From b4dad81019f94ac28c0fb9c4b619f0bc6c0838c2 Mon Sep 17 00:00:00 2001
From: rapterjet2004 <juliuslinus1@gmail.com>
Date: Fri, 17 Jul 2026 11:04:31 -0500
Subject: [PATCH] Adding Announcements and Channels Fixing state spreed
 capability bug with MessageInputFragment.kt Channel creation now works unify
 conversation attributes Reuse classified-attribute check via
 ConversationModel helper

Adds isClassifiedAttribute() next to isChannel()/isAnnouncement() on
ConversationModel, and has ConversationUtils.isClassified() compose it
instead of re-deriving the attribute bitmask check. The Conversation
(json model) overload is kept for CallActivity but marked deprecated
in favor of the ConversationModel one.

checkIfVoiceRoom()/isChannel()/isAnnouncement()/isClassifiedAttribute()
were declared on ConversationModel even though every other "does this
conversation satisfy X" predicate already lives in ConversationUtils.
Keeps the extension-function call syntax at all call sites, only the
import path changes. ConversationModel keeps mapToConversationModel(),
which is model construction rather than a business-rule predicate.

Move channel-preset capability check into ConversationUtils.isChannel

isChannel() was a raw attribute check, so every caller had to repeat
"conversation.isChannel() && hasSpreedFeatureCapability(..., ANNOUNCEMENT_PRESET)"
themselves. Renamed the raw checks to isChannelAttribute()/
isAnnouncementAttribute() (mirroring isClassifiedAttribute()) and added
a capability-gated isChannel(conversation, spreedCapabilities), mirroring
the existing isClassified()/isClassifiedAttribute() split. Callers now
call ConversationUtils.isChannel(...) directly.

Simplify capability handling in ChatViewModel.messagesFlow

spreedCapabilities was only needed inside the terminal map step of
messagesFlow (to filter system messages for channels), but it was
being combined into the outer flatMapLatest trigger. Any capabilities
emission unrelated to the conversation forced the whole message
source subscription to cancel and restart.

Move the capabilities dependency to a dedicated isChannelFlow
(conversationAndUserFlow + spreedCapabilities -> Boolean, with
distinctUntilChanged), and combine only that into the innermost step.
handleSystemMessages() now takes a plain Boolean instead of
ConversationModel/SpreedCapability, making it simpler to reason about
and test.

Implementing suggestions

Signed-off-by: rapterjet2004 <juliuslinus1@gmail.com>
---
 .gitignore                                    |   1 +
 .idea/codeStyles/Project.xml                  |  25 ----
 .../nextcloud/talk/activities/CallActivity.kt |   2 +-
 .../com/nextcloud/talk/api/NcApiCoroutines.kt |  11 +-
 .../com/nextcloud/talk/chat/ChatActivity.kt   |  12 +-
 .../talk/chat/MessageInputFragment.kt         |  35 ++++-
 .../talk/chat/ui/MessageActionsBottomSheet.kt |   3 +-
 .../talk/chat/viewmodels/ChatViewModel.kt     |  21 ++-
 .../ConversationCreationActivity.kt           |  97 ++++++++++---
 .../data/ConversationCreationRepository.kt    |   2 +
 .../ConversationCreationRepositoryImpl.kt     |   8 +-
 .../ConversationCreationViewModel.kt          | 129 ++++++++----------
 .../conversationinfo/CreateRoomRequest.kt     |  41 ++----
 .../viewmodel/ConversationInfoViewModel.kt    |   8 +-
 .../ConversationsListActivity.kt              |   2 +-
 .../talk/models/domain/ConversationModel.kt   |   5 -
 .../json/conversations/ConversationEnums.kt   |   8 +-
 .../nextcloud/talk/utils/CapabilitiesUtil.kt  |  11 ++
 .../nextcloud/talk/utils/ConversationUtils.kt |  25 +++-
 .../talk/utils/ParticipantPermissions.kt      |   3 +
 .../res/layout/fragment_message_input.xml     |  11 ++
 app/src/main/res/values/strings.xml           |   6 +
 22 files changed, 284 insertions(+), 182 deletions(-)

diff --git a/.gitignore b/.gitignore
index 98b5bf608e..4235132098 100644
--- a/.gitignore
+++ b/.gitignore
@@ -89,3 +89,4 @@ freeline_project_description.json
 
