Adding Export Chat functionality.

app/src/main/AndroidManifest.xml

@@ -31,6 +31,15 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
     </application>
 
 </manifest>

app/src/main/kotlin/dev/chungjungsoo/gptmobile/presentation/ui/chat/ChatScreen.kt

@@ -1,8 +1,11 @@
 package dev.chungjungsoo.gptmobile.presentation.ui.chat
 
+import android.content.Context
+import android.content.Intent
 import android.content.pm.PackageInfo
 import android.content.pm.PackageManager
 import android.util.Log
+import android.widget.Toast
 import androidx.compose.foundation.ScrollState
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
@@ -70,13 +73,15 @@ import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.core.content.FileProvider.getUriForFile
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import dev.chungjungsoo.gptmobile.R
 import dev.chungjungsoo.gptmobile.data.database.entity.Message
 import dev.chungjungsoo.gptmobile.data.model.ApiType
 import dev.chungjungsoo.gptmobile.util.DefaultHashMap
 import dev.chungjungsoo.gptmobile.util.multiScrollStateSaver
+import java.io.File
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 
@@ -115,29 +120,25 @@ fun ChatScreen(
     val question by chatViewModel.question.collectAsStateWithLifecycle()
     val appEnabledPlatforms by chatViewModel.enabledPlatformsInApp.collectAsStateWithLifecycle()
     val editedQuestion by chatViewModel.editedQuestion.collectAsStateWithLifecycle()
-
     val openaiLoadingState by chatViewModel.openaiLoadingState.collectAsStateWithLifecycle()
     val anthropicLoadingState by chatViewModel.anthropicLoadingState.collectAsStateWithLifecycle()
     val googleLoadingState by chatViewModel.googleLoadingState.collectAsStateWithLifecycle()
     val groqLoadingState by chatViewModel.groqLoadingState.collectAsStateWithLifecycle()
     val ollamaLoadingState by chatViewModel.ollamaLoadingState.collectAsStateWithLifecycle()
     val geminiNanoLoadingState by chatViewModel.geminiNanoLoadingState.collectAsStateWithLifecycle()
-
     val userMessage by chatViewModel.userMessage.collectAsStateWithLifecycle()
-
     val openAIMessage by chatViewModel.openAIMessage.collectAsStateWithLifecycle()
     val anthropicMessage by chatViewModel.anthropicMessage.collectAsStateWithLifecycle()
     val googleMessage by chatViewModel.googleMessage.collectAsStateWithLifecycle()
     val groqMessage by chatViewModel.groqMessage.collectAsStateWithLifecycle()
     val ollamaMessage by chatViewModel.ollamaMessage.collectAsStateWithLifecycle()
-
     val geminiNano by chatViewModel.geminiNanoMessage.collectAsStateWithLifecycle()
-
     val canUseChat = (chatViewModel.enabledPlatformsInChat.toSet() - appEnabledPlatforms.toSet()).isEmpty()
     val groupedMessages = remember(messages) { groupMessages(messages) }
     val latestMessageIndex = groupedMessages.keys.maxOrNull() ?: 0
     val chatBubbleScrollStates = rememberSaveable(saver = multiScrollStateSaver) { DefaultHashMap<Int, ScrollState> { ScrollState(0) } }
     val canEnableAICoreMode = rememberSaveable { checkAICoreAvailability(aiCorePackageInfo, privateComputePackageInfo) }
+    val context = LocalContext.current
 
     val scope = rememberCoroutineScope()
 
@@ -160,7 +161,16 @@ fun ChatScreen(
                 indication = null,
                 interactionSource = remember { MutableInteractionSource() }
             ) { focusManager.clearFocus() },
-        topBar = { ChatTopBar(chatRoom.title, chatRoom.id > 0, onBackAction, scrollBehavior, chatViewModel::openChatTitleDialog) },
+        topBar = {
+            ChatTopBar(
+                chatRoom.title,
+                chatRoom.id > 0,
+                onBackAction,
+                scrollBehavior,
+                chatViewModel::openChatTitleDialog,
+                onExportChatItemClick = { exportChat(context, chatViewModel) }
+            )
+        },
         bottomBar = {
             ChatInputBox(
                 value = question,
@@ -366,10 +376,11 @@ private fun groupMessages(messages: List<Message>): HashMap<Int, MutableList<Mes
 @OptIn(ExperimentalMaterial3Api::class)
 private fun ChatTopBar(
     title: String,
-    isChatTitleUpdateEnabled: Boolean,
+    isMenuItemEnabled: Boolean,
     onBackAction: () -> Unit,
     scrollBehavior: TopAppBarScrollBehavior,
-    onChatTitleItemClick: () -> Unit
+    onChatTitleItemClick: () -> Unit,
+    onExportChatItemClick: () -> Unit
 ) {
     var isDropDownMenuExpanded by remember { mutableStateOf(false) }
 
