Support for Blocking and Reporting Users/Posts

app/src/main/java/com/vitorpamplona/amethyst/EncryptedStorage.kt

@@ -4,9 +4,9 @@ import android.content.Context
 import androidx.security.crypto.EncryptedSharedPreferences
 import androidx.security.crypto.MasterKeys
 
-class KeyStorage {
+class EncryptedStorage {
 
-  fun encryptedPreferences(context: Context): EncryptedSharedPreferences {
+  fun preferences(context: Context): EncryptedSharedPreferences {
     val secretKey: String = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC);
     val preferencesName = "secret_keeper"
 

app/src/main/java/com/vitorpamplona/amethyst/LocalPreferences.kt

@@ -0,0 +1,50 @@
+package com.vitorpamplona.amethyst
+
+import android.content.Context
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.DefaultChannels
+import com.vitorpamplona.amethyst.model.toByteArray
+import nostr.postr.Persona
+import nostr.postr.toHex
+
+class LocalPreferences(context: Context) {
+  val encryptedPreferences = EncryptedStorage().preferences(context)
+
+  fun clearEncryptedStorage() {
+    encryptedPreferences.edit().apply {
+      remove("nostr_privkey")
+      remove("nostr_pubkey")
+      remove("following_channels")
+      remove("hidden_users")
+    }.apply()
+  }
+
+  fun saveToEncryptedStorage(account: Account) {
+    encryptedPreferences.edit().apply {
+      account.loggedIn.privKey?.let { putString("nostr_privkey", it.toHex()) }
+      account.loggedIn.pubKey.let { putString("nostr_pubkey", it.toHex()) }
+      account.followingChannels.let { putStringSet("following_channels", it) }
+      account.hiddenUsers.let { putStringSet("hidden_users", it) }
+    }.apply()
+  }
+
+  fun loadFromEncryptedStorage(): Account? {
+    encryptedPreferences.apply {
+      val privKey = getString("nostr_privkey", null)
+      val pubKey = getString("nostr_pubkey", null)
+      val followingChannels = getStringSet("following_channels", DefaultChannels)?.toMutableSet() ?: DefaultChannels.toMutableSet()
+      val hiddenUsers = getStringSet("hidden_users", emptySet())?.toMutableSet() ?: mutableSetOf()
+
+      if (pubKey != null) {
+        return Account(
+          Persona(privKey = privKey?.toByteArray(), pubKey = pubKey.toByteArray()),
+          followingChannels,
+          hiddenUsers
+        )
+      } else {
+        return null
+      }
+    }
+  }
+
+}

app/src/main/java/com/vitorpamplona/amethyst/ServiceManager.kt

@@ -36,6 +36,13 @@ object ServiceManager {
       NostrNotificationDataSource.account = myAccount
       NostrChatroomListDataSource.account = myAccount
 
+      NostrGlobalDataSource.account = myAccount
+      NostrChannelDataSource.account = myAccount
+
+      NostrUserProfileDataSource.account = myAccount
+      NostrUserProfileFollowsDataSource.account = myAccount
+      NostrUserProfileFollowersDataSource.account = myAccount
+
       NostrAccountDataSource.start()
       NostrGlobalDataSource.start()
       NostrHomeDataSource.start()

app/src/main/java/com/vitorpamplona/amethyst/lnurl/LnInvoiceUtil.kt

@@ -1,5 +1,6 @@
 package com.vitorpamplona.amethyst.lnurl
 
+import androidx.compose.ui.text.toLowerCase
 import java.math.BigDecimal
 import java.util.Locale
 import java.util.regex.Pattern
@@ -128,7 +129,7 @@ object LnInvoiceUtil {
   }
 
   private fun multiplier(multiplier: String): BigDecimal {
-    return when (multiplier) {
+    return when (multiplier.toLowerCase()) {
       "m" -> BigDecimal("0.001")
       "u" -> BigDecimal("0.000001")
       "n" -> BigDecimal("0.000000001")

app/src/main/java/com/vitorpamplona/amethyst/model/Account.kt

@@ -10,8 +10,12 @@ import com.vitorpamplona.amethyst.service.model.RepostEvent
 import com.vitorpamplona.amethyst.service.relays.Client
 import com.vitorpamplona.amethyst.service.relays.Relay
 import com.vitorpamplona.amethyst.service.relays.RelayPool
-import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
 import java.util.Date
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
 import nostr.postr.Contact
 import nostr.postr.Persona
 import nostr.postr.Utils
@@ -27,8 +31,11 @@ val DefaultChannels = setOf(
   "42224859763652914db53052103f0b744df79dfc4efef7e950fc0802fc3df3c5"  // -> Amethyst's Group
 )
 
-class Account(val loggedIn: Persona, val followingChannels: MutableSet<String> = DefaultChannels.toMutableSet()) {
+class Account(
-  var seeReplies: Boolean = true
+  val loggedIn: Persona,
+  val followingChannels: MutableSet<String> = DefaultChannels.toMutableSet(),
+  val hiddenUsers: MutableSet<String> = DefaultChannels.toMutableSet()
+) {
 
   fun userProfile(): User {
     return LocalCache.getOrCreateUser(loggedIn.pubKey)
@@ -38,6 +45,10 @@ class Account(val loggedIn: Persona, val followingChannels: MutableSet<String> =
     return followingChannels.map { LocalCache.getOrCreateChannel(it) }
   }
 
+  fun hiddenUsers(): List<User> {
+    return hiddenUsers.map { LocalCache.getOrCreateUser(it.toByteArray()) }
+  }
+
   fun isWriteable(): Boolean {
     return loggedIn.privKey != null
   }
@@ -79,7 +90,7 @@ class Account(val loggedIn: Persona, val followingChannels: MutableSet<String> =
   fun reactTo(note: Note) {
     if (!isWriteable()) return
 
-    if (note.reactions.firstOrNull { it.author == userProfile() } != null) {
+    if (note.reactions.firstOrNull { it.author == userProfile() && it.event?.content == "+️" } != null) {
       // has already liked this note
       return
     }
@@ -91,6 +102,23 @@ class Account(val loggedIn: Persona, val followingChannels: MutableSet<String> =
     }
   }
 
+  fun report(note: Note) {
+    if (!isWriteable()) return
+
+    if (
+      note.reactions.firstOrNull { it.author == userProfile() && it.event?.content == "⚠️"} != null
+    ) {
+      // has already liked this note
+      return
+    }
+
+    note.event?.let {
+      val event = ReactionEvent.createWarning(it, loggedIn.privKey!!)
+      Client.send(event)
+      LocalCache.consume(event)
+    }
+  }
+
   fun boost(note: Note) {
     if (!isWriteable()) return
 
