(editable.getSpanStart(mentionSpan), editable.getSpanEnd(mentionSpan), "@$mentionId")
            }

            binding.messageInputView.inputEditText?.setText("")
            val replyMessageId: Int? = view?.findViewById<RelativeLayout>(R.id.quotedChatMessageView)?.tag as Int?
            sendMessage(
                editable,
                if (
                    view
                        ?.findViewById<RelativeLayout>(R.id.quotedChatMessageView)
                        ?.visibility == View.VISIBLE
                ) replyMessageId else null,
                sendWithoutNotification
            )
            cancelReply()
        }
    }

    private fun sendMessage(message: CharSequence, replyTo: Int?, sendWithoutNotification: Boolean) {
        if (conversationUser != null) {
            val apiVersion = ApiUtils.getChatApiVersion(conversationUser, intArrayOf(1))

            ncApi.sendChatMessage(
                credentials,
                ApiUtils.getUrlForChat(apiVersion, conversationUser.baseUrl, roomToken),
                message,
                conversationUser.displayName,
                replyTo,
                sendWithoutNotification
            )
                ?.subscribeOn(Schedulers.io())
                ?.observeOn(AndroidSchedulers.mainThread())
                ?.subscribe(object : Observer<GenericOverall> {
                    override fun onSubscribe(d: Disposable) {
                        // unused atm
                    }

                    @Suppress("Detekt.TooGenericExceptionCaught")
                    override fun onNext(genericOverall: GenericOverall) {
                        myFirstMessage = message

                        try {
                            if (binding.popupBubbleView.isShown) {
                                binding.popupBubbleView.hide()
                            }

                            binding.messagesListView.smoothScrollToPosition(0)
                        } catch (npe: NullPointerException) {
                            // view binding can be null
                            // since this is called asynchronously and UI might have been destroyed in the meantime
                            Log.i(TAG, "UI destroyed - view binding already gone")
                        }
                    }

                    override fun onError(e: Throwable) {
                        if (e is HttpException) {
                            val code = e.code()
                            if (code.toString().startsWith("2")) {
                                myFirstMessage = message

                                if (binding.popupBubbleView.isShown) {
                                    binding.popupBubbleView.hide()
                                }

                                binding.messagesListView.smoothScrollToPosition(0)
                            }
                        }
                    }

                    override fun onComplete() {
                        // unused atm
                    }
                })
        }
        showMicrophoneButton(true)
    }

    private fun setupWebsocket() {
        if (conversationUser != null) {
            magicWebSocketInstance =
                if (WebSocketConnectionHelper.getMagicWebSocketInstanceForUserId(conversationUser.id!!) != null) {
                    WebSocketConnectionHelper.getMagicWebSocketInstanceForUserId(conversationUser.id!!)
                } else {
                    Log.d(TAG, "magicWebSocketInstance became null")
                    null
                }
        }
    }

    fun pullChatMessages(lookIntoFuture: Int, setReadMarker: Int = 1, xChatLastCommonRead: Int? = null) {
        if (!inConversation) {
            return
        }

        if (pullChatMessagesPending) {
            // Sometimes pullChatMessages may be called before response to a previous call is received.
            // In such cases just ignore the second call. Message processing will continue when response to the
            // earlier call is received.
            // More details: https://github.com/nextcloud/talk-android/pull/1766
            Log.d(TAG, "pullChatMessages - pullChatMessagesPending is true, exiting")
            return
        }
        pullChatMessagesPending = true

        if (currentConversation != null && currentConversation!!.shouldShowLobby(conversationUser!!)) {
            // return
        }

        val fieldMap = HashMap<String, Int>()
        fieldMap["includeLastKnown"] = 0

        if (lookIntoFuture > 0) {
            lookingIntoFuture = true
        } else if (isFirstMessagesProcessing) {
            if (currentConversation != null) {
                globalLastKnownFutureMessageId = currentConversation!!.lastReadMessage
                globalLastKnownPastMessageId = currentConversation!!.lastReadMessage
                fieldMap["includeLastKnown"] = 1
            }
        }

        val timeout = if (lookingIntoFuture) {
            LOOKING_INTO_FUTURE_TIMEOUT
        } else {
            0
        }

        fieldMap["timeout"] = timeout

        fieldMap["lookIntoFuture"] = lookIntoFuture
        fieldMap["limit"] = MESSAGE_PULL_LIMIT
        fieldMap["setReadMarker"] = setReadMarker

        val lastKnown = if (lookIntoFuture > 0) {
            globalLastKnownFutureMessageId
        } else {
            globalLastKnownPastMessageId
        }

        fieldMap["lastKnownMessageId"] = lastKnown
        xChatLastCommonRead?.let {
            fieldMap["lastCommonReadId"] = it
        }

        var apiVersion = 1
        // FIXME this is a best guess, guests would need to get the capabilities themselves
        if (conversationUser != null) {
            apiVersion = ApiUtils.getChatApiVersion(conversationUser, intArrayOf(1))
        }

        if (lookIntoFuture > 0) {
            Log.d(TAG, "pullChatMessages - pullChatMessages[lookIntoFuture > 0] - calling")
            ncApi.pullChatMessages(
                credentials,
                ApiUtils.getUrlForChat(apiVersion, conversationUser?.baseUrl, roomToken),
                fieldMap
            )
                ?.subscribeOn(Schedulers.io())
                ?.observeOn(AndroidSchedulers.mainThread())
                ?.subscribe(object : Observer<Response<*>> {
                    override fun onSubscribe(d: Disposable) {
                        disposables.add(d)
                    }

                    @Suppress("Detekt.TooGenericExceptionCaught")
                    override fun onNext(response: Response<*>) {
                        Log.d(TAG, "pullChatMessages - pullChatMessages[lookIntoFuture > 0] - got response")
                        pullChatMessagesPending = false
                        try {
                            if (response.code() == HTTP_CODE_NOT_MODIFIED) {
                                Log.d(TAG, "pullChatMessages - quasi recursive call to pullChatMessages")
                                pullChatMessages(1, setReadMarker, xChatLastCommonRead)
                            } else if (response.code() == HTTP_CODE_PRECONDITION_FAILED) {
                                futurePreconditionFailed = true
                            } else {
                                processMessagesResponse(response, true)
                            }
                        } catch (npe: NullPointerException) {
                            // view binding can be null
                            // since this is called asynchronously and UI might have been destroyed in the meantime
                            Log.i(TAG, "UI destroyed - view binding already gone")
                        }

