show message timestamp

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

@@ -7,12 +7,16 @@ import android.speech.RecognizerIntent
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.animation.AnimatedContent
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.expandVertically
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
 import androidx.compose.animation.scaleIn
 import androidx.compose.animation.scaleOut
+import androidx.compose.animation.shrinkVertically
 import androidx.compose.animation.togetherWith
 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
@@ -97,6 +101,7 @@ import su.reya.coop.Room
 import su.reya.coop.Screen
 import su.reya.coop.extractUrls
 import su.reya.coop.formatAsGroupHeader
+import su.reya.coop.formatAsTime
 import su.reya.coop.humanReadable
 import su.reya.coop.isImageUrl
 import su.reya.coop.rememberUiState
@@ -554,6 +559,9 @@ fun ChatMessage(
     val content = rumor.content()
     val images = remember(content) { content.extractUrls().filter { it.isImageUrl() } }
     val cleanedContent = remember(content) { content.removeImageUrls() }
+    val timestamp = remember(rumor) { rumor.createdAt().formatAsTime() }
+
+    var isMessageClicked by remember { mutableStateOf(false) }
 
     val bubbleShape = if (isMine) {
         RoundedCornerShape(topStart = 20.dp, topEnd = 4.dp, bottomStart = 20.dp, bottomEnd = 20.dp)
@@ -574,6 +582,12 @@ fun ChatMessage(
         contentAlignment = if (isMine) Alignment.CenterEnd else Alignment.CenterStart
     ) {
         Column(
+            modifier = Modifier.clickable(
+                interactionSource = remember { MutableInteractionSource() },
+                indication = null
+            ) {
+                isMessageClicked = !isMessageClicked
+            },
             horizontalAlignment = if (isMine) Alignment.End else Alignment.Start,
             verticalArrangement = Arrangement.spacedBy(8.dp)
         ) {
@@ -607,6 +621,20 @@ fun ChatMessage(
                     )
                 }
             }
+            AnimatedVisibility(
+                visible = isMessageClicked,
+                enter = fadeIn() + expandVertically(),
+                exit = fadeOut() + shrinkVertically()
+            ) {
+                Text(
+                    text = timestamp,
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.outline,
+                    modifier = Modifier.align(
+                        if (isMine) Alignment.End else Alignment.Start
+                    )
+                )
+            }
         }
     }
 }

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

@@ -153,21 +153,25 @@ fun UnsignedEvent.roomId(): Long {
     return sortedUniqueKeys.hashCode().toLong()
 }
 
-fun Timestamp.ago(): String {
-    val SECONDS_IN_MINUTE = 60L
-    val MINUTES_IN_HOUR = 60L
-    val HOURS_IN_DAY = 24L
-    val DAYS_IN_MONTH = 30L
+fun Timestamp.formatAsTime(): String {
+    val timeZone = TimeZone.currentSystemDefault()
+    val inputInstant = Instant.fromEpochSeconds(this.asSecs().toLong())
+    val inputDateTime = inputInstant.toLocalDateTime(timeZone)
+    val hour = inputDateTime.hour.toString().padStart(2, '0')
+    val minute = inputDateTime.minute.toString().padStart(2, '0')
+    return "$hour:$minute"
+}
 
+fun Timestamp.ago(): String {
     val inputInstant = Instant.fromEpochSeconds(this.asSecs().toLong())
     val now = Clock.System.now()
     val duration = now - inputInstant
 
     return when {
-        duration.inWholeSeconds < SECONDS_IN_MINUTE -> "Now"
-        duration.inWholeMinutes < MINUTES_IN_HOUR -> "${duration.inWholeMinutes}m"
-        duration.inWholeHours < HOURS_IN_DAY -> "${duration.inWholeHours}h"
-        duration.inWholeDays < DAYS_IN_MONTH -> "${duration.inWholeDays}d"
+        duration.inWholeSeconds < 60L -> "Now"
+        duration.inWholeMinutes < 60L -> "${duration.inWholeMinutes}m"
+        duration.inWholeHours < 24L -> "${duration.inWholeHours}h"
+        duration.inWholeDays < 30L -> "${duration.inWholeDays}d"
         else -> {
             val localDateTime = inputInstant.toLocalDateTime(TimeZone.currentSystemDefault())
             val month =