@@ -186,7 +214,7 @@ class Account(val loggedIn: Persona, val followingChannels: MutableSet<String> =
     LocalCache.consume(signedEvent)
   }
 
-  fun sendCreateNewChannel(name: String, about: String, picture: String, accountStateViewModel: AccountStateViewModel) {
+  fun sendCreateNewChannel(name: String, about: String, picture: String) {
     if (!isWriteable()) return
 
     val metadata = ChannelCreateEvent.ChannelData(
@@ -201,17 +229,25 @@ class Account(val loggedIn: Persona, val followingChannels: MutableSet<String> =
     Client.send(event)
     LocalCache.consume(event)
 
-    joinChannel(event.id.toHex(), accountStateViewModel)
+    joinChannel(event.id.toHex())
   }
 
-  fun joinChannel(idHex: String, accountStateViewModel: AccountStateViewModel) {
+  fun joinChannel(idHex: String) {
     followingChannels.add(idHex)
-    accountStateViewModel.saveToEncryptedStorage(this)
   }
 
-  fun leaveChannel(idHex: String, accountStateViewModel: AccountStateViewModel) {
+  fun leaveChannel(idHex: String) {
     followingChannels.remove(idHex)
-    accountStateViewModel.saveToEncryptedStorage(this)
+  }
+
+  fun hideUser(pubkeyHex: String) {
+    hiddenUsers.add(pubkeyHex)
+    invalidateData()
+  }
+
+  fun showUser(pubkeyHex: String) {
+    hiddenUsers.remove(pubkeyHex)
+    invalidateData()
   }
 
   fun sendChangeChannel(name: String, about: String, picture: String, channel: Channel) {
@@ -280,25 +316,44 @@ class Account(val loggedIn: Persona, val followingChannels: MutableSet<String> =
   // Observers line up here.
   val live: AccountLiveData = AccountLiveData(this)
 
-  private fun refreshObservers() {
+  // Refreshes observers in batches.
+  var handlerWaiting = false
+  @Synchronized
+  fun invalidateData() {
+    if (handlerWaiting) return
+
+    handlerWaiting = true
+    val scope = CoroutineScope(Job() + Dispatchers.Default)
+    scope.launch {
+      delay(100)
       live.refresh()
+      handlerWaiting = false
+    }
   }
 
 
+  fun isAcceptable(user: User): Boolean {
+    return user !in hiddenUsers()  // if user hasn't hided this author
+  }
+
+  fun isAcceptableDirect(note: Note): Boolean {
+    return note.reports.firstOrNull { it.author == userProfile() } == null // if user has not reported this post
+        && note.reports.filter { it.author in userProfile().follows }.size < 5 // if it has 5 reports by reliable users
+  }
+
+  fun isAcceptable(note: Note): Boolean {
+    return note.author?.let { isAcceptable(it) } ?: true // if user hasn't hided this author
+        && isAcceptableDirect(note)
+        && (note.event !is ReactionEvent
+          || (note.event is ReactionEvent && note.replyTo?.firstOrNull { isAcceptableDirect(note) } == null)
+        ) // is not a reaction about a blocked post
+  }
 }
 
 class AccountLiveData(private val account: Account): LiveData<AccountState>(AccountState(account)) {
   fun refresh() {
     postValue(AccountState(account))
   }
-
-  override fun onActive() {
-    super.onActive()
-  }
-
-  override fun onInactive() {
-    super.onInactive()
-  }
 }
 
 class AccountState(val account: Account)

app/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt

@@ -256,6 +256,13 @@ object LocalCache {
         it.addReaction(note)
       }
     }
+
+    if (event.content == "\u26A0\uFE0F") {
+      // Counts the replies
+      repliesTo.forEach {
+        it.addReport(note)
+      }
+    }
   }
 
   fun consume(event: ChannelCreateEvent) {

app/src/main/java/com/vitorpamplona/amethyst/model/Note.kt

@@ -35,6 +35,8 @@ class Note(val idHex: String) {
     val reactions = Collections.synchronizedSet(mutableSetOf<Note>())
     val boosts = Collections.synchronizedSet(mutableSetOf<Note>())
 
+    val reports = Collections.synchronizedSet(mutableSetOf<Note>())
+
     var channel: Channel? = null
 
     fun loadEvent(event: Event, author: User, mentions: List<User>, replyTo: MutableList<Note>) {
@@ -88,6 +90,11 @@ class Note(val idHex: String) {
             invalidateData()
     }
 
+    fun addReport(note: Note) {
+        if (reports.add(note))
+            invalidateData()
+    }
+
     fun isReactedBy(user: User): Boolean {
         return synchronized(reactions) {
             reactions.any { it.author == user }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrChannelDataSource.kt

@@ -1,11 +1,13 @@
 package com.vitorpamplona.amethyst.service
 
+import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
 import nostr.postr.JsonFilter
 
 object NostrChannelDataSource: NostrDataSource<Note>("ChatroomFeed") {
+  lateinit var account: Account
   var channel: com.vitorpamplona.amethyst.model.Channel? = null
 
   fun loadMessagesBetween(channelId: String) {
@@ -28,7 +30,7 @@ object NostrChannelDataSource: NostrDataSource<Note>("ChatroomFeed") {
 
   // returns the last Note of each user.
   override fun feed(): List<Note> {
-    return channel?.notes?.values?.sortedBy { it.event?.createdAt } ?: emptyList()
+    return channel?.notes?.values?.filter { account.isAcceptable(it) }?.sortedBy { it.event?.createdAt } ?: emptyList()
   }
 
   override fun updateChannelFilters() {

app/src/main/java/com/vitorpamplona/amethyst/service/NostrChatRoomDataSource.kt

@@ -33,7 +33,7 @@ object NostrChatRoomDataSource: NostrDataSource<Note>("ChatroomFeed") {
 
   // returns the last Note of each user.
   override fun feed(): List<Note> {
-    val messages = account.userProfile().messages[withUser]
+    val messages = account.userProfile().messages[withUser]?.filter { account.isAcceptable(it) }
 
     return messages?.sortedBy { it.event?.createdAt } ?: emptyList()
   }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrChatroomListDataSource.kt

