Refactors the code to avoid using callback lambdas

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/EditPostView.kt

@@ -110,7 +110,7 @@ fun EditPostView(
     nav: INav,
 ) {
     val postViewModel: EditPostViewModel = viewModel()
-    postViewModel.prepare(edit, versionLookingAt, accountViewModel)
+    postViewModel.init(accountViewModel)
 
     val context = LocalContext.current
 
@@ -118,7 +118,7 @@ fun EditPostView(
     val scope = rememberCoroutineScope()
 
     LaunchedEffect(Unit) {
-        postViewModel.load(edit, versionLookingAt, accountViewModel)
+        postViewModel.load(edit, versionLookingAt)
     }
 
     Dialog(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/EditPostViewModel.kt

@@ -61,13 +61,12 @@ import com.vitorpamplona.quartz.nip94FileMetadata.originalHash
 import com.vitorpamplona.quartz.nip94FileMetadata.sensitiveContent
 import com.vitorpamplona.quartz.nip94FileMetadata.size
 import kotlinx.collections.immutable.ImmutableList
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 
 @Stable
 open class EditPostViewModel : ViewModel() {
-    var accountViewModel: AccountViewModel? = null
+    lateinit var accountViewModel: AccountViewModel
-    var account: Account? = null
+    lateinit var account: Account
 
     var editedFromNote: Note? = null
 
@@ -94,46 +93,32 @@ open class EditPostViewModel : ViewModel() {
     var canAddInvoice by mutableStateOf(false)
     var wantsInvoice by mutableStateOf(false)
 
-    open fun prepare(
+    open fun init(accountViewModel: AccountViewModel) {
-        edit: Note,
-        versionLookingAt: Note?,
-        accountViewModel: AccountViewModel,
-    ) {
         this.accountViewModel = accountViewModel
         this.account = accountViewModel.account
-        this.editedFromNote = edit
-
-        this.userSuggestions?.reset()
-        this.userSuggestions = UserSuggestionState(accountViewModel.account)
     }
 
     open fun load(
         edit: Note,
         versionLookingAt: Note?,
-        accountViewModel: AccountViewModel,
     ) {
-        this.accountViewModel = accountViewModel
-        this.account = accountViewModel.account
-
         canAddInvoice = accountViewModel.userProfile().info?.lnAddress() != null
         multiOrchestrator = null
 
         message = TextFieldValue(versionLookingAt?.event?.content ?: edit.event?.content ?: "")
         urlPreview = findUrlInMessage()
 
-        editedFromNote = edit
+        this.editedFromNote = edit
+
+        this.userSuggestions?.reset()
+        this.userSuggestions = UserSuggestionState(accountViewModel.account)
     }
 
     fun sendPost() {
-        viewModelScope.launch(Dispatchers.IO) { innerSendPost() }
+        accountViewModel.launchSigner(::innerSendPost)
     }
 
     suspend fun innerSendPost() {
-        if (accountViewModel == null) {
-            cancel()
-            return
-        }
-
         val extraNotesToBroadcast = mutableListOf<Event>()
 
         nip95attachments.forEach {
@@ -142,14 +127,14 @@ open class EditPostViewModel : ViewModel() {
         }
 
         val notify =
-            if (editedFromNote?.author?.pubkeyHex == account?.userProfile()?.pubkeyHex) {
+            if (editedFromNote?.author?.pubkeyHex == account.userProfile().pubkeyHex) {
                 null
             } else {
                 // notifies if it is not the logged in user
                 editedFromNote?.author?.pubkeyHex
             }
 
-        account?.sendEdit(
+        account.sendEdit(
             message = message.text,
             originalNote = editedFromNote!!,
             notify = notify,
@@ -191,7 +176,7 @@ open class EditPostViewModel : ViewModel() {
         context: Context,
     ) {
         viewModelScope.launch {
-            val myAccount = account ?: return@launch
+            val myAccount = account
             val myMultiOrchestrator = multiOrchestrator ?: return@launch
 
             isUploadingImage = true
@@ -218,7 +203,7 @@ open class EditPostViewModel : ViewModel() {
                                 contentWarningReason = if (sensitiveContent) "" else null,
                             )
                         nip95attachments = nip95attachments + nip95
-                        val note = nip95.let { it1 -> account?.consumeNip95(it1.first, it1.second) }
+                        val note = nip95.let { it1 -> account.consumeNip95(it1.first, it1.second) }
 
