dm-170

app/src/main/java/com/example/login_v3/data/repository/dm/DM_Basic_Repository.kt

@@ -4,7 +4,9 @@ import android.content.Context
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
 import android.net.Uri
+import android.os.Environment
 import android.provider.OpenableColumns
+import androidx.datastore.core.use
 import com.example.login_v3.data.api.TecnologiaApi
 import com.example.login_v3.data.api.api_class.ChatRoom
 import com.example.login_v3.data.api.api_class.Message
@@ -16,15 +18,24 @@ import com.example.login_v3.home.Message.ViewModel.Detail.MessageDao
 import com.example.login_v3.home.Message.ViewModel.Detail.MessageEntity
 import com.example.login_v3.home.Message.ViewModel.Detail.MessageStatus
 import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.flow.map
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.MultipartBody
+import okhttp3.OkHttpClient
+import okhttp3.Request
 import okhttp3.RequestBody.Companion.toRequestBody
 import java.io.ByteArrayOutputStream
+import java.io.File
+import java.io.FileOutputStream
 import java.util.UUID
 import javax.inject.Inject
 import javax.inject.Singleton
+import kotlin.io.use
+import kotlin.use
 
 @Singleton
 class ChatRoomsRepository @Inject constructor(
@@ -215,40 +226,6 @@ class ChatRoomsRepository @Inject constructor(
         }
     }
 
-    //send message
-    suspend fun sendMessage(
-        roomId: String,
-        content: String,
-        replyToId: String? = null
-    ): Result<Message> {
-        return try {
-            // 打包 Request Body
-            val requestBody = SendMessageRequest(
-                content = content,
-                replyToId = replyToId
-            )
-
-            // 呼叫 API
-            val response = api.sendMessage(roomId, requestBody)
-
-            if (response.isSuccessful) {
-                val body = response.body()
-                if (body != null) {
-                    Result.success(body)
-                } else {
-                    Result.failure(Exception("發送成功但回應身體為空 (Empty response body)"))
-                }
-            } else {
-                // 抓取後端傳回的錯誤訊息
-                val errorMsg = response.errorBody()?.string() ?: "未知錯誤"
-                Result.failure(Exception("發送訊息失敗，錯誤碼: ${response.code()}, 訊息: $errorMsg"))
-            }
-        } catch (e: Exception) {
-            // 捕捉網路斷線或解析 JSON 失敗等狀況
-            Result.failure(e)
-        }
-    }
-
 
     //upload file
     suspend fun uploadAttachment(roomId: String, fileUri: Uri): Result<Message> {
@@ -452,4 +429,69 @@ class ChatRoomsRepository @Inject constructor(
             Result.failure(e)
         }
     }
+
+
+
+    //download file
+    private val httpClient = OkHttpClient()
+    fun downloadFileFromUrlFlow(fileUrl: String, fileName: String): Flow<Result<Float>> = flow {
+        try {
+            // 1. 建立 OkHttp Request，直接 GET 該網址
+            val request = Request.Builder()
+                .url(fileUrl)
+                .get()
+                .build()
+
+            val response = httpClient.newCall(request).execute()
+
+            if (!response.isSuccessful) {
+                emit(Result.failure(Exception("下載失敗，HTTP 錯誤碼: ${response.code}")))
+                return@flow
+            }
+
+            val body = response.body
+            if (body == null) {
+                emit(Result.failure(Exception("下載失敗，回應身體為空")))
+                return@flow
+            }
+
+            // 2. 定義手機本機儲存路徑
+            val targetDirectory = context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS)
+                ?: context.cacheDir
+            val targetFile = File(targetDirectory, fileName)
+
+            // 3. 讀取網路串流並寫入檔案
+            val totalBytes = body.contentLength()
+            var bytesCopied = 0L
+            val buffer = ByteArray(DEFAULT_BUFFER_SIZE)
+
+            body.byteStream().use { inputStream ->
+                FileOutputStream(targetFile).use { outputStream ->
+                    var bytesRead = inputStream.read(buffer)
+
+                    while (bytesRead != -1) {
+                        outputStream.write(buffer, 0, bytesRead)
+                        bytesCopied += bytesRead
+
+                        // 4. 計算並發送進度
+                        if (totalBytes > 0) {
+                            val progress = bytesCopied.toFloat() / totalBytes.toFloat()
+                            emit(Result.success(progress))
+                        } else {
+                            // 如果後端沒給 Content-Length，傳 -1f 走無限轉圈模式
+                            emit(Result.success(-1f))
+                        }
+
+                        bytesRead = inputStream.read(buffer)
+                    }
+                }
+            }
+
+            // 5. 下載成功，發送 100%
+            emit(Result.success(1.0f))
+
+        } catch (e: Exception) {
+            emit(Result.failure(e))
+        }
+    }.flowOn(Dispatchers.IO) // 確保硬碟與網路 I/O 不卡 UI 執行緒
 }