@@ -64,14 +64,14 @@ object NostrChatroomListDataSource: NostrDataSource<Note>("MailBoxFeed") {
   // returns the last Note of each user.
   override fun feed(): List<Note> {
     val messages = account.userProfile().messages
-    val messagingWith = messages.keys().toList()
+    val messagingWith = messages.keys().toList().filter { account.isAcceptable(it) }
 
     val privateMessages = messagingWith.mapNotNull {
       messages[it]?.sortedBy { it.event?.createdAt }?.lastOrNull { it.event != null }
     }
 
     val publicChannels = account.followingChannels().map {
-      it.notes.values.sortedBy { it.event?.createdAt }.lastOrNull { it.event != null }
+      it.notes.values.filter { account.isAcceptable(it) }.sortedBy { it.event?.createdAt }.lastOrNull { it.event != null }
     }
 
     val channelsCreatedByMe = LocalCache.channels.values.filter {

app/src/main/java/com/vitorpamplona/amethyst/service/NostrGlobalDataSource.kt

@@ -1,11 +1,13 @@
 package com.vitorpamplona.amethyst.service
 
+import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.Note
 import nostr.postr.JsonFilter
 import nostr.postr.events.TextNoteEvent
 
 object NostrGlobalDataSource: NostrDataSource<Note>("GlobalFeed") {
+  lateinit var account: Account
   fun createGlobalFilter() = JsonFilter(
     kinds = listOf(TextNoteEvent.kind),
     limit = 50
@@ -14,6 +16,7 @@ object NostrGlobalDataSource: NostrDataSource<Note>("GlobalFeed") {
   val globalFeedChannel = requestNewChannel()
 
   override fun feed() = LocalCache.notes.values
+    .filter { account.isAcceptable(it) }
     .filter {
       it.event is TextNoteEvent && (it.event as TextNoteEvent).replyTos.isEmpty()
     }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrHiddenAccountsDataSource.kt

@@ -0,0 +1,16 @@
+package com.vitorpamplona.amethyst.service
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.User
+import nostr.postr.JsonFilter
+import nostr.postr.events.TextNoteEvent
+
+object NostrHiddenAccountsDataSource: NostrDataSource<User>("HiddenAccounts") {
+  lateinit var account: Account
+
+  override fun feed() = account.hiddenUsers()
+
+  override fun updateChannelFilters() {}
+}

app/src/main/java/com/vitorpamplona/amethyst/service/NostrHomeDataSource.kt

@@ -82,6 +82,7 @@ object NostrHomeDataSource: NostrDataSource<Note>("HomeFeed") {
 
     return LocalCache.notes.values
       .filter { (it.event is TextNoteEvent || it.event is RepostEvent) && it.author?.pubkeyHex in allowSet }
+      .filter { account.isAcceptable(it) }
       .sortedBy { it.event?.createdAt }
       .reversed()
   }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrNotificationDataSource.kt

@@ -18,7 +18,7 @@ object NostrNotificationDataSource: NostrDataSource<Note>("NotificationFeed") {
   override fun feed(): List<Note> {
     val set = account.userProfile().taggedPosts
     val filtered = synchronized(set) {
-      set.filter { it.event != null }
+      set.filter { it.event != null }.filter { account.isAcceptable(it) }
     }
 
     return filtered.sortedBy { it.event?.createdAt }.reversed()

app/src/main/java/com/vitorpamplona/amethyst/service/NostrUserProfileDataSource.kt

@@ -1,5 +1,6 @@
 package com.vitorpamplona.amethyst.service
 
+import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
@@ -8,6 +9,7 @@ import nostr.postr.events.MetadataEvent
 import nostr.postr.events.TextNoteEvent
 
 object NostrUserProfileDataSource: NostrDataSource<Note>("UserProfileFeed") {
+  lateinit var account: Account
   var user: User? = null
 
   fun loadUserProfile(userId: String) {
@@ -37,7 +39,7 @@ object NostrUserProfileDataSource: NostrDataSource<Note>("UserProfileFeed") {
   override fun feed(): List<Note> {
     val notes = user?.notes ?: return emptyList()
     val sortedNotes = synchronized(notes) {
-      notes.sortedBy { it.event?.createdAt }
+      notes.filter { account.isAcceptable(it) }.sortedBy { it.event?.createdAt }
     }
     return sortedNotes.reversed()
   }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrUserProfileFollowersDataSource.kt

@@ -1,11 +1,13 @@
 package com.vitorpamplona.amethyst.service
 
+import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.User
 import nostr.postr.JsonFilter
 import nostr.postr.events.ContactListEvent
 
 object NostrUserProfileFollowersDataSource: NostrDataSource<User>("UserProfileFollowerFeed") {
+  lateinit var account: Account
   var user: User? = null
 
   fun loadUserProfile(userId: String) {
@@ -24,7 +26,7 @@ object NostrUserProfileFollowersDataSource: NostrDataSource<User>("UserProfileFo
     val followers = user?.followers ?: emptyList()
 
     return synchronized(followers) {
-      followers.toList()
+      followers.filter { account.isAcceptable(it) }.toList()
     }
   }
 

app/src/main/java/com/vitorpamplona/amethyst/service/NostrUserProfileFollowsDataSource.kt

@@ -1,11 +1,13 @@
 package com.vitorpamplona.amethyst.service
 
+import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.User
 import nostr.postr.JsonFilter
 import nostr.postr.events.ContactListEvent
 
 object NostrUserProfileFollowsDataSource: NostrDataSource<User>("UserProfileFollowsFeed") {
+  lateinit var account: Account
   var user: User? = null
 
   fun loadUserProfile(userId: String) {
@@ -24,7 +26,11 @@ object NostrUserProfileFollowsDataSource: NostrDataSource<User>("UserProfileFoll
   val followChannel = requestNewChannel()
 
   override fun feed(): List<User> {
-    return user?.follows?.toList() ?: emptyList()
+    val follows = user?.follows ?: emptyList()
+
+    return synchronized(follows) {
+      follows.filter { account.isAcceptable(it) }.toList()
+    }
   }
 
   override fun updateChannelFilters() {

app/src/main/java/com/vitorpamplona/amethyst/service/model/ReactionEvent.kt

@@ -25,6 +25,10 @@ class ReactionEvent (
   companion object {
     const val kind = 7
 