 /gradle/verification-keyring.gpg
 /.claude/settings.local.json
+/.artifacts/
diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
index 28b11af49d..1ae96897a2 100644
--- a/.idea/codeStyles/Project.xml
+++ b/.idea/codeStyles/Project.xml
@@ -2,31 +2,6 @@
   <code_scheme name="Project" version="173">
     <option name="CLASS_COUNT_TO_USE_IMPORT_ON_DEMAND" value="99" />
     <option name="NAMES_COUNT_TO_USE_IMPORT_ON_DEMAND" value="99" />
-    <option name="PACKAGES_TO_USE_IMPORT_ON_DEMAND">
-      <value />
-    </option>
-    <option name="IMPORT_LAYOUT_TABLE">
-      <value>
-        <package name="android" withSubpackages="true" static="false" />
-        <emptyLine />
-        <package name="com" withSubpackages="true" static="false" />
-        <emptyLine />
-        <package name="junit" withSubpackages="true" static="false" />
-        <emptyLine />
-        <package name="net" withSubpackages="true" static="false" />
-        <emptyLine />
-        <package name="org" withSubpackages="true" static="false" />
-        <emptyLine />
-        <package name="java" withSubpackages="true" static="false" />
-        <emptyLine />
-        <package name="javax" withSubpackages="true" static="false" />
-        <emptyLine />
-        <package name="" withSubpackages="true" static="false" />
-        <emptyLine />
-        <package name="" withSubpackages="true" static="true" />
-        <emptyLine />
-      </value>
-    </option>
     <option name="RIGHT_MARGIN" value="120" />
     <option name="WRAP_WHEN_TYPING_REACHES_RIGHT_MARGIN" value="true" />
     <JavaCodeStyleSettings>
diff --git a/app/src/main/java/com/nextcloud/talk/activities/CallActivity.kt b/app/src/main/java/com/nextcloud/talk/activities/CallActivity.kt
index eb02ac2f64..27366e7261 100644
--- a/app/src/main/java/com/nextcloud/talk/activities/CallActivity.kt
+++ b/app/src/main/java/com/nextcloud/talk/activities/CallActivity.kt
@@ -90,7 +90,6 @@ import com.nextcloud.talk.events.ProximitySensorEvent
 import com.nextcloud.talk.events.WebSocketCommunicationEvent
 import com.nextcloud.talk.models.ExternalSignalingServer
 import com.nextcloud.talk.models.domain.ConversationModel
-import com.nextcloud.talk.models.domain.ConversationModel.Companion.checkIfVoiceRoom
 import com.nextcloud.talk.models.json.capabilities.CapabilitiesOverall
 import com.nextcloud.talk.models.json.conversations.Conversation
 import com.nextcloud.talk.models.json.conversations.RoomOverall
@@ -117,6 +116,7 @@ import com.nextcloud.talk.utils.ApiUtils
 import com.nextcloud.talk.utils.CapabilitiesUtil
 import com.nextcloud.talk.utils.CapabilitiesUtil.hasSpreedFeatureCapability
 import com.nextcloud.talk.utils.CapabilitiesUtil.isCallRecordingAvailable
+import com.nextcloud.talk.utils.ConversationUtils.checkIfVoiceRoom
 import com.nextcloud.talk.utils.NotificationUtils.getCallRingtoneUri
 import com.nextcloud.talk.utils.ReceiverFlag
 import com.nextcloud.talk.utils.SpreedFeatures
diff --git a/app/src/main/java/com/nextcloud/talk/api/NcApiCoroutines.kt b/app/src/main/java/com/nextcloud/talk/api/NcApiCoroutines.kt
index e3a9d9c3cc..b616a6ae2a 100644
--- a/app/src/main/java/com/nextcloud/talk/api/NcApiCoroutines.kt
+++ b/app/src/main/java/com/nextcloud/talk/api/NcApiCoroutines.kt
@@ -19,12 +19,12 @@ import com.nextcloud.talk.models.json.chatprobeattachmentfolder.ProbeConversatio
 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.hovercard.HoverCardOverall
 import com.nextcloud.talk.models.json.invitation.InvitationOverall
 import com.nextcloud.talk.models.json.participants.AddParticipantOverall
 import com.nextcloud.talk.models.json.participants.TalkBan
 import com.nextcloud.talk.models.json.participants.TalkBanOverall
 import com.nextcloud.talk.models.json.profile.ProfileOverall
-import com.nextcloud.talk.models.json.hovercard.HoverCardOverall
 import com.nextcloud.talk.models.json.reactions.ReactionsOverall
 import com.nextcloud.talk.models.json.status.StatusOverall
 import com.nextcloud.talk.models.json.status.predefined.PredefinedStatusOverall
@@ -46,6 +46,7 @@ import retrofit2.Response
 import retrofit2.http.Body
 import retrofit2.http.DELETE
 import retrofit2.http.Field
+import retrofit2.http.FieldMap
 import retrofit2.http.FormUrlEncoded
 import retrofit2.http.GET
 import retrofit2.http.Header
@@ -82,6 +83,14 @@ interface NcApiCoroutines {
         @QueryMap options: Map<String, String>?
     ): RoomOverall
 
+    @FormUrlEncoded
+    @POST
+    suspend fun createRoomForm(
+        @Header("Authorization") authorization: String?,
+        @Url url: String?,
+        @FieldMap options: Map<String, String>?
+    ): RoomOverall
+
     @POST
     suspend fun createRoomWithBody(
         @Header("Authorization") authorization: String?,
diff --git a/app/src/main/java/com/nextcloud/talk/chat/ChatActivity.kt b/app/src/main/java/com/nextcloud/talk/chat/ChatActivity.kt
index 2d150b489b..b700ff83b0 100644
--- a/app/src/main/java/com/nextcloud/talk/chat/ChatActivity.kt
+++ b/app/src/main/java/com/nextcloud/talk/chat/ChatActivity.kt
@@ -133,7 +133,6 @@ import com.nextcloud.talk.jobs.UploadAndShareFilesWorker
 import com.nextcloud.talk.location.LocationPickerActivity
 import com.nextcloud.talk.models.ExternalSignalingServer
 import com.nextcloud.talk.models.domain.ConversationModel
-import com.nextcloud.talk.models.domain.ConversationModel.Companion.checkIfVoiceRoom
 import com.nextcloud.talk.models.json.capabilities.SpreedCapability
 import com.nextcloud.talk.models.json.chat.ChatMessageJson
 import com.nextcloud.talk.models.json.conversations.ConversationEnums
@@ -175,6 +174,7 @@ import com.nextcloud.talk.utils.CapabilitiesUtil.retentionOfClassifiedRoom
 import com.nextcloud.talk.utils.CapabilitiesUtil.retentionOfSIPRoom
 import com.nextcloud.talk.utils.ContactUtils
 import com.nextcloud.talk.utils.ConversationUtils
+import com.nextcloud.talk.utils.ConversationUtils.checkIfVoiceRoom
 import com.nextcloud.talk.utils.DateConstants
 import com.nextcloud.talk.utils.DateUtils
 import com.nextcloud.talk.utils.DisplayUtils
@@ -1989,7 +1989,8 @@ class ChatActivity :
             !isChatThread() &&
             !ConversationUtils.isNoteToSelfConversation(conversation) &&
             !isReadOnlyConversation() &&
-            !shouldShowLobby()
+            !shouldShowLobby() &&
+            !ConversationUtils.isChannel(conversation, spreedCapabilities)
 
     private fun isSearchAvailable(capabilitiesReady: Boolean, conversation: ConversationModel?): Boolean =
         capabilitiesReady &&
@@ -2267,8 +2268,11 @@ class ChatActivity :
     }
 
     private fun checkShowMessageInputView() {
+        val permissions = participantPermissionsFlow.value
+        val isChannel = ConversationUtils.isChannel(currentConversation, spreedCapabilities)
+
         if (isReadOnlyConversation() ||
-            participantPermissionsFlow.value?.hasChatPermission() == false
+            (permissions?.hasChatPermission() == false && (!isChannel || permissions.hasReactPermission() == false))
         ) {
             binding.fragmentContainerActivityChat.visibility = View.GONE
         } else {
@@ -2815,7 +2819,7 @@ class ChatActivity :
         )
     }
 
-    public override fun onDestroy() {
+    override fun onDestroy() {
         super.onDestroy()
         logConversationInfos("onDestroy")
 
diff --git a/app/src/main/java/com/nextcloud/talk/chat/MessageInputFragment.kt b/app/src/main/java/com/nextcloud/talk/chat/MessageInputFragment.kt
index 9340b02f53..24cd7f49d7 100644
--- a/app/src/main/java/com/nextcloud/talk/chat/MessageInputFragment.kt
+++ b/app/src/main/java/com/nextcloud/talk/chat/MessageInputFragment.kt
@@ -79,6 +79,7 @@ import com.nextcloud.talk.users.UserManager
 import com.nextcloud.talk.utils.ApiUtils
 import com.nextcloud.talk.utils.CapabilitiesUtil
 import com.nextcloud.talk.utils.CharPolicy
+import com.nextcloud.talk.utils.ConversationUtils
 import com.nextcloud.talk.utils.DateUtils
 import com.nextcloud.talk.utils.DisplayUtils
 import com.nextcloud.talk.utils.EmojiTextInputEditText
@@ -173,6 +174,12 @@ class MessageInputFragment : Fragment() {
             val threadTitle = text.toString()
             chatActivity.chatViewModel.messageDraft.threadTitle = threadTitle
         }
+
+        viewLifecycleOwner.lifecycleScope.launch {
+            chatActivity.participantPermissionsFlow.collect {
+                handleButtonsVisibility()
+            }
+        }
     }
 
