✨ [TimetableItemDetailScreen] I added a UI to display a message in the event of cancellation.

core/data/src/commonMain/kotlin/io/github/droidkaigi/confsched/data/sessions/FakeSessionsApiClient.kt

@@ -6,6 +6,7 @@ import io.github.droidkaigi.confsched.data.sessions.response.CategoryResponse
 import io.github.droidkaigi.confsched.data.sessions.response.LocaledResponse
 import io.github.droidkaigi.confsched.data.sessions.response.RoomResponse
 import io.github.droidkaigi.confsched.data.sessions.response.SessionAssetResponse
+import io.github.droidkaigi.confsched.data.sessions.response.SessionMessageResponse
 import io.github.droidkaigi.confsched.data.sessions.response.SessionResponse
 import io.github.droidkaigi.confsched.data.sessions.response.SessionsAllResponse
 import io.github.droidkaigi.confsched.data.sessions.response.SpeakerResponse
@@ -48,6 +49,12 @@ public class FakeSessionsApiClient : SessionsApiClient {
             }
         }
 
+        public data object OperationalMessageExists : Status() {
+            override suspend fun sessionsAllResponse(): SessionsAllResponse {
+                return SessionsAllResponse.messageExistsFake()
+            }
+        }
+
         public data object Error : Status() {
             override suspend fun sessionsAllResponse(): SessionsAllResponse {
                 throw IOException("Fake IO Exception")
@@ -126,6 +133,17 @@ public fun SessionsAllResponse.Companion.onlyVideoAssetAvailableFake(): Sessions
     ),
 )
 
+public fun SessionsAllResponse.Companion.messageExistsFake(): SessionsAllResponse = SessionsAllResponse.fake(
+    sessions = SessionResponse.fakes(
+        message = SessionMessageResponse.fake(),
+    ),
+)
+
+public fun SessionMessageResponse.Companion.fake(): SessionMessageResponse = SessionMessageResponse(
+    ja = "このセッションは中止になりました",
+    en = "This session has been canceled.",
+)
+
 private fun RoomResponse.Companion.fakes(): List<RoomResponse> = listOf(
     RoomResponse(name = LocaledResponse(ja = "Hedgehog ja", en = "Hedgehog"), id = 1, sort = 1),
     RoomResponse(
@@ -180,6 +198,7 @@ private fun SessionResponse.Companion.fakes(
     rooms: List<RoomResponse> = RoomResponse.fakes(),
     categories: List<CategoryResponse> = CategoryResponse.fakes(),
     asset: SessionAssetResponse = SessionAssetResponse.fake(),
+    message: SessionMessageResponse? = null,
 ): List<SessionResponse> {
     val sessions = mutableListOf<SessionResponse>()
 
@@ -204,7 +223,7 @@ private fun SessionResponse.Companion.fakes(
                 sessionCategoryItemId = 3,
                 interpretationTarget = false,
                 asset = asset,
-                message = null,
+                message = message,
                 sessionType = "WELCOME_TALK",
                 levels = listOf("UNSPECIFIED"),
             ),
@@ -266,7 +285,7 @@ private fun SessionResponse.Companion.fakes(
                     roomId = room.id,
                     sessionCategoryItemId = sessionCategoryItemId,
                     sessionType = "NORMAL",
-                    message = null,
+                    message = message,
                     isPlenumSession = false,
                     targetAudience = "For App developer アプリ開発者向け",
                     interpretationTarget = false,

core/testing/src/main/java/io/github/droidkaigi/confsched/testing/robot/MiniRobots.kt

@@ -43,6 +43,7 @@ import io.github.droidkaigi.confsched.testing.robot.TimetableItemCardRobot.Langu
 import io.github.droidkaigi.confsched.testing.robot.TimetableServerRobot.ServerStatus.Error
 import io.github.droidkaigi.confsched.testing.robot.TimetableServerRobot.ServerStatus.Operational
 import io.github.droidkaigi.confsched.testing.robot.TimetableServerRobot.ServerStatus.OperationalBothAssetAvailable
+import io.github.droidkaigi.confsched.testing.robot.TimetableServerRobot.ServerStatus.OperationalMessageExists
 import io.github.droidkaigi.confsched.testing.robot.TimetableServerRobot.ServerStatus.OperationalOnlySlideAssetAvailable
 import io.github.droidkaigi.confsched.testing.robot.TimetableServerRobot.ServerStatus.OperationalOnlyVideoAssetAvailable
 import io.github.droidkaigi.confsched.testing.rules.RobotTestRule
@@ -333,6 +334,7 @@ interface TimetableServerRobot {
         OperationalBothAssetAvailable,
         OperationalOnlySlideAssetAvailable,
         OperationalOnlyVideoAssetAvailable,
+        OperationalMessageExists,
         Error,
     }
 