+    fun createWarning(originalNote: Event, privateKey: ByteArray, createdAt: Long = Date().time / 1000): ReactionEvent {
+      return create("\u26A0\uFE0F", originalNote, privateKey, createdAt)
+    }
+
     fun createLike(originalNote: Event, privateKey: ByteArray, createdAt: Long = Date().time / 1000): ReactionEvent {
       return create("+", originalNote, privateKey, createdAt)
     }

app/src/main/java/com/vitorpamplona/amethyst/ui/MainActivity.kt

@@ -14,21 +14,9 @@ import coil.ImageLoader
 import coil.decode.GifDecoder
 import coil.decode.ImageDecoderDecoder
 import coil.decode.SvgDecoder
-import com.vitorpamplona.amethyst.KeyStorage
+import com.vitorpamplona.amethyst.EncryptedStorage
+import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.ServiceManager
-import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.service.NostrAccountDataSource
-import com.vitorpamplona.amethyst.service.NostrChannelDataSource
-import com.vitorpamplona.amethyst.service.NostrChatroomListDataSource
-import com.vitorpamplona.amethyst.service.NostrGlobalDataSource
-import com.vitorpamplona.amethyst.service.NostrHomeDataSource
-import com.vitorpamplona.amethyst.service.NostrNotificationDataSource
-import com.vitorpamplona.amethyst.service.NostrSingleEventDataSource
-import com.vitorpamplona.amethyst.service.NostrSingleUserDataSource
-import com.vitorpamplona.amethyst.service.NostrThreadDataSource
-import com.vitorpamplona.amethyst.service.NostrUserProfileDataSource
-import com.vitorpamplona.amethyst.service.NostrUserProfileFollowersDataSource
-import com.vitorpamplona.amethyst.service.NostrUserProfileFollowsDataSource
 import com.vitorpamplona.amethyst.service.relays.Client
 import com.vitorpamplona.amethyst.ui.screen.AccountScreen
 import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
@@ -57,7 +45,7 @@ class MainActivity : ComponentActivity() {
         Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colors.background) {
 
           val accountViewModel: AccountStateViewModel = viewModel {
-            AccountStateViewModel(KeyStorage().encryptedPreferences(applicationContext))
+            AccountStateViewModel(LocalPreferences(applicationContext))
           }
 
           AccountScreen(accountViewModel)

app/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewChannelView.kt

@@ -15,6 +15,7 @@ import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
@@ -26,10 +27,11 @@ import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
 @Composable
-fun NewChannelView(onClose: () -> Unit, account: Account, accountStateViewModel: AccountStateViewModel, channel: Channel? = null) {
+fun NewChannelView(onClose: () -> Unit, account: Account, channel: Channel? = null) {
     val postViewModel: NewChannelViewModel = viewModel()
+    val context = LocalContext.current.applicationContext
 
-    postViewModel.load(account, channel, accountStateViewModel)
+    postViewModel.load(account, channel)
 
     Dialog(
         onDismissRequest = { onClose() },
@@ -55,7 +57,7 @@ fun NewChannelView(onClose: () -> Unit, account: Account, accountStateViewModel:
 
                     PostButton(
                         onPost = {
-                            postViewModel.create()
+                            postViewModel.create(context)
                             onClose()
                         },
                         postViewModel.channelName.value.text.isNotBlank()

app/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewChannelViewModel.kt

@@ -1,25 +1,26 @@
 package com.vitorpamplona.amethyst.ui.actions
 
+import android.content.Context
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.lifecycle.ViewModel
+import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.Channel
 import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import nostr.postr.toHex
 
 class NewChannelViewModel: ViewModel() {
     private var account: Account? = null
     private var originalChannel: Channel? = null
-    private var accountStateViewModel: AccountStateViewModel? = null
 
     val channelName = mutableStateOf(TextFieldValue())
     val channelPicture = mutableStateOf(TextFieldValue())
     val channelDescription = mutableStateOf(TextFieldValue())
 
 
-    fun load(account: Account, channel: Channel?, accountStateViewModel: AccountStateViewModel) {
+    fun load(account: Account, channel: Channel?) {
-        this.accountStateViewModel = accountStateViewModel
         this.account = account
         if (channel != null) {
             originalChannel = channel
@@ -29,21 +30,24 @@ class NewChannelViewModel: ViewModel() {
         }
     }
 
-    fun create() {
+    fun create(context: Context) {
-        if (originalChannel == null)
+        this.account?.let { account ->
-            this.account?.sendCreateNewChannel(
+            if (originalChannel == null) {
+                account.sendCreateNewChannel(
                     channelName.value.text,
                     channelDescription.value.text,
-                channelPicture.value.text,
+                    channelPicture.value.text
-                accountStateViewModel!!
                 )
-        else
+
-            this.account?.sendChangeChannel(
+                LocalPreferences(context).saveToEncryptedStorage(account)
+            } else
+                account.sendChangeChannel(
                     channelName.value.text,
                     channelDescription.value.text,
                     channelPicture.value.text,
                     originalChannel!!
                 )
+        }
 
         clear()
     }

app/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewPostView.kt

@@ -23,6 +23,7 @@ import androidx.compose.material.Text
 import androidx.compose.material.TextFieldDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.ExperimentalComposeUiApi
 import androidx.compose.ui.Modifier
@@ -67,7 +68,7 @@ fun NewPostView(onClose: () -> Unit, baseReplyTo: Note? = null, account: Account
     val context = LocalContext.current
 
     // initialize focus reference to be able to request focus programmatically
-    val focusRequester = FocusRequester()
+    val focusRequester = remember { FocusRequester() }
     val keyboardController = LocalSoftwareKeyboardController.current
 
     LaunchedEffect(Unit) {

app/src/main/java/com/vitorpamplona/amethyst/ui/buttons/NewChannelButton.kt

@@ -28,13 +28,13 @@ import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
 @Composable
-fun NewChannelButton(account: Account, accountStateViewModel: AccountStateViewModel) {
+fun NewChannelButton(account: Account) {
     var wantsToPost by remember {
         mutableStateOf(false)
     }
 
     if (wantsToPost)
-        NewChannelView({ wantsToPost = false }, account = account, accountStateViewModel)
+        NewChannelView({ wantsToPost = false }, account = account)
 