                         note?.let {
                             message = message.insertUrlAtCursor("nostr:" + it.toNEvent())

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/ClickableRoute.kt

@@ -112,7 +112,7 @@ fun LoadOrCreateNote(
 
     if (note == null) {
         LaunchedEffect(key1 = event.id) {
-            accountViewModel.checkGetOrCreateNote(event) { note = it }
+            note = accountViewModel.noteFromEvent(event)
         }
     }
 
@@ -254,7 +254,7 @@ fun DisplayUser(
 
     if (userBase == null) {
         LaunchedEffect(key1 = userHex) {
-            accountViewModel.checkGetOrCreateUser(userHex) { userBase = it }
+            userBase = accountViewModel.checkGetOrCreateUser(userHex)
         }
     }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/RichTextViewer.kt

@@ -746,7 +746,7 @@ fun LoadNote(
 
     if (note == null) {
         LaunchedEffect(key1 = baseNoteHex) {
-            accountViewModel.checkGetOrCreateNote(baseNoteHex) { note = it }
+            note = accountViewModel.checkGetOrCreateNote(baseNoteHex)
         }
     }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/Highlight.kt

@@ -243,9 +243,7 @@ private fun DisplayQuoteAuthor(
 
     if (userBase == null && authorHex != null) {
         LaunchedEffect(authorHex) {
-            accountViewModel.checkGetOrCreateUser(authorHex) { newUserBase ->
+            userBase = accountViewModel.checkGetOrCreateUser(authorHex)
-                userBase = newUserBase
-            }
         }
     }
 

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

@@ -977,31 +977,13 @@ class AccountViewModel(
 
     override suspend fun getOrCreateUser(hex: HexKey): User = LocalCache.getOrCreateUser(hex)
 
-    fun checkGetOrCreateUser(
-        key: HexKey,
-        onResult: (User?) -> Unit,
-    ) {
-        viewModelScope.launch(Dispatchers.IO) { onResult(checkGetOrCreateUser(key)) }
-    }
-
     fun getUserIfExists(hex: HexKey): User? = LocalCache.getUserIfExists(hex)
 
     fun checkGetOrCreateNote(key: HexKey): Note? = LocalCache.checkGetOrCreateNote(key)
 
     override suspend fun getOrCreateNote(hex: HexKey): Note = LocalCache.getOrCreateNote(hex)
 
-    fun checkGetOrCreateNote(
+    fun noteFromEvent(event: Event): Note? {
-        key: HexKey,
-        onResult: (Note?) -> Unit,
-    ) {
-        viewModelScope.launch(Dispatchers.IO) { onResult(checkGetOrCreateNote(key)) }
-    }
-
-    fun checkGetOrCreateNote(
-        event: Event,
-        onResult: (Note?) -> Unit,
-    ) {
-        viewModelScope.launch(Dispatchers.IO) {
         var note = checkGetOrCreateNote(event.id)
 
         if (note == null) {
@@ -1009,21 +991,13 @@ class AccountViewModel(
             note = checkGetOrCreateNote(event.id)
         }
 
-            onResult(note)
+        return note
-        }
     }
 
     fun getNoteIfExists(hex: HexKey): Note? = LocalCache.getNoteIfExists(hex)
 
     override suspend fun getOrCreateAddressableNote(address: Address): AddressableNote = LocalCache.getOrCreateAddressableNote(address)
 
-    fun getOrCreateAddressableNote(
-        key: Address,
-        onResult: (AddressableNote?) -> Unit,
-    ) {
-        viewModelScope.launch(Dispatchers.IO) { onResult(getOrCreateAddressableNote(key)) }
-    }
-
     fun getAddressableNoteIfExists(key: String): AddressableNote? = LocalCache.getAddressableNoteIfExists(key)
 
     fun getAddressableNoteIfExists(key: Address): AddressableNote? = LocalCache.getAddressableNoteIfExists(key)
@@ -1178,8 +1152,7 @@ class AccountViewModel(
         context: Context,
     ) {
         if (isWriteable()) {
-            val hint = note.toEventHint<VoiceEvent>()
+            val hint = note.toEventHint<VoiceEvent>() ?: return
-            if (hint == null) return
 
             launchSigner {
                 val uploader = UploadOrchestrator()