     @Suppress("LongMethod")
@@ -186,6 +193,7 @@ class MessageInputFragment : Fragment() {
                     initVoiceRecordButton()
                     initThreadHandling()
                     updateScheduledMessagesAvailability(hasScheduledMessages)
+                    setReactionsOnly(state.spreedCapabilities)
                 }
 
                 is ChatViewModel.GetCapabilitiesInitialLoadState -> {
@@ -195,6 +203,7 @@ class MessageInputFragment : Fragment() {
                     initThreadHandling()
                     updateScheduledMessagesAvailability(hasScheduledMessages)
                     restoreState()
+                    setReactionsOnly(state.spreedCapabilities)
                 }
 
                 else -> {}
@@ -330,6 +339,17 @@ class MessageInputFragment : Fragment() {
         }
     }
 
+    private fun setReactionsOnly(spreedCapabilities: SpreedCapability) {
+        val isReactionOnly = isReactionOnlyMode(spreedCapabilities)
+        if (isReactionOnly) {
+            binding.fragmentMessageInputView.setVisible(false)
+            binding.reactionOnlyAffordance.setVisible(true)
+        } else {
+            binding.fragmentMessageInputView.setVisible(true)
+            binding.reactionOnlyAffordance.setVisible(false)
+        }
+    }
+
     private fun handleUI(isOnline: Boolean, connectionGained: Boolean) {
         if (isOnline) {
             if (connectionGained) {
@@ -694,16 +714,16 @@ class MessageInputFragment : Fragment() {
         }
     }
 
+    fun View.setVisible(isVisible: Boolean) {
+        visibility = if (isVisible) View.VISIBLE else View.GONE
+    }
+
     private fun handleButtonsVisibility() {
         if (!this::binding.isInitialized) {
             Log.w(TAG, "binding not initialized in handleButtonsVisibility")
             return
         }
 
-        fun View.setVisible(isVisible: Boolean) {
-            visibility = if (isVisible) View.VISIBLE else View.GONE
-        }
-
         val isEditModeActive = binding.fragmentEditView.editMessageView.isVisible
         val isThreadCreateModeActive = binding.fragmentCreateThreadView.createThreadView.isVisible
         val inputContainsText = binding.fragmentMessageInputView.messageInput.text.isNotEmpty()
@@ -1214,6 +1234,13 @@ class MessageInputFragment : Fragment() {
         return jsonId != null
     }
 
+    private fun isReactionOnlyMode(spreedCapabilities: SpreedCapability): Boolean {
+        val conversation = chatActivity.currentConversation
+        val permissions = chatActivity.participantPermissionsFlow.value
+        val isChannel = ConversationUtils.isChannel(conversation, spreedCapabilities)
+        return isChannel && permissions?.hasChatPermission() == false && permissions.hasReactPermission() == true
+    }
+
     companion object {
         fun newInstance() = MessageInputFragment()
         private val TAG: String = MessageInputFragment::class.java.simpleName
diff --git a/app/src/main/java/com/nextcloud/talk/chat/ui/MessageActionsBottomSheet.kt b/app/src/main/java/com/nextcloud/talk/chat/ui/MessageActionsBottomSheet.kt
index 5e83a3cf37..c28bb2cf29 100644
--- a/app/src/main/java/com/nextcloud/talk/chat/ui/MessageActionsBottomSheet.kt
+++ b/app/src/main/java/com/nextcloud/talk/chat/ui/MessageActionsBottomSheet.kt
@@ -181,7 +181,8 @@ internal fun buildMessageActionsState(
     val messageIsEditable = hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.EDIT_MESSAGES) &&
         (messageHasRegularText || messageHasCaptions) &&
         !isOlderThanTwentyFourHours &&
-        isUserAllowedByPrivileges
+        isUserAllowedByPrivileges &&
+        hasChatPermission
     val isMessageEditable = isNoTimeLimitOnNoteToSelf || messageIsEditable || isMessageBotOneToOne
 
     val hasDeleteMessagesUnlimitedCapability =
diff --git a/app/src/main/java/com/nextcloud/talk/chat/viewmodels/ChatViewModel.kt b/app/src/main/java/com/nextcloud/talk/chat/viewmodels/ChatViewModel.kt
index 996346fe5d..b59aa01f70 100644
--- a/app/src/main/java/com/nextcloud/talk/chat/viewmodels/ChatViewModel.kt
+++ b/app/src/main/java/com/nextcloud/talk/chat/viewmodels/ChatViewModel.kt
@@ -35,6 +35,7 @@ import com.nextcloud.talk.conversationlist.DirectShareHelper
 import com.nextcloud.talk.conversationlist.data.OfflineConversationsRepository
 import com.nextcloud.talk.conversationlist.data.network.OfflineFirstConversationsRepository
 import com.nextcloud.talk.conversationlist.viewmodels.ConversationsListViewModel.Companion.FOLLOWED_THREADS_EXIST
+import com.nextcloud.talk.dagger.modules.ApplicationScope
 import com.nextcloud.talk.data.database.mappers.toDomainModel
 import com.nextcloud.talk.data.database.model.ChatMessageEntity
 import com.nextcloud.talk.data.user.model.User
@@ -80,7 +81,6 @@ import io.reactivex.Observer
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.Disposable
 import io.reactivex.schedulers.Schedulers
-import com.nextcloud.talk.dagger.modules.ApplicationScope
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -493,6 +493,11 @@ class ChatViewModel @AssistedInject constructor(
                 replay = 1
             )
 
+    private val isChannelFlow: Flow<Boolean> =
+        combine(conversationAndUserFlow, spreedCapabilities) { (conversation, _), capabilities ->
+            ConversationUtils.isChannel(conversation, capabilities)
+        }.distinctUntilChanged()
+
     // ------------------------------
     // Messages
     // ------------------------------
@@ -528,10 +533,10 @@ class ChatViewModel @AssistedInject constructor(
                             .distinctUntilChanged()
                             .mapToChatMessages(user.userId!!)
                     }
-            }
-            .map { messages ->
-                messages.let(::handleSystemMessages)
-                    .let(::handleThreadMessages)
+                    .combine(isChannelFlow) { messages, isChannel ->
+                        handleSystemMessages(messages, isChannel)
+                            .let(::handleThreadMessages)
+                    }
             }
             .distinctUntilChanged()
 
