BIT-852: Add account switcher UI (#235)

app/src/main/java/com/x8bit/bitwarden/data/auth/repository/model/AccountSummary.kt

@@ -0,0 +1,43 @@
+package com.x8bit.bitwarden.data.auth.repository.model
+
+import android.os.Parcelable
+import kotlinx.parcelize.Parcelize
+
+/**
+ * Summary information about a user's account.
+ *
+ * @property userId The ID of the user.
+ * @property name The full name of the user.
+ * @property email The email of the user.
+ * @property avatarColorHex Hex color value for a user's avatar in the "#AARRGGBB" format.
+ * @property status The current status of the user's account locally.
+ */
+@Parcelize
+data class AccountSummary(
+    val userId: String,
+    val name: String,
+    val email: String,
+    val avatarColorHex: String,
+    val status: Status,
+) : Parcelable {
+
+    /**
+     * Describes the status of the given account.
+     */
+    enum class Status {
+        /**
+         * The account is currently the active one.
+         */
+        ACTIVE,
+
+        /**
+         * The account is currently locked.
+         */
+        LOCKED,
+
+        /**
+         * The account is currently unlocked.
+         */
+        UNLOCKED,
+    }
+}

app/src/main/java/com/x8bit/bitwarden/ui/platform/base/util/StringExtensions.kt

@@ -1,9 +1,12 @@
 package com.x8bit.bitwarden.ui.platform.base.util
 
+import androidx.compose.runtime.Composable
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.AnnotatedString
 import androidx.core.graphics.toColorInt
 import java.net.URI
+import java.util.Locale
 
 /**
  * Whether or not string is a valid email address.
@@ -25,6 +28,15 @@ fun String.isValidUri(): Boolean =
         false
     }
 
+/**
+ * Returns the given [String] in a lowercase form using the primary [Locale] from the current
+ * context.
+ */
+@Composable
+fun String.lowercaseWithCurrentLocal(): String {
+    return lowercase(LocalContext.current.resources.configuration.locales[0])
+}
+
 /**
  * Returns the [String] as an [AnnotatedString].
  */

app/src/main/java/com/x8bit/bitwarden/ui/platform/components/BitwardenAccountSwitcher.kt

@@ -0,0 +1,263 @@
+package com.x8bit.bitwarden.ui.platform.components
+
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.slideInVertically
+import androidx.compose.animation.slideOutVertically
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+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.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.ripple.rememberRipple
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBarScrollBehavior
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.lerp
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.semantics.clearAndSetSemantics
+import androidx.compose.ui.unit.dp
+import androidx.core.graphics.toColorInt
+import com.x8bit.bitwarden.R
+import com.x8bit.bitwarden.data.auth.repository.model.AccountSummary
+import com.x8bit.bitwarden.ui.platform.base.util.lowercaseWithCurrentLocal
+import com.x8bit.bitwarden.ui.platform.base.util.toUnscaledTextUnit
+import com.x8bit.bitwarden.ui.vault.feature.vault.util.iconRes
+import com.x8bit.bitwarden.ui.vault.feature.vault.util.initials
+import com.x8bit.bitwarden.ui.vault.feature.vault.util.supportingTextResOrNull
+import kotlinx.collections.immutable.ImmutableList
+
+/**
+ * An account switcher that will slide down inside whatever parent is it placed in and add a
+ * a scrim via a [BitwardenAnimatedScrim] to all content below it (but not above it). Additional
+ * [BitwardenAnimatedScrim] may be manually placed over other components that might not be covered
+ * by the internal one.
+ *
+ * Note that this is intended to be used in conjunction with screens containing a top app bar but
+ * should be placed with the screen's content and not with the bar itself.
+ *
+ * @param isVisible Whether or not this component is visible. Changing this value will animate the
+ * component in or out of view.
+ * @param accountSummaries The accounts to display in the switcher.
+ * @param onAccountSummaryClick A callback when an account is clicked.
+ * @param onAddAccountClick A callback when the Add Account row is clicked.
+ * @param onDismissRequest A callback when the component requests to be dismissed. This is triggered
+ * whenever the user clicks on the scrim or any of the switcher items.
+ * @param modifier A [Modifier] for the composable.
+ * @param topAppBarScrollBehavior Used to derive the background color of the content and keep it in
+ * sync with the associated app bar.
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun BitwardenAccountSwitcher(
+    isVisible: Boolean,
+    accountSummaries: ImmutableList<AccountSummary>,
+    onAccountSummaryClick: (AccountSummary) -> Unit,
+    onAddAccountClick: () -> Unit,
+    onDismissRequest: () -> Unit,
+    modifier: Modifier = Modifier,
+    topAppBarScrollBehavior: TopAppBarScrollBehavior,
+) {
+    // Match the color of the switcher the different states of the app bar.
+    val contentBackgroundColor =
+        lerp(
+            start = MaterialTheme.colorScheme.surface,
+            stop = MaterialTheme.colorScheme.surfaceContainer,
+            fraction = topAppBarScrollBehavior.state.collapsedFraction,
+        )
+    Box(modifier = modifier) {
+        BitwardenAnimatedScrim(
+            isVisible = isVisible,
+            onClick = onDismissRequest,
+            modifier = Modifier
+                .fillMaxSize(),
+        )
+        AnimatedAccountSwitcher(
+            isVisible = isVisible,
+            accountSummaries = accountSummaries,
+            onAccountSummaryClick = {
+                onDismissRequest()
+                onAccountSummaryClick(it)
+            },
+            onAddAccountClick = {
+                onDismissRequest()
+                onAddAccountClick()
+            },
+            contentBackgroundColor = contentBackgroundColor,
+            modifier = Modifier
+                .fillMaxWidth(),
+        )
+    }
+}
+
+@Composable
+private fun AnimatedAccountSwitcher(
+    isVisible: Boolean,
+    accountSummaries: ImmutableList<AccountSummary>,
+    onAccountSummaryClick: (AccountSummary) -> Unit,
+    onAddAccountClick: () -> Unit,
+    modifier: Modifier = Modifier,
+    contentBackgroundColor: Color,
+) {
+    AnimatedVisibility(
+        visible = isVisible,
+        enter = slideInVertically { -it },
+        exit = slideOutVertically { -it },
+    ) {
+        LazyColumn(
+            modifier = modifier
+                // To prevent going all the way up to the bottom of the screen, we'll add some small
+                // bottom padding.
+                .padding(bottom = 24.dp)
+                .background(contentBackgroundColor),
+        ) {
+            items(accountSummaries) { accountSummary ->
+                AccountSummaryItem(
+                    accountSummary = accountSummary,
+                    onClick = onAccountSummaryClick,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp),
+                )
+            }
+            item {
+                HorizontalDivider(
+                    thickness = 1.dp,
+                    color = MaterialTheme.colorScheme.outlineVariant,
+                )
+            }
+            item {
+                AddAccountItem(
+                    onClick = onAddAccountClick,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp),
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun AccountSummaryItem(
+    accountSummary: AccountSummary,
+    onClick: (AccountSummary) -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Row(
+        horizontalArrangement = Arrangement.Start,
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier
+            .clickable(
+                interactionSource = remember { MutableInteractionSource() },
+                indication = rememberRipple(color = MaterialTheme.colorScheme.primary),
+                onClick = { onClick(accountSummary) },
+            )
+            .padding(vertical = 8.dp)
+            .then(modifier),
+    ) {
+        Box(
+            contentAlignment = Alignment.Center,
+        ) {
+            Icon(
+                painter = painterResource(id = R.drawable.ic_account_initials_container),
+                contentDescription = null,
+                tint = Color(accountSummary.avatarColorHex.toColorInt()),
+                modifier = Modifier.size(40.dp),
+            )
+
+            Text(
+                text = accountSummary.initials,
+                style = MaterialTheme.typography.titleMedium
+                    // Do not allow scaling
+                    .copy(fontSize = 16.dp.toUnscaledTextUnit()),
+                color = MaterialTheme.colorScheme.surface,
+                modifier = Modifier.clearAndSetSemantics { },
+            )
+        }
+
+        Spacer(modifier = Modifier.width(16.dp))
+
+        Column(
+            modifier = Modifier.weight(1f),
+        ) {
+            Text(
+                text = accountSummary.email,
+                style = MaterialTheme.typography.bodyLarge,
+            )
+
+            accountSummary.supportingTextResOrNull?.let { supportingTextResId ->
+                Text(
+                    text = stringResource(id = supportingTextResId).lowercaseWithCurrentLocal(),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+
+        Spacer(modifier = Modifier.width(16.dp))
+
+        Icon(
+            painter = painterResource(id = accountSummary.iconRes),
+            contentDescription = null,
+            tint = MaterialTheme.colorScheme.onSurface,
+            modifier = Modifier
+                .size(24.dp),
+        )
+
+        Spacer(modifier = Modifier.width(8.dp))
+    }
+}
+
+@Composable
+private fun AddAccountItem(
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Row(
+        horizontalArrangement = Arrangement.Start,
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier
+            .clickable(
+                interactionSource = remember { MutableInteractionSource() },
+                indication = rememberRipple(color = MaterialTheme.colorScheme.primary),
+                onClick = onClick,
+            )
+            .padding(vertical = 8.dp)
+            .then(modifier),
+    ) {
+        Icon(
+            painter = painterResource(id = R.drawable.ic_plus),
+            contentDescription = null,
+            tint = MaterialTheme.colorScheme.onSurface,
+            modifier = Modifier
+                .padding(vertical = 8.dp)
+                .size(24.dp),
+        )
+
+        Spacer(modifier = Modifier.width(16.dp))
+
+        Text(
+            text = stringResource(id = R.string.add_account),
+            style = MaterialTheme.typography.bodyLarge,
+        )
+    }
+}