                        processExpiredMessages()
                    }

                    override fun onError(e: Throwable) {
                        Log.e(TAG, "pullChatMessages - pullChatMessages[lookIntoFuture > 0] - ERROR", e)
                        pullChatMessagesPending = false
                    }

                    override fun onComplete() {
                        pullChatMessagesPending = false
                    }
                })
        } else {
            Log.d(TAG, "pullChatMessages - pullChatMessages[lookIntoFuture <= 0] - calling")
            ncApi.pullChatMessages(
                credentials,
                ApiUtils.getUrlForChat(apiVersion, conversationUser?.baseUrl, roomToken),
                fieldMap
            )
                ?.subscribeOn(Schedulers.io())
                ?.observeOn(AndroidSchedulers.mainThread())
                ?.subscribe(object : Observer<Response<*>> {
                    override fun onSubscribe(d: Disposable) {
                        disposables.add(d)
                    }

                    @Suppress("Detekt.TooGenericExceptionCaught")
                    override fun onNext(response: Response<*>) {
                        Log.d(TAG, "pullChatMessages - pullChatMessages[lookIntoFuture <= 0] - got response")
                        pullChatMessagesPending = false
                        try {
                            if (response.code() == HTTP_CODE_PRECONDITION_FAILED) {
                                pastPreconditionFailed = true
                            } else {
                                processMessagesResponse(response, false)
                            }
                        } catch (e: NullPointerException) {
                            // view binding can be null
                            // since this is called asynchronously and UI might have been destroyed in the meantime
                            Log.i(TAG, "UI destroyed - view binding already gone", e)
                        }

                        processExpiredMessages()
                    }

                    override fun onError(e: Throwable) {
                        Log.e(TAG, "pullChatMessages - pullChatMessages[lookIntoFuture <= 0] - ERROR", e)
                        pullChatMessagesPending = false
                    }

                    override fun onComplete() {
                        pullChatMessagesPending = false
                    }
                })
        }
    }

    private fun processExpiredMessages() {
        fun deleteExpiredMessages() {
            val messagesToDelete: ArrayList<ChatMessage> = ArrayList()
            val systemTime = System.currentTimeMillis() / ONE_SECOND_IN_MILLIS

            if (adapter?.items != null) {
                for (itemWrapper in adapter?.items!!) {
                    if (itemWrapper.item is ChatMessage) {
                        val chatMessage = itemWrapper.item as ChatMessage
                        if (chatMessage.expirationTimestamp != 0 && chatMessage.expirationTimestamp < systemTime) {
                            messagesToDelete.add(chatMessage)
                        }
                    }
                }
                adapter!!.delete(messagesToDelete)
                adapter!!.notifyDataSetChanged()
            }
        }

        if (CapabilitiesUtilNew.hasSpreedFeatureCapability(conversationUser, "message-expiration")) {
            deleteExpiredMessages()
        }
    }

    private fun processMessagesResponse(response: Response<*>, isFromTheFuture: Boolean) {

        val xChatLastCommonRead = response.headers()["X-Chat-Last-Common-Read"]?.let {
            Integer.parseInt(it)
        }

        processHeaderChatLastGiven(response, isFromTheFuture)

        if (response.code() == HTTP_CODE_OK) {
            val chatOverall = response.body() as ChatOverall?
            val chatMessageList = handleSystemMessages(chatOverall?.ocs!!.data!!)

            processMessages(chatMessageList, isFromTheFuture, xChatLastCommonRead)
        } else if (response.code() == HTTP_CODE_NOT_MODIFIED && !isFromTheFuture) {
            if (isFirstMessagesProcessing) {
                cancelNotificationsForCurrentConversation()

                isFirstMessagesProcessing = false
                binding.progressBar.visibility = View.GONE
            }

            historyRead = true

            if (!lookingIntoFuture && inConversation) {
                pullChatMessages(1)
            }
        }
    }

    private fun processMessages(
        chatMessageList: List<ChatMessage>,
        isFromTheFuture: Boolean,
        xChatLastCommonRead: Int?
    ) {
        if (chatMessageList.isNotEmpty() &&
            ChatMessage.SystemMessageType.CLEARED_CHAT == chatMessageList[0].systemMessageType
        ) {
            adapter?.clear()
            adapter?.notifyDataSetChanged()
        }

        if (isFirstMessagesProcessing) {
            cancelNotificationsForCurrentConversation()

            isFirstMessagesProcessing = false
            binding.progressBar.visibility = View.GONE

            binding.messagesListView.visibility = View.VISIBLE
        }

        if (isFromTheFuture) {
            processMessagesFromTheFuture(chatMessageList)
        } else {
            processMessagesNotFromTheFuture(chatMessageList)
        }

        updateReadStatusOfAllMessages(xChatLastCommonRead)
        adapter?.notifyDataSetChanged()

        if (inConversation) {
            pullChatMessages(1, 1, xChatLastCommonRead)
        }
    }

    private fun updateReadStatusOfAllMessages(xChatLastCommonRead: Int?) {
        for (message in adapter!!.items) {
            xChatLastCommonRead?.let {
                updateReadStatusOfMessage(message, it)
            }
        }
    }

    private fun updateReadStatusOfMessage(
        message: MessagesListAdapter<IMessage>.Wrapper<Any>,
        xChatLastCommonRead: Int
    ) {
        if (message.item is ChatMessage) {
            val chatMessage = message.item as ChatMessage

            if (chatMessage.jsonMessageId <= xChatLastCommonRead) {
                chatMessage.readStatus = ReadStatus.READ
            } else {
                chatMessage.readStatus = ReadStatus.SENT
            }
        }
    }