@@ -1364,7 +1369,11 @@ class ChatViewModel @AssistedInject constructor(
         }
         Log.d(TAG, "fetchNewMessagesWithRetry: no new messages after $POST_UPLOAD_FETCH_MAX_ATTEMPTS attempts")
     }
-    private fun handleSystemMessages(chatMessageList: List<ChatMessage>): List<ChatMessage> {
+    private fun handleSystemMessages(chatMessageList: List<ChatMessage>, isChannel: Boolean): List<ChatMessage> {
+        if (isChannel) {
+            return chatMessageList.filter { !it.isSystemMessage }
+        }
+
         fun shouldRemoveMessage(currentMessage: MutableMap.MutableEntry<Int, ChatMessage>): Boolean =
             isInfoMessageAboutDeletion(currentMessage) ||
                 isReactionsMessage(currentMessage) ||
diff --git a/app/src/main/java/com/nextcloud/talk/conversationcreation/ConversationCreationActivity.kt b/app/src/main/java/com/nextcloud/talk/conversationcreation/ConversationCreationActivity.kt
index 7475b04b93..4b95fe11b5 100644
--- a/app/src/main/java/com/nextcloud/talk/conversationcreation/ConversationCreationActivity.kt
+++ b/app/src/main/java/com/nextcloud/talk/conversationcreation/ConversationCreationActivity.kt
@@ -43,7 +43,9 @@ import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.Campaign
 import androidx.compose.material.icons.outlined.Chat
+import androidx.compose.material.icons.outlined.Podcasts
 import androidx.compose.material.icons.outlined.VolumeUp
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
@@ -57,6 +59,7 @@ import androidx.compose.material3.LocalContentColor
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
@@ -386,30 +389,68 @@ fun ConversationNameAndDescription(conversationCreationViewModel: ConversationCr
 @Composable
 fun ConversationPresets(conversationCreationViewModel: ConversationCreationViewModel) {
     val preset by conversationCreationViewModel.conversationPreset
+    val hasAnnouncementPresetCapability = CapabilitiesUtil.hasSpreedFeatureCapability(
+        conversationCreationViewModel.currentUser.capabilities?.spreedCapability,
+        SpreedFeatures.ANNOUNCEMENT_PRESET
+    )
+    val showAnnouncementPreset = hasAnnouncementPresetCapability &&
+        CapabilitiesUtil.isAdmin(conversationCreationViewModel.currentUser.capabilities?.spreedCapability)
 
-    Row(
+    Column(
         modifier = Modifier
             .fillMaxWidth()
             .padding(16.dp),
-        horizontalArrangement = Arrangement.spacedBy(12.dp)
+        verticalArrangement = Arrangement.spacedBy(12.dp)
     ) {
-        SelectableCard(
-            modifier = Modifier.weight(1f),
-            title = stringResource(R.string.default_room),
-            subtitle = stringResource(R.string.default_room_preset),
-            icon = Icons.Outlined.Chat,
-            isSelected = preset == "default",
-            onClick = { conversationCreationViewModel.conversationPreset.value = "default" }
-        )
+        Row(
+            horizontalArrangement = Arrangement.spacedBy(12.dp)
+        ) {
+            SelectableCard(
+                modifier = Modifier.weight(1f),
+                title = stringResource(R.string.default_room),
+                subtitle = stringResource(R.string.default_room_preset),
+                icon = Icons.Outlined.Chat,
+                isSelected = preset == "default",
+                onClick = { conversationCreationViewModel.updateConversationPreset("default") }
+            )
 
-        SelectableCard(
-            modifier = Modifier.weight(1f),
-            title = stringResource(R.string.voice_room),
-            subtitle = stringResource(R.string.voice_room_preset),
-            icon = Icons.Outlined.VolumeUp,
-            isSelected = preset == "voiceroom",
-            onClick = { conversationCreationViewModel.conversationPreset.value = "voiceroom" }
-        )
+            SelectableCard(
+                modifier = Modifier.weight(1f),
+                title = stringResource(R.string.voice_room),
+                subtitle = stringResource(R.string.voice_room_preset),
+                icon = Icons.Outlined.VolumeUp,
+                isSelected = preset == "voiceroom",
+                onClick = { conversationCreationViewModel.updateConversationPreset("voiceroom") }
+            )
+        }
+
+        if (hasAnnouncementPresetCapability) {
+            Row(
+                horizontalArrangement = Arrangement.spacedBy(12.dp)
+            ) {
+                SelectableCard(
+                    modifier = Modifier.weight(1f),
+                    title = stringResource(R.string.nc_channel),
+                    subtitle = stringResource(R.string.nc_channel_description),
+                    icon = Icons.Outlined.Podcasts,
+                    isSelected = preset == "channel",
+                    onClick = { conversationCreationViewModel.updateConversationPreset("channel") }
+                )
+
+                if (showAnnouncementPreset) {
+                    SelectableCard(
+                        modifier = Modifier.weight(1f),
+                        title = stringResource(R.string.nc_announcement),
+                        subtitle = stringResource(R.string.nc_announcement_description),
+                        icon = Icons.Outlined.Campaign,
+                        isSelected = preset == "announcement",
+                        onClick = { conversationCreationViewModel.updateConversationPreset("announcement") }
+                    )
+                } else {
+                    Spacer(modifier = Modifier.weight(1f))
+                }
+            }
+        }
     }
 }
 
@@ -421,7 +462,8 @@ fun SelectableCard(
     subtitle: String,
     icon: ImageVector,
     isSelected: Boolean,
-    onClick: () -> Unit
+    onClick: () -> Unit,
+    badgeText: String? = null
 ) {
     val borderColor = if (isSelected) Color.LightGray else Color.Transparent
     val borderWidth = 1.dp
@@ -449,10 +491,25 @@ fun SelectableCard(
             Text(
                 text = title,
                 fontWeight = FontWeight.Bold,
-                fontSize = 15.sp
+                fontSize = 15.sp,
+                modifier = Modifier.weight(1f, fill = false)
             )
         }
 
+        if (badgeText != null) {
+            Surface(
+                color = MaterialTheme.colorScheme.primaryContainer,
+                shape = RoundedCornerShape(4.dp)
+            ) {
+                Text(
+                    text = badgeText,
+                    modifier = Modifier.padding(horizontal = 4.dp, vertical = 2.dp),
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.onPrimaryContainer
+                )
+            }
+        }
+
         Spacer(modifier = Modifier.height(12.dp))
 