app/src/main/java/com/x8bit/bitwarden/ui/platform/components/BitwardenAnimatedScrim.kt

@@ -0,0 +1,45 @@
+package com.x8bit.bitwarden.ui.platform.components
+
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.Box
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+
+/**
+ * A scrim that animates its visibility.
+ *
+ * @param isVisible Whether or not the scrim should be visible. This controls the animation.
+ * @param onClick A callback that is triggered when the scrim is clicked. No ripple will be
+ * performed.
+ * @param modifier A [Modifier] for the scrim's content.
+ */
+@Composable
+fun BitwardenAnimatedScrim(
+    isVisible: Boolean,
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    AnimatedVisibility(
+        visible = isVisible,
+        enter = fadeIn(),
+        exit = fadeOut(),
+    ) {
+        Box(
+            modifier = modifier
+                .background(Color.Black.copy(alpha = 0.40f))
+                .clickable(
+                    interactionSource = remember { MutableInteractionSource() },
+                    // Clear the ripple
+                    indication = null,
+                    onClick = onClick,
+                ),
+        )
+    }
+}

app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/vaultunlockednavbar/VaultUnlockedNavBarScreen.kt

@@ -1,9 +1,12 @@
 package com.x8bit.bitwarden.ui.platform.feature.vaultunlockednavbar
 
