MessageListScreen: Add time annotations/max width

.idea/kotlinScripting.xml

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="KotlinScriptingSettings">
-    <scriptDefinition className="org.jetbrains.kotlin.scripting.resolve.KotlinScriptDefinitionFromAnnotatedTemplate" definitionName="KotlinSettingsScript">
-      <order>2147483647</order>
-      <autoReloadConfigurations>true</autoReloadConfigurations>
-    </scriptDefinition>
-  </component>
-</project>

app/src/main/java/net/buzzert/kordophonedroid/ui/messagelist/MessageListScreen.kt

@@ -14,6 +14,7 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.imePadding
 import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.widthIn
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.rememberLazyListState
@@ -39,9 +40,11 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.alpha
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.SolidColor
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.text.input.TextFieldValue
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
@@ -49,6 +52,14 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import net.buzzert.kordophone.backend.model.GUID
 import net.buzzert.kordophone.backend.model.Message
 import net.buzzert.kordophonedroid.ui.theme.KordophoneTopAppBar
+import java.text.SimpleDateFormat
+import java.time.Duration
+import java.time.Instant
+import java.time.LocalDate
+import java.time.Period
+import java.time.format.DateTimeFormatter
+import java.time.format.FormatStyle
+import java.util.Date
 
 private val IncomingChatBubbleShape = RoundedCornerShape(4.dp, 20.dp, 20.dp, 20.dp)
 private val OutgoingChatBubbleShape = RoundedCornerShape(20.dp, 4.dp, 20.dp, 20.dp)
@@ -56,6 +67,7 @@ private val OutgoingChatBubbleShape = RoundedCornerShape(20.dp, 4.dp, 20.dp, 20.
 data class MessageListViewItem(
     val text: String,
     val fromMe: Boolean,
+    val date: Date,
     val delivered: Boolean = true,
 )
 
@@ -79,6 +91,7 @@ fun MessageListScreen(
         MessageListViewItem(
             text = it.text,
             fromMe = it.sender == null,
+            date = it.date,
             delivered = !viewModel.isPendingMessage(it)
         )
     }
@@ -140,14 +153,48 @@ fun Messages(
                 .fillMaxSize()
                 .padding(horizontal = 16.dp)
         ) {
+            var lastDate: Date? = null
+            val dateFormatter = SimpleDateFormat.getDateTimeInstance()
+
             for (index in messages.indices) {
                 val content = messages[index]
+                if (lastDate == null) {
+                    lastDate = content.date
+                }
+
+                val duration = Duration.between(content.date.toInstant(), lastDate.toInstant())
+                lastDate = content.date
+
+                Log.d("MessageListScreen", "period: $duration")
+
+                // Remember: This is upside down.
                 item {
                     MessageBubble(
                         text = content.text,
                         mine = content.fromMe,
-                        modifier = Modifier.alpha(if (!content.delivered) 0.5F else 1.0f)
+                        modifier = Modifier
+                            .alpha(if (!content.delivered) 0.5F else 1.0f)
                     )
+
+                    // Greater than 30 minutes: show date:
+                    if (duration.toMinutes() > 30) {
+                        val formattedDate = dateFormatter.format(content.date)
+                        Text(
+                            text = formattedDate,
+                            textAlign = TextAlign.Center,
+                            style = MaterialTheme.typography.caption.copy(
+                                color = MaterialTheme.colors.onSurface.copy(alpha = 0.4f)
+                            ),
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .padding(18.dp),
+                        )
+                    }
+
+                    // Greater than five minutes: add a bit of space.
+                    else if (duration.toMinutes() > 5) {
+                        Spacer(modifier = Modifier.height(12.dp))
+                    }
                 }
             }
         }
@@ -163,8 +210,11 @@ fun MessageBubble(
     val backgroundBubbleColor = if (mine) MaterialTheme.colors.primary else MaterialTheme.colors.secondary
 
     Column() {
+        Row(modifier = modifier.fillMaxWidth()) {
+            if (mine) { Spacer(modifier = Modifier.weight(1f)) }
+
             Row(
-            modifier = modifier.fillMaxWidth(),
+                modifier = Modifier.fillMaxWidth(0.8f),
                 horizontalArrangement = if (mine) Arrangement.End else Arrangement.Start,
             ) {
                 Surface(
@@ -180,6 +230,9 @@ fun MessageBubble(
                 }
             }
 
+            if (!mine) { Spacer(modifier = Modifier.weight(1f)) }
+        }
+
         Spacer(modifier = Modifier.height(4.dp))
     }
 }
@@ -190,9 +243,9 @@ fun MessageBubble(
 @Composable
 private fun MessageListScreenPreview() {
     val messages = listOf<MessageListViewItem>(
-        MessageListViewItem(text = "Hello", fromMe = false),
+        MessageListViewItem(text = "Hello", fromMe = false, date = Date()),
-        MessageListViewItem(text = "Hey there", fromMe = true),
+        MessageListViewItem(text = "Hey there, this is a longer text message that might wrap to another line", fromMe = true, date = Date()),
-        MessageListViewItem(text = "How's it going", fromMe = true, delivered = false)
+        MessageListViewItem(text = "How's it going", fromMe = true, delivered = false, date = Date())
     ).reversed()
 
     Scaffold() {