         Text(
diff --git a/app/src/main/java/com/nextcloud/talk/conversationcreation/data/ConversationCreationRepository.kt b/app/src/main/java/com/nextcloud/talk/conversationcreation/data/ConversationCreationRepository.kt
index 25f93a8f71..7f3decfb7a 100644
--- a/app/src/main/java/com/nextcloud/talk/conversationcreation/data/ConversationCreationRepository.kt
+++ b/app/src/main/java/com/nextcloud/talk/conversationcreation/data/ConversationCreationRepository.kt
@@ -7,6 +7,7 @@
 
 package com.nextcloud.talk.conversationcreation.data
 
+import com.nextcloud.talk.conversationinfo.CreateRoomRequest
 import com.nextcloud.talk.data.user.model.User
 import com.nextcloud.talk.models.RetrofitBucket
 import com.nextcloud.talk.models.domain.ConversationModel
@@ -26,6 +27,7 @@ interface ConversationCreationRepository {
     suspend fun openConversation(credentials: String?, url: String, roomToken: String, scope: Int): GenericOverall
     suspend fun addParticipants(credentials: String?, retrofitBucket: RetrofitBucket): AddParticipantOverall
     suspend fun createRoom(credentials: String?, retrofitBucket: RetrofitBucket): RoomOverall
+    suspend fun createRoomWithBody(credentials: String?, url: String, body: CreateRoomRequest): RoomOverall
     suspend fun setPassword(credentials: String?, url: String, roomToken: String, password: String): GenericOverall
     suspend fun uploadConversationAvatar(
         credentials: String?,
diff --git a/app/src/main/java/com/nextcloud/talk/conversationcreation/data/ConversationCreationRepositoryImpl.kt b/app/src/main/java/com/nextcloud/talk/conversationcreation/data/ConversationCreationRepositoryImpl.kt
index 7feec977a3..a7cedd0cf9 100644
--- a/app/src/main/java/com/nextcloud/talk/conversationcreation/data/ConversationCreationRepositoryImpl.kt
+++ b/app/src/main/java/com/nextcloud/talk/conversationcreation/data/ConversationCreationRepositoryImpl.kt
@@ -8,6 +8,7 @@
 package com.nextcloud.talk.conversationcreation.data
 
 import com.nextcloud.talk.api.NcApiCoroutines
+import com.nextcloud.talk.conversationinfo.CreateRoomRequest
 import com.nextcloud.talk.data.user.model.User
 import com.nextcloud.talk.models.RetrofitBucket
 import com.nextcloud.talk.models.domain.ConversationModel
@@ -58,7 +59,7 @@ class ConversationCreationRepositoryImpl @Inject constructor(private val ncApiCo
     }
 
     override suspend fun createRoom(credentials: String?, retrofitBucket: RetrofitBucket): RoomOverall {
-        val response = ncApiCoroutines.createRoom(
+        val response = ncApiCoroutines.createRoomForm(
             credentials,
             retrofitBucket.url,
             retrofitBucket.queryMap
@@ -66,6 +67,11 @@ class ConversationCreationRepositoryImpl @Inject constructor(private val ncApiCo
         return response
     }
 
+    override suspend fun createRoomWithBody(credentials: String?, url: String, body: CreateRoomRequest): RoomOverall {
+        val response = ncApiCoroutines.createRoomWithBody(credentials, url, body)
+        return response
+    }
+
     override suspend fun setPassword(
         credentials: String?,
         url: String,
diff --git a/app/src/main/java/com/nextcloud/talk/conversationcreation/viewmodel/ConversationCreationViewModel.kt b/app/src/main/java/com/nextcloud/talk/conversationcreation/viewmodel/ConversationCreationViewModel.kt
index 550bb0d9ca..a61e92b07b 100644
--- a/app/src/main/java/com/nextcloud/talk/conversationcreation/viewmodel/ConversationCreationViewModel.kt
+++ b/app/src/main/java/com/nextcloud/talk/conversationcreation/viewmodel/ConversationCreationViewModel.kt
@@ -14,15 +14,12 @@ import androidx.core.net.toFile
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.nextcloud.talk.conversationcreation.data.ConversationCreationRepository
+import com.nextcloud.talk.conversationinfo.CreateRoomRequest
 import com.nextcloud.talk.data.user.model.User
-import com.nextcloud.talk.models.RetrofitBucket
 import com.nextcloud.talk.models.json.autocomplete.AutocompleteUser
 import com.nextcloud.talk.models.json.conversations.Conversation
-import com.nextcloud.talk.models.json.generic.GenericMeta
-import com.nextcloud.talk.repositories.conversations.ConversationsRepositoryImpl.Companion.STATUS_CODE_OK
 import com.nextcloud.talk.utils.ApiUtils
-import com.nextcloud.talk.utils.ApiUtils.getRetrofitBucketForAddParticipant
-import com.nextcloud.talk.utils.ApiUtils.getRetrofitBucketForAddParticipantWithSource
+import com.nextcloud.talk.utils.ParticipantPermissions
 import com.nextcloud.talk.utils.database.user.CurrentUserProviderOld
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -96,7 +93,6 @@ class ConversationCreationViewModel @Inject constructor(
     var isConversationAvailableForRegisteredUsers = mutableStateOf(false)
     val conversationPreset = mutableStateOf("default")
     var openForGuestAppUsers = mutableStateOf(false)
-    private val addParticipantsViewState = MutableStateFlow<AddParticipantsUiState>(AddParticipantsUiState.None)
     private val allowGuestsResult = MutableStateFlow<AllowGuestsUiState>(AllowGuestsUiState.None)
     fun updateRoomName(roomName: String) {
         _roomName.value = roomName
@@ -110,6 +106,24 @@ class ConversationCreationViewModel @Inject constructor(
         _conversationDescription.value = conversationDescription
     }
 