    private fun processMessagesFromTheFuture(chatMessageList: List<ChatMessage>) {

        val shouldAddNewMessagesNotice = (adapter?.itemCount ?: 0) > 0 && chatMessageList.isNotEmpty()

        if (shouldAddNewMessagesNotice) {
            val unreadChatMessage = ChatMessage()
            unreadChatMessage.jsonMessageId = -1
            unreadChatMessage.actorId = "-1"
            unreadChatMessage.timestamp = chatMessageList[0].timestamp
            unreadChatMessage.message = context.getString(R.string.nc_new_messages)
            adapter?.addToStart(unreadChatMessage, false)
        }

        determinePreviousMessageIds(chatMessageList)

        addMessagesToAdapter(shouldAddNewMessagesNotice, chatMessageList)

        if (shouldAddNewMessagesNotice && adapter != null) {
            layoutManager?.scrollToPositionWithOffset(
                adapter!!.getMessagePositionByIdInReverse("-1"),
                binding.messagesListView.height / 2
            )
        }
    }

    private fun addMessagesToAdapter(
        shouldAddNewMessagesNotice: Boolean,
        chatMessageList: List<ChatMessage>
    ) {
        val isThereANewNotice =
            shouldAddNewMessagesNotice || adapter?.getMessagePositionByIdInReverse("-1") != -1
        for (chatMessage in chatMessageList) {
            chatMessage.activeUser = conversationUser

            val shouldScroll =
                !isThereANewNotice &&
                    !shouldAddNewMessagesNotice &&
                    layoutManager?.findFirstVisibleItemPosition() == 0 ||
                    adapter != null &&
                    adapter?.itemCount == 0

            modifyMessageCount(shouldAddNewMessagesNotice, shouldScroll)

            adapter?.let {
                chatMessage.isGrouped = (
                    it.isPreviousSameAuthor(
                        chatMessage.actorId,
                        -1
                    ) && it.getSameAuthorLastMessagesCount(chatMessage.actorId) %
                        GROUPED_MESSAGES_SAME_AUTHOR_THRESHOLD > 0
                    )
                chatMessage.isOneToOneConversation =
                    (currentConversation?.type == Conversation.ConversationType.ROOM_TYPE_ONE_TO_ONE_CALL)
                it.addToStart(chatMessage, shouldScroll)
            }
        }
    }

    private fun modifyMessageCount(shouldAddNewMessagesNotice: Boolean, shouldScroll: Boolean) {
        if (!shouldAddNewMessagesNotice && !shouldScroll) {
            if (!binding.popupBubbleView.isShown) {
                newMessagesCount = 1
                binding.popupBubbleView.show()
            } else if (binding.popupBubbleView.isShown) {
                newMessagesCount++
            }
        } else {
            newMessagesCount = 0
        }
    }

    private fun processMessagesNotFromTheFuture(chatMessageList: List<ChatMessage>) {
        var countGroupedMessages = 0
        determinePreviousMessageIds(chatMessageList)

        for (i in chatMessageList.indices) {
            if (chatMessageList.size > i + 1) {
                if (isSameDayNonSystemMessages(chatMessageList[i], chatMessageList[i + 1]) &&
                    chatMessageList[i + 1].actorId == chatMessageList[i].actorId &&
                    countGroupedMessages < GROUPED_MESSAGES_THRESHOLD
                ) {
                    chatMessageList[i].isGrouped = true
                    countGroupedMessages++
                } else {
                    countGroupedMessages = 0
                }
            }

            val chatMessage = chatMessageList[i]
            chatMessage.isOneToOneConversation =
                currentConversation?.type == Conversation.ConversationType.ROOM_TYPE_ONE_TO_ONE_CALL
            chatMessage.activeUser = conversationUser
        }

        if (adapter != null) {
            adapter?.addToEnd(chatMessageList, false)
        }
        scrollToRequestedMessageIfNeeded()
    }

    private fun determinePreviousMessageIds(chatMessageList: List<ChatMessage>) {
        var previousMessageId = NO_PREVIOUS_MESSAGE_ID
        for (i in chatMessageList.indices.reversed()) {
            val chatMessage = chatMessageList[i]

            if (previousMessageId > NO_PREVIOUS_MESSAGE_ID) {
                chatMessage.previousMessageId = previousMessageId
            } else if (adapter?.isEmpty != true) {
                if (adapter!!.items[0].item is ChatMessage) {
                    chatMessage.previousMessageId = (adapter!!.items[0].item as ChatMessage).jsonMessageId
                } else if (adapter!!.items.size > 1 && adapter!!.items[1].item is ChatMessage) {
                    chatMessage.previousMessageId = (adapter!!.items[1].item as ChatMessage).jsonMessageId
                }
            }

            previousMessageId = chatMessage.jsonMessageId
        }
    }

    private fun processHeaderChatLastGiven(response: Response<*>, isFromTheFuture: Boolean) {
        val xChatLastGivenHeader: String? = response.headers()["X-Chat-Last-Given"]

        val header = if (response.headers().size > 0 &&
            xChatLastGivenHeader?.isNotEmpty() == true
        ) {
            xChatLastGivenHeader.toInt()
        } else {
            return
        }

        if (header > 0) {
            if (isFromTheFuture) {
                globalLastKnownFutureMessageId = header
            } else {
                if (globalLastKnownFutureMessageId == -1) {
                    globalLastKnownFutureMessageId = header
                }
                globalLastKnownPastMessageId = header
            }
        }
    }

    private fun scrollToRequestedMessageIfNeeded() {
        args.getString(BundleKeys.KEY_MESSAGE_ID)?.let {
            scrollToMessageWithId(it)
        }
    }

    private fun isSameDayNonSystemMessages(messageLeft: ChatMessage, messageRight: ChatMessage): Boolean {
        return TextUtils.isEmpty(messageLeft.systemMessage) &&
            TextUtils.isEmpty(messageRight.systemMessage) &&
            DateFormatter.isSameDay(messageLeft.createdAt, messageRight.createdAt)
    }

    override fun onLoadMore(page: Int, totalItemsCount: Int) {
        if (!historyRead && inConversation) {
            pullChatMessages(0)
        }
    }

    override fun format(date: Date): String {
        return if (DateFormatter.isToday(date)) {
            resources!!.getString(R.string.nc_date_header_today)
        } else if (DateFormatter.isYesterday(date)) {
            resources!!.getString(R.string.nc_date_header_yesterday)
        } else {
            DateFormatter.format(date, DateFormatter.Template.STRING_DAY_MONTH_YEAR)
        }
    }

