composeApp/src/androidMain/kotlin/su/reya/coop/screens/ContactListScreen.kt

@@ -1,34 +1,78 @@
 package su.reya.coop.screens
 
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
+import androidx.compose.material3.ExtendedFloatingActionButton
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
+import androidx.compose.material3.ListItemDefaults
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.PlainTooltip
 import androidx.compose.material3.Scaffold
+import androidx.compose.material3.SegmentedListItem
 import androidx.compose.material3.SnackbarHost
 import androidx.compose.material3.Text
+import androidx.compose.material3.TooltipAnchorPosition
+import androidx.compose.material3.TooltipBox
+import androidx.compose.material3.TooltipDefaults
 import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.material3.rememberTooltipState
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.Dialog
+import androidx.compose.ui.window.DialogProperties
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import coop.composeapp.generated.resources.Res
 import coop.composeapp.generated.resources.ic_arrow_back
+import coop.composeapp.generated.resources.ic_check
+import coop.composeapp.generated.resources.ic_close
+import coop.composeapp.generated.resources.ic_plus
+import coop.composeapp.generated.resources.ic_scanner
+import kotlinx.coroutines.launch
 import org.jetbrains.compose.resources.painterResource
+import rust.nostr.sdk.Nip05Address
+import rust.nostr.sdk.PublicKey
 import su.reya.coop.LocalNavigator
 import su.reya.coop.LocalNostrViewModel
 import su.reya.coop.LocalSnackbarHostState
+import su.reya.coop.Screen
+import su.reya.coop.shared.Avatar
+import su.reya.coop.short
 
+@OptIn(ExperimentalMaterial3ExpressiveApi::class)
 @Composable
 fun ContactListScreen() {
     val navigator = LocalNavigator.current
     val snackbarHostState = LocalSnackbarHostState.current
     val viewModel = LocalNostrViewModel.current
-    val currentUser = viewModel.currentUser() ?: return
+
+    val contactList by viewModel.contactList.collectAsStateWithLifecycle()
+    var openAddContactDialog by remember { mutableStateOf(false) }
 