 import android.os.Parcelable
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.consumeWindowInsets
 import androidx.compose.foundation.layout.exclude
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.ime
 import androidx.compose.foundation.layout.navigationBars
 import androidx.compose.foundation.layout.padding
@@ -17,7 +20,12 @@ import androidx.compose.material3.ScaffoldDefaults
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.layout.onGloballyPositioned
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.hilt.navigation.compose.hiltViewModel
@@ -32,6 +40,8 @@ import androidx.navigation.navOptions
 import com.x8bit.bitwarden.R
 import com.x8bit.bitwarden.ui.platform.base.util.EventsEffect
 import com.x8bit.bitwarden.ui.platform.base.util.max
+import com.x8bit.bitwarden.ui.platform.base.util.toDp
+import com.x8bit.bitwarden.ui.platform.components.BitwardenAnimatedScrim
 import com.x8bit.bitwarden.ui.platform.components.BitwardenScaffold
 import com.x8bit.bitwarden.ui.platform.feature.settings.SETTINGS_GRAPH_ROUTE
 import com.x8bit.bitwarden.ui.platform.feature.settings.navigateToSettingsGraph
@@ -113,66 +123,36 @@ private fun VaultUnlockedNavBarScaffold(
     navigateToVaultAddItem: () -> Unit,
     navigateToNewSend: () -> Unit,
 ) {
+    var shouldDimNavBar by remember { mutableStateOf(false) }
+
     // This scaffold will host screens that contain top bars while not hosting one itself.
     // We need to ignore the status bar insets here and let the content screens handle
     // it themselves.
     BitwardenScaffold(
         contentWindowInsets = ScaffoldDefaults.contentWindowInsets.exclude(WindowInsets.statusBars),
         bottomBar = {
-            BottomAppBar(
+            Box {
-                containerColor = MaterialTheme.colorScheme.surfaceContainer,
+                var appBarHeightPx by remember { mutableIntStateOf(0) }
-            ) {
+                VaultBottomAppBar(
-                val destinations = listOf(
+                    navController = navController,
-                    VaultUnlockedNavBarTab.Vault,
+                    vaultTabClickedAction = vaultTabClickedAction,
-                    VaultUnlockedNavBarTab.Send,
+                    sendTabClickedAction = sendTabClickedAction,
-                    VaultUnlockedNavBarTab.Generator,
+                    generatorTabClickedAction = generatorTabClickedAction,
-                    VaultUnlockedNavBarTab.Settings,
+                    settingsTabClickedAction = settingsTabClickedAction,
+                    modifier = Modifier
+                        .onGloballyPositioned {
+                            appBarHeightPx = it.size.height
+                        },
+                )
+                BitwardenAnimatedScrim(
+                    isVisible = shouldDimNavBar,
+                    onClick = {
+                        // Do nothing
+                    },
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(appBarHeightPx.toDp()),
                 )
-                val navBackStackEntry by navController.currentBackStackEntryAsState()
-                val currentDestination = navBackStackEntry?.destination
-                destinations.forEach { destination ->
-
-                    val isSelected = currentDestination?.hierarchy?.any {
-                        it.route == destination.route
-                    } == true
-
-                    NavigationBarItem(
-                        icon = {
-                            Icon(
-                                painter = painterResource(
-                                    id = if (isSelected) {
-                                        destination.iconResSelected
-                                    } else {
-                                        destination.iconRes
-                                    },
-                                ),
-                                contentDescription = stringResource(
-                                    id = destination.contentDescriptionRes,
-                                ),
-                                tint = if (isSelected) {
-                                    MaterialTheme.colorScheme.onSecondaryContainer
-                                } else {
-                                    MaterialTheme.colorScheme.onSurface
-                                },
-                            )
-                        },
-                        label = {
-                            Text(text = stringResource(id = destination.labelRes))
-                        },
-                        selected = isSelected,
-                        onClick = {
-                            when (destination) {
-                                VaultUnlockedNavBarTab.Vault -> vaultTabClickedAction()
-                                VaultUnlockedNavBarTab.Send -> sendTabClickedAction()
-                                VaultUnlockedNavBarTab.Generator -> generatorTabClickedAction()
-                                VaultUnlockedNavBarTab.Settings -> settingsTabClickedAction()
-                            }
-                        },
-                        colors = NavigationBarItemDefaults.colors(
-                            indicatorColor = MaterialTheme.colorScheme.secondaryContainer,
-                        ),
-                    )
-                }
             }
         },
     ) { innerPadding ->
@@ -195,6 +175,9 @@ private fun VaultUnlockedNavBarScaffold(
                 onNavigateToVaultAddItemScreen = {
                     navigateToVaultAddItem()
                 },
+                onDimBottomNavBarRequest = { shouldDim ->
+                    shouldDimNavBar = shouldDim
+                },
             )
             sendGraph(onNavigateToNewSend = navigateToNewSend)
             generatorDestination()
@@ -203,6 +186,73 @@ private fun VaultUnlockedNavBarScaffold(
     }
 }
 
+@Composable
+private fun VaultBottomAppBar(
+    navController: NavHostController,
+    vaultTabClickedAction: () -> Unit,
+    sendTabClickedAction: () -> Unit,
+    generatorTabClickedAction: () -> Unit,
+    settingsTabClickedAction: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    BottomAppBar(
+        containerColor = MaterialTheme.colorScheme.surfaceContainer,
+        modifier = modifier,
+    ) {
+        val destinations = listOf(
+            VaultUnlockedNavBarTab.Vault,
+            VaultUnlockedNavBarTab.Send,
+            VaultUnlockedNavBarTab.Generator,
+            VaultUnlockedNavBarTab.Settings,
+        )
+        val navBackStackEntry by navController.currentBackStackEntryAsState()
+        val currentDestination = navBackStackEntry?.destination
+        destinations.forEach { destination ->
+
+            val isSelected = currentDestination?.hierarchy?.any {
+                it.route == destination.route
+            } == true
+
+            NavigationBarItem(
+                icon = {
+                    Icon(
+                        painter = painterResource(
+                            id = if (isSelected) {
+                                destination.iconResSelected
+                            } else {
+                                destination.iconRes
+                            },
+                        ),
+                        contentDescription = stringResource(
+                            id = destination.contentDescriptionRes,
+                        ),
+                        tint = if (isSelected) {
+                            MaterialTheme.colorScheme.onSecondaryContainer
+                        } else {
+                            MaterialTheme.colorScheme.onSurface
+                        },
+                    )
+                },
+                label = {
+                    Text(text = stringResource(id = destination.labelRes))
+                },
+                selected = isSelected,
+                onClick = {
+                    when (destination) {
+                        VaultUnlockedNavBarTab.Vault -> vaultTabClickedAction()
+                        VaultUnlockedNavBarTab.Send -> sendTabClickedAction()
+                        VaultUnlockedNavBarTab.Generator -> generatorTabClickedAction()
+                        VaultUnlockedNavBarTab.Settings -> settingsTabClickedAction()
+                    }
+                },
+                colors = NavigationBarItemDefaults.colors(
+                    indicatorColor = MaterialTheme.colorScheme.secondaryContainer,
+                ),
+            )
+        }
+    }
+}
+
 /**
  * Represents the different tabs available in the navigation bar
  * for the unlocked portion of the vault.