     OutlinedButton(
         onClick = { wantsToPost = true },

app/src/main/java/com/vitorpamplona/amethyst/ui/navigation/DrawerContent.kt

@@ -162,6 +162,8 @@ fun ListContent(
     modifier: Modifier,
     accountViewModel: AccountStateViewModel
 ) {
+    val coroutineScope = rememberCoroutineScope()
+
     Column(modifier = modifier) {
         LazyColumn() {
             item {
@@ -178,14 +180,19 @@ fun ListContent(
                     thickness = 0.25.dp
                 )
                 Column(modifier = modifier.padding(horizontal = 25.dp)) {
+                    Row(modifier = Modifier.clickable(onClick = {
+                        navController.navigate(Route.Filters.route)
+                        coroutineScope.launch {
+                            scaffoldState.drawerState.close()
+                        }
+                    })) {
                         Text(
-                        text = "Settings",
+                            text = "Security Filters",
                             fontSize = 18.sp,
                             fontWeight = W500
                         )
-                    Row(
+                    }
-                        modifier = Modifier.clickable(onClick = { accountViewModel.logOff() }),
+                    Row(modifier = Modifier.clickable(onClick = { accountViewModel.logOff() })) {
-                    ) {
                         Text(
                             text = "Log out",
                             modifier = Modifier.padding(vertical = 15.dp),

app/src/main/java/com/vitorpamplona/amethyst/ui/navigation/Routes.kt

@@ -14,6 +14,7 @@ import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
 import com.vitorpamplona.amethyst.ui.screen.ChannelScreen
 import com.vitorpamplona.amethyst.ui.screen.ChatroomListScreen
 import com.vitorpamplona.amethyst.ui.screen.ChatroomScreen
+import com.vitorpamplona.amethyst.ui.screen.FiltersScreen
 import com.vitorpamplona.amethyst.ui.screen.HomeScreen
 import com.vitorpamplona.amethyst.ui.screen.NotificationScreen
 import com.vitorpamplona.amethyst.ui.screen.ProfileScreen
@@ -32,6 +33,7 @@ sealed class Route(
     object Search : Route("Search", R.drawable.ic_search, buildScreen = { acc, accSt, nav -> { _ -> SearchScreen(acc, nav) }})
     object Notification : Route("Notification", R.drawable.ic_notifications,buildScreen = { acc, accSt, nav -> { _ -> NotificationScreen(acc, nav) }})
     object Message : Route("Message", R.drawable.ic_dm, buildScreen = { acc, accSt, nav -> { _ -> ChatroomListScreen(acc, nav) }})
+    object Filters : Route("Filters", R.drawable.ic_dm, buildScreen = { acc, accSt, nav -> { _ -> FiltersScreen(acc, nav) }})
 
     object Profile : Route("User/{id}", R.drawable.ic_profile,
         arguments = listOf(navArgument("id") { type = NavType.StringType } ),
@@ -65,7 +67,8 @@ val Routes = listOf(
     Route.Profile,
     Route.Note,
     Route.Room,
-    Route.Channel
+    Route.Channel,
+    Route.Filters
 )
 
 @Composable

app/src/main/java/com/vitorpamplona/amethyst/ui/note/BlankNote.kt

@@ -26,7 +26,38 @@ fun BlankNote(modifier: Modifier = Modifier, isQuote: Boolean = false) {
           verticalAlignment = Alignment.CenterVertically
         ) {
           Text(
-            text = "Referenced event not found",
+            text = "Referenced post not found",
+            modifier = Modifier.padding(30.dp),
+            color = Color.Gray,
+          )
+        }
+
+        Divider(
+          modifier = Modifier.padding(vertical = 10.dp),
+          thickness = 0.25.dp
+        )
+      }
+    }
+  }
+}
+
+
+@Composable
+fun HiddenNote(modifier: Modifier = Modifier, isQuote: Boolean = false) {
+  Column(modifier = modifier) {
+    Row(modifier = Modifier.padding(horizontal = if (!isQuote) 12.dp else 6.dp)) {
+      Column(modifier = Modifier.padding(start = if (!isQuote) 10.dp else 5.dp)) {
+        Row(
+          modifier = Modifier.padding(
+            start = 20.dp,
+            end = 20.dp,
+            bottom = 25.dp,
+            top = 15.dp
+          ),
+          verticalAlignment = Alignment.CenterVertically
+        ) {
+          Text(
+            text = "Post was flagged as inappropriate",
             modifier = Modifier.padding(30.dp),
             color = Color.Gray,
           )

app/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -15,6 +15,7 @@ import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material.Divider
 import androidx.compose.material.DropdownMenu
 import androidx.compose.material.DropdownMenuItem
+import androidx.compose.material.LocalContentColor
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
@@ -27,6 +28,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
@@ -46,6 +48,9 @@ import nostr.postr.toNpub
 @OptIn(ExperimentalFoundationApi::class)
 @Composable
 fun NoteCompose(baseNote: Note, modifier: Modifier = Modifier, isInnerNote: Boolean = false, accountViewModel: AccountViewModel, navController: NavController) {
+    val accountState by accountViewModel.accountLiveData.observeAsState()
+    val account = accountState?.account
+
     val noteState by baseNote.live.observeAsState()
     val note = noteState?.note
 
@@ -56,6 +61,11 @@ fun NoteCompose(baseNote: Note, modifier: Modifier = Modifier, isInnerNote: Bool
             onClick = {  },
             onLongClick = { popupExpanded = true },
         ), isInnerNote)
+    } else if (account?.isAcceptable(note) == false) {
+        HiddenNote(modifier.combinedClickable(
+            onClick = {  },
+            onLongClick = { popupExpanded = true },
+        ), isInnerNote)
     } else {
         val authorState by note.author!!.live.observeAsState()
         val author = authorState?.user
@@ -195,6 +205,7 @@ fun NoteCompose(baseNote: Note, modifier: Modifier = Modifier, isInnerNote: Bool
 @Composable
 fun NoteDropDownMenu(note: Note, popupExpanded: Boolean, onDismiss: () -> Unit, accountViewModel: AccountViewModel) {
     val clipboardManager = LocalClipboardManager.current
+    val context = LocalContext.current.applicationContext
 
     DropdownMenu(
         expanded = popupExpanded,
@@ -213,5 +224,12 @@ fun NoteDropDownMenu(note: Note, popupExpanded: Boolean, onDismiss: () -> Unit,
         DropdownMenuItem(onClick = { accountViewModel.broadcast(note); onDismiss() }) {
             Text("Broadcast")
         }
+        Divider()
+        DropdownMenuItem(onClick = { accountViewModel.report(note); onDismiss() }) {
+            Text("Report Post")
+        }
+        DropdownMenuItem(onClick = { note.author?.let { accountViewModel.hide(it, context) }; onDismiss() }) {
+            Text("Hide User")
+        }
     }
 }

app/src/main/java/com/vitorpamplona/amethyst/ui/note/ReactionsRow.kt

@@ -14,6 +14,8 @@ import androidx.compose.material.IconButton
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Download
+import androidx.compose.material.icons.filled.MoreVert
 import androidx.compose.material.icons.outlined.BarChart
 import androidx.compose.material.icons.outlined.Visibility
 import androidx.compose.runtime.Composable
@@ -39,11 +41,14 @@ import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.ui.actions.NewPostView
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
 @Composable
-fun ReactionsRow(note: Note, account: Account, boost: (Note) -> Unit, reactTo: (Note) -> Unit) {
+fun ReactionsRow(note: Note, account: Account, accountViewModel: AccountViewModel) {
   val grayTint = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
 
