Add public chat screen

Signed-off-by: denis0001-dev <denis0001.dev@ya.ru>

app/src/main/java/ru/fromchat/ui/App.kt

@@ -4,13 +4,19 @@ import androidx.compose.animation.AnimatedContentTransitionScope.SlideDirection.
 import androidx.compose.animation.AnimatedContentTransitionScope.SlideDirection.Companion.Start
 import androidx.compose.animation.core.tween
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.runtime.compositionLocalOf
 import androidx.compose.ui.unit.IntOffset
+import androidx.navigation.NavController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
 import ru.fromchat.ui.auth.LoginScreen
 import ru.fromchat.ui.auth.RegisterScreen
 import ru.fromchat.ui.chat.ChatScreen
+import ru.fromchat.ui.chat.PublicChatScreen
+
+val LocalNavController = compositionLocalOf<NavController> { error("") }
 
 @Composable
 fun App() {
@@ -18,6 +24,9 @@ fun App() {
         val navController = rememberNavController()
         val animationSpec = tween<IntOffset>(400)
 
+        CompositionLocalProvider(
+            LocalNavController provides navController
+        ) {
             NavHost(
                 navController = navController,
                 startDestination = "login",
@@ -60,6 +69,11 @@ fun App() {
                 }
 
                 composable("chat") { ChatScreen() }
+
+                composable("chats/publicChat") {
+                    PublicChatScreen()
+                }
+            }
         }
     }
 }

app/src/main/java/ru/fromchat/ui/chat/ChatScreen.kt

@@ -9,6 +9,7 @@ import androidx.compose.material.icons.automirrored.filled.Chat
 import androidx.compose.material.icons.filled.Contacts
 import androidx.compose.material.icons.filled.Mail
 import androidx.compose.material3.Icon
+import androidx.compose.material3.ListItem
 import androidx.compose.material3.NavigationBar
 import androidx.compose.material3.NavigationBarItem
 import androidx.compose.material3.Scaffold
@@ -20,13 +21,14 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
+import ru.fromchat.ui.LocalNavController
 
 enum class ChatTab { CHATS, CONTACTS, DMS }
 
 @Composable
 fun ChatScreen() {
     var selectedTab by remember { mutableStateOf(ChatTab.CHATS) }
-    var activeChat by remember { mutableStateOf<String?>(null) }
+    val navController = LocalNavController.current
 
     Scaffold(
         bottomBar = {
@@ -51,16 +53,17 @@ fun ChatScreen() {
                 )
             }
         }
-    ) { paddingValues ->
-        Column(modifier = Modifier.fillMaxSize().padding(paddingValues).padding(12.dp)) {
+    ) { innerPadding ->
+        Column(modifier = Modifier.fillMaxSize().padding(innerPadding).padding(12.dp)) {
             when (selectedTab) {
                 ChatTab.CHATS -> {
-                    if (activeChat == null) {
-                        Text("Общий чат", modifier = Modifier.clickable { activeChat = "Общий чат" }.padding(8.dp))
-                        Text("Общий чат 2", modifier = Modifier.clickable { activeChat = "Общий чат 2" }.padding(8.dp))
-                    } else {
-                        BaseChat(chatTitle = activeChat!!)
+                    ListItem(
+                        headlineContent = { Text("Public chat") },
+                        supportingContent = { Text("You: last message") },
+                        modifier = Modifier.clickable {
+                            navController.navigate("chats/publicChat")
                         }
+                    )
                 }
                 ChatTab.CONTACTS -> {
                     Text("Скоро будет...")

app/src/main/java/ru/fromchat/ui/chat/PublicChatScreen.kt

@@ -0,0 +1,141 @@
+package ru.fromchat.ui.chat
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.IntrinsicSize
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.DoneAll
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import ru.fromchat.ui.LocalNavController
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun PublicChatScreen() {
+    val navController = LocalNavController.current
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Text(
+                        text = "Public Chat",
+                        maxLines = 1,
+                        overflow = TextOverflow.Ellipsis
+                    )
+                },
+                navigationIcon = {
+                    IconButton(
+                        onClick = {
+                            navController.navigateUp()
+                        }
+                    ) {
+                        Icon(
+                            imageVector = Icons.AutoMirrored.Filled.ArrowBack,
+                            contentDescription = "Back"
+                        )
+                    }
+                }
+            )
+        }
+    ) { innerPadding ->
+        Column(
+            Modifier
+                .padding(innerPadding)
+                .verticalScroll(rememberScrollState())
+        ) {
+            @Composable
+            fun Message(
+                text: String,
+                isAuthor: Boolean,
+                isRead: Boolean,
+                timestamp: String
+            ) {
+                Row(
+                    modifier = Modifier
+                        .padding(horizontal = 16.dp, vertical = 4.dp)
+                        .fillMaxWidth(),
+                    horizontalArrangement = if (isAuthor) Arrangement.End else Arrangement.Start
+                ) {
+                    val background =
+                        if (isAuthor)
+                            MaterialTheme.colorScheme.primaryContainer
+                        else MaterialTheme.colorScheme.surfaceContainer
+
+                    Column(
+                        Modifier
+                            .clip(
+                                RoundedCornerShape(
+                                    if (isAuthor) 16.dp else 5.dp,
+                                    16.dp,
+                                    if (isAuthor) 5.dp else 16.dp,
+                                    16.dp
+                                )
+                            )
+                            .background(background)
+                            .padding(10.dp)
+                            .width(IntrinsicSize.Max)
+                    ) {
+                        Text(text)
+                        Row(
+                            verticalAlignment = Alignment.CenterVertically,
+                            horizontalArrangement = Arrangement.spacedBy(0.dp, Alignment.End),
+                            modifier = Modifier.fillMaxWidth()
+                        ) {
+                            Spacer(Modifier.weight(1f))
+                            Text(
+                                text = timestamp,
+                                fontSize = 14.sp
+                            )
+                            if (isRead) {
+                                Icon(
+                                    imageVector = Icons.Filled.DoneAll,
+                                    contentDescription = "Read",
+                                    modifier = Modifier.size(17.dp)
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+
+            repeat(100) {
+                Message(
+                    text = "test",
+                    isAuthor = true,
+                    isRead = true,
+                    timestamp = "9:41"
+                )
+                Message(
+                    text = "test2",
+                    isAuthor = false,
+                    isRead = true,
+                    timestamp = "9:41"
+                )
+            }
+        }
+    }
+}