app/src/main/java/com/x8bit/bitwarden/ui/vault/feature/vault/VaultNavigation.kt

@@ -12,10 +12,12 @@ const val VAULT_ROUTE: String = "vault"
  */
 fun NavGraphBuilder.vaultDestination(
     onNavigateToVaultAddItemScreen: () -> Unit,
+    onDimBottomNavBarRequest: (shouldDim: Boolean) -> Unit,
 ) {
     composable(VAULT_ROUTE) {
         VaultScreen(
             onNavigateToVaultAddItemScreen = onNavigateToVaultAddItemScreen,
+            onDimBottomNavBarRequest = onDimBottomNavBarRequest,
         )
     }
 }

app/src/main/java/com/x8bit/bitwarden/ui/vault/feature/vault/VaultScreen.kt

@@ -2,8 +2,11 @@ package com.x8bit.bitwarden.ui.vault.feature.vault
 
 import android.widget.Toast
 import androidx.compose.animation.AnimatedVisibility
-import androidx.compose.animation.expandIn
+import androidx.compose.animation.scaleIn
-import androidx.compose.animation.fadeIn
+import androidx.compose.animation.scaleOut
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.FloatingActionButton
 import androidx.compose.material3.Icon
@@ -22,15 +25,17 @@ import androidx.compose.ui.input.nestedscroll.nestedScroll
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.unit.IntSize
 import androidx.hilt.navigation.compose.hiltViewModel
 import com.x8bit.bitwarden.R
+import com.x8bit.bitwarden.data.auth.repository.model.AccountSummary
 import com.x8bit.bitwarden.ui.platform.base.util.EventsEffect
 import com.x8bit.bitwarden.ui.platform.components.BitwardenAccountActionItem
+import com.x8bit.bitwarden.ui.platform.components.BitwardenAccountSwitcher
 import com.x8bit.bitwarden.ui.platform.components.BitwardenMediumTopAppBar
 import com.x8bit.bitwarden.ui.platform.components.BitwardenOverflowActionItem
 import com.x8bit.bitwarden.ui.platform.components.BitwardenScaffold
 import com.x8bit.bitwarden.ui.platform.components.BitwardenSearchActionItem
+import kotlinx.collections.immutable.toImmutableList
 
 /**
  * The vault screen for the application.
@@ -40,6 +45,7 @@ import com.x8bit.bitwarden.ui.platform.components.BitwardenSearchActionItem
 fun VaultScreen(
     viewModel: VaultViewModel = hiltViewModel(),
     onNavigateToVaultAddItemScreen: () -> Unit,
+    onDimBottomNavBarRequest: (shouldDim: Boolean) -> Unit,
 ) {
     val context = LocalContext.current
     EventsEffect(viewModel = viewModel) { event ->
@@ -94,6 +100,26 @@ fun VaultScreen(
                     .makeText(context, "Navigate to trash screen.", Toast.LENGTH_SHORT)
                     .show()
             }
+
+            VaultEvent.NavigateToLoginScreen -> {
+                // TODO: Handle adding accounts (BIT-853)
+                Toast
+                    .makeText(context, "Not yet implemented.", Toast.LENGTH_SHORT)
+                    .show()
+            }
+
+            VaultEvent.NavigateToVaultUnlockScreen -> {
+                // TODO: Handle unlocking accounts (BIT-853)
+                Toast
+                    .makeText(context, "Not yet implemented.", Toast.LENGTH_SHORT)
+                    .show()
+            }
+
+            is VaultEvent.ShowToast -> {
+                Toast
+                    .makeText(context, event.message, Toast.LENGTH_SHORT)
+                    .show()
+            }
         }
     }
     VaultScreenScaffold(
@@ -104,6 +130,13 @@ fun VaultScreen(
         searchIconClickAction = remember(viewModel) {
             { viewModel.trySendAction(VaultAction.SearchIconClick) }
         },
+        accountSwitchClickAction = remember(viewModel) {
+            { viewModel.trySendAction(VaultAction.AccountSwitchClick(it)) }
+        },
+        addAccountClickAction = remember(viewModel) {
+            { viewModel.trySendAction(VaultAction.AddAccountClick) }
+        },
+        onDimBottomNavBarRequest = onDimBottomNavBarRequest,
         vaultItemClick = remember(viewModel) {
             { vaultItem -> viewModel.trySendAction(VaultAction.VaultItemClick(vaultItem)) }
         },
@@ -138,6 +171,9 @@ private fun VaultScreenScaffold(
     state: VaultState,
     addItemClickAction: () -> Unit,
     searchIconClickAction: () -> Unit,
+    accountSwitchClickAction: (AccountSummary) -> Unit,
+    addAccountClickAction: () -> Unit,
+    onDimBottomNavBarRequest: (shouldDim: Boolean) -> Unit,
     vaultItemClick: (VaultState.ViewState.VaultItem) -> Unit,
     folderClick: (VaultState.ViewState.FolderItem) -> Unit,
     loginGroupClick: () -> Unit,
@@ -146,12 +182,18 @@ private fun VaultScreenScaffold(
     secureNoteGroupClick: () -> Unit,
     trashClick: () -> Unit,
 ) {
-    // TODO Create account menu and logging in ability BIT-205
     var accountMenuVisible by rememberSaveable {
         mutableStateOf(false)
     }
+    val updateAccountMenuVisibility = { shouldShowMenu: Boolean ->
+        accountMenuVisible = shouldShowMenu
+        onDimBottomNavBarRequest(shouldShowMenu)
+    }
     val scrollBehavior =
-        TopAppBarDefaults.exitUntilCollapsedScrollBehavior(rememberTopAppBarState())
+        TopAppBarDefaults.exitUntilCollapsedScrollBehavior(
+            state = rememberTopAppBarState(),
+            canScroll = { !accountMenuVisible },
+        )
 