     Scaffold(
+        containerColor = MaterialTheme.colorScheme.surfaceContainer,
         snackbarHost = { SnackbarHost(snackbarHostState) },
         topBar = {
             TopAppBar(
@@ -38,6 +82,9 @@ fun ContactListScreen() {
                         style = MaterialTheme.typography.titleMediumEmphasized
                     )
                 },
+                colors = TopAppBarDefaults.topAppBarColors(
+                    containerColor = MaterialTheme.colorScheme.surfaceContainer,
+                ),
                 navigationIcon = {
                     IconButton(onClick = { navigator.goBack() }) {
                         Icon(
@@ -45,19 +92,236 @@ fun ContactListScreen() {
                             contentDescription = "Back"
                         )
                     }
+                },
+                actions = {
+                    IconButton(onClick = { navigator.navigate(Screen.Scan) }) {
+                        Icon(
+                            painter = painterResource(Res.drawable.ic_scanner),
+                            contentDescription = "Scanner"
+                        )
                     }
+                }
+            )
+        },
+        floatingActionButton = {
+            TooltipBox(
+                positionProvider = TooltipDefaults.rememberTooltipPositionProvider(
+                    TooltipAnchorPosition.Above,
+                    spacingBetweenTooltipAndAnchor = 8.dp,
+                ),
+                tooltip = {
+                    PlainTooltip { Text("New Contact") }
+                },
+                state = rememberTooltipState(),
+            ) {
+                ExtendedFloatingActionButton(
+                    onClick = { openAddContactDialog = true },
+                    expanded = false,
+                    icon = {
+                        Icon(
+                            painter = painterResource(Res.drawable.ic_plus),
+                            contentDescription = "New Contact"
+                        )
+                    },
+                    text = { Text("New Contact") },
+                )
+            }
+        },
+        content = { innerPadding ->
+            Column(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(16.dp)
+                    .padding(innerPadding),
+                verticalArrangement = Arrangement.spacedBy(ListItemDefaults.SegmentedGap),
+            ) {
+                if (contactList.isNotEmpty()) {
+                    contactList.forEachIndexed { index, pubkey ->
+                        ContactListItem(
+                            pubkey = pubkey,
+                            index = index,
+                            total = contactList.size,
+                            onClick = {})
+                    }
+                } else {
+                    Box(
+                        modifier = Modifier.fillMaxSize(),
+                        contentAlignment = Alignment.Center
+                    ) {
+                        Column(
+                            horizontalAlignment = Alignment.CenterHorizontally,
+                            verticalArrangement = Arrangement.spacedBy(4.dp),
+                        ) {
+                            Text(
+                                text = "No contacts yet",
+                                style = MaterialTheme.typography.titleLargeEmphasized.copy(
+                                    fontWeight = FontWeight.SemiBold
+                                ),
+                                color = MaterialTheme.colorScheme.onSurface
+                            )
+                            Text(
+                                text = "Your contacts will appear here",
+                                style = MaterialTheme.typography.bodyMedium,
+                                color = MaterialTheme.colorScheme.outline
+                            )
+                        }
+                    }
+                }
+            }
+        }
+    )
+
+    if (openAddContactDialog) {
+        AddContactDialog(onDismissRequest = { openAddContactDialog = false })
+    }
+}
+
+@OptIn(ExperimentalMaterial3ExpressiveApi::class)
+@Composable
+fun AddContactDialog(onDismissRequest: () -> Unit) {
+    val snackbarHostState = LocalSnackbarHostState.current
+    val viewModel = LocalNostrViewModel.current
+    val focusRequester = remember { FocusRequester() }
+    var contact by remember { mutableStateOf("") }
+    var isError by remember { mutableStateOf(false) }
+
+    val scope = rememberCoroutineScope()
+
+    LaunchedEffect(Unit) {
+        focusRequester.requestFocus()
+    }
+
+    Dialog(
+        onDismissRequest = { onDismissRequest() },
+        properties = DialogProperties(
+            usePlatformDefaultWidth = false,
+            dismissOnBackPress = true,
+            decorFitsSystemWindows = false,
+        ),
+    ) {
+        Scaffold(
+            modifier = Modifier.fillMaxSize(),
+            snackbarHost = { SnackbarHost(snackbarHostState) },
+            containerColor = MaterialTheme.colorScheme.surface,
+            topBar = {
+                TopAppBar(
+                    colors = TopAppBarDefaults.topAppBarColors(
+                        containerColor = MaterialTheme.colorScheme.surfaceVariant,
+                    ),
+                    title = {
+                        Text(
+                            text = "New Contact",
+                            style = MaterialTheme.typography.titleMediumEmphasized
+                        )
+                    },
+                    navigationIcon = {
+                        IconButton(onClick = { onDismissRequest() }) {
+                            Icon(
+                                painter = painterResource(Res.drawable.ic_close),
+                                contentDescription = "Close"
+                            )
+                        }
+                    },
+                    actions = {
+                        IconButton(onClick = {
+                            scope.launch {
+                                val success = viewModel.addContact(contact)
+                                if (success) onDismissRequest()
+                            }
+                        }) {
+                            Icon(
+                                painter = painterResource(Res.drawable.ic_check),
+                                contentDescription = "Add"
+                            )
+                        }
+                    },
                 )
             },
             content = { innerPadding ->
                 Column(
                     modifier = Modifier
-                    .fillMaxSize()
+                        .fillMaxWidth()
-                    .padding(innerPadding),
+                        .padding(innerPadding)
-                verticalArrangement = Arrangement.Center,
+                        .padding(16.dp),
-                horizontalAlignment = Alignment.CenterHorizontally,
+                    verticalArrangement = Arrangement.spacedBy(16.dp),
                 ) {
-                Text("Contact List Screen")
+                    OutlinedTextField(
+                        value = contact,
+                        onValueChange = { contact = it },
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .focusRequester(focusRequester),
+                        isError = isError,
+                        keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
+                        keyboardActions = KeyboardActions(
+                            onDone = {
+                                isError = contact.isNotEmpty() && !verifyContact(contact)
+                            }
+                        ),
+                        singleLine = true,
+                        label = { Text(text = "Contact Address") },
+                        placeholder = { Text(text = "npub1... or user@example.com") },
+                        supportingText = {
+                            if (isError) {
+                                Text(text = "Contact address is invalid")
+                            } else {
+                                Text(text = "Only add contact you trust.")
+                            }
+                        },
+                    )
                 }
             }
         )
     }
+}
+
+@OptIn(ExperimentalMaterial3ExpressiveApi::class)
+@Composable
+fun ContactListItem(
+    pubkey: PublicKey,
+    index: Int,
+    total: Int = 0,
+    onClick: () -> Unit,
+) {
+    val viewModel = LocalNostrViewModel.current
+    val metadataFlow = remember(pubkey) { viewModel.getMetadata(pubkey) }
+    val metadata by metadataFlow.collectAsState(initial = null)
+
+    val profile = metadata?.asRecord()
+    val displayName = profile?.name ?: profile?.displayName ?: pubkey.short()
+    val picture = profile?.picture
+
+    SegmentedListItem(
+        onClick = onClick,
+        onLongClick = { viewModel.removeContact(pubkey) },
+        shapes = ListItemDefaults.segmentedShapes(
+            index = index,
+            count = total
+        ),
+        leadingContent = {
+            Avatar(
+                picture = picture,
+                description = displayName,
+                size = 36.dp
+            )
+        },
+        supportingContent = { Text(text = pubkey.short()) },
+        content = {
+            Text(
+                text = displayName,
+                style = MaterialTheme.typography.titleMediumEmphasized,
+            )
+        }
+    )
+}
+
+fun verifyContact(address: String): Boolean {
+    return try {
+        if (address.contains("@")) Nip05Address.parse(address)
+        else PublicKey.parse(address)
+        true
+    } catch (e: Exception) {
+        println("Failed to parse contact: ${e.message}")
+        false
+    }
+}