app/src/main/java/com/example/login_v3/home/Message/UI/Detail/Message_Messaging.kt

@@ -80,8 +80,11 @@ import androidx.compose.foundation.layout.sizeIn
 import androidx.compose.foundation.layout.windowInsetsTopHeight
 import androidx.compose.foundation.layout.statusBars // 如果要使用 statusBars 也需要這個
 import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.filled.ArrowDownward
 import androidx.compose.material.icons.filled.Build
 import androidx.compose.material.icons.filled.Call
+import androidx.compose.material.icons.filled.Check
+import androidx.compose.material.icons.filled.Close
 import androidx.compose.material.icons.filled.Info
 import androidx.compose.material.icons.filled.MoreVert
 import androidx.compose.material.icons.filled.PlayArrow
@@ -98,6 +101,7 @@ import com.example.login_v3.home.Message.UI.Detail.Message_Component.ImageLightb
 import com.example.login_v3.home.Message.UI.Detail.Message_Component.MessageAttachmentBar
 import com.example.login_v3.home.Message.UI.Detail.Message_Component.UserStatusDot
 import com.example.login_v3.home.Message.UI.Detail.Message_Component.VideoLightbox
+import com.example.login_v3.home.Message.ViewModel.Detail.DownloadStatus
 
 
 //bottom bar state
@@ -952,7 +956,11 @@ fun MessageRow(
                             }
                         }
 
+                        //file message
                         isFile -> {
+                            // 1. 🎯 從 ViewModel 取得當前訊息的下載狀態
+                            val downloadStatus = viewModel.getDownloadStatus(message.id)
+
                             Box(
                                 modifier = Modifier
                                     .widthIn(max = 260.dp)
@@ -965,7 +973,15 @@ fun MessageRow(
                                     )
                                     .combinedClickable(
                                         onLongClick = { onReplyClick(message) },
-                                        onClick = { onRowClick(message) } // 🎯 點擊時可以在此觸發下載或開啟檔案
+                                        onClick = {
+                                            // 點擊整個氣泡：如果是已完成就直接開啟，否則可維持你原本的行為
+                                            if (downloadStatus is DownloadStatus.Completed) {
+                                                onRowClick(message)
+                                            } else {
+                                                // 也可以在這裡同樣觸發下載
+                                                viewModel.downloadFile(message, displayFileName)
+                                            }
+                                        }
                                     )
                                     .background(color = finalBubbleColor)
                                     .padding(horizontal = 12.dp, vertical = 10.dp)
@@ -975,30 +991,89 @@ fun MessageRow(
                                         RepliedMessagePreview(replied, isMe, partnerDisplayName, currentUserId)
                                     }
 