     BitwardenScaffold(
         topBar = {
@@ -162,7 +204,9 @@ private fun VaultScreenScaffold(
                     BitwardenAccountActionItem(
                         initials = state.initials,
                         color = state.avatarColor,
-                        onClick = { accountMenuVisible = !accountMenuVisible },
+                        onClick = {
+                            updateAccountMenuVisibility(!accountMenuVisible)
+                        },
                     )
                     BitwardenSearchActionItem(
                         contentDescription = stringResource(id = R.string.search_vault),
@@ -175,9 +219,8 @@ private fun VaultScreenScaffold(
         floatingActionButton = {
             AnimatedVisibility(
                 visible = !accountMenuVisible,
-                // The enter transition is required for AnimatedVisibility to work correctly on
+                enter = scaleIn(),
-                // FloatingActionButton. See - https://issuetracker.google.com/issues/224005027?pli=1
+                exit = scaleOut(),
-                enter = fadeIn() + expandIn { IntSize(width = 1, height = 1) },
             ) {
                 FloatingActionButton(
                     containerColor = MaterialTheme.colorScheme.primaryContainer,
@@ -193,23 +236,37 @@ private fun VaultScreenScaffold(
         },
         modifier = Modifier.nestedScroll(scrollBehavior.nestedScrollConnection),
     ) { paddingValues ->
-        when (val viewState = state.viewState) {
+        Box {
-            is VaultState.ViewState.Content -> VaultContent(
+            when (val viewState = state.viewState) {
-                state = viewState,
+                is VaultState.ViewState.Content -> VaultContent(
-                vaultItemClick = vaultItemClick,
+                    state = viewState,
-                folderClick = folderClick,
+                    vaultItemClick = vaultItemClick,
-                loginGroupClick = loginGroupClick,
+                    folderClick = folderClick,
-                cardGroupClick = cardGroupClick,
+                    loginGroupClick = loginGroupClick,
-                identityGroupClick = identityGroupClick,
+                    cardGroupClick = cardGroupClick,
-                secureNoteGroupClick = secureNoteGroupClick,
+                    identityGroupClick = identityGroupClick,
-                trashClick = trashClick,
+                    secureNoteGroupClick = secureNoteGroupClick,
-                paddingValues = paddingValues,
+                    trashClick = trashClick,
-            )
+                    paddingValues = paddingValues,
+                )
 
-            is VaultState.ViewState.Loading -> VaultLoading(paddingValues = paddingValues)
+                is VaultState.ViewState.Loading -> VaultLoading(paddingValues = paddingValues)
-            is VaultState.ViewState.NoItems -> VaultNoItems(
+                is VaultState.ViewState.NoItems -> VaultNoItems(
-                paddingValues = paddingValues,
+                    paddingValues = paddingValues,
-                addItemClickAction = addItemClickAction,
+                    addItemClickAction = addItemClickAction,
+                )
+            }
+
+            BitwardenAccountSwitcher(
+                isVisible = accountMenuVisible,
+                accountSummaries = state.accountSummaries.toImmutableList(),
+                onAccountSummaryClick = accountSwitchClickAction,
+                onAddAccountClick = addAccountClickAction,
+                onDismissRequest = { updateAccountMenuVisibility(false) },
+                topAppBarScrollBehavior = scrollBehavior,
+                modifier = Modifier
+                    .fillMaxSize()
+                    .padding(paddingValues),
             )
         }
     }

app/src/main/java/com/x8bit/bitwarden/ui/vault/feature/vault/VaultViewModel.kt

@@ -6,12 +6,15 @@ import androidx.compose.ui.graphics.Color
 import androidx.lifecycle.SavedStateHandle
 import androidx.lifecycle.viewModelScope
 import com.x8bit.bitwarden.R
+import com.x8bit.bitwarden.data.auth.repository.model.AccountSummary
 import com.x8bit.bitwarden.ui.platform.base.BaseViewModel
 import com.x8bit.bitwarden.ui.platform.base.util.Text
 import com.x8bit.bitwarden.ui.platform.base.util.asText
 import com.x8bit.bitwarden.ui.platform.base.util.concat
 import com.x8bit.bitwarden.ui.platform.base.util.hexToColor
+import com.x8bit.bitwarden.ui.vault.feature.vault.util.initials
 import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.collections.immutable.persistentListOf
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -25,14 +28,16 @@ private const val KEY_STATE = "state"
 /**
  * Manages [VaultState], handles [VaultAction], and launches [VaultEvent] for the [VaultScreen].
  */
+@Suppress("TooManyFunctions")
 @HiltViewModel
 class VaultViewModel @Inject constructor(
     private val savedStateHandle: SavedStateHandle,
 ) : BaseViewModel<VaultState, VaultEvent, VaultAction>(
     // TODO retrieve this from the data layer BIT-205
     initialState = savedStateHandle[KEY_STATE] ?: VaultState(
-        initials = "BW",
+        initials = activeAccountSummary.initials,
-        avatarColorString = "FF0000FF",
+        avatarColorString = activeAccountSummary.avatarColorHex,
+        accountSummaries = accountSummaries,
         viewState = VaultState.ViewState.Loading,
     ),
 ) {
@@ -79,6 +84,8 @@ class VaultViewModel @Inject constructor(
             VaultAction.IdentityGroupClick -> handleIdentityClick()
             VaultAction.LoginGroupClick -> handleLoginClick()
             VaultAction.SearchIconClick -> handleSearchIconClick()
+            is VaultAction.AccountSwitchClick -> handleAccountSwitchClick(action)
+            VaultAction.AddAccountClick -> handleAddAccountClick()
             VaultAction.SecureNoteGroupClick -> handleSecureNoteClick()
             VaultAction.TrashClick -> handleTrashClick()
             is VaultAction.VaultItemClick -> handleVaultItemClick(action)
@@ -110,6 +117,28 @@ class VaultViewModel @Inject constructor(
         sendEvent(VaultEvent.NavigateToVaultSearchScreen)
     }
 
+    private fun handleAccountSwitchClick(action: VaultAction.AccountSwitchClick) {
+        when (action.accountSummary.status) {
+            AccountSummary.Status.ACTIVE -> {
+                // Nothing to do for the active account
+            }
+
+            AccountSummary.Status.LOCKED -> {
+                // TODO: Handle switching accounts (BIT-853)
+                sendEvent(VaultEvent.NavigateToVaultUnlockScreen)
+            }
+
+            AccountSummary.Status.UNLOCKED -> {
+                // TODO: Handle switching accounts (BIT-853)
+                sendEvent(VaultEvent.ShowToast(message = "Not yet implemented."))
+            }
+        }
+    }
+
+    private fun handleAddAccountClick() {
+        sendEvent(VaultEvent.NavigateToLoginScreen)
+    }
+
     private fun handleTrashClick() {
         sendEvent(VaultEvent.NavigateToTrash)
     }
@@ -124,6 +153,34 @@ class VaultViewModel @Inject constructor(
     //endregion VaultAction Handlers
 }
 