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/privateDM/ChatroomView.kt

@@ -72,19 +72,17 @@ fun ChatroomView(
 
     if (replyToNote != null) {
         LaunchedEffect(key1 = replyToNote, newPostModel, accountViewModel) {
-            accountViewModel.checkGetOrCreateNote(replyToNote) {
+            val replyNote = accountViewModel.checkGetOrCreateNote(replyToNote)
-                if (it != null) {
+            if (replyNote != null) {
-                    newPostModel.reply(it)
+                newPostModel.reply(replyNote)
-                }
             }
         }
     }
     if (editFromDraft != null) {
         LaunchedEffect(editFromDraft, newPostModel, accountViewModel) {
-            accountViewModel.checkGetOrCreateNote(editFromDraft) {
+            val draftNote = accountViewModel.checkGetOrCreateNote(editFromDraft)
-                if (it != null) {
+            if (draftNote != null) {
-                    newPostModel.editFromDraft(it)
+                newPostModel.editFromDraft(draftNote)
-                }
             }
         }
     }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/privateDM/send/ChatNewMessageViewModel.kt

@@ -325,9 +325,7 @@ class ChatNewMessageViewModel :
                 }
 
             if (replyId != null) {
-                accountViewModel.checkGetOrCreateNote(replyId) {
+                replyTo.value = accountViewModel.checkGetOrCreateNote(replyId)
-                    replyTo.value = it
-                }
             }
         } else if (draftEvent is PrivateDmEvent) {
             val recipientNPub = draftEvent.verifiedRecipientPubKey()?.let { Hex.decode(it).toNpub() }
@@ -335,9 +333,7 @@ class ChatNewMessageViewModel :
 
             val replyId = draftEvent.replyTo()
             if (replyId != null) {
-                accountViewModel.checkGetOrCreateNote(replyId) {
+                replyTo.value = accountViewModel.checkGetOrCreateNote(replyId)
-                    replyTo.value = it
-                }
             }
         }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/nip28PublicChat/metadata/ChannelMetadataScreen.kt

@@ -36,6 +36,7 @@ import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
@@ -91,7 +92,17 @@ fun ChannelMetadataScreen(
     nav: INav,
 ) {
     val postViewModel: ChannelMetadataViewModel = viewModel()
-    postViewModel.load(accountViewModel.account, channel)
+    postViewModel.init(accountViewModel)
+
+    if (channel != null) {
+        LaunchedEffect(postViewModel) {
+            postViewModel.load(channel)
+        }
+    } else {
+        LaunchedEffect(postViewModel) {
+            postViewModel.new()
+        }
+    }
 
     ChannelMetadataScaffold(
         postViewModel = postViewModel,
@@ -105,7 +116,7 @@ fun ChannelMetadataScreen(
 private fun DialogContentPreview() {
     val accountViewModel = mockAccountViewModel()
     val postViewModel: ChannelMetadataViewModel = viewModel()
-    postViewModel.load(accountViewModel.account, null)
+    postViewModel.init(accountViewModel)
 
     ThemeComparisonColumn {
         ChannelMetadataScaffold(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/nip28PublicChat/metadata/ChannelMetadataViewModel.kt

@@ -40,6 +40,7 @@ import com.vitorpamplona.amethyst.service.uploads.blossom.BlossomUploader
 import com.vitorpamplona.amethyst.service.uploads.nip96.Nip96Uploader
 import com.vitorpamplona.amethyst.ui.actions.mediaServers.ServerType
 import com.vitorpamplona.amethyst.ui.actions.uploads.SelectedMedia
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.common.BasicRelaySetupInfo
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.common.relaySetupInfoBuilder
 import com.vitorpamplona.amethyst.ui.stringRes
@@ -57,7 +58,9 @@ import kotlin.coroutines.cancellation.CancellationException
 
 @Stable
 class ChannelMetadataViewModel : ViewModel() {
-    private var account: Account? = null
+    private lateinit var accountViewModel: AccountViewModel
+    private lateinit var account: Account
+
     private var originalChannel: PublicChatChannel? = null
 
     val channelName = mutableStateOf(TextFieldValue())
@@ -73,12 +76,17 @@ class ChannelMetadataViewModel : ViewModel() {
         channelName.value.text.isNotBlank()
     }
 
-    fun load(
+    fun init(accountViewModel: AccountViewModel) {
-        account: Account,
+        this.accountViewModel = accountViewModel
-        channel: PublicChatChannel?,
+        this.account = accountViewModel.account
-    ) {
+    }
-        this.account = account
+
-        if (channel != null) {
+    fun new() {
+        originalChannel = null
+        clear()
+    }
+
+    fun load(channel: PublicChatChannel) {
         originalChannel = channel
         channelName.value = TextFieldValue(channel.info.name ?: "")
         channelPicture.value = TextFieldValue(channel.info.picture ?: "")
@@ -91,7 +99,6 @@ class ChannelMetadataViewModel : ViewModel() {
 