@@ -349,6 +351,7 @@ class DefaultTimetableServerRobot @Inject constructor(sessionsApiClient: Session
                 OperationalBothAssetAvailable -> Status.OperationalBothAssetAvailable
                 OperationalOnlySlideAssetAvailable -> Status.OperationalOnlySlideAssetAvailable
                 OperationalOnlyVideoAssetAvailable -> Status.OperationalOnlyVideoAssetAvailable
+                OperationalMessageExists -> Status.OperationalMessageExists
                 Error -> Status.Error
             },
         )

core/testing/src/main/java/io/github/droidkaigi/confsched/testing/robot/TimetableItemDetailScreenRobot.kt

@@ -22,6 +22,8 @@ import com.github.takahirom.roborazzi.captureRoboImage
 import io.github.droidkaigi.confsched.data.sessions.FakeSessionsApiClient
 import io.github.droidkaigi.confsched.designsystem.theme.KaigiTheme
 import io.github.droidkaigi.confsched.sessions.TimetableItemDetailBookmarkIconTestTag
+import io.github.droidkaigi.confsched.sessions.TimetableItemDetailMessageRowTestTag
+import io.github.droidkaigi.confsched.sessions.TimetableItemDetailMessageRowTextTestTag
 import io.github.droidkaigi.confsched.sessions.TimetableItemDetailScreen
 import io.github.droidkaigi.confsched.sessions.TimetableItemDetailScreenLazyColumnTestTag
 import io.github.droidkaigi.confsched.sessions.component.DescriptionMoreButtonTestTag
@@ -118,6 +120,18 @@ class TimetableItemDetailScreenRobot @Inject constructor(
             .performScrollToNode(hasTestTag(TimetableItemDetailContentArchiveSectionTestTag))
     }
 
+    fun scrollToMessageRow() {
+        composeTestRule
+            .onNode(hasTestTag(TimetableItemDetailScreenLazyColumnTestTag))
+            .performScrollToNode(hasTestTag(TimetableItemDetailMessageRowTestTag))
+
+        // FIXME Without this, you won't be able to scroll to the exact middle of the message section.
+        composeTestRule.onRoot().performTouchInput {
+            swipeUp(startY = centerY, endY = centerY - 175)
+        }
+        waitUntilIdle()
+    }
+
     fun checkScreenCapture() {
         composeTestRule
             .onNode(isRoot())
@@ -248,6 +262,15 @@ class TimetableItemDetailScreenRobot @Inject constructor(
             .assertDoesNotExist()
     }
 
+    fun checkMessageDisplayed() {
+        composeTestRule
+            .onAllNodes(hasTestTag(TimetableItemDetailMessageRowTextTestTag))
+            .onFirst()
+            .assertExists()
+            .assertIsDisplayed()
+            .assertTextEquals("This session has been canceled.")
+    }
+
     companion object {
         val defaultSessionId = FakeSessionsApiClient.defaultSession.id
     }

feature/sessions/src/androidUnitTest/kotlin/io/github/droidkaigi/confsched/sessions/TimetableItemDetailScreenTest.kt

@@ -214,6 +214,22 @@ class TimetableItemDetailScreenTest(private val testCase: DescribedBehavior<Time
                         }
                     }
                 }
+                describe("when server is operational exists message") {
+                    doIt {
+                        setupTimetableServer(ServerStatus.OperationalMessageExists)
+                    }
+                    describe("when launch") {
+                        doIt {
+                            setupScreenContent()
+                            scrollToMessageRow()
+                        }
+                        itShould("display message") {
+                            captureScreenWithChecks {
+                                checkMessageDisplayed()
+                            }
+                        }
+                    }
+                }
             }
         }
     }

feature/sessions/src/commonMain/kotlin/io/github/droidkaigi/confsched/sessions/TimetableItemDetailScreen.kt

