app: MessageEntry: Adds UI support for uploading attachments

Still need backend support to finish this.

app/src/debug/kotlin/previews/Previews.kt

@@ -11,12 +11,14 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.tooling.preview.Preview
 import net.buzzert.kordophonedroid.R
 import net.buzzert.kordophonedroid.ui.conversationlist.ConversationListItem
 import net.buzzert.kordophonedroid.ui.conversationlist.ConversationListScreen
 import net.buzzert.kordophonedroid.ui.conversationlist.NoContentView
+import net.buzzert.kordophonedroid.ui.messagelist.AttachmentRowItem
 import net.buzzert.kordophonedroid.ui.messagelist.MessageEntry
 import net.buzzert.kordophonedroid.ui.messagelist.MessageListItem
 import net.buzzert.kordophonedroid.ui.messagelist.MessageMetadata
@@ -77,11 +79,19 @@ private fun MessageListScreenPreview() {
     ).reversed()
 
     Scaffold() {
-        MessageTranscript(messages = messages, paddingValues = it, showSenders = true, onSendMessage = {})
+        MessageTranscript(
+            messages = messages,
+            paddingValues = it,
+            showSenders = true,
+            attachmentUris = setOf(),
+            onAddAttachment = {},
+            onClearAttachments = {},
+            onSendMessage = {}
+        )
     }
 }
 
-@Preview
+@Preview(showBackground = true)
 @Composable
 private fun MessageEntryPreview() {
     var textState by rememberSaveable(stateSaver = TextFieldValue.Saver) {
@@ -91,6 +101,18 @@ private fun MessageEntryPreview() {
     MessageEntry(onSend = {}, onTextChanged = {}, textFieldValue = textState)
 }
 
+@Preview(showBackground = true)
+@Composable
+private fun MessageEntryWithAttachmentsPreview() {
+    var textState by rememberSaveable(stateSaver = TextFieldValue.Saver) {
+        mutableStateOf(TextFieldValue("Attachments"))
+    }
+
+    MessageEntry(onSend = {}, onTextChanged = {}, textFieldValue = textState, attachmentItems = listOf(
+        AttachmentRowItem(painterResource(id = R.drawable.sedona), "id")
+    ))
+}
+
 // - No content
 
 @Preview

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

@@ -1,47 +1,132 @@
 package net.buzzert.kordophonedroid.ui.messagelist
 
+import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.aspectRatio
 import androidx.compose.foundation.layout.fillMaxWidth
+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.width
+import androidx.compose.foundation.lazy.LazyRow
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.BasicTextField
 import androidx.compose.material.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material.Divider
+import androidx.compose.material.Icon
+import androidx.compose.material.IconButton
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Surface
 import androidx.compose.material.Text
+import androidx.compose.material3.ElevatedButton
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.draw.shadow
 import androidx.compose.ui.graphics.SolidColor
-import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.graphics.painter.Painter
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.unit.dp
+import net.buzzert.kordophonedroid.R
+
+data class AttachmentRowItem(
+    val painter: Painter,
+    val id: String,
+)
+
+@Composable
+fun AttachmentRow(
+    attachmentItems: List<AttachmentRowItem>,
+    onClear: () -> Unit,
+) {
+    Divider()
+
+    Row(
+        modifier = Modifier
+            .height(120.dp)
+            .fillMaxWidth()
+            .background(MaterialTheme.colors.onSurface.copy(0.08f))
+            .padding(8.dp)
+    ) {
+        LazyRow {
+            attachmentItems.forEach { attachmentItem ->
+                item {
+                    Image(
+                        painter = attachmentItem.painter,
+                        contentDescription = "attachment",
+                        contentScale = ContentScale.Crop,
+                        modifier = Modifier
+                            .aspectRatio(1.0f)
+                            .clip(RoundedCornerShape(4.dp))
+                    )
+
+                    Spacer(Modifier.width(4.dp))
+                }
+            }
+        }
+
+        Spacer(Modifier.weight(1f))
+
+        ElevatedButton(
+            onClick = onClear,
+            colors = ButtonDefaults.elevatedButtonColors(
+                containerColor = MaterialTheme.colors.background
+            ),
+            modifier = Modifier.align(Alignment.CenterVertically)
+        ) {
+            Text("Remove")
+        }
+    }
+}
 
 @Composable
 fun MessageEntry(
-    keyboardType: KeyboardType = KeyboardType.Text,
-    onTextChanged: (TextFieldValue) -> Unit,
     textFieldValue: TextFieldValue,
+    attachmentItems: List<AttachmentRowItem> = listOf(),
+
+    onAddAttachment: () -> Unit = {},
+    onClearAttachments: () -> Unit = {},
+    onTextChanged: (TextFieldValue) -> Unit,
     onSend: () -> Unit,
 ) {
+    Column {
+        if (attachmentItems.isNotEmpty()) {
+            AttachmentRow(attachmentItems, onClear = onClearAttachments)
+        }
+
         Row(
             modifier = Modifier
                 .background(MaterialTheme.colors.onSurface.copy(alpha = 0.18f))
                 .fillMaxWidth()
-            .padding(vertical = 8.dp, horizontal = 12.dp)
+                .padding(vertical = 8.dp, horizontal = 4.dp)
                 .imePadding()
                 .navigationBarsPadding()
         ) {
+            IconButton(
+                onClick = onAddAttachment,
+            ) {
+                Icon(
+                    painter = painterResource(id = R.drawable.attach_file),
+                    contentDescription = "Attach File"
+                )
+            }
+
+            Spacer(Modifier.width(8.dp))
+
             Surface(
                 shape = MaterialTheme.shapes.medium,
-                modifier = Modifier.weight(1f)
+                modifier = Modifier
+                    .weight(1f)
                     .align(Alignment.CenterVertically)
-                    .shadow(4.dp)
+                    .shadow(3.dp)
             ) {
                 BasicTextField(
                     value = textFieldValue,
@@ -68,8 +153,14 @@ fun MessageEntry(
 