    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
        super.onCreateOptionsMenu(menu, inflater)
        inflater.inflate(R.menu.menu_conversation, menu)

        viewThemeUtils.platform.colorToolbarMenuIcon(
            binding.messageInputView.context,
            menu.findItem(R.id.conversation_voice_call)
        )

        viewThemeUtils.platform.colorToolbarMenuIcon(
            binding.messageInputView.context,
            menu.findItem(R.id.conversation_video_call)
        )

        if (conversationUser?.userId == "?") {
            menu.removeItem(R.id.conversation_info)
        } else {
            conversationInfoMenuItem = menu.findItem(R.id.conversation_info)

            if (CapabilitiesUtilNew.hasSpreedFeatureCapability(conversationUser, "rich-object-list-media")) {
                conversationSharedItemsItem = menu.findItem(R.id.shared_items)
            } else {
                menu.removeItem(R.id.shared_items)
            }

            loadAvatarForStatusBar()
        }

        if (CapabilitiesUtilNew.isAbleToCall(conversationUser)) {
            conversationVoiceCallMenuItem = menu.findItem(R.id.conversation_voice_call)
            conversationVideoMenuItem = menu.findItem(R.id.conversation_video_call)

            if (CapabilitiesUtilNew.hasSpreedFeatureCapability(conversationUser, "silent-call")) {
                Handler().post {
                    activity?.findViewById<View?>(R.id.conversation_voice_call)?.setOnLongClickListener {
                        showCallButtonMenu(true)
                        true
                    }
                }

                Handler().post {
                    activity?.findViewById<View?>(R.id.conversation_video_call)?.setOnLongClickListener {
                        showCallButtonMenu(false)
                        true
                    }
                }
            }
        } else {
            menu.removeItem(R.id.conversation_video_call)
            menu.removeItem(R.id.conversation_voice_call)
        }
    }

    override fun onPrepareOptionsMenu(menu: Menu) {
        super.onPrepareOptionsMenu(menu)
        conversationUser?.let {
            if (CapabilitiesUtilNew.hasSpreedFeatureCapability(it, "read-only-rooms")) {
                checkShowCallButtons()
            }
            val searchItem = menu.findItem(R.id.conversation_search)
            searchItem.isVisible = CapabilitiesUtilNew.isUnifiedSearchAvailable(it)
        }
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        return when (item.itemId) {
            android.R.id.home -> {
                (activity as MainActivity).resetConversationsList()
                true
            }
            R.id.conversation_video_call -> {
                startACall(false, false)
                true
            }
            R.id.conversation_voice_call -> {
                startACall(true, false)
                true
            }
            R.id.conversation_info -> {
                showConversationInfoScreen()
                true
            }
            R.id.shared_items -> {
                showSharedItems()
                true
            }
            R.id.conversation_search -> {
                startMessageSearch()
                true
            }
            else -> super.onOptionsItemSelected(item)
        }
    }

    private fun showSharedItems() {
        val intent = Intent(activity, SharedItemsActivity::class.java)
        intent.putExtra(KEY_CONVERSATION_NAME, currentConversation?.displayName)
        intent.putExtra(KEY_ROOM_TOKEN, roomToken)
        intent.putExtra(KEY_USER_ENTITY, conversationUser as Parcelable)
        intent.putExtra(
            SharedItemsActivity.KEY_USER_IS_OWNER_OR_MODERATOR,
            currentConversation?.isParticipantOwnerOrModerator
        )
        activity!!.startActivity(intent)
    }

    private fun startMessageSearch() {
        val intent = Intent(activity, MessageSearchActivity::class.java)
        intent.putExtra(KEY_CONVERSATION_NAME, currentConversation?.displayName)
        intent.putExtra(KEY_ROOM_TOKEN, roomToken)
        startActivityForResult(intent, REQUEST_CODE_MESSAGE_SEARCH)
    }

    private fun handleSystemMessages(chatMessageList: List<ChatMessage>): List<ChatMessage> {
        val chatMessageMap = chatMessageList.map { it.id to it }.toMap().toMutableMap()
        val chatMessageIterator = chatMessageMap.iterator()
        while (chatMessageIterator.hasNext()) {
            val currentMessage = chatMessageIterator.next()

            // setDeletionFlagsAndRemoveInfomessages
            if (isInfoMessageAboutDeletion(currentMessage)) {
                if (!chatMessageMap.containsKey(currentMessage.value.parentMessage!!.id)) {
                    // if chatMessageMap doesn't contain message to delete (this happens when lookingIntoFuture),
                    // the message to delete has to be modified directly inside the adapter
                    setMessageAsDeleted(currentMessage.value.parentMessage)
                } else {
                    chatMessageMap[currentMessage.value.parentMessage!!.id]!!.isDeleted = true
                }
                chatMessageIterator.remove()
            }

            // delete reactions system messages
            else if (isReactionsMessage(currentMessage)) {
                if (!chatMessageMap.containsKey(currentMessage.value.parentMessage!!.id)) {
                    updateAdapterForReaction(currentMessage.value.parentMessage)
                }

                chatMessageIterator.remove()
            }

            // delete poll system messages
            else if (isPollVotedMessage(currentMessage)) {
                chatMessageIterator.remove()
            }
        }
        return chatMessageMap.values.toList()
    }

    private fun isInfoMessageAboutDeletion(currentMessage: MutableMap.MutableEntry<String, ChatMessage>): Boolean {
        return currentMessage.value.parentMessage != null && currentMessage.value.systemMessageType == ChatMessage
            .SystemMessageType.MESSAGE_DELETED
    }