         _channelRelays.update { relays ?: emptyList() }
     }
-    }
 
     fun isNewChannel() = originalChannel == null && _channelRelays.value.isNotEmpty()
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/send/ChannelNewMessageViewModel.kt

@@ -242,16 +242,12 @@ open class ChannelNewMessageViewModel :
         if (draftEvent as? ChannelMessageEvent != null) {
             val replyId = draftEvent.reply()?.eventId
             if (replyId != null) {
-                accountViewModel.checkGetOrCreateNote(replyId) {
+                replyTo.value = accountViewModel.checkGetOrCreateNote(replyId)
-                    replyTo.value = it
-                }
             }
         } else if (draftEvent as? LiveActivitiesChatMessageEvent != null) {
             val replyId = draftEvent.reply()?.eventId
             if (replyId != null) {
-                accountViewModel.checkGetOrCreateNote(replyId) {
+                replyTo.value = accountViewModel.checkGetOrCreateNote(replyId)
-                    replyTo.value = it
-                }
             }
         }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/rooms/ChatroomHeaderCompose.kt

@@ -327,11 +327,7 @@ fun LoadUser(
 
     if (user == null) {
         LaunchedEffect(key1 = baseUserHex) {
-            accountViewModel.checkGetOrCreateUser(baseUserHex) { newUser ->
+            user = accountViewModel.checkGetOrCreateUser(baseUserHex)
-                if (user != newUser) {
-                    user = newUser
-                }
-            }
         }
     }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/discover/nip99Classifieds/NewProductScreen.kt

@@ -45,7 +45,6 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.unit.dp
-import androidx.lifecycle.viewModelScope
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Note
@@ -81,11 +80,9 @@ import com.vitorpamplona.amethyst.ui.stringRes
 import com.vitorpamplona.amethyst.ui.theme.Size10dp
 import com.vitorpamplona.amethyst.ui.theme.Size35dp
 import com.vitorpamplona.amethyst.ui.theme.Size5dp
-import com.vitorpamplona.quartz.nip01Core.signers.SignerExceptions
 import kotlinx.collections.immutable.persistentListOf
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.FlowPreview
-import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
 @OptIn(ExperimentalMaterial3Api::class, FlowPreview::class)
@@ -161,17 +158,10 @@ fun NewProductScreen(
                     nav.popBack()
                 },
                 onPost = {
-                    try {
+                    accountViewModel.launchSigner {
-                        accountViewModel.viewModelScope.launch(Dispatchers.IO) {
                         postViewModel.sendPostSync()
                         nav.popBack()
                     }
-                    } catch (e: SignerExceptions.ReadOnlyException) {
-                        accountViewModel.toastManager.toast(
-                            R.string.read_only_user,
-                            R.string.login_with_a_private_key_to_be_able_to_sign_events,
-                        )
-                    }
                 },
             )
         },

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/discover/nip99Classifieds/NewProductViewModel.kt

@@ -104,15 +104,15 @@ open class NewProductViewModel :
     IZapRaiser {
     val draftTag = DraftTagState()
 
-    var accountViewModel: AccountViewModel? = null
+    lateinit var accountViewModel: AccountViewModel
-    var account: Account? = null
+    lateinit var account: Account
 
     init {
         viewModelScope.launch(Dispatchers.IO) {
             draftTag.versions.collectLatest {
                 // don't save the first
                 if (it > 0) {
-                    accountViewModel?.launchSigner {
+                    accountViewModel.launchSigner {
                         sendDraftSync()
                     }
                 }
@@ -189,8 +189,6 @@ open class NewProductViewModel :
     }
 
     fun editFromDraft(draft: Note) {
-        val accountViewModel = accountViewModel ?: return
-
         val noteEvent = draft.event
         val noteAuthor = draft.author
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/home/ShortNotePostViewModel.kt

@@ -483,7 +483,7 @@ open class ShortNotePostViewModel :
         cancel()
 
         accountViewModel.account.signAndComputeBroadcast(template, extraNotesToBroadcast)
-        accountViewModel.viewModelScope.launch(Dispatchers.IO) {
+        accountViewModel.launchSigner {
             accountViewModel.account.deleteDraftIgnoreErrors(version)
         }
     }