+// TODO: Get data from repository (BIT-205)
+private val accountSummaries = persistentListOf(
+    AccountSummary(
+        userId = "lockedUserId",
+        name = "Locked User",
+        email = "locked@bitwarden.com",
+        avatarColorHex = "#00aaaa",
+        status = AccountSummary.Status.LOCKED,
+    ),
+    AccountSummary(
+        userId = "activeUserId",
+        name = "Active User",
+        email = "active@bitwarden.com",
+        avatarColorHex = "#aa00aa",
+        status = AccountSummary.Status.ACTIVE,
+    ),
+    AccountSummary(
+        userId = "unlockedUserId",
+        name = "Unlocked User",
+        email = "unlocked@bitwarden.com",
+        avatarColorHex = "#aaaa00",
+        status = AccountSummary.Status.UNLOCKED,
+    ),
+)
+
+private val activeAccountSummary = accountSummaries
+    .first { it.status == AccountSummary.Status.ACTIVE }
+
 /**
  * Represents the overall state for the [VaultScreen].
  *
@@ -135,6 +192,7 @@ class VaultViewModel @Inject constructor(
 data class VaultState(
     private val avatarColorString: String,
     val initials: String,
+    val accountSummaries: List<AccountSummary>,
     val viewState: ViewState,
 ) : Parcelable {
 
@@ -359,6 +417,21 @@ sealed class VaultEvent {
      * Navigate to the secure notes group screen.
      */
     data object NavigateToSecureNotesGroup : VaultEvent()
+
+    /**
+     * Navigate to the login flow for an additional account.
+     */
+    data object NavigateToLoginScreen : VaultEvent()
+
+    /**
+     * Navigate to the vault unlock screen.
+     */
+    data object NavigateToVaultUnlockScreen : VaultEvent()
+
+    /**
+     * Show a toast with the given [message].
+     */
+    data class ShowToast(val message: String) : VaultEvent()
 }
 
 /**
@@ -376,6 +449,18 @@ sealed class VaultAction {
      */
     data object SearchIconClick : VaultAction()
 
+    /**
+     * User clicked an account in the account switcher.
+     */
+    data class AccountSwitchClick(
+        val accountSummary: AccountSummary,
+    ) : VaultAction()
+
+    /**
+     * User clicked on Add Account in the account switcher.
+     */
+    data object AddAccountClick : VaultAction()
+
     /**
      * Action to trigger when a specific vault item is clicked.
      */

app/src/main/java/com/x8bit/bitwarden/ui/vault/feature/vault/util/AccountSummaryExtensions.kt

@@ -0,0 +1,43 @@
+package com.x8bit.bitwarden.ui.vault.feature.vault.util
+
+import androidx.annotation.DrawableRes
+import androidx.annotation.StringRes
+import com.x8bit.bitwarden.R
+import com.x8bit.bitwarden.data.auth.repository.model.AccountSummary
+
+/**
+ * Given the [AccountSummary], returns the first two "initials" found when looking at the
+ * [AccountSummary.name].
+ *
+ * Ex:
+ * - "First Last" -> "FL"
+ * - "First Second Last" -> "FS"
+ */
+val AccountSummary.initials: String
+    get() = this
+        .name
+        .split(" ")
+        .take(2)
+        .joinToString(separator = "") { it.first().toString() }
+
+/**
+ * Drawable resource to display for the given [AccountSummary].
+ */
+@get:DrawableRes
+val AccountSummary.iconRes: Int
+    get() = when (this.status) {
+        AccountSummary.Status.ACTIVE -> R.drawable.ic_check_mark
+        AccountSummary.Status.LOCKED -> R.drawable.ic_locked
+        AccountSummary.Status.UNLOCKED -> R.drawable.ic_unlocked
+    }
+
+/**
+ * String resource of a supporting text to display (or `null`) for the given [AccountSummary].
+ */
+@get:StringRes
+val AccountSummary.supportingTextResOrNull: Int?
+    get() = when (this.status) {
+        AccountSummary.Status.ACTIVE -> null
+        AccountSummary.Status.LOCKED -> R.string.account_locked
+        AccountSummary.Status.UNLOCKED -> R.string.account_unlocked
+    }

app/src/main/res/drawable/ic_locked.xml

@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="16dp"
+    android:height="16dp"
+    android:viewportWidth="16"
+    android:viewportHeight="16">
+  <path
+      android:pathData="M8,11.809C8.153,11.672 8.25,11.472 8.25,11.25C8.25,10.836 7.914,10.5 7.5,10.5C7.086,10.5 6.75,10.836 6.75,11.25C6.75,11.472 6.847,11.672 7,11.809V13.5C7,13.776 7.224,14 7.5,14C7.776,14 8,13.776 8,13.5V11.809Z"
+      android:fillColor="#ffffff"/>
+  <path
+      android:pathData="M3,5L3,4.5C3,2.015 5.015,0 7.5,0C9.985,0 12,2.015 12,4.5V5H12.5C13.328,5 14,5.672 14,6.5V14.5C14,15.328 13.328,16 12.5,16H2.5C1.672,16 1,15.328 1,14.5V6.5C1,5.672 1.672,5 2.5,5H3ZM7.5,1C9.433,1 11,2.567 11,4.5V5H4L4,4.5C4,2.567 5.567,1 7.5,1ZM2.5,6C2.224,6 2,6.224 2,6.5V14.5C2,14.776 2.224,15 2.5,15H12.5C12.776,15 13,14.776 13,14.5V6.5C13,6.224 12.776,6 12.5,6H2.5Z"
+      android:fillColor="#ffffff"
+      android:fillType="evenOdd"/>
+</vector>