    private fun isReactionsMessage(currentMessage: MutableMap.MutableEntry<String, ChatMessage>): Boolean {
        return currentMessage.value.systemMessageType == ChatMessage.SystemMessageType.REACTION ||
            currentMessage.value.systemMessageType == ChatMessage.SystemMessageType.REACTION_DELETED ||
            currentMessage.value.systemMessageType == ChatMessage.SystemMessageType.REACTION_REVOKED
    }

    private fun isPollVotedMessage(currentMessage: MutableMap.MutableEntry<String, ChatMessage>): Boolean {
        return currentMessage.value.systemMessageType == ChatMessage.SystemMessageType.POLL_VOTED
    }

    private fun startACall(isVoiceOnlyCall: Boolean, callWithoutNotification: Boolean) {
        val pp = ParticipantPermissions(conversationUser!!, currentConversation!!)
        if (!pp.canStartCall() && currentConversation?.hasCall == false) {
            Toast.makeText(context, R.string.startCallForbidden, Toast.LENGTH_LONG).show()
        } else {
            ApplicationWideCurrentRoomHolder.getInstance().isDialing = true
            val callIntent = getIntentForCall(isVoiceOnlyCall, callWithoutNotification)
            if (callIntent != null) {
                startActivity(callIntent)
            }
        }
    }

    private fun getIntentForCall(isVoiceOnlyCall: Boolean, callWithoutNotification: Boolean): Intent? {
        currentConversation?.let {
            val bundle = Bundle()
            bundle.putString(KEY_ROOM_TOKEN, roomToken)
            bundle.putString(KEY_ROOM_ID, roomId)
            bundle.putParcelable(KEY_USER_ENTITY, conversationUser)
            bundle.putString(BundleKeys.KEY_CONVERSATION_PASSWORD, roomPassword)
            bundle.putString(BundleKeys.KEY_MODIFIED_BASE_URL, conversationUser?.baseUrl)
            bundle.putString(KEY_CONVERSATION_NAME, it.displayName)

            if (isVoiceOnlyCall) {
                bundle.putBoolean(BundleKeys.KEY_CALL_VOICE_ONLY, true)
            }
            if (callWithoutNotification) {
                bundle.putBoolean(BundleKeys.KEY_CALL_WITHOUT_NOTIFICATION, true)
            }

            return if (activity != null) {
                val callIntent = Intent(activity, CallActivity::class.java)
                callIntent.putExtras(bundle)
                callIntent
            } else {
                null
            }
        } ?: run {
            return null
        }
    }

    override fun onClickReactions(chatMessage: ChatMessage) {
        activity?.let {
            ShowReactionsDialog(
                activity!!,
                currentConversation,
                chatMessage,
                conversationUser,
                hasChatPermission,
                ncApi
            ).show()
        }
    }

    override fun onLongClickReactions(chatMessage: ChatMessage) {
        openMessageActionsDialog(chatMessage)
    }

    override fun onMessageViewLongClick(view: View?, message: IMessage?) {
        openMessageActionsDialog(message)
    }

    override fun onPreviewMessageLongClick(chatMessage: ChatMessage) {
        openMessageActionsDialog(chatMessage)
    }

    private fun openMessageActionsDialog(iMessage: IMessage?) {
        val message = iMessage as ChatMessage
        if (hasVisibleItems(message) && !isSystemMessage(message)) {
            activity?.let {
                MessageActionsDialog(
                    this,
                    message,
                    conversationUser,
                    currentConversation,
                    isShowMessageDeletionButton(message),
                    hasChatPermission,
                    ncApi
                ).show()
            }
        }
    }

    private fun isSystemMessage(message: ChatMessage): Boolean {
        return ChatMessage.MessageType.SYSTEM_MESSAGE == message.getCalculateMessageType()
    }

    fun deleteMessage(message: IMessage?) {
        if (!hasChatPermission) {
            Log.w(
                TAG,
                "Deletion of message is skipped because of restrictions by permissions. " +
                    "This method should not have been called!"
            )
            Toast.makeText(context, R.string.nc_common_error_sorry, Toast.LENGTH_LONG).show()
        } else {
            var apiVersion = 1
            // FIXME Fix API checking with guests?
            if (conversationUser != null) {
                apiVersion = ApiUtils.getChatApiVersion(conversationUser, intArrayOf(1))
            }

            ncApi.deleteChatMessage(
                credentials,
                ApiUtils.getUrlForChatMessage(
                    apiVersion,
                    conversationUser?.baseUrl,
                    roomToken,
                    message?.id
                )
            )?.subscribeOn(Schedulers.io())
                ?.observeOn(AndroidSchedulers.mainThread())
                ?.subscribe(object : Observer<ChatOverallSingleMessage> {
                    override fun onSubscribe(d: Disposable) {
                        // unused atm
                    }

                    override fun onNext(t: ChatOverallSingleMessage) {
                        if (t.ocs!!.meta!!.statusCode == HttpURLConnection.HTTP_ACCEPTED) {
                            Toast.makeText(
                                context,
                                R.string.nc_delete_message_leaked_to_matterbridge,
                                Toast.LENGTH_LONG
                            ).show()
                        }
                    }

                    override fun onError(e: Throwable) {
                        Log.e(
                            TAG,
                            "Something went wrong when trying to delete message with id " +
                                message?.id,
                            e
                        )
                        Toast.makeText(context, R.string.nc_common_error_sorry, Toast.LENGTH_LONG).show()
                    }

                    override fun onComplete() {
                        // unused atm
                    }
                })
        }
    }

    fun replyPrivately(message: IMessage?) {
        val apiVersion =
            ApiUtils.getConversationApiVersion(conversationUser, intArrayOf(ApiUtils.APIv4, 1))
        val retrofitBucket = ApiUtils.getRetrofitBucketForCreateRoom(
            apiVersion,
            conversationUser?.baseUrl,
            "1",
            null,
            message?.user?.id?.substring(INVITE_LENGTH),
            null
        )
        ncApi.createRoom(
            credentials,
            retrofitBucket.url,
            retrofitBucket.queryMap
        )
            .subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(object : Observer<RoomOverall> {
                override fun onSubscribe(d: Disposable) {
                    // unused atm
                }

                override fun onNext(roomOverall: RoomOverall) {
                    val bundle = Bundle()
                    bundle.putParcelable(KEY_USER_ENTITY, conversationUser)
                    bundle.putString(KEY_ROOM_TOKEN, roomOverall.ocs!!.data!!.token)
                    bundle.putString(KEY_ROOM_ID, roomOverall.ocs!!.data!!.roomId)