+  var popupExpanded by remember { mutableStateOf(false) }
+
   var wantsToReplyTo by remember {
     mutableStateOf<Note?>(null)
   }
@@ -79,7 +84,7 @@ fun ReactionsRow(note: Note, account: Account, boost: (Note) -> Unit, reactTo: (
 
     IconButton(
       modifier = Modifier.then(Modifier.size(24.dp)),
-      onClick = { if (account.isWriteable()) boost(note) }
+      onClick = { if (account.isWriteable()) accountViewModel.boost(note) }
     ) {
       if (note.isBoostedBy(account.userProfile())) {
         Icon(
@@ -107,7 +112,7 @@ fun ReactionsRow(note: Note, account: Account, boost: (Note) -> Unit, reactTo: (
 
     IconButton(
       modifier = Modifier.then(Modifier.size(24.dp)),
-      onClick = { if (account.isWriteable()) reactTo(note) }
+      onClick = { if (account.isWriteable()) accountViewModel.reactTo(note) }
     ) {
       if (note.isReactedBy(account.userProfile())) {
         Icon(
@@ -161,10 +166,22 @@ fun ReactionsRow(note: Note, account: Account, boost: (Note) -> Unit, reactTo: (
     }
 
 
-
+    IconButton(
+      modifier = Modifier.then(Modifier.size(24.dp)),
+      onClick = { popupExpanded = true }
+    ) {
+      Icon(
+        imageVector = Icons.Default.MoreVert,
+        null,
+        modifier = Modifier.size(15.dp),
+        tint = grayTint,
+      )
     }
   }
 
+  NoteDropDownMenu(note, popupExpanded, { popupExpanded = false }, accountViewModel)
+}
+
 fun showCount(size: Int?): String {
   if (size == null) return " "
   return if (size == 0) return " " else "$size"

app/src/main/java/com/vitorpamplona/amethyst/ui/note/ReactionsRowState.kt

@@ -16,5 +16,5 @@ fun ReactionsRowState(baseNote: Note, accountViewModel: AccountViewModel) {
 
   if (account == null || note == null) return
 
-  ReactionsRow(note, account, accountViewModel::boost, accountViewModel::reactTo)
+  ReactionsRow(note, account, accountViewModel)
 }

app/src/main/java/com/vitorpamplona/amethyst/ui/note/UserCompose.kt

@@ -16,23 +16,29 @@ import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavController
 import coil.compose.AsyncImage
 import coil.compose.rememberAsyncImagePainter
+import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.ui.screen.FollowButton
+import com.vitorpamplona.amethyst.ui.screen.ShowUserButton
 import com.vitorpamplona.amethyst.ui.screen.UnfollowButton
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
 @Composable
 fun UserCompose(baseUser: User, accountViewModel: AccountViewModel, navController: NavController) {
     val accountState by accountViewModel.accountLiveData.observeAsState()
+    val account = accountState?.account
 
     val userState by baseUser.live.observeAsState()
     val user = userState?.user ?: return
 
+    val ctx = LocalContext.current.applicationContext
+
     Column(modifier =
         Modifier.clickable(
             onClick = { navController.navigate("User/${user.pubkeyHex}") }
@@ -69,10 +75,15 @@ fun UserCompose(baseUser: User, accountViewModel: AccountViewModel, navControlle
             }
 
             Column(modifier = Modifier.padding(start = 10.dp)) {
-                if (accountState?.account?.userProfile()?.isFollowing(user) == true) {
+                if (account?.isAcceptable(user) == false) {
-                    UnfollowButton { accountState?.account?.unfollow(user) }
+                    ShowUserButton {
+                        account.showUser(user.pubkeyHex)
+                        LocalPreferences(ctx).saveToEncryptedStorage(account)
+                    }
+                } else if (account?.userProfile()?.isFollowing(user) == true) {
+                    UnfollowButton { account.unfollow(user) }
                 } else {
-                    FollowButton { accountState?.account?.follow(user) }
+                    FollowButton { account?.follow(user) }
                 }
             }
         }

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/AccountStateViewModel.kt

@@ -3,6 +3,7 @@ package com.vitorpamplona.amethyst.ui.screen
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import androidx.security.crypto.EncryptedSharedPreferences
+import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.ServiceManager
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.DefaultChannels
@@ -30,15 +31,13 @@ import nostr.postr.Persona
 import nostr.postr.bechToBytes
 import nostr.postr.toHex
 
-class AccountStateViewModel(
+class AccountStateViewModel(private val localPreferences: LocalPreferences): ViewModel() {
-  private val encryptedPreferences: EncryptedSharedPreferences
-): ViewModel() {
   private val _accountContent = MutableStateFlow<AccountState>(AccountState.LoggedOff)
   val accountContent = _accountContent.asStateFlow()
 
   init {
     // pulls account from storage.
-    loadFromEncryptedStorage()?.let {
+    localPreferences.loadFromEncryptedStorage()?.let {
       login(it)
     }
   }
@@ -58,14 +57,14 @@ class AccountStateViewModel(
         Account(Persona(Hex.decode(key)))
       }
 
-    saveToEncryptedStorage(account)
+    localPreferences.saveToEncryptedStorage(account)
 
     login(account)
   }
 
   fun newKey() {
     val account = Account(Persona())
-    saveToEncryptedStorage(account)
+    localPreferences.saveToEncryptedStorage(account)
     login(account)
   }
 
@@ -83,36 +82,6 @@ class AccountStateViewModel(
   fun logOff() {
     _accountContent.update { AccountState.LoggedOff }
 
-    clearEncryptedStorage()
+    localPreferences.clearEncryptedStorage()
-  }
-
-  fun clearEncryptedStorage() {
-    encryptedPreferences.edit().apply {
-      remove("nostr_privkey")
-      remove("nostr_pubkey")
-      remove("following_channels")
-    }.apply()
-  }
-
-  fun saveToEncryptedStorage(account: Account) {
-    encryptedPreferences.edit().apply {
-      account.loggedIn.privKey?.let { putString("nostr_privkey", it.toHex()) }
-      account.loggedIn.pubKey.let { putString("nostr_pubkey", it.toHex()) }
-      account.followingChannels.let { putStringSet("following_channels", account.followingChannels) }
-    }.apply()
-  }
-
-  fun loadFromEncryptedStorage(): Account? {
-    encryptedPreferences.apply {
-      val privKey = getString("nostr_privkey", null)
-      val pubKey = getString("nostr_pubkey", null)
-      val followingChannels = getStringSet("following_channels", DefaultChannels)?.toMutableSet() ?: DefaultChannels.toMutableSet()
-
-      if (pubKey != null) {
-        return Account(Persona(privKey = privKey?.toByteArray(), pubKey = pubKey.toByteArray()), followingChannels)
-      } else {
-        return null
-      }
-    }
   }
 }

