fix: group messages date | design changes (WPB-1733)

app/src/main/kotlin/com/wire/android/ui/home/conversations/ConversationScreen.kt

@@ -1061,11 +1061,12 @@ fun MessageList(
 
                     if (index > 0) {
                         val previousMessage = lazyPagingMessages[index - 1] ?: message
+                        val shouldDisplayDateTimeDivider = message.header.messageTime.shouldDisplayDatesDifferenceDivider(
+                            previousDate = previousMessage.header.messageTime.utcISO
+                        )
 
-                        val currentGroup = message.header.messageTime.getFormattedDateGroup(now = currentTime)
-                        val previousGroup = previousMessage.header.messageTime.getFormattedDateGroup(now = currentTime)
-
-                        if (currentGroup != previousGroup) {
+                        if (shouldDisplayDateTimeDivider) {
+                            val previousGroup = previousMessage.header.messageTime.getFormattedDateGroup(now = currentTime)
                             previousMessage.header.messageTime.utcISO.serverDate()?.let { serverDate ->
                                 MessageGroupDateTime(
                                     messageDateTime = serverDate,
@@ -1110,6 +1111,19 @@ fun MessageList(
                         isSelectedMessage = (message.header.messageId == selectedMessageId),
                         isInteractionAvailable = interactionAvailability == InteractionAvailability.ENABLED
                     )
+
+                    val isTheOnlyItem = index == 0 && lazyPagingMessages.itemCount == 1
+                    val isTheLastItem = (index + 1) == lazyPagingMessages.itemCount
+                    if (isTheOnlyItem || isTheLastItem) {
+                        val currentGroup = message.header.messageTime.getFormattedDateGroup(now = currentTime)
+                        message.header.messageTime.utcISO.serverDate()?.let { serverDate ->
+                            MessageGroupDateTime(
+                                messageDateTime = serverDate,
+                                messageDateTimeGroup = currentGroup,
+                                now = currentTime
+                            )
+                        }
+                    }
                 }
             }
             JumpToLastMessageButton(lazyListState = lazyListState)
@@ -1178,6 +1192,10 @@ private fun MessageGroupDateTime(
     Row(
         Modifier
             .fillMaxWidth()
+            .padding(
+                top = dimensions().spacing4x,
+                bottom = dimensions().spacing8x
+            )
             .background(color = colorsScheme().divider)
             .padding(
                 top = dimensions().spacing6x,

app/src/main/kotlin/com/wire/android/ui/home/conversations/model/UIMessage.kt

@@ -33,6 +33,7 @@ import com.wire.android.ui.theme.Accent
 import com.wire.android.util.Copyable
 import com.wire.android.util.MessageDateTimeGroup
 import com.wire.android.util.groupedUIMessageDateTime
+import com.wire.android.util.shouldDisplayDatesDifferenceDivider
 import com.wire.android.util.ui.LocalizedStringResource
 import com.wire.android.util.ui.UIText
 import com.wire.android.util.uiMessageDateTime
@@ -626,6 +627,8 @@ enum class MessageSource {
 data class MessageTime(val utcISO: String) {
     val formattedDate: String = utcISO.uiMessageDateTime() ?: ""
     fun getFormattedDateGroup(now: Long): MessageDateTimeGroup? = utcISO.groupedUIMessageDateTime(now = now)
+    fun shouldDisplayDatesDifferenceDivider(previousDate: String): Boolean =
+        utcISO.shouldDisplayDatesDifferenceDivider(previousDate = previousDate)
 }
 
 @Stable

app/src/main/kotlin/com/wire/android/util/DateTimeUtil.kt

@@ -20,14 +20,14 @@
 
 package com.wire.android.util
 
-import android.text.format.DateUtils
 import com.wire.android.appLogger
 import kotlinx.datetime.Instant
 import java.text.DateFormat
 import java.text.ParseException
 import java.text.SimpleDateFormat
 import java.time.LocalDate
 import java.time.ZoneId
+import java.time.temporal.ChronoUnit
 import java.util.Calendar
 import java.util.Date
 import java.util.Locale
@@ -43,16 +43,15 @@ private val longDateShortTimeFormat = DateFormat
     .getDateTimeInstance(DateFormat.LONG, DateFormat.SHORT)
 private val mediumOnlyDateTimeFormat = DateFormat
     .getDateInstance(DateFormat.MEDIUM)
-val messageTimeFormatter = DateFormat
+private val messageTimeFormatter = DateFormat
     .getTimeInstance(DateFormat.SHORT)
     .apply { timeZone = TimeZone.getDefault() }
-private val messageDateTimeFormatter = DateFormat
-    .getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT)
-    .apply { timeZone = TimeZone.getDefault() }
 private const val ONE_MINUTE_FROM_MILLIS = 60 * 1000
 private const val THIRTY_MINUTES = 30
 private const val ONE_WEEK_IN_DAYS = 7
 private const val ONE_DAY = 1
+private const val FORTY_FIVE_MINUTES_DIFFERENCE = 45
+private const val MINIMUM_DAYS_DIFFERENCE = 1
 
 private val readReceiptDateTimeFormat = SimpleDateFormat(
     "MMM dd yyyy,  hh:mm a",
@@ -181,12 +180,28 @@ sealed interface MessageDateTimeGroup {
 
 fun String.uiMessageDateTime(): String? = this
     .serverDate()?.let { serverDate ->
-        when (DateUtils.isToday(serverDate.time)) {
-            true -> messageTimeFormatter.format(serverDate)
-            false -> messageDateTimeFormatter.format(serverDate)
-        }
+        messageTimeFormatter.format(serverDate)
     }
 
+fun String.shouldDisplayDatesDifferenceDivider(previousDate: String): Boolean {
+    val currentDate = this@shouldDisplayDatesDifferenceDivider
+
+    val currentLocalDateTime = currentDate.serverDate()?.toInstant()?.atZone(ZoneId.systemDefault())?.toLocalDateTime()
+    val previousLocalDateTime = previousDate.serverDate()?.toInstant()?.atZone(ZoneId.systemDefault())?.toLocalDateTime()
+
+    val differenceInMinutes = ChronoUnit.MINUTES.between(
+        currentLocalDateTime,
+        previousLocalDateTime
+    )
+
+    val differenceInDays = ChronoUnit.DAYS.between(
+        currentLocalDateTime,
+        previousLocalDateTime
+    )
+
+    return differenceInMinutes > FORTY_FIVE_MINUTES_DIFFERENCE || differenceInDays >= MINIMUM_DAYS_DIFFERENCE
+}
+
 fun String.groupedUIMessageDateTime(now: Long): MessageDateTimeGroup? = this
     .serverDate()?.let { serverDate ->
         val localDate = serverDate.toInstant().atZone(ZoneId.systemDefault()).toLocalDate()