                    // FIXME once APIv2+ is used only, the createRoom already returns all the data
                    ncApi.getRoom(
                        credentials,
                        ApiUtils.getUrlForRoom(
                            apiVersion,
                            conversationUser?.baseUrl,
                            roomOverall.ocs!!.data!!.token
                        )
                    )
                        .subscribeOn(Schedulers.io())
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(object : Observer<RoomOverall> {
                            override fun onSubscribe(d: Disposable) {
                                // unused atm
                            }

                            override fun onNext(roomOverall: RoomOverall) {
                                bundle.putParcelable(
                                    KEY_ACTIVE_CONVERSATION,
                                    Parcels.wrap(roomOverall.ocs!!.data!!)
                                )
                                remapChatController(
                                    router,
                                    conversationUser!!.id!!,
                                    roomOverall.ocs!!.data!!.token!!,
                                    bundle,
                                    true
                                )
                            }

                            override fun onError(e: Throwable) {
                                Log.e(TAG, e.message, e)
                            }

                            override fun onComplete() {
                                // unused atm
                            }
                        })
                }

                override fun onError(e: Throwable) {
                    Log.e(TAG, e.message, e)
                }

                override fun onComplete() {
                    // unused atm
                }
            })
    }

    fun forwardMessage(message: IMessage?) {
        val bundle = Bundle()
        bundle.putBoolean(BundleKeys.KEY_FORWARD_MSG_FLAG, true)
        bundle.putString(BundleKeys.KEY_FORWARD_MSG_TEXT, message?.text)
        bundle.putString(BundleKeys.KEY_FORWARD_HIDE_SOURCE_ROOM, roomId)
        router.pushController(
            RouterTransaction.with(ConversationsListController(bundle))
                .pushChangeHandler(HorizontalChangeHandler())
                .popChangeHandler(HorizontalChangeHandler())
        )
    }

    fun markAsUnread(message: IMessage?) {
        val chatMessage = message as ChatMessage?
        if (chatMessage!!.previousMessageId > NO_PREVIOUS_MESSAGE_ID) {
            ncApi.setChatReadMarker(
                credentials,
                ApiUtils.getUrlForSetChatReadMarker(
                    ApiUtils.getChatApiVersion(conversationUser, intArrayOf(ApiUtils.APIv1)),
                    conversationUser?.baseUrl,
                    roomToken
                ),
                chatMessage.previousMessageId
            )
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(object : Observer<GenericOverall> {
                    override fun onSubscribe(d: Disposable) {
                        // unused atm
                    }

                    override fun onNext(t: GenericOverall) {
                        // unused atm
                    }

                    override fun onError(e: Throwable) {
                        Log.e(TAG, e.message, e)
                    }

                    override fun onComplete() {
                        // unused atm
                    }
                })
        }
    }

    fun copyMessage(message: IMessage?) {
        val clipboardManager =
            activity?.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
        val clipData = ClipData.newPlainText(
            resources?.getString(R.string.nc_app_product_name),
            message?.text
        )
        clipboardManager.setPrimaryClip(clipData)
    }

    private fun hasVisibleItems(message: ChatMessage): Boolean {
        return !message.isDeleted || // copy message
            message.replyable || // reply to
            message.replyable && // reply privately
            conversationUser?.userId?.isNotEmpty() == true && conversationUser.userId != "?" &&
            message.user.id.startsWith("users/") &&
            message.user.id.substring(ACTOR_LENGTH) != currentConversation?.actorId &&
            currentConversation?.type != Conversation.ConversationType.ROOM_TYPE_ONE_TO_ONE_CALL ||
            isShowMessageDeletionButton(message) || // delete
            ChatMessage.MessageType.REGULAR_TEXT_MESSAGE == message.getCalculateMessageType() || // forward
            message.previousMessageId > NO_PREVIOUS_MESSAGE_ID && // mark as unread
            ChatMessage.MessageType.SYSTEM_MESSAGE != message.getCalculateMessageType() &&
            BuildConfig.DEBUG
    }

    fun replyToMessage(message: IMessage?) {
        val chatMessage = message as ChatMessage?
        chatMessage?.let {
            binding.messageInputView.findViewById<ImageButton>(R.id.attachmentButton)?.visibility =
                View.GONE
            binding.messageInputView.findViewById<ImageButton>(R.id.cancelReplyButton)?.visibility =
                View.VISIBLE

            val quotedMessage = binding
                .messageInputView
                .findViewById<EmojiTextView>(R.id.quotedMessage)

            quotedMessage?.maxLines = 2
            quotedMessage?.ellipsize = TextUtils.TruncateAt.END
            quotedMessage?.text = it.text
            binding.messageInputView.findViewById<EmojiTextView>(R.id.quotedMessageAuthor)?.text =
                it.actorDisplayName ?: context.getText(R.string.nc_nick_guest)

            conversationUser?.let { currentUser ->
                val quotedMessageImage = binding
                    .messageInputView
                    .findViewById<ImageView>(R.id.quotedMessageImage)
                chatMessage.imageUrl?.let { previewImageUrl ->
                    quotedMessageImage?.visibility = View.VISIBLE

                    val px = TypedValue.applyDimension(
                        TypedValue.COMPLEX_UNIT_DIP,
                        QUOTED_MESSAGE_IMAGE_MAX_HEIGHT,
                        resources?.displayMetrics
                    )

                    quotedMessageImage?.maxHeight = px.toInt()
                    val layoutParams = quotedMessageImage?.layoutParams as FlexboxLayout.LayoutParams
                    layoutParams.flexGrow = 0f
                    quotedMessageImage.layoutParams = layoutParams
                    quotedMessageImage.load(previewImageUrl) {
                        addHeader("Authorization", credentials!!)
                    }
                } ?: run {
                    binding
                        .messageInputView
                        .findViewById<ImageView>(R.id.quotedMessageImage)
                        ?.visibility = View.GONE
                }
            }

