Create the skeleton of the RoomActivity

app/src/main/java/eu/steffo/twom/create/AvatarSelector.kt

@@ -9,7 +9,7 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.asImageBitmap
@@ -26,7 +26,7 @@ fun AvatarSelector(
     val context = LocalContext.current
     val resolver = context.contentResolver
 
-    var selection by rememberSaveable { mutableStateOf<Bitmap?>(null) }
+    var selection by remember { mutableStateOf<Bitmap?>(null) }
 
     val launcher =
         rememberLauncherForActivityResult(ActivityResultContracts.PickVisualMedia()) ImageSelect@{

app/src/main/java/eu/steffo/twom/matrix/avatar/AvatarFromURL.kt

@@ -7,7 +7,7 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.asImageBitmap
@@ -23,7 +23,7 @@ fun AvatarFromURL(
     contentDescription: String = "",
 ) {
     val session = LocalSession.current
-    var bitmap by rememberSaveable { mutableStateOf<Bitmap?>(null) }
+    var bitmap by remember { mutableStateOf<Bitmap?>(null) }
 
     LaunchedEffect(session, url) GetAvatar@{
         if (session == null) {

app/src/main/java/eu/steffo/twom/room/LocalRoom.kt

@@ -0,0 +1,6 @@
+package eu.steffo.twom.room
+
+import androidx.compose.runtime.staticCompositionLocalOf
+import org.matrix.android.sdk.api.session.room.model.RoomSummary
+
+val LocalRoom = staticCompositionLocalOf<RoomSummary?> { null }

app/src/main/java/eu/steffo/twom/room/RoomActivity.kt

@@ -1,9 +1,46 @@
 package eu.steffo.twom.room
 
+import android.os.Bundle
+import android.util.Log
 import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import eu.steffo.twom.matrix.TwoMMatrix
+import org.matrix.android.sdk.api.session.Session
 
 class RoomActivity : ComponentActivity() {
     companion object {
         const val ROOM_ID_EXTRA = "roomId"
     }
+
+    private lateinit var session: Session
+
+    private fun fetchLastSession() {
+        Log.d("Main", "Fetching the last successfully authenticated session...")
+        // FIXME: If this is null, it means that something launched this while no session was authenticated...
+        session = TwoMMatrix.matrix.authenticationService().getLastAuthenticatedSession()!!
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        // FIXME: Hopefully, if this succeeds, the session is also open... hopefully.
+        fetchLastSession()
+    }
+
+    override fun onStart() {
+        super.onStart()
+
+        val roomId = intent.getStringExtra(ROOM_ID_EXTRA)
+
+        setContent {
+            RoomActivityScaffold(
+                session = session,
+                roomId = roomId!!,  // FIXME: Again, this should be set. Should.
+                onBack = {
+                    setResult(RESULT_CANCELED)
+                    finish()
+                },
+            )
+        }
+    }
 }

app/src/main/java/eu/steffo/twom/room/RoomActivityContent.kt

@@ -0,0 +1,13 @@
+package eu.steffo.twom.room
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+
+@Composable
+@Preview(showBackground = true)
+fun RoomActivityContent(
+    modifier: Modifier = Modifier,
+) {
+
+}

app/src/main/java/eu/steffo/twom/room/RoomActivityRoomIconButton.kt

@@ -0,0 +1,73 @@
+package eu.steffo.twom.room
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.ripple.rememberRipple
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.minimumInteractiveComponentSize
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.semantics.Role
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import eu.steffo.twom.R
+import eu.steffo.twom.matrix.avatar.AvatarFromURL
+
+@Composable
+@Preview(showBackground = true)
+fun RoomActivityRoomIconButton(
+    modifier: Modifier = Modifier,
+    interactionSource: MutableInteractionSource = remember { MutableInteractionSource() },
+) {
+    var expanded by remember { mutableStateOf(false) }
+
+    Box(modifier) {
+        // Mostly copied from IconButton's source
+        // TODO: Make sure accessibility works right
+        // FIXME: This will need changes when Material 4 is released
+        Box(
+            modifier = Modifier
+                .minimumInteractiveComponentSize()
+                .size(40.dp)
+                .clip(MaterialTheme.shapes.medium)
+                .clickable(
+                    role = Role.Button,
+                    interactionSource = interactionSource,
+                    indication = rememberRipple(
+                        bounded = false,
+                        radius = 28.dp
+                    )
+                ) { expanded = true },
+        ) {
+            AvatarFromURL(
+                url = LocalRoom.current!!.avatarUrl,
+                contentDescription = LocalContext.current.getString(R.string.room_options_label),
+            )
+        }
+        DropdownMenu(
+            expanded = expanded,
+            onDismissRequest = { expanded = false },
+        ) {
+            DropdownMenuItem(
+                text = {
+                    Text("garasauto")
+                },
+                onClick = {
+                    expanded = false
+                }
+            )
+        }
+    }
+
+}

app/src/main/java/eu/steffo/twom/room/RoomActivityScaffold.kt

@@ -0,0 +1,39 @@
+package eu.steffo.twom.room
+
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Scaffold
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.ui.Modifier
+import eu.steffo.twom.matrix.LocalSession
+import eu.steffo.twom.theme.TwoMTheme
+import org.matrix.android.sdk.api.session.Session
+import org.matrix.android.sdk.api.session.getRoomSummary
+
+@Composable
+fun RoomActivityScaffold(
+    session: Session,
+    roomId: String,
+    onBack: () -> Unit = {},
+) {
+    val roomSummary = session.getRoomSummary(roomId)
+
+    TwoMTheme {
+        CompositionLocalProvider(LocalSession provides session) {
+            CompositionLocalProvider(LocalRoom provides roomSummary) {
+                Scaffold(
+                    topBar = {
+                        RoomActivityTopBar(
+                            onBack = onBack,
+                        )
+                    },
+                    content = {
+                        RoomActivityContent(
+                            modifier = Modifier.padding(it),
+                        )
+                    },
+                )
+            }
+        }
+    }
+}

app/src/main/java/eu/steffo/twom/room/RoomActivityTopBar.kt

@@ -0,0 +1,43 @@
+package eu.steffo.twom.room
+
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.tooling.preview.Preview
+import eu.steffo.twom.R
+
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+@Preview
+fun RoomActivityTopBar(
+    modifier: Modifier = Modifier,
+    onBack: () -> Unit = {},
+    roomName: String = "{Room name}",
+    roomAvatarURL: String? = null,
+) {
+    TopAppBar(
+        modifier = modifier,
+        navigationIcon = {
+            IconButton(onClick = onBack) {
+                Icon(
+                    imageVector = Icons.Filled.ArrowBack,
+                    contentDescription = LocalContext.current.getString(R.string.back)
+                )
+            }
+        },
+        title = {
+            Text(LocalRoom.current!!.name)
+        },
+        actions = {
+            RoomActivityRoomIconButton()
+        },
+    )
+}

app/src/main/res/values/strings.xml

@@ -32,4 +32,5 @@
     <string name="create_avatar_label">Select happening avatar</string>
     <string name="create_description_label">Description</string>
     <string name="create_complete_text">Create</string>
+    <string name="room_options_label">Room options</string>
 </resources>