+    fun updateConversationPreset(preset: String) {
+        conversationPreset.value = preset
+        when (preset) {
+            "default", "voiceroom" -> {
+                isConversationAvailableForRegisteredUsers.value = false
+                openForGuestAppUsers.value = false
+            }
+            "channel" -> {
+                isConversationAvailableForRegisteredUsers.value = true
+                openForGuestAppUsers.value = false
+            }
+            "announcement" -> {
+                isConversationAvailableForRegisteredUsers.value = false
+                openForGuestAppUsers.value = false
+            }
+        }
+    }
+
     @Suppress("Detekt.TooGenericExceptionCaught", "LongMethod")
     fun createRoomAndAddParticipants(
         roomType: String,
@@ -134,16 +148,24 @@ class ConversationCreationViewModel @Inject constructor(
             try {
                 val apiVersion =
                     ApiUtils.getConversationApiVersion(_currentUser, intArrayOf(ApiUtils.API_V4, ApiUtils.API_V1))
-                val retrofitBucket: RetrofitBucket = ApiUtils.getRetrofitBucketForCreateRoom(
-                    version = apiVersion,
-                    baseUrl = _currentUser.baseUrl,
-                    roomType = roomType,
-                    preset = preset,
-                    conversationName = conversationName
-                )
-                val roomResult = repository.createRoom(
+                val url = ApiUtils.getUrlForRooms(apiVersion, _currentUser.baseUrl)
+                val body = CreateRoomRequest().apply {
+                    this.roomType = roomType
+                    this.roomName = conversationName
+                    this.preset = preset
+                    this.description = _conversationDescription.value
+                    this.listable = scope
+                    this.participants = convertAutocompleteUserToParticipants(participants)
+
+                    if (preset == "channel" || preset == "announcement") {
+                        this.permissions = ParticipantPermissions.DEFAULT_GROUP_PERMISSIONS and
+                            ParticipantPermissions.CHAT.inv()
+                    }
+                }
+                val roomResult = repository.createRoomWithBody(
                     credentials,
-                    retrofitBucket
+                    url,
+                    body
                 )
                 val conversation = roomResult.ocs?.data
 
@@ -151,66 +173,6 @@ class ConversationCreationViewModel @Inject constructor(
                     val token = conversation.token
                     if (token != null) {
                         try {
-                            val apiVersion = ApiUtils.getConversationApiVersion(
-                                _currentUser,
-                                intArrayOf(ApiUtils.API_V4, ApiUtils.API_V1)
-                            )
-                            val url = ApiUtils.getUrlForConversationDescription(
-                                apiVersion,
-                                _currentUser.baseUrl,
-                                token
-                            )
-
-                            repository.setConversationDescription(
-                                credentials,
-                                url,
-                                token,
-                                _conversationDescription.value
-                            )
-
-                            val urlForRoomPublic = ApiUtils.getUrlForRoomPublic(
-                                apiVersion,
-                                _currentUser.baseUrl!!,
-                                token
-                            )
-                            val allowGuestResultOverall = repository.allowGuests(
-                                credentials,
-                                urlForRoomPublic,
-                                token,
-                                isGuestsAllowed.value
-                            )
-                            val statusCode: GenericMeta? = allowGuestResultOverall.ocs?.meta
-                            val result = (statusCode?.statusCode == STATUS_CODE_OK)
-                            if (result) {
-                                allowGuestsResult.value = AllowGuestsUiState.Success(result)
-                                for (participant in participants) {
-                                    if (participant.id != null) {
-                                        val retrofitBucket: RetrofitBucket = if (participant.source!! == "users") {
-                                            getRetrofitBucketForAddParticipant(
-                                                apiVersion,
-                                                _currentUser.baseUrl,
-                                                token,
-                                                participant.id!!
-                                            )
-                                        } else {
-                                            getRetrofitBucketForAddParticipantWithSource(
-                                                apiVersion,
-                                                _currentUser.baseUrl,
-                                                token,
-                                                participant.source!!,
-                                                participant.id!!
-                                            )
-                                        }
-
-                                        val participantOverall = repository.addParticipants(
-                                            credentials,
-                                            retrofitBucket
-                                        ).ocs?.data
-                                        addParticipantsViewState.value =
-                                            AddParticipantsUiState.Success(participantOverall)
-                                    }
-                                }
-                            }
                             if (_password.value.isNotEmpty()) {
                                 val url = ApiUtils.getUrlForRoomPassword(
                                     apiVersion,
@@ -257,6 +219,23 @@ class ConversationCreationViewModel @Inject constructor(
         }
     }
 
+    private fun convertAutocompleteUserToParticipants(
+        autocompleteUsers: Set<AutocompleteUser>
+    ): com.nextcloud.talk.conversationinfo.Participants {
+        val participants = com.nextcloud.talk.conversationinfo.Participants()
+        autocompleteUsers.forEach { autocompleteUser ->
+            when (autocompleteUser.source) {
+                "groups" -> participants.groups.add(autocompleteUser.id!!)
+                "emails" -> participants.emails.add(autocompleteUser.id!!)
+                "circles" -> participants.teams.add(autocompleteUser.id!!)
+                "federated" -> participants.federatedUsers.add(autocompleteUser.id!!)
+                "phones" -> participants.phones.add(autocompleteUser.id!!)
+                else -> participants.users.add(autocompleteUser.id!!)
+            }
+        }
+        return participants
+    }
+
     fun getImageUri(avatarId: String, requestBigSize: Boolean, isDarkMode: Boolean): String =
         ApiUtils.getUrlForAvatar(_currentUser.baseUrl, avatarId, requestBigSize, darkMode = isDarkMode)
 
diff --git a/app/src/main/java/com/nextcloud/talk/conversationinfo/CreateRoomRequest.kt b/app/src/main/java/com/nextcloud/talk/conversationinfo/CreateRoomRequest.kt
index 9aa8b6b027..9fdcde9b0c 100644
--- a/app/src/main/java/com/nextcloud/talk/conversationinfo/CreateRoomRequest.kt
+++ b/app/src/main/java/com/nextcloud/talk/conversationinfo/CreateRoomRequest.kt
@@ -16,6 +16,12 @@ data class CreateRoomRequest(
     var roomType: String,
     @JsonField(name = ["roomName"])
     var roomName: String? = null,
+    @JsonField(name = ["invite"])
+    var invite: String? = null,
+    @JsonField(name = ["source"])
+    var source: String? = null,
+    @JsonField(name = ["preset"])
+    var preset: String? = null,
     @JsonField(name = ["objectType"])
     var objectType: String? = null,
     @JsonField(name = ["objectId"])
@@ -23,23 +29,23 @@ data class CreateRoomRequest(
     @JsonField(name = ["password"])
     var password: String? = null,
     @JsonField(name = ["readOnly"])
-    var readOnly: Int,
+    var readOnly: Int? = null,
     @JsonField(name = ["listable"])
-    var listable: Int,
+    var listable: Int? = null,
     @JsonField(name = ["messageExpiration"])
     var messageExpiration: Int? = null,
     @JsonField(name = ["lobbyState"])
     var lobbyState: Int? = null,
     @JsonField(name = ["lobbyTimer"])
-    var lobbyTimer: Int,
+    var lobbyTimer: Int? = null,
     @JsonField(name = ["sipEnabled"])
-    var sipEnabled: Int,
+    var sipEnabled: Int? = null,
     @JsonField(name = ["permissions"])
-    var permissions: Int,
+    var permissions: Int? = null,
     @JsonField(name = ["recordingConsent"])
-    var recordingConsent: Int,
+    var recordingConsent: Int? = null,
     @JsonField(name = ["mentionPermissions"])
-    var mentionPermissions: Int,
+    var mentionPermissions: Int? = null,
     @JsonField(name = ["description"])
     var description: String? = null,
     @JsonField(name = ["emoji"])
@@ -49,24 +55,5 @@ data class CreateRoomRequest(
     @JsonField(name = ["participants"])
     var participants: Participants? = null
 ) {
-    constructor() : this(
-        0.toString(),
-        "",
-        "",
-        "",
-        "",
-        0,
-        0,
-        0,
-        0,
-        0,
-        0,
-        0,
-        0,
-        0,
-        "",
-        "",
-        "",
-        Participants()
-    )
+    constructor() : this(roomType = "2")
 }
diff --git a/app/src/main/java/com/nextcloud/talk/conversationinfo/viewmodel/ConversationInfoViewModel.kt b/app/src/main/java/com/nextcloud/talk/conversationinfo/viewmodel/ConversationInfoViewModel.kt
index 018a71ff10..8f22abe857 100644
--- a/app/src/main/java/com/nextcloud/talk/conversationinfo/viewmodel/ConversationInfoViewModel.kt
+++ b/app/src/main/java/com/nextcloud/talk/conversationinfo/viewmodel/ConversationInfoViewModel.kt
@@ -427,6 +427,9 @@ class ConversationInfoViewModel @Inject constructor(
         val showMessageExpiration = isModerator &&
             hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.MESSAGE_EXPIRATION)
 