             Spacer(Modifier.width(8.dp))
 
-            Button(onClick = onSend) {
+            Button(
+                onClick = onSend,
+                enabled = (attachmentItems.isNotEmpty() || textFieldValue.text.isNotEmpty())
+            ) {
                 Text(text = "Send")
             }
+
+            Spacer(Modifier.width(8.dp))
+        }
     }
 }

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

@@ -1,6 +1,8 @@
 package net.buzzert.kordophonedroid.ui.messagelist
 
-import android.util.Log
+import android.net.Uri
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
@@ -28,8 +30,7 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.rememberCompositionContext
+import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
@@ -46,6 +47,7 @@ import androidx.core.app.NotificationManagerCompat
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import coil.compose.SubcomposeAsyncImage
+import coil.compose.rememberAsyncImagePainter
 import coil.request.ImageRequest
 import net.buzzert.kordophone.backend.model.GUID
 import net.buzzert.kordophonedroid.ui.Destination
@@ -129,6 +131,13 @@ fun MessageListScreen(
         }
     }
 
+    var attachmentUris by remember { mutableStateOf<Set<Uri>>(mutableSetOf()) }
+    val imagePicker = rememberLauncherForActivityResult(contract = ActivityResultContracts.GetContent()) { uri: Uri? ->
+        uri?.let {
+            attachmentUris = attachmentUris.plus(it)
+        }
+    }
+
     val navController = LocalNavController.current
     Scaffold(
         topBar = {
@@ -138,8 +147,18 @@ fun MessageListScreen(
             messages = messageItems,
             paddingValues = padding,
             showSenders = viewModel.isGroupChat,
+            attachmentUris = attachmentUris,
+            onAddAttachment = {
+                imagePicker.launch("image/*")
+            },
+            onClearAttachments = {
+                attachmentUris = setOf()
+            },
             onSendMessage = { text ->
-                viewModel.enqueueOutgoingMessage(text)
+                viewModel.enqueueOutgoingMessage(
+                    text = text,
+                    attachmentUris = attachmentUris
+                )
             }
         )
     }
@@ -150,6 +169,9 @@ fun MessageTranscript(
     messages: List<MessageListItem>,
     paddingValues: PaddingValues,
     showSenders: Boolean,
+    attachmentUris: Set<Uri>,
+    onAddAttachment: () -> Unit,
+    onClearAttachments: () -> Unit,
     onSendMessage: (text: String) -> Unit,
 ) {
     val scrollState = rememberLazyListState()
@@ -157,6 +179,13 @@ fun MessageTranscript(
         mutableStateOf(TextFieldValue())
     }
 
+    val attachmentRowItems = attachmentUris.map {
+        AttachmentRowItem(
+            painter = rememberAsyncImagePainter(model = it),
+            id = "attachmentID"
+        )
+    }
+
     Column(
         Modifier
             .fillMaxSize()
@@ -172,6 +201,9 @@ fun MessageTranscript(
         MessageEntry(
             onTextChanged = { textState = it },
             textFieldValue = textState,
+            attachmentItems = attachmentRowItems,
+            onAddAttachment = onAddAttachment,
+            onClearAttachments = onClearAttachments,
             onSend = {
                 onSendMessage(textState.text)
 
@@ -198,7 +230,6 @@ fun Messages(
                 .fillMaxSize()
                 .padding(horizontal = 16.dp)
         ) {
-            var lastDate: Date = Date()
             val dateFormatter = SimpleDateFormat.getDateTimeInstance()
 
             for (index in messages.indices) {

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

@@ -1,6 +1,7 @@
 package net.buzzert.kordophonedroid.ui.messagelist
 
 import android.content.Context
+import android.net.Uri
 import android.util.Log
 import androidx.compose.runtime.mutableStateListOf
 import androidx.lifecycle.ViewModel
@@ -97,7 +98,14 @@ class MessageListViewModel @Inject constructor(
 
     val isGroupChat: Boolean get() = conversation!!.isGroupChat
 
-    fun enqueueOutgoingMessage(text: String) {
+    fun enqueueOutgoingMessage(
+        text: String,
+        attachmentUris: Set<Uri>
+    ) {
+        // TODO: Handle attachments!
+        // Probably make a special OutgoingMessage object for this, since a lot of Message fields are
+        // meaningless here. We don't have GUIDs yet either.
+
         val outgoingMessage = Message(
             guid = UUID.randomUUID().toString(),
             text = text,

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

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M720,630Q720,734 647,807Q574,880 470,880Q366,880 293,807Q220,734 220,630L220,260Q220,185 272.5,132.5Q325,80 400,80Q475,80 527.5,132.5Q580,185 580,260L580,610Q580,656 548,688Q516,720 470,720Q424,720 392,688Q360,656 360,610L360,240L440,240L440,610Q440,623 448.5,631.5Q457,640 470,640Q483,640 491.5,631.5Q500,623 500,610L500,260Q499,218 470.5,189Q442,160 400,160Q358,160 329,189Q300,218 300,260L300,630Q299,701 349,750.5Q399,800 470,800Q540,800 589,750.5Q638,701 640,630L640,240L720,240L720,630Z"/>
+</vector>