-                                    // 檔案的 UI 佈局 (左邊圖示，右邊文字)
+                                    // 檔案的 UI 佈局 (左邊按鈕，右邊文字)
                                     Row(
                                         verticalAlignment = Alignment.CenterVertically,
                                         horizontalArrangement = Arrangement.spacedBy(10.dp)
                                     ) {
-                                        // 根據副檔名決定圖示，這裡示範用內建圖示，你也可以換成自己的 zip 圖片
+                                        // 檔案下載按鈕 / 進度顯示
                                         Box(
                                             modifier = Modifier
                                                 .size(40.dp)
-                                                .background(Color.White.copy(alpha = 0.6f), CircleShape),
+                                                .background(Color.White.copy(alpha = 0.6f), CircleShape)
+                                                .clip(CircleShape)
+                                                .clickable {
+                                                    // 2. 🎯 點擊按鈕觸發下載或開啟邏輯
+                                                    when (downloadStatus) {
+                                                        is DownloadStatus.NotStarted, is DownloadStatus.Error -> {
+                                                            viewModel.downloadFile(message, displayFileName)
+                                                        }
+                                                        is DownloadStatus.Completed -> {
+                                                            onRowClick(message) // 觸發下載完成後的開啟檔案
+                                                        }
+                                                        is DownloadStatus.Downloading -> {
+                                                            // 下載中可以留空，或者未來實作取消下載
+                                                        }
+                                                    }
+                                                },
                                             contentAlignment = Alignment.Center
                                         ) {
-                                            Icon(
+                                            // 3. 🎯 根據密封介面 (Sealed Interface) 狀態切換 Icon 與進度條
-                                                imageVector = if (displayFileName.endsWith(".zip") || displayFileName.endsWith(".rar")) {
+                                            when (downloadStatus) {
-                                                    androidx.compose.material.icons.Icons.Default.Build // 或者是常規的 Folder / Img
+                                                is DownloadStatus.NotStarted -> {
-                                                } else {
+                                                    Icon(
-                                                    androidx.compose.material.icons.Icons.Default.Info
+                                                        imageVector = androidx.compose.material.icons.Icons.Default.ArrowDownward,
-                                                },
+                                                        contentDescription = "下載檔案",
-                                                contentDescription = "檔案",
+                                                        tint = Color.Gray,
-                                                tint = Color.Gray,
+                                                        modifier = Modifier.size(24.dp)
-                                                modifier = Modifier.size(24.dp)
+                                                    )
-                                            )
+                                                }
+                                                is DownloadStatus.Downloading -> {
+                                                    // 💡 這裡的 progress 是從 downloadStatus.progress 拿出來的
+                                                    val progress = downloadStatus.progress
+
+                                                    if (progress >= 0f) {
+                                                        CircularProgressIndicator(
+                                                            progress = progress,
+                                                            modifier = Modifier.fillMaxSize().padding(2.dp),
+                                                            color = MaterialTheme.colorScheme.primary,
+                                                            strokeWidth = 3.dp
+                                                        )
+                                                    } else {
+                                                        // 如果後端沒給 Content-Length (progress = -1f)，改跑無限轉圈
+                                                        CircularProgressIndicator(
+                                                            modifier = Modifier.fillMaxSize().padding(2.dp),
+                                                            color = MaterialTheme.colorScheme.primary,
+                                                            strokeWidth = 3.dp
+                                                        )
+                                                    }
+                                                    Icon(
+                                                        imageVector = androidx.compose.material.icons.Icons.Default.Close,
+                                                        contentDescription = "下載中",
+                                                        tint = Color.Gray.copy(alpha = 0.7f),
+                                                        modifier = Modifier.size(16.dp)
+                                                    )
+                                                }
+                                                is DownloadStatus.Completed -> {
+                                                    Icon(
+                                                        imageVector = androidx.compose.material.icons.Icons.Default.Check,
+                                                        contentDescription = "下載完成",
+                                                        tint = Color.Green,
+                                                        modifier = Modifier.size(24.dp)
+                                                    )
+                                                }
+                                                is DownloadStatus.Error -> {
+                                                    Icon(
+                                                        imageVector = androidx.compose.material.icons.Icons.Default.Warning, // 或者是 Refresh 圖示
+                                                        contentDescription = "下載失敗，點擊重試",
+                                                        tint = Color.Red,
+                                                        modifier = Modifier.size(24.dp)
+                                                    )
+                                                }
+                                            }
                                         }
 