+        val isChannel = ConversationUtils.isChannel(conversationModel, spreedCapabilities)
+        val showParticipants = if (isChannel) isModerator else true
+
         val credentials = ApiUtils.getCredentials(user.username, user.token) ?: ""
 
         _uiState.update { state ->
@@ -477,12 +480,15 @@ class ConversationInfoViewModel @Inject constructor(
                 isArchived = isArchived,
                 canLeave = canLeave,
                 canDelete = canDelete,
+                showParticipants = showParticipants,
                 showClearHistory = showClearHistory,
                 showEditButton = showEditButton
             )
         }
 
-        loadParticipants(user, token)
+        if (showParticipants) {
+            loadParticipants(user, token)
+        }
     }
 
     @Suppress("Detekt.TooGenericExceptionCaught")
diff --git a/app/src/main/java/com/nextcloud/talk/conversationlist/ConversationsListActivity.kt b/app/src/main/java/com/nextcloud/talk/conversationlist/ConversationsListActivity.kt
index d330d84a0c..5ace6396dc 100644
--- a/app/src/main/java/com/nextcloud/talk/conversationlist/ConversationsListActivity.kt
+++ b/app/src/main/java/com/nextcloud/talk/conversationlist/ConversationsListActivity.kt
@@ -65,7 +65,6 @@ import com.nextcloud.talk.jobs.DeleteConversationWorker
 import com.nextcloud.talk.jobs.LeaveConversationWorker
 import com.nextcloud.talk.jobs.UploadAndShareFilesWorker
 import com.nextcloud.talk.models.domain.ConversationModel
-import com.nextcloud.talk.models.domain.ConversationModel.Companion.checkIfVoiceRoom
 import com.nextcloud.talk.models.domain.SearchMessageEntry
 import com.nextcloud.talk.models.json.conversations.ConversationEnums
 import com.nextcloud.talk.settings.SettingsActivity
@@ -83,6 +82,7 @@ import com.nextcloud.talk.utils.CapabilitiesUtil.hasSpreedFeatureCapability
 import com.nextcloud.talk.utils.CapabilitiesUtil.isServerEOL
 import com.nextcloud.talk.utils.ClosedInterfaceImpl
 import com.nextcloud.talk.utils.ConversationUtils
+import com.nextcloud.talk.utils.ConversationUtils.checkIfVoiceRoom
 import com.nextcloud.talk.utils.FileUtils
 import com.nextcloud.talk.utils.Mimetype
 import com.nextcloud.talk.utils.NotificationUtils
diff --git a/app/src/main/java/com/nextcloud/talk/models/domain/ConversationModel.kt b/app/src/main/java/com/nextcloud/talk/models/domain/ConversationModel.kt
index e0ae62452f..a4e41c3ee4 100644
--- a/app/src/main/java/com/nextcloud/talk/models/domain/ConversationModel.kt
+++ b/app/src/main/java/com/nextcloud/talk/models/domain/ConversationModel.kt
@@ -76,11 +76,6 @@ data class ConversationModel(
 ) {
 
     companion object {
-        fun ConversationModel?.checkIfVoiceRoom(): Boolean =
-            this?.attributes?.let {
-                it and ConversationEnums.Preset.VOICE_ROOM.ordinal != 0
-            } ?: false
-
         @Suppress("LongMethod")
         fun mapToConversationModel(conversation: Conversation, user: User): ConversationModel =
             ConversationModel(
diff --git a/app/src/main/java/com/nextcloud/talk/models/json/conversations/ConversationEnums.kt b/app/src/main/java/com/nextcloud/talk/models/json/conversations/ConversationEnums.kt
index 1066c423c9..28db2f8e07 100644
--- a/app/src/main/java/com/nextcloud/talk/models/json/conversations/ConversationEnums.kt
+++ b/app/src/main/java/com/nextcloud/talk/models/json/conversations/ConversationEnums.kt
@@ -51,8 +51,10 @@ class ConversationEnums {
         CLASSIFIED
     }
 
-    enum class Preset {
-        DEFAULT,
-        VOICE_ROOM
+    companion object {
+        const val ATTRIBUTE_IS_VOICE_ROOM = 1
+        const val ATTRIBUTE_IS_CLASSIFIED = 4
+        const val ATTRIBUTE_IS_CHANNEL = 8
+        const val ATTRIBUTE_IS_ANNOUNCEMENT = 16
     }
 }
diff --git a/app/src/main/java/com/nextcloud/talk/utils/CapabilitiesUtil.kt b/app/src/main/java/com/nextcloud/talk/utils/CapabilitiesUtil.kt
index ca41c1279f..0c9f9a47a8 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/CapabilitiesUtil.kt
+++ b/app/src/main/java/com/nextcloud/talk/utils/CapabilitiesUtil.kt
@@ -68,6 +68,7 @@ enum class SpreedFeatures(val value: String) {
     REACT_PERMISSION("react-permission"),
     CONVERSATION_PRESETS("conversation-presets"),
     CLASSIFIED_CONVERSATIONS("classified-conversations"),
+    ANNOUNCEMENT_PRESET("announcement-preset"),
     CONVERSATION_TAGS("conversation-tags")
 }
 