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/UserFeedViewModel.kt

@@ -8,6 +8,7 @@ import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.LocalCacheState
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.service.NostrDataSource
+import com.vitorpamplona.amethyst.service.NostrHiddenAccountsDataSource
 import com.vitorpamplona.amethyst.service.NostrUserProfileFollowersDataSource
 import com.vitorpamplona.amethyst.service.NostrUserProfileFollowsDataSource
 import kotlinx.coroutines.CoroutineScope
@@ -28,6 +29,10 @@ class NostrUserProfileFollowersUserFeedViewModel(): UserFeedViewModel(
     NostrUserProfileFollowersDataSource
 )
 
+class NostrHiddenAccountsFeedViewModel(): UserFeedViewModel(
+    NostrHiddenAccountsDataSource
+)
+
 open class UserFeedViewModel(val dataSource: NostrDataSource<User>): ViewModel() {
     private val _feedContent = MutableStateFlow<UserFeedState>(UserFeedState.Loading)
     val feedContent = _feedContent.asStateFlow()

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/AccountViewModel.kt

@@ -1,11 +1,14 @@
 package com.vitorpamplona.amethyst.ui.screen.loggedIn
 
+import android.content.Context
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.Transformations
 import androidx.lifecycle.ViewModel
+import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.AccountState
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.model.UserState
 
 class AccountViewModel(private val account: Account): ViewModel() {
@@ -15,6 +18,10 @@ class AccountViewModel(private val account: Account): ViewModel() {
     account.reactTo(note)
   }
 
+  fun report(note: Note) {
+    account.report(note)
+  }
+
   fun boost(note: Note) {
     account.boost(note)
   }
@@ -26,4 +33,14 @@ class AccountViewModel(private val account: Account): ViewModel() {
   fun decrypt(note: Note): String? {
     return account.decryptContent(note)
   }
+
+  fun hide(user: User, ctx: Context) {
+    account.hideUser(user.pubkeyHex)
+    LocalPreferences(ctx).saveToEncryptedStorage(account)
+  }
+
+  fun show(user: User, ctx: Context) {
+    account.showUser(user.pubkeyHex)
+    LocalPreferences(ctx).saveToEncryptedStorage(account)
+  }
 }

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/ChannelScreen.kt

@@ -30,6 +30,7 @@ import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.ClipboardManager
 import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.KeyboardCapitalization
@@ -41,6 +42,7 @@ import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
 import coil.compose.AsyncImage
 import coil.compose.rememberAsyncImagePainter
+import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.Channel
 import com.vitorpamplona.amethyst.model.Note
@@ -169,12 +171,12 @@ fun ChannelHeader(baseChannel: Channel, account: Account, accountStateViewModel:
 
                 channel?.let {
                     if (channel.creator == account.userProfile()) {
-                        EditButton(account, it, accountStateViewModel)
+                        EditButton(account, it)
                     } else {
                         if (account.followingChannels.contains(channel.idHex)) {
-                            LeaveButton(account,channel,accountStateViewModel, navController)
+                            LeaveButton(account,channel, navController)
                         } else {
-                            JoinButton(account,channel,accountStateViewModel, navController)
+                            JoinButton(account,channel, navController)
                         }
                     }
                 }
@@ -209,13 +211,13 @@ private fun NoteCopyButton(
 }
 
 @Composable
-private fun EditButton(account: Account, channel: Channel, accountStateViewModel: AccountStateViewModel) {
+private fun EditButton(account: Account, channel: Channel) {
     var wantsToPost by remember {
         mutableStateOf(false)
     }
 
     if (wantsToPost)
-        NewChannelView({ wantsToPost = false }, account = account, accountStateViewModel, channel)
+        NewChannelView({ wantsToPost = false }, account = account, channel)
 
     Button(
         modifier = Modifier.padding(horizontal = 3.dp),
@@ -231,11 +233,14 @@ private fun EditButton(account: Account, channel: Channel, accountStateViewModel
 }
 
 @Composable
-private fun JoinButton(account: Account, channel: Channel, accountStateViewModel: AccountStateViewModel, navController: NavController) {
+private fun JoinButton(account: Account, channel: Channel, navController: NavController) {
+    val context = LocalContext.current.applicationContext
+
     Button(
         modifier = Modifier.padding(horizontal = 3.dp),
         onClick = {
-            account.joinChannel(channel.idHex, accountStateViewModel)
+            account.joinChannel(channel.idHex)
+            LocalPreferences(context).saveToEncryptedStorage(account)
             navController.navigate(Route.Message.route)
         },
         shape = RoundedCornerShape(20.dp),
@@ -249,11 +254,14 @@ private fun JoinButton(account: Account, channel: Channel, accountStateViewModel
 }
 
 @Composable
-private fun LeaveButton(account: Account, channel: Channel, accountStateViewModel: AccountStateViewModel, navController: NavController) {
+private fun LeaveButton(account: Account, channel: Channel, navController: NavController) {
+    val context = LocalContext.current.applicationContext
+
     Button(
         modifier = Modifier.padding(horizontal = 3.dp),
         onClick = {
-            account.leaveChannel(channel.idHex, accountStateViewModel)
+            account.leaveChannel(channel.idHex)
+            LocalPreferences(context).saveToEncryptedStorage(account)
             navController.navigate(Route.Message.route)
         },
         shape = RoundedCornerShape(20.dp),