@@ -391,12 +402,13 @@ private fun ChatTopBar(
 
             ChatDropdownMenu(
                 isDropDownMenuExpanded = isDropDownMenuExpanded,
-                isChatTitleUpdateEnabled = isChatTitleUpdateEnabled,
+                isMenuItemEnabled = isMenuItemEnabled,
                 onDismissRequest = { isDropDownMenuExpanded = false },
                 onChatTitleItemClick = {
                     onChatTitleItemClick.invoke()
                     isDropDownMenuExpanded = false
-                }
+                },
+                onExportChatItemClick = onExportChatItemClick
             )
         },
         scrollBehavior = scrollBehavior
@@ -406,20 +418,52 @@ private fun ChatTopBar(
 @Composable
 fun ChatDropdownMenu(
     isDropDownMenuExpanded: Boolean,
-    isChatTitleUpdateEnabled: Boolean,
+    isMenuItemEnabled: Boolean,
     onDismissRequest: () -> Unit,
-    onChatTitleItemClick: () -> Unit
+    onChatTitleItemClick: () -> Unit,
+    onExportChatItemClick: () -> Unit
 ) {
     DropdownMenu(
         modifier = Modifier.wrapContentSize(),
         expanded = isDropDownMenuExpanded,
         onDismissRequest = onDismissRequest
     ) {
         DropdownMenuItem(
-            enabled = isChatTitleUpdateEnabled,
+            enabled = isMenuItemEnabled,
             text = { Text(text = stringResource(R.string.update_chat_title)) },
             onClick = onChatTitleItemClick
         )
+        /* Export Chat */
+        DropdownMenuItem(
+            enabled = isMenuItemEnabled,
+            text = { Text(text = stringResource(R.string.export_chat)) },
+            onClick = {
+                onExportChatItemClick()
+                onDismissRequest()
+            }
+        )
+    }
+}
+
+private fun exportChat(context: Context, chatViewModel: ChatViewModel) {
+    try {
+        val (fileName, fileContent) = chatViewModel.exportChat()
+        val file = File(context.getExternalFilesDir(null), fileName)
+        file.writeText(fileContent)
+        val uri = getUriForFile(context, "${context.packageName}.fileprovider", file)
+        val shareIntent = Intent(Intent.ACTION_SEND).apply {
+            type = "text/markdown"
+            putExtra(Intent.EXTRA_STREAM, uri)
+            addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+        }
+        context.startActivity(
+            Intent.createChooser(shareIntent, "Share Chat Export").apply {
+                addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            }
+        )
+    } catch (e: Exception) {
+        Log.e("ChatExport", "Failed to export chat", e)
+        Toast.makeText(context, "Failed to export chat", Toast.LENGTH_SHORT).show()
     }
 }
 

app/src/main/kotlin/dev/chungjungsoo/gptmobile/presentation/ui/chat/ChatViewModel.kt

@@ -26,7 +26,6 @@ class ChatViewModel @Inject constructor(
     private val chatRepository: ChatRepository,
     private val settingRepository: SettingRepository
 ) : ViewModel() {
-
     sealed class LoadingState {
         data object Idle : LoadingState()
         data object Loading : LoadingState()
@@ -230,6 +229,36 @@ class ChatViewModel @Inject constructor(
         }
     }
 
+    fun exportChat(): Pair<String, String> {
+        // Build the chat history in Markdown format
+        val chatHistoryMarkdown = buildString {
+            appendLine("# Chat Export: \"${chatRoom.value.title}\"")
+            appendLine()
+            appendLine("**Exported on:** ${formatCurrentDateTime()}")
+            appendLine()
+            appendLine("---")
+            appendLine()
+            appendLine("## Chat History")
+            appendLine()
+            messages.value.forEach { message ->
+                val sender = if (message.platformType == null) "User" else "Assistant"
+                appendLine("**$sender:**")
+                appendLine(message.content)
+                appendLine()
+            }
+        }
+
+        // Save the Markdown file
+        val fileName = "export_${chatRoom.value.title}_${System.currentTimeMillis()}.md"
+        return Pair(fileName, chatHistoryMarkdown)
+    }
+
+    private fun formatCurrentDateTime(): String {
+        val currentDate = java.util.Date()
+        val format = java.text.SimpleDateFormat("yyyy-MM-dd hh:mm a", java.util.Locale.getDefault())
+        return format.format(currentDate)
+    }
+
     fun updateQuestion(q: String) = _question.update { q }
 
     private fun addMessage(message: Message) = _messages.update { it + listOf(message) }

app/src/main/res/values/strings.xml

@@ -190,4 +190,5 @@
     <string name="edit">Edit</string>
     <string name="edit_question">Edit User Message</string>
     <string name="user_message">User Message</string>
+    <string name="export_chat">Export Chat</string>
 </resources>

app/src/main/res/xml/file_paths.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <external-files-path
+        name="external_files"
+        path="." />
+</paths>

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-agp = "8.7.2"
+agp = "8.7.3"
 autoLicense = "11.2.2"
 kotlin = "2.0.20"
 coreKtx = "1.15.0"