@@ -298,6 +299,16 @@ object CapabilitiesUtil {
     fun isBanningAvailable(spreedCapabilities: SpreedCapability): Boolean =
         hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.BAN_V1)
 
+    fun isAdmin(spreedCapabilities: SpreedCapability?): Boolean {
+        if (spreedCapabilities?.config?.containsKey("conversations") == true) {
+            val map = spreedCapabilities.config!!["conversations"]
+            if (map?.containsKey("is-admin") == true) {
+                return map["is-admin"].toString().toBoolean()
+            }
+        }
+        return false
+    }
+
     // endregion
 
     //region SpreedCapabilities that can't be used with federation as the settings for them are global
diff --git a/app/src/main/java/com/nextcloud/talk/utils/ConversationUtils.kt b/app/src/main/java/com/nextcloud/talk/utils/ConversationUtils.kt
index 6af15ccc1e..d47b53739b 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/ConversationUtils.kt
+++ b/app/src/main/java/com/nextcloud/talk/utils/ConversationUtils.kt
@@ -8,12 +8,12 @@ package com.nextcloud.talk.utils
 
 import com.nextcloud.talk.models.domain.ConversationModel
 import com.nextcloud.talk.models.json.capabilities.SpreedCapability
+import com.nextcloud.talk.models.json.conversations.Conversation
 import com.nextcloud.talk.models.json.conversations.ConversationEnums
 import com.nextcloud.talk.models.json.participants.Participant
 
 object ConversationUtils {
     private val TAG = ConversationUtils::class.java.simpleName
-    private const val CLASSIFIED_ATTRIBUTE_BIT = 4
 
     fun isPublic(conversation: ConversationModel): Boolean =
         ConversationEnums.ConversationType.ROOM_PUBLIC_CALL == conversation.type
@@ -60,14 +60,25 @@ object ConversationUtils {
         currentConversation != null &&
             currentConversation.type == ConversationEnums.ConversationType.NOTE_TO_SELF
 
+    private fun ConversationModel?.hasAttribute(flag: Int): Boolean =
+        this?.attributes?.let { it and flag != 0 } ?: false
+
+    fun ConversationModel?.checkIfVoiceRoom(): Boolean = hasAttribute(ConversationEnums.ATTRIBUTE_IS_VOICE_ROOM)
+    fun ConversationModel?.isClassifiedAttribute(): Boolean = hasAttribute(ConversationEnums.ATTRIBUTE_IS_CLASSIFIED)
+    fun ConversationModel?.isChannelAttribute(): Boolean = hasAttribute(ConversationEnums.ATTRIBUTE_IS_CHANNEL)
+    fun ConversationModel?.isAnnouncementAttribute(): Boolean =
+        hasAttribute(ConversationEnums.ATTRIBUTE_IS_ANNOUNCEMENT)
+
+    fun isChannel(conversation: ConversationModel?, spreedCapabilities: SpreedCapability?): Boolean =
+        conversation.isChannelAttribute() &&
+            CapabilitiesUtil.hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.ANNOUNCEMENT_PRESET)
+
     fun isClassified(conversation: ConversationModel, spreedCapabilities: SpreedCapability?): Boolean =
         CapabilitiesUtil.hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.CLASSIFIED_CONVERSATIONS) &&
-            ((conversation.attributes ?: 0) and CLASSIFIED_ATTRIBUTE_BIT) != 0
+            conversation.isClassifiedAttribute()
 
-    fun isClassified(
-        conversation: com.nextcloud.talk.models.json.conversations.Conversation,
-        spreedCapabilities: SpreedCapability?
-    ): Boolean =
+    @Deprecated("Use isClassified(conversation: ConversationModel, spreedCapabilities: SpreedCapability?)")
+    fun isClassified(conversation: Conversation, spreedCapabilities: SpreedCapability?): Boolean =
         CapabilitiesUtil.hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.CLASSIFIED_CONVERSATIONS) &&
-            ((conversation.attributes ?: 0) and CLASSIFIED_ATTRIBUTE_BIT) != 0
+            ((conversation.attributes ?: 0) and ConversationEnums.ATTRIBUTE_IS_CLASSIFIED) != 0
 }
diff --git a/app/src/main/java/com/nextcloud/talk/utils/ParticipantPermissions.kt b/app/src/main/java/com/nextcloud/talk/utils/ParticipantPermissions.kt
index 536d99281e..33d7e83650 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/ParticipantPermissions.kt
+++ b/app/src/main/java/com/nextcloud/talk/utils/ParticipantPermissions.kt
@@ -93,5 +93,8 @@ class ParticipantPermissions(
         const val PUBLISH_SCREEN = 64
         const val CHAT = 128
         const val REACT = 256
+
+        const val DEFAULT_GROUP_PERMISSIONS =
+            JOIN_CALL or PUBLISH_AUDIO or PUBLISH_VIDEO or PUBLISH_SCREEN or CHAT or REACT
     }
 }
diff --git a/app/src/main/res/layout/fragment_message_input.xml b/app/src/main/res/layout/fragment_message_input.xml
index 63f3c12e18..5b35ed0b75 100644
--- a/app/src/main/res/layout/fragment_message_input.xml
+++ b/app/src/main/res/layout/fragment_message_input.xml
@@ -71,6 +71,17 @@
                 android:animateLayoutChanges="true"
                 android:inputType="textLongMessage|textAutoComplete"
                 android:maxLength="1000" />
+
+            <com.google.android.material.textview.MaterialTextView
+                android:id="@+id/reactionOnlyAffordance"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:padding="@dimen/standard_margin"
+                android:gravity="center"
+                android:text="@string/nc_channel_only_moderators_can_post"
+                android:textColor="@color/medium_emphasis_text"
+                android:visibility="gone"
+                tools:visibility="visible" />
         </LinearLayout>
     </com.google.android.material.card.MaterialCardView>
 </LinearLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index e5bff88844..b106ced931 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -83,6 +83,12 @@ How to translate with transifex:
 
     <string name="nc_search">Search</string>
     <string name="nc_search_clear">Clear search</string>
+    <string name="nc_channel_only_moderators_can_post">Only moderators can post in this channel</string>
+    <string name="nc_channel">Channel</string>
+    <string name="nc_channel_description">Only moderators can post, everybody else can only react</string>
+    <string name="nc_announcement">Announcement</string>
+    <string name="nc_announcement_description">Conversation for admins to inform a fixed audience, which cannot be left.</string>
+    <string name="nc_admin_only">Admin only</string>
 
     <string name="nc_certificate_dialog_title">Check out the certificate</string>
     <string name="nc_certificate_dialog_text">Do you trust the until now unknown SSL certificate, issued by %1$s for %2$s, valid from %3$s to %4$s?</string>