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/FiltersScreen.kt

@@ -0,0 +1,70 @@
+package com.vitorpamplona.amethyst.ui.screen
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Tab
+import androidx.compose.material.TabRow
+import androidx.compose.material.TabRowDefaults
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.livedata.observeAsState
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavController
+import com.google.accompanist.pager.ExperimentalPagerApi
+import com.google.accompanist.pager.HorizontalPager
+import com.google.accompanist.pager.pagerTabIndicatorOffset
+import com.google.accompanist.pager.rememberPagerState
+import com.vitorpamplona.amethyst.service.NostrHiddenAccountsDataSource
+import com.vitorpamplona.amethyst.service.NostrThreadDataSource
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import kotlinx.coroutines.launch
+
+@OptIn(ExperimentalPagerApi::class)
+@Composable
+fun FiltersScreen(accountViewModel: AccountViewModel, navController: NavController) {
+    val accountState by accountViewModel.accountLiveData.observeAsState()
+    val account = accountState?.account
+
+    if (account != null) {
+        NostrHiddenAccountsDataSource.account = account
+
+        val feedViewModel: NostrHiddenAccountsFeedViewModel = viewModel()
+
+        Column(Modifier.fillMaxHeight()) {
+            Column(modifier = Modifier.padding(start = 10.dp, end = 10.dp)) {
+                val pagerState = rememberPagerState()
+                val coroutineScope = rememberCoroutineScope()
+
+                TabRow(
+                    selectedTabIndex = pagerState.currentPage,
+                    indicator = { tabPositions ->
+                        TabRowDefaults.Indicator(
+                            Modifier.pagerTabIndicatorOffset(pagerState, tabPositions),
+                            color = MaterialTheme.colors.primary
+                        )
+                    },
+                ) {
+                    Tab(
+                        selected = pagerState.currentPage == 0,
+                        onClick = { coroutineScope.launch { pagerState.animateScrollToPage(0) } },
+                        text = {
+                            Text(text = "Blocked Users")
+                        }
+                    )
+                }
+                HorizontalPager(count = 1, state = pagerState) {
+                    when (pagerState.currentPage) {
+                        0 -> UserFeedView(feedViewModel, accountViewModel, navController)
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/MainScreen.kt

@@ -85,7 +85,7 @@ fun FloatingButton(navController: NavHostController, accountViewModel: AccountSt
                     // Does nothing.
                 }
                 is AccountState.LoggedIn -> {
-                    NewChannelButton(state.account, accountViewModel)
+                    NewChannelButton(state.account)
                 }
             }
         }

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/ProfileScreen.kt

@@ -41,6 +41,7 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.ClipboardManager
 import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.font.FontWeight
@@ -54,6 +55,7 @@ import com.google.accompanist.pager.ExperimentalPagerApi
 import com.google.accompanist.pager.HorizontalPager
 import com.google.accompanist.pager.pagerTabIndicatorOffset
 import com.google.accompanist.pager.rememberPagerState
+import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.Note
@@ -67,6 +69,7 @@ import com.vitorpamplona.amethyst.ui.actions.NewUserMetadataView
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import kotlinx.coroutines.launch
 import nostr.postr.toNpub
+import nostr.postr.toNsec
 
 @OptIn(ExperimentalPagerApi::class)
 @Composable
@@ -77,6 +80,8 @@ fun ProfileScreen(userId: String?, accountViewModel: AccountViewModel, navContro
     val accountUserState by account.userProfile().live.observeAsState()
     val accountUser = accountUserState?.user
 
+    val ctx = LocalContext.current.applicationContext
+
     if (userId != null && accountUser != null) {
         DisposableEffect(account) {
             NostrUserProfileDataSource.loadUserProfile(userId)
@@ -145,12 +150,21 @@ fun ProfileScreen(userId: String?, accountViewModel: AccountViewModel, navContro
 
                             MessageButton(user, navController)
 
+                            if (accountUser == user && account.isWriteable()) {
+                                NSecCopyButton(account)
+                            }
+
                             NPubCopyButton(user)
 
                             if (accountUser == user) {
                                 EditButton(account)
                             } else {
-                                if (accountUser.isFollowing(user)) {
+                                if (account?.isAcceptable(user) == false) {
+                                    ShowUserButton {
+                                        account.showUser(user.pubkeyHex)
+                                        LocalPreferences(ctx).saveToEncryptedStorage(account)
+                                    }
+                                } else if (accountUser.isFollowing(user)) {
                                     UnfollowButton { account.unfollow(user) }
                                 } else {
                                     FollowButton { account.follow(user) }
@@ -267,6 +281,25 @@ fun TabFollowers(user: User, accountViewModel: AccountViewModel, navController:
     }
 }
 
+@Composable
+private fun NSecCopyButton(
+    account: Account
+) {
+    val clipboardManager = LocalClipboardManager.current
+
+    Button(
+        modifier = Modifier.padding(horizontal = 3.dp),
+        onClick = { account.loggedIn.privKey?.let { clipboardManager.setText(AnnotatedString(it.toNsec())) } },
+        shape = RoundedCornerShape(20.dp),
+        colors = ButtonDefaults
+            .buttonColors(
+                backgroundColor = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
+            ),
+    ) {
+        Text(text = "nsec", color = Color.White)
+    }
+}
+
 @Composable
 private fun NPubCopyButton(
     user: User
@@ -358,4 +391,18 @@ fun FollowButton(onClick: () -> Unit) {
     }
 }
 
+@Composable
+fun ShowUserButton(onClick: () -> Unit) {
+    Button(
+        modifier = Modifier.padding(start = 3.dp),
+        onClick = onClick,
+        shape = RoundedCornerShape(20.dp),
+        colors = ButtonDefaults
+            .buttonColors(
+                backgroundColor = MaterialTheme.colors.primary
+            )
+    ) {
+        Text(text = "Unblock", color = Color.White)
+    }
+}
 

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/SearchScreen.kt

@@ -40,6 +40,7 @@ import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.text.input.TextFieldValue
+import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
@@ -54,6 +55,7 @@ import com.vitorpamplona.amethyst.service.NostrSearchEventOrUserDataSource
 import com.vitorpamplona.amethyst.service.NostrThreadDataSource
 import com.vitorpamplona.amethyst.ui.note.ChannelName
 import com.vitorpamplona.amethyst.ui.note.NoteCompose
+import com.vitorpamplona.amethyst.ui.note.UserCompose
 import com.vitorpamplona.amethyst.ui.note.UsernameDisplay
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
@@ -167,9 +169,7 @@ private fun SearchBar(accountViewModel: AccountViewModel, navController: NavCont
             )
         ) {
             itemsIndexed(searchResults.value, key = { _, item -> "u"+item.pubkeyHex }) { index, item ->
-                UserLine(item) {
+                UserCompose(item, accountViewModel = accountViewModel, navController = navController)
-                    navController.navigate("User/${item.pubkeyHex}")
-                }
             }
 
             itemsIndexed(searchResultsChannels.value, key = { _, item -> "c"+item.idHex }) { index, item ->
@@ -236,7 +236,9 @@ fun UserLine(
 
                 Text(
                     user.info.about?.take(100) ?: "",
-                    color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
+                    color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis
                 )
             }
         }