app/src/main/res/drawable/ic_unlocked.xml

@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="16dp"
+    android:height="16dp"
+    android:viewportWidth="16"
+    android:viewportHeight="16">
+  <path
+      android:pathData="M8,11.809C8.153,11.672 8.25,11.472 8.25,11.25C8.25,10.836 7.914,10.5 7.5,10.5C7.086,10.5 6.75,10.836 6.75,11.25C6.75,11.472 6.847,11.672 7,11.809V13.5C7,13.776 7.224,14 7.5,14C7.776,14 8,13.776 8,13.5V11.809Z"
+      android:fillColor="#ffffff"/>
+  <path
+      android:pathData="M3.936,6C3.054,4.449 3.617,2.428 5.244,1.489C6.877,0.546 8.918,1.076 9.815,2.63L10.444,3.719C10.582,3.959 10.888,4.041 11.127,3.902C11.366,3.764 11.448,3.459 11.31,3.219L10.681,2.13C9.494,0.074 6.83,-0.582 4.744,0.623C2.829,1.728 2.028,4.038 2.826,6H2.5C1.672,6 1,6.672 1,7.5V14.5C1,15.328 1.672,16 2.5,16H12.5C13.328,16 14,15.328 14,14.5V7.5C14,6.672 13.328,6 12.5,6H3.936ZM2,7.5C2,7.224 2.224,7 2.5,7H12.5C12.776,7 13,7.224 13,7.5V14.5C13,14.776 12.776,15 12.5,15H2.5C2.224,15 2,14.776 2,14.5V7.5Z"
+      android:fillColor="#ffffff"
+      android:fillType="evenOdd"/>
+</vector>

app/src/test/java/com/x8bit/bitwarden/ui/vault/feature/vault/VaultScreenTest.kt

@@ -1,5 +1,6 @@
 package com.x8bit.bitwarden.ui.vault.feature.vault
 
+import androidx.compose.ui.test.assertIsDisplayed
 import androidx.compose.ui.test.assertTextEquals
 import androidx.compose.ui.test.filterToOne
 import androidx.compose.ui.test.hasClickAction
@@ -9,14 +10,17 @@ import androidx.compose.ui.test.onNodeWithContentDescription
 import androidx.compose.ui.test.onNodeWithText
 import androidx.compose.ui.test.performClick
 import androidx.compose.ui.test.performScrollToNode
+import com.x8bit.bitwarden.data.auth.repository.model.AccountSummary
 import com.x8bit.bitwarden.ui.platform.base.BaseComposeTest
 import com.x8bit.bitwarden.ui.platform.base.util.asText
 import io.mockk.every
 import io.mockk.mockk
 import io.mockk.verify
+import kotlinx.collections.immutable.persistentListOf
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.update
+import org.junit.Assert.assertFalse
 import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.Test
@@ -24,6 +28,7 @@ import org.junit.Test
 class VaultScreenTest : BaseComposeTest() {
 
     private var onNavigateToVaultAddItemScreenCalled = false
+    private var onDimBottomNavBarRequestCalled = false
 
     private val mutableEventFlow = MutableSharedFlow<VaultEvent>(
         extraBufferCapacity = Int.MAX_VALUE,
@@ -40,10 +45,49 @@ class VaultScreenTest : BaseComposeTest() {
             VaultScreen(
                 viewModel = viewModel,
                 onNavigateToVaultAddItemScreen = { onNavigateToVaultAddItemScreenCalled = true },
+                onDimBottomNavBarRequest = { onDimBottomNavBarRequestCalled = true },
             )
         }
     }
 
+    @Suppress("MaxLineLength")
+    @Test
+    fun `account icon click should show the account switcher and trigger the nav bar dim request`() {
+        composeTestRule.onNodeWithText("active@bitwarden.com").assertDoesNotExist()
+        composeTestRule.onNodeWithText("locked@bitwarden.com").assertDoesNotExist()
+        composeTestRule.onNodeWithText("Add account").assertDoesNotExist()
+        assertFalse(onDimBottomNavBarRequestCalled)
+
+        composeTestRule.onNodeWithText("AU").performClick()
+
+        composeTestRule.onNodeWithText("active@bitwarden.com").assertIsDisplayed()
+        composeTestRule.onNodeWithText("locked@bitwarden.com").assertIsDisplayed()
+        composeTestRule.onNodeWithText("Add account").assertIsDisplayed()
+        assertTrue(onDimBottomNavBarRequestCalled)
+    }
+
+    @Suppress("MaxLineLength")
+    @Test
+    fun `account click in the account switcher should send AccountSwitchClick and close switcher`() {
+        // Open the Account Switcher
+        composeTestRule.onNodeWithText("AU").performClick()
+
+        composeTestRule.onNodeWithText("locked@bitwarden.com").performClick()
+        verify { viewModel.trySendAction(VaultAction.AccountSwitchClick(LOCKED_ACCOUNT_SUMMARY)) }
+        composeTestRule.onNodeWithText("locked@bitwarden.com").assertDoesNotExist()
+    }
+
+    @Suppress("MaxLineLength")
+    @Test
+    fun `Add Account click in the account switcher should send AddAccountClick and close switcher`() {
+        // Open the Account Switcher
+        composeTestRule.onNodeWithText("AU").performClick()
+
+        composeTestRule.onNodeWithText("Add account").performClick()
+        verify { viewModel.trySendAction(VaultAction.AddAccountClick) }
+        composeTestRule.onNodeWithText("Add account").assertDoesNotExist()
+    }
+
     @Test
     fun `search icon click should send SearchIconClick action`() {
         mutableStateFlow.update { it.copy(viewState = VaultState.ViewState.NoItems) }
@@ -357,9 +401,29 @@ class VaultScreenTest : BaseComposeTest() {
     }
 }
 