            val quotedChatMessageView = binding
                .messageInputView
                .findViewById<RelativeLayout>(R.id.quotedChatMessageView)
            quotedChatMessageView?.tag = message?.jsonMessageId
            quotedChatMessageView?.visibility = View.VISIBLE
        }
    }

    private fun showMicrophoneButton(show: Boolean) {
        if (show && CapabilitiesUtilNew.hasSpreedFeatureCapability(conversationUser, "voice-message-sharing")) {
            binding.messageInputView.messageSendButton.visibility = View.GONE
            binding.messageInputView.recordAudioButton.visibility = View.VISIBLE
        } else {
            binding.messageInputView.messageSendButton.visibility = View.VISIBLE
            binding.messageInputView.recordAudioButton.visibility = View.GONE
        }
    }

    private fun setMessageAsDeleted(message: IMessage?) {
        val messageTemp = message as ChatMessage
        messageTemp.isDeleted = true

        messageTemp.isOneToOneConversation =
            currentConversation?.type == Conversation.ConversationType.ROOM_TYPE_ONE_TO_ONE_CALL
        messageTemp.activeUser = conversationUser

        adapter?.update(messageTemp)
    }

    private fun updateAdapterForReaction(message: IMessage?) {
        val messageTemp = message as ChatMessage

        messageTemp.isOneToOneConversation =
            currentConversation?.type == Conversation.ConversationType.ROOM_TYPE_ONE_TO_ONE_CALL
        messageTemp.activeUser = conversationUser

        adapter?.update(messageTemp)
    }

    fun updateAdapterAfterSendReaction(message: ChatMessage, emoji: String) {
        if (message.reactions == null) {
            message.reactions = LinkedHashMap()
        }

        if (message.reactionsSelf == null) {
            message.reactionsSelf = ArrayList<String>()
        }

        var amount = message.reactions!![emoji]
        if (amount == null) {
            amount = 0
        }
        message.reactions!![emoji] = amount + 1
        message.reactionsSelf!!.add(emoji)
        adapter?.update(message)
    }

    private fun isShowMessageDeletionButton(message: ChatMessage): Boolean {
        if (conversationUser == null) return false

        val isUserAllowedByPrivileges = if (message.actorId == conversationUser.userId) {
            true
        } else {
            currentConversation!!.canModerate(conversationUser)
        }

        val isOlderThanSixHours = message
            .createdAt
            .before(Date(System.currentTimeMillis() - AGE_THRESHOLD_FOR_DELETE_MESSAGE))

        return when {
            !isUserAllowedByPrivileges -> false
            isOlderThanSixHours -> false
            message.systemMessageType != ChatMessage.SystemMessageType.DUMMY -> false
            message.isDeleted -> false
            message.hasFileAttachment() -> false
            OBJECT_MESSAGE == message.message -> false
            !CapabilitiesUtilNew.hasSpreedFeatureCapability(conversationUser, "delete-messages") -> false
            !hasChatPermission -> false
            else -> true
        }
    }

    override fun hasContentFor(message: ChatMessage, type: Byte): Boolean {
        return when (type) {
            CONTENT_TYPE_LOCATION -> message.hasGeoLocation()
            CONTENT_TYPE_VOICE_MESSAGE -> message.isVoiceMessage
            CONTENT_TYPE_POLL -> message.isPoll()
            CONTENT_TYPE_SYSTEM_MESSAGE -> !TextUtils.isEmpty(message.systemMessage)
            CONTENT_TYPE_UNREAD_NOTICE_MESSAGE -> message.id == "-1"
            else -> false
        }
    }

    @Subscribe(threadMode = ThreadMode.BACKGROUND)
    fun onMessageEvent(webSocketCommunicationEvent: WebSocketCommunicationEvent) {
        /*
        switch (webSocketCommunicationEvent.getType()) {
            case "refreshChat":

                if (
                webSocketCommunicationEvent
                .getHashMap().get(BundleKeys.KEY_INTERNAL_USER_ID)
                .equals(Long.toString(conversationUser.getId()))
                ) {
                    if (roomToken.equals(webSocketCommunicationEvent.getHashMap().get(BundleKeys.KEY_ROOM_TOKEN))) {
                        pullChatMessages(2);
                    }
                }
                break;
            default:
        }*/
    }

    @Subscribe(threadMode = ThreadMode.BACKGROUND)
    fun onMessageEvent(userMentionClickEvent: UserMentionClickEvent) {
        if (currentConversation?.type != Conversation.ConversationType.ROOM_TYPE_ONE_TO_ONE_CALL ||
            currentConversation?.name != userMentionClickEvent.userId
        ) {
            var apiVersion = 1
            // FIXME Fix API checking with guests?
            if (conversationUser != null) {
                apiVersion = ApiUtils.getConversationApiVersion(conversationUser, intArrayOf(ApiUtils.APIv4, 1))
            }

            val retrofitBucket = ApiUtils.getRetrofitBucketForCreateRoom(
                apiVersion,
                conversationUser?.baseUrl,
                "1",
                null,
                userMentionClickEvent.userId,
                null
            )

            ncApi.createRoom(
                credentials,
                retrofitBucket.url,
                retrofitBucket.queryMap
            )
                ?.subscribeOn(Schedulers.io())
                ?.observeOn(AndroidSchedulers.mainThread())
                ?.subscribe(object : Observer<RoomOverall> {
                    override fun onSubscribe(d: Disposable) {
                        // unused atm
                    }

                    override fun onNext(roomOverall: RoomOverall) {
                        val conversationIntent = Intent(activity, CallActivity::class.java)
                        val bundle = Bundle()
                        bundle.putParcelable(KEY_USER_ENTITY, conversationUser)
                        bundle.putString(KEY_ROOM_TOKEN, roomOverall.ocs!!.data!!.token)
                        bundle.putString(KEY_ROOM_ID, roomOverall.ocs!!.data!!.roomId)