composeApp/src/androidMain/kotlin/su/reya/coop/screens/NewChatScreen.kt

@@ -61,6 +61,7 @@ import su.reya.coop.LocalSnackbarHostState
 import su.reya.coop.Screen
 import su.reya.coop.shared.Avatar
 import su.reya.coop.short
+import kotlin.time.Duration.Companion.milliseconds
 
 @OptIn(ExperimentalMaterial3ExpressiveApi::class)
 @Composable
@@ -78,7 +79,7 @@ fun NewChatScreen() {
 
     LaunchedEffect(query) {
         if (query.length >= 3) {
-            delay(500) // 500ms debounce
+            delay(500.milliseconds)
 
             if (query.startsWith("npub1")) {
                 val pubkey = try {

shared/src/commonMain/kotlin/su/reya/coop/Nostr.kt

@@ -677,6 +677,21 @@ class Nostr {
         }
     }
 
+    suspend fun setContactList(contacts: List<PublicKey>) {
+        try {
+            val contacts = contacts.map { Contact(it) }
+            val event = EventBuilder.contactList(contacts).finalizeAsync(signer)
+
+            client?.sendEvent(
+                event = event,
+                target = SendEventTarget.broadcast(),
+                ackPolicy = AckPolicy.none(),
+            )
+        } catch (e: Exception) {
+            throw IllegalStateException("Failed to set contact list: ${e.message}", e)
+        }
+    }
+
     suspend fun getChatRooms(): Set<Room>? {
         try {
             val userPubkey =

shared/src/commonMain/kotlin/su/reya/coop/NostrViewModel.kt

@@ -616,6 +616,54 @@ class NostrViewModel(
         }
     }
 
+    private suspend fun newContact(publicKey: PublicKey) {
+        if (publicKey in contactList.value) return
+
+        try {
+            val updated = contactList.value + publicKey
+            // Publish new event
+            nostr.setContactList(updated.toList())
+            // Optimistic local update
+            _contactList.update { it + publicKey }
+        } catch (e: Exception) {
+            showError("Error: ${e.message}")
+        }
+    }
+
+    suspend fun addContact(address: String): Boolean {
+        val pubkey = try {
+            if (address.contains("@")) {
+                nostr.searchByAddress(address)
+            } else {
+                PublicKey.parse(address)
+            }
+        } catch (e: Exception) {
+            showError("Invalid contact address: ${e.message}")
+            return false
+        }
+
+        return run {
+            newContact(pubkey)
+            true
+        }
+    }
+
+    fun removeContact(publicKey: PublicKey) {
+        viewModelScope.launch {
+            if (publicKey !in contactList.value) return@launch
+
+            try {
+                val updated = contactList.value - publicKey
+                // Publish new event
+                nostr.setContactList(updated.toList())
+                // Optimistic local update
+                _contactList.update { it - publicKey }
+            } catch (e: Exception) {
+                showError("Error: ${e.message}")
+            }
+        }
+    }
+
     fun createChatRoom(to: List<PublicKey>): Long {
         try {
             if (nostr.signer.currentUser == null) throw IllegalStateException("User not signed in")