+                                        // 右側檔名與資訊
                                         Column(modifier = Modifier.weight(1f)) {
                                             Text(
                                                 text = displayFileName,
@@ -1007,7 +1082,15 @@ fun MessageRow(
                                                 overflow = TextOverflow.Ellipsis
                                             )
                                             Text(
-                                                text = "檔案", // 如果後端有提供大小（例如 12.5 MB），放這裡最適合
+                                                text = when (downloadStatus) {
+                                                    is DownloadStatus.Downloading -> {
+                                                        val progress = downloadStatus.progress
+                                                        if (progress >= 0f) "下載中... ${(progress * 100).toInt()}%" else "下載中..."
+                                                    }
+                                                    is DownloadStatus.Completed -> "已下載"
+                                                    is DownloadStatus.Error -> "下載失敗，點擊重試"
+                                                    else -> "檔案"
+                                                },
                                                 style = MaterialTheme.typography.bodySmall.copy(fontSize = 11.sp, color = Color.Gray)
                                             )
                                         }

app/src/main/java/com/example/login_v3/home/Message/ViewModel/Detail/Message_Messaging_ViewModel.kt

@@ -4,6 +4,7 @@ package com.example.login_v3.home.Message.ViewModel.Detail
 import android.app.Application
 import android.net.Uri
 import android.util.Log
+import androidx.compose.runtime.mutableStateMapOf
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import androidx.media3.common.MediaItem
@@ -73,6 +74,14 @@ data class AudioPlaybackState(
     val duration: Long = 0L                      // 總時長 (毫秒)
 )
 
+// 🎯 檔案下載狀態管理
+sealed interface DownloadStatus {
+    object NotStarted : DownloadStatus
+    data class Downloading(val progress: Float) : DownloadStatus // 儲存 0.0 ~ 1.0f 的進度
+    object Completed : DownloadStatus
+    data class Error(val message: String) : DownloadStatus
+}
+
 
 @HiltViewModel
 class ChatViewModel @Inject constructor(
@@ -381,15 +390,59 @@ class ChatViewModel @Inject constructor(
         progressLogJob = null
     }
 
-    // =====================================================================
-    // 🌟 生命週期釋放：ViewModel 銷毀時，必須徹底關閉 Player
-    // =====================================================================
     override fun onCleared() {
         super.onCleared()
         stopProgressTracker()
         exoPlayer?.release()
         exoPlayer = null
     }
+    // =====================================================================
+
+
+    //file download
+    val fileDownloadStates = mutableStateMapOf<String, DownloadStatus>()
+
+    // 取得特定訊息的下載狀態，若無則預設為 NotStarted
+    fun getDownloadStatus(messageId: String): DownloadStatus {
+        return fileDownloadStates[messageId] ?: DownloadStatus.NotStarted
+    }
+    fun downloadFile(message: Message, displayFileName: String) {
+        val messageId = message.id
+
+        // 🎯 取得後端給的直接 URL。請根據你實際的 Message 資料結構調整欄位名稱
+        val fileUrl = message.content // 假設你把 URL 存放在 content 裡，或是 message.fileUrl
+
+        if (fileUrl.isNullOrBlank()) {
+            fileDownloadStates[messageId] = DownloadStatus.Error("檔案下載連結無效")
+            return
+        }
+
+        if (fileDownloadStates[messageId] is DownloadStatus.Downloading) return
+
+        viewModelScope.launch {
+            fileDownloadStates[messageId] = DownloadStatus.Downloading(0f)
+
+            // 呼叫剛剛改好的 URL 版 Flow
+            repository.downloadFileFromUrlFlow(fileUrl, displayFileName)
+                .collect { progressResult ->
+                    progressResult.onSuccess { progress ->
+                        if (progress >= 1.0f) {
+                            fileDownloadStates[messageId] = DownloadStatus.Completed
+                        } else {
+                            fileDownloadStates[messageId] = DownloadStatus.Downloading(progress)
+                        }
+                    }.onFailure { error ->
+                        Log.e("ChatViewModel", "下載失敗: ${error.message}")
+                        fileDownloadStates[messageId] = DownloadStatus.Error(error.message ?: "下載失敗")
+                    }
+                }
+        }
+    }
+
+    // （選填）如果想要清除特定訊息的狀態（例如錯誤後想重試）
+    fun resetDownloadStatus(messageId: String) {
+        fileDownloadStates.remove(messageId)
+    }
 
     fun resetDeleteMessageState() { _deleteMessageState.value = DeleteMessageState.Idle }
     fun resetSendMessageState() { _sendMessageState.value = SendMessageState.Idle }