                        if (conversationUser != null) {
                            bundle.putParcelable(
                                KEY_ACTIVE_CONVERSATION,
                                Parcels.wrap(roomOverall.ocs!!.data)
                            )
                            conversationIntent.putExtras(bundle)

                            ConductorRemapping.remapChatController(
                                router,
                                conversationUser.id!!,
                                roomOverall.ocs!!.data!!.token!!,
                                bundle,
                                false
                            )
                        } else {
                            conversationIntent.putExtras(bundle)
                            startActivity(conversationIntent)
                            Handler().postDelayed(
                                {
                                    if (!isDestroyed && !isBeingDestroyed) {
                                        router.popCurrentController()
                                    }
                                },
                                POP_CURRENT_CONTROLLER_DELAY
                            )
                        }
                    }

                    override fun onError(e: Throwable) {
                        // unused atm
                    }

                    override fun onComplete() {
                        // unused atm
                    }
                })
        }
    }

    fun sendPictureFromCamIntent() {
        if (!permissionUtil.isCameraPermissionGranted()) {
            requestCameraPermissions()
        } else {
            startActivityForResult(TakePhotoActivity.createIntent(context), REQUEST_CODE_PICK_CAMERA)
        }
    }

    fun sendVideoFromCamIntent() {
        if (!permissionUtil.isCameraPermissionGranted()) {
            requestCameraPermissions()
        } else {
            Intent(MediaStore.ACTION_VIDEO_CAPTURE).also { takeVideoIntent ->
                takeVideoIntent.resolveActivity(activity!!.packageManager)?.also {
                    val videoFile: File? = try {
                        val outputDir = context.cacheDir
                        val dateFormat = SimpleDateFormat(FILE_DATE_PATTERN, Locale.ROOT)
                        val date = dateFormat.format(Date())
                        val videoName = String.format(
                            context.resources.getString(R.string.nc_video_filename),
                            date
                        )
                        File("$outputDir/$videoName$VIDEO_SUFFIX")
                    } catch (e: IOException) {
                        Log.e(TAG, "error while creating video file", e)
                        null
                    }

                    videoFile?.also {
                        videoURI = FileProvider.getUriForFile(context, context.packageName, it)
                        takeVideoIntent.putExtra(MediaStore.EXTRA_OUTPUT, videoURI)
                        startActivityForResult(takeVideoIntent, REQUEST_CODE_PICK_CAMERA)
                    }
                }
            }
        }
    }

    fun createPoll() {
        val pollVoteDialog = PollCreateDialogFragment.newInstance(
            roomToken!!
        )
        pollVoteDialog.show(
            (activity as MainActivity?)!!.supportFragmentManager,
            TAG
        )
    }

    companion object {
        private const val TAG = "ChatController"
        private const val CONTENT_TYPE_SYSTEM_MESSAGE: Byte = 1
        private const val CONTENT_TYPE_UNREAD_NOTICE_MESSAGE: Byte = 2
        private const val CONTENT_TYPE_LOCATION: Byte = 3
        private const val CONTENT_TYPE_VOICE_MESSAGE: Byte = 4
        private const val CONTENT_TYPE_POLL: Byte = 5
        private const val NEW_MESSAGES_POPUP_BUBBLE_DELAY: Long = 200
        private const val POP_CURRENT_CONTROLLER_DELAY: Long = 100
        private const val LOBBY_TIMER_DELAY: Long = 5000
        private const val HTTP_CODE_OK: Int = 200
        private const val AGE_THRESHOLD_FOR_DELETE_MESSAGE: Int = 21600000 // (6 hours in millis = 6 * 3600 * 1000)
        private const val REQUEST_CODE_CHOOSE_FILE: Int = 555
        private const val REQUEST_CODE_SELECT_CONTACT: Int = 666
        private const val REQUEST_CODE_MESSAGE_SEARCH: Int = 777
        private const val REQUEST_RECORD_AUDIO_PERMISSION = 222
        private const val REQUEST_READ_CONTACT_PERMISSION = 234
        private const val REQUEST_CAMERA_PERMISSION = 223
        private const val REQUEST_CODE_PICK_CAMERA: Int = 333
        private const val REQUEST_CODE_SELECT_REMOTE_FILES = 888
        private const val OBJECT_MESSAGE: String = "{object}"
        private const val MINIMUM_VOICE_RECORD_DURATION: Int = 1000
        private const val VOICE_RECORD_CANCEL_SLIDER_X: Int = -50
        private const val VOICE_MESSAGE_META_DATA = "{\"messageType\":\"voice-message\"}"
        private const val VOICE_MESSAGE_FILE_SUFFIX = ".mp3"
        private const val FILE_DATE_PATTERN = "yyyy-MM-dd HH-mm-ss"
        private const val VIDEO_SUFFIX = ".mp4"
        private const val SHORT_VIBRATE: Long = 20
        private const val FULLY_OPAQUE_INT: Int = 255
        private const val SEMI_TRANSPARENT_INT: Int = 99
        private const val VOICE_MESSAGE_SEEKBAR_BASE: Int = 1000
        private const val SECOND: Long = 1000
        private const val NO_PREVIOUS_MESSAGE_ID: Int = -1
        private const val GROUPED_MESSAGES_THRESHOLD = 4
        private const val GROUPED_MESSAGES_SAME_AUTHOR_THRESHOLD = 5
        private const val TOOLBAR_AVATAR_RATIO = 1.5
        private const val HTTP_CODE_NOT_MODIFIED = 304
        private const val HTTP_CODE_PRECONDITION_FAILED = 412
        private const val QUOTED_MESSAGE_IMAGE_MAX_HEIGHT = 96f
        private const val MENTION_AUTO_COMPLETE_ELEVATION = 6f
        private const val MESSAGE_PULL_LIMIT = 100
        private const val INVITE_LENGTH = 6
        private const val ACTOR_LENGTH = 6
        private const val ANIMATION_DURATION: Long = 750
        private const val RETRIES: Long = 3
        private const val LOOKING_INTO_FUTURE_TIMEOUT = 30
        private const val CHUNK_SIZE: Int = 10
        private const val ONE_SECOND_IN_MILLIS = 1000
    }
}