+private val ACTIVE_ACCOUNT_SUMMARY = AccountSummary(
+    userId = "activeUserId",
+    name = "Active User",
+    email = "active@bitwarden.com",
+    avatarColorHex = "#aa00aa",
+    status = AccountSummary.Status.ACTIVE,
+)
+
+private val LOCKED_ACCOUNT_SUMMARY = AccountSummary(
+    userId = "lockedUserId",
+    name = "Locked User",
+    email = "locked@bitwarden.com",
+    avatarColorHex = "#00aaaa",
+    status = AccountSummary.Status.LOCKED,
+)
+
 private val DEFAULT_STATE: VaultState = VaultState(
-    avatarColorString = "FF0000FF",
+    avatarColorString = "#aa00aa",
-    initials = "BW",
+    initials = "AU",
+    accountSummaries = persistentListOf(
+        ACTIVE_ACCOUNT_SUMMARY,
+        LOCKED_ACCOUNT_SUMMARY,
+    ),
     viewState = VaultState.ViewState.Loading,
 )
 

app/src/test/java/com/x8bit/bitwarden/ui/vault/feature/vault/VaultViewModelTest.kt

@@ -2,6 +2,7 @@ package com.x8bit.bitwarden.ui.vault.feature.vault
 
 import androidx.lifecycle.SavedStateHandle
 import app.cash.turbine.test
+import com.x8bit.bitwarden.data.auth.repository.model.AccountSummary
 import com.x8bit.bitwarden.ui.platform.base.BaseViewModelTest
 import io.mockk.every
 import io.mockk.mockk
@@ -27,6 +28,58 @@ class VaultViewModelTest : BaseViewModelTest() {
         assertEquals(state, viewModel.stateFlow.value)
     }
 
+    @Test
+    fun `on AccountSwitchClick for the active account should do nothing`() = runTest {
+        val viewModel = createViewModel()
+        viewModel.eventFlow.test {
+            VaultAction.AccountSwitchClick(
+                accountSummary = mockk {
+                    every { status } returns AccountSummary.Status.ACTIVE
+                },
+            )
+            expectNoEvents()
+        }
+    }
+
+    @Test
+    fun `on AccountSwitchClick for a locked account emit NavigateToVaultUnlockScreen`() = runTest {
+        val viewModel = createViewModel()
+        viewModel.eventFlow.test {
+            viewModel.trySendAction(
+                VaultAction.AccountSwitchClick(
+                    accountSummary = mockk {
+                        every { status } returns AccountSummary.Status.LOCKED
+                    },
+                ),
+            )
+            assertEquals(VaultEvent.NavigateToVaultUnlockScreen, awaitItem())
+        }
+    }
+
+    @Test
+    fun `on AccountSwitchClick for an unlocked account emit ShowToast`() = runTest {
+        val viewModel = createViewModel()
+        viewModel.eventFlow.test {
+            viewModel.trySendAction(
+                VaultAction.AccountSwitchClick(
+                    accountSummary = mockk {
+                        every { status } returns AccountSummary.Status.UNLOCKED
+                    },
+                ),
+            )
+            assertEquals(VaultEvent.ShowToast("Not yet implemented."), awaitItem())
+        }
+    }
+
+    @Test
+    fun `on AddAccountClick should emit NavigateToLoginScreen`() = runTest {
+        val viewModel = createViewModel()
+        viewModel.eventFlow.test {
+            viewModel.trySendAction(VaultAction.AddAccountClick)
+            assertEquals(VaultEvent.NavigateToLoginScreen, awaitItem())
+        }
+    }
+
     @Test
     fun `AddItemClick should emit NavigateToAddItemScreen`() = runTest {
         val viewModel = createViewModel()
@@ -126,5 +179,6 @@ class VaultViewModelTest : BaseViewModelTest() {
 private val DEFAULT_STATE: VaultState = VaultState(
     avatarColorString = "FF0000FF",
     initials = "BW",
+    accountSummaries = emptyList(),
     viewState = VaultState.ViewState.Loading,
 )

app/src/test/java/com/x8bit/bitwarden/ui/vault/feature/vault/util/AccountSummaryExtensionsTest.kt

@@ -0,0 +1,88 @@
+package com.x8bit.bitwarden.ui.vault.feature.vault.util
+
+import com.x8bit.bitwarden.R
+import com.x8bit.bitwarden.data.auth.repository.model.AccountSummary
+import io.mockk.every
+import io.mockk.mockk
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertNull
+import org.junit.jupiter.api.Test
+
+class AccountSummaryExtensionsTest {
+
+    @Test
+    fun `initials should return the starting letters of the first two words in the name`() {
+        assertEquals(
+            "FS",
+            mockk<AccountSummary>() {
+                every { name } returns "First Second Third"
+            }
+                .initials,
+        )
+    }
+
+    @Test
+    fun `iconRes returns a checkmark for active accounts`() {
+        assertEquals(
+            R.drawable.ic_check_mark,
+            mockk<AccountSummary>() {
+                every { status } returns AccountSummary.Status.ACTIVE
+            }
+                .iconRes,
+        )
+    }
+
+    @Test
+    fun `iconRes returns a locked lock for locked accounts`() {
+        assertEquals(
+            R.drawable.ic_locked,
+            mockk<AccountSummary>() {
+                every { status } returns AccountSummary.Status.LOCKED
+            }
+                .iconRes,
+        )
+    }
+
+    @Test
+    fun `iconRes returns an unlocked lock for unlocked accounts`() {
+        assertEquals(
+            R.drawable.ic_unlocked,
+            mockk<AccountSummary>() {
+                every { status } returns AccountSummary.Status.UNLOCKED
+            }
+                .iconRes,
+        )
+    }
+
+    @Test
+    fun `supportingTextResOrNull returns a null for active accounts`() {
+        assertNull(
+            mockk<AccountSummary>() {
+                every { status } returns AccountSummary.Status.ACTIVE
+            }
+                .supportingTextResOrNull,
+        )
+    }
+
+    @Test
+    fun `supportingTextResOrNull returns Locked locked accounts`() {
+        assertEquals(
+            R.string.account_locked,
+            mockk<AccountSummary>() {
+                every { status } returns AccountSummary.Status.LOCKED
+            }
+                .supportingTextResOrNull,
+        )
+    }
+
+    @Test
+    fun `supportingTextResOrNull returns Unlocked for unlocked accounts`() {
+        assertEquals(
+            R.string.account_unlocked,
+            mockk<AccountSummary>() {
+                every { status } returns AccountSummary.Status.UNLOCKED
+            }
+                .supportingTextResOrNull,
+        )
+    }
+}