@@ -5,15 +5,24 @@ import androidx.compose.animation.ExperimentalSharedTransitionApi
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
 import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.IntrinsicSize
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Info
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.SnackbarHost
 import androidx.compose.material3.SnackbarHostState
 import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
@@ -25,9 +34,12 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.input.nestedscroll.nestedScroll
 import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
 import androidx.navigation.NavController
 import androidx.navigation.NavGraphBuilder
 import androidx.navigation.compose.composable
+import conference_app_2024.feature.sessions.generated.resources.image
 import io.github.droidkaigi.confsched.compose.EventFlow
 import io.github.droidkaigi.confsched.compose.rememberEventFlow
 import io.github.droidkaigi.confsched.designsystem.component.LoadingText
@@ -42,6 +54,7 @@ import io.github.droidkaigi.confsched.droidkaigiui.compositionlocal.LocalSnackba
 import io.github.droidkaigi.confsched.model.Lang
 import io.github.droidkaigi.confsched.model.TimetableItem
 import io.github.droidkaigi.confsched.model.TimetableItem.Session
+import io.github.droidkaigi.confsched.model.TimetableItem.Special
 import io.github.droidkaigi.confsched.model.TimetableItemId
 import io.github.droidkaigi.confsched.model.fake
 import io.github.droidkaigi.confsched.sessions.TimetableItemDetailScreenUiState.Loaded
@@ -52,11 +65,14 @@ import io.github.droidkaigi.confsched.sessions.component.TimetableItemDetailHead
 import io.github.droidkaigi.confsched.sessions.component.TimetableItemDetailSummaryCard
 import io.github.droidkaigi.confsched.sessions.component.TimetableItemDetailTopAppBar
 import io.github.droidkaigi.confsched.sessions.navigation.TimetableItemDetailDestination
+import org.jetbrains.compose.resources.stringResource
 import org.jetbrains.compose.ui.tooling.preview.Preview
 
 const val timetableItemDetailScreenRouteItemIdParameterName = "timetableItemId"
 const val TimetableItemDetailBookmarkIconTestTag = "TimetableItemDetailBookmarkIconTestTag"
 const val TimetableItemDetailScreenLazyColumnTestTag = "TimetableItemDetailScreenLazyColumnTestTag"
+const val TimetableItemDetailMessageRowTestTag = "TimetableItemDetailMessageRowTestTag"
+const val TimetableItemDetailMessageRowTextTestTag = "TimetableItemDetailMessageRowTextTestTag"
 
 fun NavGraphBuilder.sessionScreens(
     onNavigationIconClick: () -> Unit,
@@ -233,6 +249,41 @@ private fun TimetableItemDetailScreen(
                             )
                         }
 
+                        when (uiState.timetableItem) {
+                            is Session -> uiState.timetableItem.message
+                            is Special -> uiState.timetableItem.message
+                        }?.let {
+                            item {
+                                Row(
+                                    modifier = Modifier
+                                        .padding(
+                                            start = 8.dp,
+                                            top = 24.dp,
+                                            end = 8.dp,
+                                            bottom = 4.dp,
+                                        )
+                                        .height(IntrinsicSize.Min)
+                                        .testTag(TimetableItemDetailMessageRowTestTag),
+                                    horizontalArrangement = Arrangement.spacedBy(12.dp),
+                                ) {
+                                    Icon(
+                                        modifier = Modifier.fillMaxHeight(),
+                                        imageVector = Icons.Filled.Info,
+                                        contentDescription = stringResource(SessionsRes.string.image),
+                                        tint = MaterialTheme.colorScheme.error,
+                                    )
+                                    Text(
+                                        modifier = Modifier.testTag(
+                                            TimetableItemDetailMessageRowTextTestTag,
+                                        ),
+                                        text = it.currentLangTitle,
+                                        fontSize = 16.sp,
+                                        color = MaterialTheme.colorScheme.error,
+                                    )
+                                }
+                            }
+                        }
+
                         item {
                             TimetableItemDetailSummaryCard(
                                 timetableItem = uiState.timetableItem,